12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788899091929394959697989910010110210310410510610710810911011111211311411511611711811912012112212312412512612712812913013113213313413513613713813914014114214314414514614714814915015115215315415515615715815916016116216316416516616716816917017117217317417517617717817918018118218318418518618718818919019119219319419519619719819920020120220320420520620720820921021121221321421521621721821922022122222322422522622722822923023123223323423523623723823924024124224324424524624724824925025125225325425525625725825926026126226326426526626726826927027127227327427527627727827928028128228328428528628728828929029129229329429529629729829930030130230330430530630730830931031131231331431531631731831932032132232332432532632732832933033133233333433533633733833934034134234334434534634734834935035135235335435535635735835936036136236336436536636736836937037137237337437537637737837938038138238338438538638738838939039139239339439539639739839940040140240340440540640740840941041141241341441541641741841942042142242342442542642742842943043143243343443543643743843944044144244344444544644744844945045145245345445545645745845946046146246346446546646746846947047147247347447547647747847948048148248348448548648748848949049149249349449549649749849950050150250350450550650750850951051151251351451551651751851952052152252352452552652752852953053153253353453553653753853954054154254354454554654754854955055155255355455555655755855956056156256356456556656756856957057157257357457557657757857958058158258358458558658758858959059159259359459559659759859960060160260360460560660760860961061161261361461561661761861962062162262362462562662762862963063163263363463563663763863964064164264364464564664764864965065165265365465565665765865966066166266366466566666766866967067167267367467567667767867968068168268368468568668768868969069169269369469569669769869970070170270370470570670770870971071171271371471571671771871972072172272372472572672772872973073173273373473573673773873974074174274374474574674774874975075175275375475575675775875976076176276376476576676776876977077177277377477577677777877978078178278378478578678778878979079179279379479579679779879980080180280380480580680780880981081181281381481581681781881982082182282382482582682782882983083183283383483583683783883984084184284384484584684784884985085185285385485585685785885986086186286386486586686786886987087187287387487587687787887988088188288388488588688788888989089189289389489589689789889990090190290390490590690790890991091191291391491591691791891992092192292392492592692792892993093193293393493593693793893994094194294394494594694794894995095195295395495595695795895996096196296396496596696796896997097197297397497597697797897998098198298398498598698798898999099199299399499599699799899910001001100210031004100510061007100810091010101110121013101410151016101710181019102010211022102310241025102610271028102910301031103210331034103510361037103810391040104110421043104410451046104710481049105010511052105310541055105610571058105910601061106210631064106510661067106810691070107110721073107410751076107710781079108010811082108310841085108610871088108910901091109210931094109510961097109810991100110111021103110411051106110711081109111011111112111311141115111611171118111911201121112211231124112511261127112811291130113111321133113411351136113711381139114011411142114311441145114611471148114911501151115211531154115511561157115811591160116111621163116411651166116711681169117011711172117311741175117611771178117911801181118211831184118511861187118811891190119111921193119411951196119711981199120012011202120312041205120612071208120912101211121212131214121512161217121812191220122112221223122412251226122712281229123012311232123312341235123612371238123912401241124212431244124512461247124812491250125112521253125412551256125712581259126012611262126312641265126612671268126912701271127212731274127512761277127812791280128112821283128412851286128712881289129012911292129312941295129612971298129913001301130213031304130513061307130813091310131113121313131413151316131713181319132013211322132313241325132613271328132913301331133213331334133513361337133813391340134113421343134413451346134713481349135013511352135313541355135613571358135913601361136213631364136513661367136813691370137113721373137413751376137713781379138013811382138313841385138613871388138913901391139213931394139513961397139813991400140114021403140414051406140714081409141014111412141314141415141614171418141914201421142214231424142514261427142814291430143114321433143414351436143714381439144014411442144314441445144614471448144914501451145214531454145514561457145814591460146114621463146414651466146714681469147014711472147314741475147614771478147914801481148214831484148514861487148814891490149114921493149414951496149714981499150015011502150315041505150615071508150915101511151215131514151515161517151815191520152115221523152415251526152715281529153015311532153315341535153615371538153915401541154215431544154515461547154815491550155115521553155415551556155715581559156015611562156315641565156615671568156915701571157215731574157515761577157815791580158115821583158415851586158715881589159015911592159315941595159615971598159916001601160216031604160516061607160816091610161116121613161416151616161716181619162016211622162316241625162616271628162916301631163216331634163516361637163816391640164116421643164416451646164716481649165016511652165316541655165616571658165916601661166216631664166516661667166816691670167116721673167416751676167716781679168016811682168316841685168616871688168916901691169216931694169516961697169816991700170117021703170417051706170717081709171017111712171317141715171617171718171917201721172217231724172517261727172817291730173117321733173417351736173717381739174017411742174317441745174617471748174917501751175217531754175517561757175817591760176117621763176417651766176717681769177017711772177317741775177617771778177917801781178217831784178517861787178817891790179117921793179417951796179717981799180018011802180318041805180618071808180918101811181218131814181518161817181818191820182118221823182418251826182718281829183018311832183318341835183618371838183918401841184218431844184518461847184818491850185118521853185418551856185718581859186018611862186318641865186618671868186918701871187218731874187518761877187818791880188118821883188418851886188718881889189018911892189318941895189618971898189919001901190219031904190519061907190819091910191119121913191419151916191719181919192019211922192319241925192619271928192919301931193219331934193519361937193819391940194119421943194419451946194719481949195019511952195319541955195619571958195919601961196219631964196519661967196819691970197119721973197419751976197719781979198019811982198319841985198619871988198919901991199219931994199519961997199819992000200120022003200420052006200720082009201020112012201320142015201620172018201920202021202220232024202520262027202820292030203120322033203420352036203720382039204020412042204320442045204620472048204920502051205220532054205520562057205820592060206120622063206420652066206720682069207020712072207320742075207620772078207920802081208220832084208520862087208820892090209120922093209420952096209720982099210021012102210321042105210621072108210921102111211221132114211521162117211821192120212121222123212421252126212721282129213021312132213321342135213621372138213921402141214221432144214521462147214821492150215121522153215421552156215721582159216021612162216321642165216621672168216921702171217221732174217521762177217821792180218121822183218421852186218721882189219021912192219321942195219621972198219922002201220222032204220522062207220822092210221122122213221422152216221722182219222022212222222322242225222622272228222922302231223222332234223522362237223822392240224122422243224422452246224722482249225022512252225322542255225622572258225922602261226222632264226522662267226822692270227122722273227422752276227722782279228022812282228322842285228622872288228922902291229222932294229522962297229822992300230123022303230423052306230723082309231023112312231323142315231623172318231923202321232223232324232523262327232823292330233123322333233423352336233723382339234023412342234323442345234623472348234923502351235223532354235523562357235823592360236123622363236423652366236723682369237023712372237323742375237623772378237923802381238223832384238523862387238823892390239123922393239423952396239723982399240024012402240324042405240624072408240924102411241224132414241524162417241824192420242124222423242424252426242724282429243024312432243324342435243624372438243924402441244224432444244524462447244824492450245124522453245424552456245724582459246024612462246324642465246624672468246924702471 |
- /*
- * PicoDrive
- * (C) notaz, 2009,2010,2013
- * (C) kub, 2019
- *
- * This work is licensed under the terms of MAME license.
- * See COPYING file in the top-level directory.
- *
- * Register map:
- * a15100 F....... R.....EA F.....AC N...VHMP 4000 // Fm Ren nrEs Aden Cart heN V H cMd Pwm
- * a15102 ........ ......SM ? 4002 // intS intM
- * a15104 ........ ......10 ........ hhhhhhhh 4004 // bk1 bk0 Hint
- * a15106 ........ F....SDR UE...... .....SDR 4006 // Full 68S Dma Rv fUll[fb] Empt[fb]
- * a15108 (32bit DREQ src) 4008
- * a1510c (32bit DREQ dst) 400c
- * a15110 llllllll llllll00 4010 // DREQ Len
- * a15112 (16bit FIFO reg) 4012
- * a15114 0 (16bit VRES clr) 4014
- * a15116 0 (16bit Vint clr) 4016
- * a15118 0 (16bit Hint clr) 4018
- * a1511a .......? .......C (16bit CMD clr) 401a // TV Cm
- * a1511c 0 (16bit PWM clr) 401c
- * a1511e 0 ? 401e
- * a15120 (16 bytes comm) 2020
- * a15130 (PWM) 2030
- *
- * SH2 addr lines:
- * iii. .cc. ..xx * // Internal, Cs, x
- *
- * sh2 map, wait/bus cycles (from docs):
- * r w
- * rom 0000000-0003fff 1 -
- * sys reg 0004000-00040ff 1 1
- * vdp reg 0004100-00041ff 5 5
- * vdp pal 0004200-00043ff 5 5
- * cart 2000000-23fffff 6-15
- * dram/fb 4000000-401ffff 5-12 1-3
- * fb ovr 4020000-403ffff
- * sdram 6000000-603ffff 12 2 (cycles)
- * d.a. c0000000-?
- */
- #include "../pico_int.h"
- #include "../memory.h"
- #include "../../cpu/sh2/compiler.h"
- DRC_DECLARE_SR;
- static const char str_mars[] = "MARS";
- void *p32x_bios_g, *p32x_bios_m, *p32x_bios_s;
- struct Pico32xMem *Pico32xMem;
- static void bank_switch_rom_68k(int b);
- static void (*m68k_write8_io)(u32 a, u32 d);
- static void (*m68k_write16_io)(u32 a, u32 d);
- // addressing byte in 16bit reg
- #define REG8IN16(ptr, offs) ((u8 *)ptr)[(offs) ^ 1]
- // poll detection
- #define POLL_THRESHOLD 5
- static struct {
- u32 addr1, addr2, cycles;
- int cnt;
- } m68k_poll;
- static int m68k_poll_detect(u32 a, u32 cycles, u32 flags)
- {
- int ret = 0;
- // support polling on 2 addresses - seen in Wolfenstein
- int match = (a - m68k_poll.addr1 <= 2 || a - m68k_poll.addr2 <= 2);
- if (match && cycles - m68k_poll.cycles <= 64 && !SekNotPolling)
- {
- // detect split 32bit access by same cycle count, and ignore those
- if (cycles != m68k_poll.cycles && ++m68k_poll.cnt >= POLL_THRESHOLD) {
- if (!(Pico32x.emu_flags & flags)) {
- elprintf(EL_32X, "m68k poll addr %08x, cyc %u",
- a, cycles - m68k_poll.cycles);
- }
- Pico32x.emu_flags |= flags;
- ret = 1;
- }
- }
- else {
- // reset poll state in case of restart by interrupt
- Pico32x.emu_flags &= ~(P32XF_68KCPOLL|P32XF_68KVPOLL);
- SekSetStop(0);
- m68k_poll.cnt = 0;
- if (!match) {
- m68k_poll.addr2 = m68k_poll.addr1;
- m68k_poll.addr1 = a;
- }
- SekNotPolling = 0;
- }
- m68k_poll.cycles = cycles;
- return ret;
- }
- void p32x_m68k_poll_event(u32 flags)
- {
- if (Pico32x.emu_flags & flags) {
- elprintf(EL_32X, "m68k poll %02x -> %02x", Pico32x.emu_flags,
- Pico32x.emu_flags & ~flags);
- Pico32x.emu_flags &= ~flags;
- SekSetStop(0);
- }
- m68k_poll.addr1 = m68k_poll.addr2 = m68k_poll.cnt = 0;
- }
- void NOINLINE p32x_sh2_poll_detect(u32 a, SH2 *sh2, u32 flags, int maxcnt)
- {
- u32 cycles_done = sh2_cycles_done_t(sh2);
- u32 cycles_diff = cycles_done - sh2->poll_cycles;
- // reading 2 consecutive 16bit values is probably a 32bit access. detect this
- // by checking address (max 2 bytes away) and cycles (max 2 cycles later).
- // no polling if more than 20 cycles have passed since last detect call.
- if (a - sh2->poll_addr <= 2 && CYCLES_GE(20, cycles_diff)) {
- if (CYCLES_GT(cycles_diff, 2) && ++sh2->poll_cnt >= maxcnt) {
- if (!(sh2->state & flags))
- elprintf_sh2(sh2, EL_32X, "state: %02x->%02x",
- sh2->state, sh2->state | flags);
- sh2->state |= flags;
- sh2_end_run(sh2, 1);
- pevt_log_sh2(sh2, EVT_POLL_START);
- #ifdef DRC_SH2
- // mark this as an address used for polling if SDRAM
- if ((a & 0xc6000000) == 0x06000000) {
- unsigned char *p = sh2->p_drcblk_ram;
- p[(a & 0x3ffff) >> SH2_DRCBLK_RAM_SHIFT] |= 0x80;
- // mark next word too to enable poll fifo for 32bit access
- p[((a+2) & 0x3ffff) >> SH2_DRCBLK_RAM_SHIFT] |= 0x80;
- }
- #endif
- }
- }
- else if (!(sh2->state & (SH2_STATE_CPOLL|SH2_STATE_VPOLL|SH2_STATE_RPOLL))) {
- sh2->poll_cnt = 0;
- sh2->poll_addr = a;
- }
- sh2->poll_cycles = cycles_done;
- }
- void NOINLINE p32x_sh2_poll_event(SH2 *sh2, u32 flags, u32 m68k_cycles)
- {
- if (sh2->state & flags) {
- elprintf_sh2(sh2, EL_32X, "state: %02x->%02x", sh2->state,
- sh2->state & ~flags);
- if (sh2->m68krcycles_done < m68k_cycles && !(sh2->state & SH2_STATE_RUN))
- sh2->m68krcycles_done = m68k_cycles;
- pevt_log_sh2_o(sh2, EVT_POLL_END);
- sh2->state &= ~flags;
- }
- if (!(sh2->state & (SH2_STATE_CPOLL|SH2_STATE_VPOLL|SH2_STATE_RPOLL)))
- sh2->poll_addr = sh2->poll_cycles = sh2->poll_cnt = 0;
- }
- static void sh2s_sync_on_read(SH2 *sh2, unsigned cycles)
- {
- if (sh2->poll_cnt != 0)
- return;
- if (p32x_sh2_ready(sh2->other_sh2, cycles-250))
- p32x_sync_other_sh2(sh2, cycles);
- }
- // poll fifo, stores writes to potential addresses used for polling.
- // This is used to correctly deliver syncronisation data to the 3 cpus. The
- // fifo stores 16 bit values, 8/32 bit accesses must be adapted accordingly.
- #define PFIFO_SZ 4
- #define PFIFO_CNT 8
- struct sh2_poll_fifo {
- u32 cycles;
- u32 a;
- u16 d;
- int cpu;
- } sh2_poll_fifo[PFIFO_CNT][PFIFO_SZ];
- unsigned sh2_poll_rd[PFIFO_CNT], sh2_poll_wr[PFIFO_CNT]; // ringbuffer pointers
- static NOINLINE u32 sh2_poll_read(u32 a, u32 d, unsigned int cycles, SH2* sh2)
- {
- int hix = (a >> 1) % PFIFO_CNT;
- struct sh2_poll_fifo *fifo = sh2_poll_fifo[hix];
- struct sh2_poll_fifo *p;
- int cpu = sh2 ? sh2->is_slave : -1;
- unsigned idx;
- a &= ~0x20000000; // ignore writethrough bit
- // fetch oldest write to address from fifo, but stop when reaching the present
- idx = sh2_poll_rd[hix];
- while (idx != sh2_poll_wr[hix] && CYCLES_GE(cycles, fifo[idx].cycles)) {
- p = &fifo[idx];
- idx = (idx+1) % PFIFO_SZ;
- if (cpu != p->cpu) {
- if (CYCLES_GT(cycles, p->cycles+80)) {
- // drop older fifo stores that may cause synchronisation problems.
- p->a = -1;
- } else if (p->a == a) {
- // replace current data with fifo value and discard fifo entry
- d = p->d;
- p->a = -1;
- break;
- }
- }
- }
- return d;
- }
- static NOINLINE void sh2_poll_write(u32 a, u32 d, unsigned int cycles, SH2 *sh2)
- {
- int hix = (a >> 1) % PFIFO_CNT;
- struct sh2_poll_fifo *fifo = sh2_poll_fifo[hix];
- struct sh2_poll_fifo *q;
- int cpu = sh2 ? sh2->is_slave : -1;
- unsigned rd = sh2_poll_rd[hix], wr = sh2_poll_wr[hix];
- unsigned idx, nrd;
- a &= ~0x20000000; // ignore writethrough bit
- // throw out any values written by other cpus, plus heading cancelled stuff
- for (idx = nrd = wr; idx != rd; ) {
- idx = (idx-1) % PFIFO_SZ;
- q = &fifo[idx];
- if (q->a == a && q->cpu != cpu) { q->a = -1; }
- if (q->a != -1) { nrd = idx; }
- }
- rd = nrd;
- // fold 2 consecutive writes to the same address to avoid reading of
- // intermediate values that may cause synchronisation problems.
- // NB this can take an eternity on m68k: mov.b <addr1.l>,<addr2.l> needs
- // 28 m68k-cycles (~80 sh2-cycles) to complete (observed in Metal Head)
- q = &fifo[(sh2_poll_wr[hix]-1) % PFIFO_SZ];
- if (rd != wr && q->a == a && !CYCLES_GT(cycles,q->cycles + (cpu<0 ? 30:4))) {
- q->d = d;
- } else {
- // store write to poll address in fifo
- fifo[wr] =
- (struct sh2_poll_fifo){ .cycles = cycles, .a = a, .d = d, .cpu = cpu };
- wr = (wr+1) % PFIFO_SZ;
- if (wr == rd)
- // fifo overflow, discard oldest value
- rd = (rd+1) % PFIFO_SZ;
- }
- sh2_poll_rd[hix] = rd; sh2_poll_wr[hix] = wr;
- }
- u32 REGPARM(3) p32x_sh2_poll_memory8(u32 a, u32 d, SH2 *sh2)
- {
- int shift = (a & 1 ? 0 : 8);
- d = (s8)(p32x_sh2_poll_memory16(a & ~1, d << shift, sh2) >> shift);
- return d;
- }
- u32 REGPARM(3) p32x_sh2_poll_memory16(u32 a, u32 d, SH2 *sh2)
- {
- unsigned char *p = sh2->p_drcblk_ram;
- unsigned int cycles;
- DRC_SAVE_SR(sh2);
- // is this a synchronisation address?
- if(p[(a & 0x3ffff) >> SH2_DRCBLK_RAM_SHIFT] & 0x80) {
- cycles = sh2_cycles_done_m68k(sh2);
- sh2s_sync_on_read(sh2, cycles);
- // check poll fifo and sign-extend the result correctly
- d = (s16)sh2_poll_read(a, d, cycles, sh2);
- }
- p32x_sh2_poll_detect(a, sh2, SH2_STATE_RPOLL, 5);
- DRC_RESTORE_SR(sh2);
- return d;
- }
- u32 REGPARM(3) p32x_sh2_poll_memory32(u32 a, u32 d, SH2 *sh2)
- {
- unsigned char *p = sh2->p_drcblk_ram;
- unsigned int cycles;
- DRC_SAVE_SR(sh2);
- // is this a synchronisation address?
- if(p[(a & 0x3ffff) >> SH2_DRCBLK_RAM_SHIFT] & 0x80) {
- cycles = sh2_cycles_done_m68k(sh2);
- sh2s_sync_on_read(sh2, cycles);
- // check poll fifo and sign-extend the result correctly
- d = (sh2_poll_read(a, d >> 16, cycles, sh2) << 16) |
- ((u16)sh2_poll_read(a+2, d, cycles, sh2));
- }
- p32x_sh2_poll_detect(a, sh2, SH2_STATE_RPOLL, 5);
- DRC_RESTORE_SR(sh2);
- return d;
- }
- // SH2 faking
- //#define FAKE_SH2
- #ifdef FAKE_SH2
- static int p32x_csum_faked;
- static const u16 comm_fakevals[] = {
- 0x4d5f, 0x4f4b, // M_OK
- 0x535f, 0x4f4b, // S_OK
- 0x4D41, 0x5346, // MASF - Brutal Unleashed
- 0x5331, 0x4d31, // Darxide
- 0x5332, 0x4d32,
- 0x5333, 0x4d33,
- 0x0000, 0x0000, // eq for doom
- 0x0002, // Mortal Kombat
- // 0, // pad
- };
- static u32 sh2_comm_faker(u32 a)
- {
- static int f = 0;
- if (a == 0x28 && !p32x_csum_faked) {
- p32x_csum_faked = 1;
- return *(unsigned short *)(Pico.rom + 0x18e);
- }
- if (f >= sizeof(comm_fakevals) / sizeof(comm_fakevals[0]))
- f = 0;
- return comm_fakevals[f++];
- }
- #endif
- // ------------------------------------------------------------------
- // 68k regs
- static u32 p32x_reg_read16(u32 a)
- {
- a &= 0x3e;
- #if 0
- if ((a & 0x30) == 0x20)
- return sh2_comm_faker(a);
- #else
- if ((a & 0x30) == 0x20) {
- unsigned int cycles = SekCyclesDone();
- if (CYCLES_GT(cycles - msh2.m68krcycles_done, 244))
- p32x_sync_sh2s(cycles);
- if (m68k_poll_detect(a, cycles, P32XF_68KCPOLL)) {
- SekSetStop(1);
- SekEndRun(16);
- }
- return sh2_poll_read(a, Pico32x.regs[a / 2], cycles, NULL);
- }
- #endif
- if (a == 2) { // INTM, INTS
- unsigned int cycles = SekCyclesDone();
- if (CYCLES_GT(cycles - msh2.m68krcycles_done, 64))
- p32x_sync_sh2s(cycles);
- goto out;
- }
- if ((a & 0x30) == 0x30)
- return p32x_pwm_read16(a, NULL, SekCyclesDone());
- out:
- return Pico32x.regs[a / 2];
- }
- static void dreq0_write(u16 *r, u32 d)
- {
- if (!(r[6 / 2] & P32XS_68S)) {
- elprintf(EL_32X|EL_ANOMALY, "DREQ FIFO w16 without 68S?");
- return; // ignored - tested
- }
- if (Pico32x.dmac0_fifo_ptr < DMAC_FIFO_LEN) {
- Pico32x.dmac_fifo[Pico32x.dmac0_fifo_ptr++] = d;
- if (Pico32x.dmac0_fifo_ptr == DMAC_FIFO_LEN)
- r[6 / 2] |= P32XS_FULL;
- // tested: len register decrements and 68S clears
- // even if SH2s/DMAC aren't active..
- r[0x10 / 2]--;
- if (r[0x10 / 2] == 0)
- r[6 / 2] &= ~P32XS_68S;
- if ((Pico32x.dmac0_fifo_ptr & 3) == 0) {
- p32x_sync_sh2s(SekCyclesDone());
- p32x_dreq0_trigger();
- }
- }
- else
- elprintf(EL_32X|EL_ANOMALY, "DREQ FIFO overflow!");
- }
- // writable bits tested
- static void p32x_reg_write8(u32 a, u32 d)
- {
- u16 *r = Pico32x.regs;
- a &= 0x3f;
- // for things like bset on comm port
- m68k_poll.cnt = 0;
- switch (a) {
- case 0x00: // adapter ctl: FM writable
- REG8IN16(r, 0x00) = d & 0x80;
- return;
- case 0x01: // adapter ctl: RES and ADEN writable
- if ((d ^ r[0]) & d & P32XS_nRES)
- p32x_reset_sh2s();
- REG8IN16(r, 0x01) &= ~(P32XS_nRES|P32XS_ADEN);
- REG8IN16(r, 0x01) |= d & (P32XS_nRES|P32XS_ADEN);
- return;
- case 0x02: // ignored, always 0
- return;
- case 0x03: // irq ctl
- if ((d ^ r[0x02 / 2]) & 3) {
- unsigned int cycles = SekCyclesDone();
- p32x_sync_sh2s(cycles);
- r[0x02 / 2] = d & 3;
- p32x_update_cmd_irq(NULL, cycles);
- }
- return;
- case 0x04: // ignored, always 0
- return;
- case 0x05: // bank
- d &= 3;
- if (r[0x04 / 2] != d) {
- r[0x04 / 2] = d;
- bank_switch_rom_68k(d);
- }
- return;
- case 0x06: // ignored, always 0
- return;
- case 0x07: // DREQ ctl
- REG8IN16(r, 0x07) &= ~(P32XS_68S|P32XS_DMA|P32XS_RV);
- if (!(d & P32XS_68S)) {
- Pico32x.dmac0_fifo_ptr = 0;
- REG8IN16(r, 0x07) &= ~P32XS_FULL;
- }
- REG8IN16(r, 0x07) |= d & (P32XS_68S|P32XS_DMA|P32XS_RV);
- return;
- case 0x08: // ignored, always 0
- return;
- case 0x09: // DREQ src
- REG8IN16(r, 0x09) = d;
- return;
- case 0x0a:
- REG8IN16(r, 0x0a) = d;
- return;
- case 0x0b:
- REG8IN16(r, 0x0b) = d & 0xfe;
- return;
- case 0x0c: // ignored, always 0
- return;
- case 0x0d: // DREQ dest
- case 0x0e:
- case 0x0f:
- case 0x10: // DREQ len
- REG8IN16(r, a) = d;
- return;
- case 0x11:
- REG8IN16(r, a) = d & 0xfc;
- return;
- // DREQ FIFO - writes to odd addr go to fifo
- // do writes to even work? Reads return 0
- case 0x12:
- REG8IN16(r, a) = d;
- return;
- case 0x13:
- d = (REG8IN16(r, 0x12) << 8) | (d & 0xff);
- REG8IN16(r, 0x12) = 0;
- dreq0_write(r, d);
- return;
- case 0x14: // ignored, always 0
- case 0x15:
- case 0x16:
- case 0x17:
- case 0x18:
- case 0x19:
- return;
- case 0x1a: // what's this?
- elprintf(EL_32X|EL_ANOMALY, "mystery w8 %02x %02x", a, d);
- REG8IN16(r, a) = d & 0x01;
- return;
- case 0x1b: // TV
- REG8IN16(r, a) = d & 0x01;
- return;
- case 0x1c: // ignored, always 0
- case 0x1d:
- case 0x1e:
- case 0x1f:
- return;
- case 0x20: // comm port
- case 0x21:
- case 0x22:
- case 0x23:
- case 0x24:
- case 0x25:
- case 0x26:
- case 0x27:
- case 0x28:
- case 0x29:
- case 0x2a:
- case 0x2b:
- case 0x2c:
- case 0x2d:
- case 0x2e:
- case 0x2f:
- if (REG8IN16(r, a) != d) {
- unsigned int cycles = SekCyclesDone();
- if (CYCLES_GT(cycles - msh2.m68krcycles_done, 64))
- p32x_sync_sh2s(cycles);
- REG8IN16(r, a) = d;
- p32x_sh2_poll_event(&sh2s[0], SH2_STATE_CPOLL, cycles);
- p32x_sh2_poll_event(&sh2s[1], SH2_STATE_CPOLL, cycles);
- sh2_poll_write(a & ~1, r[a / 2], cycles, NULL);
- }
- return;
- case 0x30:
- return;
- case 0x31: // PWM control
- REG8IN16(r, a) &= ~0x0f;
- REG8IN16(r, a) |= d & 0x0f;
- d = r[0x30 / 2];
- goto pwm_write;
- case 0x32: // PWM cycle
- REG8IN16(r, a) = d & 0x0f;
- d = r[0x32 / 2];
- goto pwm_write;
- case 0x33:
- REG8IN16(r, a) = d;
- d = r[0x32 / 2];
- goto pwm_write;
- // PWM pulse regs.. Only writes to odd address send a value
- // to FIFO; reads are 0 (except status bits)
- case 0x34:
- case 0x36:
- case 0x38:
- REG8IN16(r, a) = d;
- return;
- case 0x35:
- case 0x37:
- case 0x39:
- d = (REG8IN16(r, a ^ 1) << 8) | (d & 0xff);
- REG8IN16(r, a ^ 1) = 0;
- goto pwm_write;
- case 0x3a: // ignored, always 0
- case 0x3b:
- case 0x3c:
- case 0x3d:
- case 0x3e:
- case 0x3f:
- return;
- pwm_write:
- p32x_pwm_write16(a & ~1, d, NULL, SekCyclesDone());
- return;
- }
- }
- static void p32x_reg_write16(u32 a, u32 d)
- {
- u16 *r = Pico32x.regs;
- a &= 0x3e;
- // for things like bset on comm port
- m68k_poll.cnt = 0;
- switch (a/2) {
- case 0x00/2: // adapter ctl
- if ((d ^ r[0]) & d & P32XS_nRES)
- p32x_reset_sh2s();
- r[0] &= ~(P32XS_FM|P32XS_nRES|P32XS_ADEN);
- r[0] |= d & (P32XS_FM|P32XS_nRES|P32XS_ADEN);
- return;
- case 0x08/2: // DREQ src
- r[a / 2] = d & 0xff;
- return;
- case 0x0a/2:
- r[a / 2] = d & ~1;
- return;
- case 0x0c/2: // DREQ dest
- r[a / 2] = d & 0xff;
- return;
- case 0x0e/2:
- r[a / 2] = d;
- return;
- case 0x10/2: // DREQ len
- r[a / 2] = d & ~3;
- return;
- case 0x12/2: // FIFO reg
- dreq0_write(r, d);
- return;
- case 0x1a/2: // TV + mystery bit
- r[a / 2] = d & 0x0101;
- return;
- case 0x20/2: // comm port
- case 0x22/2:
- case 0x24/2:
- case 0x26/2:
- case 0x28/2:
- case 0x2a/2:
- case 0x2c/2:
- case 0x2e/2:
- if (r[a / 2] != d) {
- unsigned int cycles = SekCyclesDone();
- if (CYCLES_GT(cycles - msh2.m68krcycles_done, 64))
- p32x_sync_sh2s(cycles);
- r[a / 2] = d;
- p32x_sh2_poll_event(&sh2s[0], SH2_STATE_CPOLL, cycles);
- p32x_sh2_poll_event(&sh2s[1], SH2_STATE_CPOLL, cycles);
- sh2_poll_write(a, (u16)d, cycles, NULL);
- }
- return;
- case 0x30/2: // PWM control
- d = (r[a / 2] & ~0x0f) | (d & 0x0f);
- r[a / 2] = d;
- p32x_pwm_write16(a, d, NULL, SekCyclesDone());
- return;
- case 0x32/2:
- case 0x34/2:
- case 0x36/2:
- case 0x38/2:
- case 0x3a/2:
- case 0x3c/2:
- case 0x3e/2:
- p32x_pwm_write16(a, d, NULL, SekCyclesDone());
- return;
- }
- p32x_reg_write8(a + 1, d);
- }
- // ------------------------------------------------------------------
- // VDP regs
- static u32 p32x_vdp_read16(u32 a)
- {
- u32 d;
- a &= 0x0e;
- d = Pico32x.vdp_regs[a / 2];
- if (a == 0x0a) {
- // tested: FEN seems to be randomly pulsing on hcnt 0x80-0xf0,
- // most often at 0xb1-0xb5, even during vblank,
- // what's the deal with that?
- // we'll just fake it along with hblank for now
- Pico32x.vdp_fbcr_fake++;
- if (Pico32x.vdp_fbcr_fake & 4)
- d |= P32XV_HBLK;
- if ((Pico32x.vdp_fbcr_fake & 7) == 0)
- d |= P32XV_nFEN;
- }
- return d;
- }
- static void p32x_vdp_write8(u32 a, u32 d)
- {
- u16 *r = Pico32x.vdp_regs;
- a &= 0x0f;
- // TODO: verify what's writeable
- switch (a) {
- case 0x01:
- // priority inversion is handled in palette
- if ((r[0] ^ d) & P32XV_PRI)
- Pico32x.dirty_pal = 1;
- r[0] = (r[0] & P32XV_nPAL) | (d & 0xff);
- break;
- case 0x03: // shift (for pp mode)
- r[2 / 2] = d & 1;
- break;
- case 0x05: // fill len
- r[4 / 2] = d & 0xff;
- break;
- case 0x0b:
- d &= 1;
- Pico32x.pending_fb = d;
- // if we are blanking and FS bit is changing
- if (((r[0x0a/2] & P32XV_VBLK) || (r[0] & P32XV_Mx) == 0) && ((r[0x0a/2] ^ d) & P32XV_FS)) {
- r[0x0a/2] ^= P32XV_FS;
- Pico32xSwapDRAM(d ^ 1);
- elprintf(EL_32X, "VDP FS: %d", r[0x0a/2] & P32XV_FS);
- }
- break;
- }
- }
- static void p32x_vdp_write16(u32 a, u32 d, SH2 *sh2)
- {
- a &= 0x0e;
- if (a == 6) { // fill start
- Pico32x.vdp_regs[6 / 2] = d;
- return;
- }
- if (a == 8) { // fill data
- u16 *dram = Pico32xMem->dram[(Pico32x.vdp_regs[0x0a/2] & P32XV_FS) ^ 1];
- int len = Pico32x.vdp_regs[4 / 2] + 1;
- int len1 = len;
- a = Pico32x.vdp_regs[6 / 2];
- while (len1--) {
- dram[a] = d;
- a = (a & 0xff00) | ((a + 1) & 0xff);
- }
- Pico32x.vdp_regs[0x06 / 2] = a;
- Pico32x.vdp_regs[0x08 / 2] = d;
- if (sh2 != NULL && len > 8) {
- Pico32x.vdp_regs[0x0a / 2] |= P32XV_nFEN;
- // supposedly takes 3 bus/6 sh2 cycles? or 3 sh2 cycles?
- p32x_event_schedule_sh2(sh2, P32X_EVENT_FILLEND, 3 + len);
- }
- return;
- }
- p32x_vdp_write8(a | 1, d);
- }
- // ------------------------------------------------------------------
- // SH2 regs
- static u32 p32x_sh2reg_read16(u32 a, SH2 *sh2)
- {
- u16 *r = Pico32x.regs;
- unsigned cycles;
- a &= 0x3e;
- switch (a/2) {
- case 0x00/2: // adapter/irq ctl
- return (r[0] & P32XS_FM) | Pico32x.sh2_regs[0]
- | Pico32x.sh2irq_mask[sh2->is_slave];
- case 0x04/2: // H count (often as comm too)
- p32x_sh2_poll_detect(a, sh2, SH2_STATE_CPOLL, 9);
- cycles = sh2_cycles_done_m68k(sh2);
- sh2s_sync_on_read(sh2, cycles);
- return sh2_poll_read(a, Pico32x.sh2_regs[4 / 2], cycles, sh2);
- case 0x06/2:
- return (r[a / 2] & ~P32XS_FULL) | 0x4000;
- case 0x08/2: // DREQ src
- case 0x0a/2:
- case 0x0c/2: // DREQ dst
- case 0x0e/2:
- case 0x10/2: // DREQ len
- return r[a / 2];
- case 0x12/2: // DREQ FIFO - does this work on hw?
- if (Pico32x.dmac0_fifo_ptr > 0) {
- Pico32x.dmac0_fifo_ptr--;
- r[a / 2] = Pico32x.dmac_fifo[0];
- memmove(&Pico32x.dmac_fifo[0], &Pico32x.dmac_fifo[1],
- Pico32x.dmac0_fifo_ptr * 2);
- }
- return r[a / 2];
- case 0x14/2:
- case 0x16/2:
- case 0x18/2:
- case 0x1a/2:
- case 0x1c/2:
- return 0; // ?
- case 0x20/2: // comm port
- case 0x22/2:
- case 0x24/2:
- case 0x26/2:
- case 0x28/2:
- case 0x2a/2:
- case 0x2c/2:
- case 0x2e/2:
- p32x_sh2_poll_detect(a, sh2, SH2_STATE_CPOLL, 9);
- cycles = sh2_cycles_done_m68k(sh2);
- sh2s_sync_on_read(sh2, cycles);
- return sh2_poll_read(a, r[a / 2], cycles, sh2);
- case 0x30/2: // PWM
- case 0x32/2:
- case 0x34/2:
- case 0x36/2:
- case 0x38/2:
- case 0x3a/2:
- case 0x3c/2:
- case 0x3e/2:
- return p32x_pwm_read16(a, sh2, sh2_cycles_done_m68k(sh2));
- }
- elprintf_sh2(sh2, EL_32X|EL_ANOMALY,
- "unhandled sysreg r16 [%02x] @%08x", a, sh2_pc(sh2));
- return 0;
- }
- static void p32x_sh2reg_write8(u32 a, u32 d, SH2 *sh2)
- {
- u16 *r = Pico32x.regs;
- u32 old;
- a &= 0x3f;
- sh2->poll_cnt = 0;
- switch (a) {
- case 0x00: // FM
- r[0] &= ~P32XS_FM;
- r[0] |= (d << 8) & P32XS_FM;
- return;
- case 0x01: // HEN/irq masks
- old = Pico32x.sh2irq_mask[sh2->is_slave];
- if ((d ^ old) & 1)
- p32x_pwm_sync_to_sh2(sh2);
- Pico32x.sh2irq_mask[sh2->is_slave] = d & 0x0f;
- Pico32x.sh2_regs[0] &= ~0x80;
- Pico32x.sh2_regs[0] |= d & 0x80;
- if ((d ^ old) & 1)
- p32x_pwm_schedule_sh2(sh2);
- if ((old ^ d) & 2)
- p32x_update_cmd_irq(sh2, 0);
- if ((old ^ d) & 4)
- p32x_schedule_hint(sh2, 0);
- return;
- case 0x04: // ignored?
- return;
- case 0x05: // H count
- d &= 0xff;
- if (Pico32x.sh2_regs[4 / 2] != d) {
- unsigned int cycles = sh2_cycles_done_m68k(sh2);
- Pico32x.sh2_regs[4 / 2] = d;
- p32x_sh2_poll_event(sh2->other_sh2, SH2_STATE_CPOLL, cycles);
- if (p32x_sh2_ready(sh2->other_sh2, cycles+8))
- sh2_end_run(sh2, 4);
- sh2_poll_write(a & ~1, d, cycles, sh2);
- }
- return;
- case 0x20: // comm port
- case 0x21:
- case 0x22:
- case 0x23:
- case 0x24:
- case 0x25:
- case 0x26:
- case 0x27:
- case 0x28:
- case 0x29:
- case 0x2a:
- case 0x2b:
- case 0x2c:
- case 0x2d:
- case 0x2e:
- case 0x2f:
- if (REG8IN16(r, a) != d) {
- unsigned int cycles = sh2_cycles_done_m68k(sh2);
- REG8IN16(r, a) = d;
- p32x_m68k_poll_event(P32XF_68KCPOLL);
- p32x_sh2_poll_event(sh2->other_sh2, SH2_STATE_CPOLL, cycles);
- if (p32x_sh2_ready(sh2->other_sh2, cycles+8))
- sh2_end_run(sh2, 1);
- sh2_poll_write(a & ~1, r[a / 2], cycles, sh2);
- }
- return;
- case 0x30:
- REG8IN16(r, a) = d & 0x0f;
- d = r[0x30 / 2];
- goto pwm_write;
- case 0x31: // PWM control
- REG8IN16(r, a) = d & 0x8f;
- d = r[0x30 / 2];
- goto pwm_write;
- case 0x32: // PWM cycle
- REG8IN16(r, a) = d & 0x0f;
- d = r[0x32 / 2];
- goto pwm_write;
- case 0x33:
- REG8IN16(r, a) = d;
- d = r[0x32 / 2];
- goto pwm_write;
- // PWM pulse regs.. Only writes to odd address send a value
- // to FIFO; reads are 0 (except status bits)
- case 0x34:
- case 0x36:
- case 0x38:
- REG8IN16(r, a) = d;
- return;
- case 0x35:
- case 0x37:
- case 0x39:
- d = (REG8IN16(r, a ^ 1) << 8) | (d & 0xff);
- REG8IN16(r, a ^ 1) = 0;
- goto pwm_write;
- case 0x3a: // ignored, always 0?
- case 0x3b:
- case 0x3c:
- case 0x3d:
- case 0x3e:
- case 0x3f:
- return;
- pwm_write:
- p32x_pwm_write16(a & ~1, d, sh2, sh2_cycles_done_m68k(sh2));
- return;
- }
- elprintf(EL_32X|EL_ANOMALY,
- "unhandled sysreg w8 [%02x] %02x @%08x", a, d, sh2_pc(sh2));
- }
- static void p32x_sh2reg_write16(u32 a, u32 d, SH2 *sh2)
- {
- a &= 0x3e;
- sh2->poll_cnt = 0;
- switch (a/2) {
- case 0x00/2: // FM
- Pico32x.regs[0] &= ~P32XS_FM;
- Pico32x.regs[0] |= d & P32XS_FM;
- break;
- case 0x14/2:
- Pico32x.sh2irqs &= ~P32XI_VRES;
- goto irls;
- case 0x16/2:
- Pico32x.sh2irqi[sh2->is_slave] &= ~P32XI_VINT;
- goto irls;
- case 0x18/2:
- Pico32x.sh2irqi[sh2->is_slave] &= ~P32XI_HINT;
- goto irls;
- case 0x1a/2:
- Pico32x.regs[2 / 2] &= ~(1 << sh2->is_slave);
- p32x_update_cmd_irq(sh2, 0);
- return;
- case 0x1c/2:
- p32x_pwm_sync_to_sh2(sh2);
- Pico32x.sh2irqi[sh2->is_slave] &= ~P32XI_PWM;
- p32x_pwm_schedule_sh2(sh2);
- goto irls;
- case 0x20/2: // comm port
- case 0x22/2:
- case 0x24/2:
- case 0x26/2:
- case 0x28/2:
- case 0x2a/2:
- case 0x2c/2:
- case 0x2e/2:
- if (Pico32x.regs[a / 2] != d) {
- unsigned int cycles = sh2_cycles_done_m68k(sh2);
- Pico32x.regs[a / 2] = d;
- p32x_m68k_poll_event(P32XF_68KCPOLL);
- p32x_sh2_poll_event(sh2->other_sh2, SH2_STATE_CPOLL, cycles);
- if (p32x_sh2_ready(sh2->other_sh2, cycles+8))
- sh2_end_run(sh2, 1);
- sh2_poll_write(a, d, cycles, sh2);
- }
- return;
- case 0x30/2: // PWM
- case 0x32/2:
- case 0x34/2:
- case 0x36/2:
- case 0x38/2:
- case 0x3a/2:
- case 0x3c/2:
- case 0x3e/2:
- p32x_pwm_write16(a, d, sh2, sh2_cycles_done_m68k(sh2));
- return;
- }
- p32x_sh2reg_write8(a | 1, d, sh2);
- return;
- irls:
- p32x_update_irls(sh2, 0);
- }
- // ------------------------------------------------------------------
- // 32x 68k handlers
- // after ADEN
- static u32 PicoRead8_32x_on(u32 a)
- {
- u32 d = 0;
- if ((a & 0xffc0) == 0x5100) { // a15100
- d = p32x_reg_read16(a);
- goto out_16to8;
- }
- if ((a & 0xfc00) != 0x5000) {
- if (PicoIn.AHW & PAHW_MCD)
- return PicoRead8_mcd_io(a);
- else
- return PicoRead8_io(a);
- }
- if ((a & 0xfff0) == 0x5180) { // a15180
- d = p32x_vdp_read16(a);
- goto out_16to8;
- }
- if ((a & 0xfe00) == 0x5200) { // a15200
- d = Pico32xMem->pal[(a & 0x1ff) / 2];
- goto out_16to8;
- }
- if ((a & 0xfffc) == 0x30ec) { // a130ec
- d = str_mars[a & 3];
- goto out;
- }
- elprintf(EL_UIO, "m68k unmapped r8 [%06x] @%06x", a, SekPc);
- return d;
- out_16to8:
- if (a & 1)
- d &= 0xff;
- else
- d >>= 8;
- out:
- elprintf(EL_32X, "m68k 32x r8 [%06x] %02x @%06x", a, d, SekPc);
- return d;
- }
- static u32 PicoRead16_32x_on(u32 a)
- {
- u32 d = 0;
- if ((a & 0xffc0) == 0x5100) { // a15100
- d = p32x_reg_read16(a);
- goto out;
- }
- if ((a & 0xfc00) != 0x5000) {
- if (PicoIn.AHW & PAHW_MCD)
- return PicoRead16_mcd_io(a);
- else
- return PicoRead16_io(a);
- }
- if ((a & 0xfff0) == 0x5180) { // a15180
- d = p32x_vdp_read16(a);
- goto out;
- }
- if ((a & 0xfe00) == 0x5200) { // a15200
- d = Pico32xMem->pal[(a & 0x1ff) / 2];
- goto out;
- }
- if ((a & 0xfffc) == 0x30ec) { // a130ec
- d = !(a & 2) ? ('M'<<8)|'A' : ('R'<<8)|'S';
- goto out;
- }
- elprintf(EL_UIO, "m68k unmapped r16 [%06x] @%06x", a, SekPc);
- return d;
- out:
- elprintf(EL_32X, "m68k 32x r16 [%06x] %04x @%06x", a, d, SekPc);
- return d;
- }
- static void PicoWrite8_32x_on(u32 a, u32 d)
- {
- if ((a & 0xfc00) == 0x5000)
- elprintf(EL_32X, "m68k 32x w8 [%06x] %02x @%06x", a, d & 0xff, SekPc);
- if ((a & 0xffc0) == 0x5100) { // a15100
- p32x_reg_write8(a, d);
- return;
- }
- if ((a & 0xfc00) != 0x5000) {
- m68k_write8_io(a, d);
- return;
- }
- if (!(Pico32x.regs[0] & P32XS_FM)) {
- if ((a & 0xfff0) == 0x5180) { // a15180
- p32x_vdp_write8(a, d);
- return;
- }
- // TODO: verify
- if ((a & 0xfe00) == 0x5200) { // a15200
- elprintf(EL_32X|EL_ANOMALY, "m68k 32x PAL w8 [%06x] %02x @%06x", a, d & 0xff, SekPc);
- ((u8 *)Pico32xMem->pal)[(a & 0x1ff) ^ 1] = d;
- Pico32x.dirty_pal = 1;
- return;
- }
- }
- elprintf(EL_UIO, "m68k unmapped w8 [%06x] %02x @%06x", a, d & 0xff, SekPc);
- }
- static void PicoWrite8_32x_on_io(u32 a, u32 d)
- {
- PicoWrite8_io(a, d);
- if (a == 0xa130f1)
- bank_switch_rom_68k(Pico32x.regs[4 / 2]);
- }
- static void PicoWrite8_32x_on_io_cd(u32 a, u32 d)
- {
- PicoWrite8_mcd_io(a, d);
- if (a == 0xa130f1)
- bank_switch_rom_68k(Pico32x.regs[4 / 2]);
- }
- static void PicoWrite8_32x_on_io_ssf2(u32 a, u32 d)
- {
- carthw_ssf2_write8(a, d);
- if ((a & ~0x0e) == 0xa130f1)
- bank_switch_rom_68k(Pico32x.regs[4 / 2]);
- }
- static void PicoWrite16_32x_on(u32 a, u32 d)
- {
- if ((a & 0xfc00) == 0x5000)
- elprintf(EL_32X, "m68k 32x w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc);
- if ((a & 0xffc0) == 0x5100) { // a15100
- p32x_reg_write16(a, d);
- return;
- }
- if ((a & 0xfc00) != 0x5000) {
- m68k_write16_io(a, d);
- return;
- }
- if (!(Pico32x.regs[0] & P32XS_FM)) {
- if ((a & 0xfff0) == 0x5180) { // a15180
- p32x_vdp_write16(a, d, NULL); // FIXME?
- return;
- }
- if ((a & 0xfe00) == 0x5200) { // a15200
- Pico32xMem->pal[(a & 0x1ff) / 2] = d;
- Pico32x.dirty_pal = 1;
- return;
- }
- }
- elprintf(EL_UIO, "m68k unmapped w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc);
- }
- static void PicoWrite16_32x_on_io(u32 a, u32 d)
- {
- PicoWrite16_io(a, d);
- if (a == 0xa130f0)
- bank_switch_rom_68k(Pico32x.regs[4 / 2]);
- }
- static void PicoWrite16_32x_on_io_cd(u32 a, u32 d)
- {
- PicoWrite16_mcd_io(a, d);
- if (a == 0xa130f0)
- bank_switch_rom_68k(Pico32x.regs[4 / 2]);
- }
- static void PicoWrite16_32x_on_io_ssf2(u32 a, u32 d)
- {
- PicoWrite16_io(a, d);
- if ((a & ~0x0f) == 0xa130f0) {
- carthw_ssf2_write8(a + 1, d);
- bank_switch_rom_68k(Pico32x.regs[4 / 2]);
- }
- }
- // before ADEN
- u32 PicoRead8_32x(u32 a)
- {
- u32 d = 0;
- if (PicoIn.opt & POPT_EN_32X) {
- if ((a & 0xffc0) == 0x5100) { // a15100
- // regs are always readable
- d = ((u8 *)Pico32x.regs)[(a & 0x3f) ^ 1];
- goto out;
- }
- if ((a & 0xfffc) == 0x30ec) { // a130ec
- d = str_mars[a & 3];
- goto out;
- }
- }
- elprintf(EL_UIO, "m68k unmapped r8 [%06x] @%06x", a, SekPc);
- return d;
- out:
- elprintf(EL_32X, "m68k 32x r8 [%06x] %02x @%06x", a, d, SekPc);
- return d;
- }
- u32 PicoRead16_32x(u32 a)
- {
- u32 d = 0;
- if (PicoIn.opt & POPT_EN_32X) {
- if ((a & 0xffc0) == 0x5100) { // a15100
- d = Pico32x.regs[(a & 0x3f) / 2];
- goto out;
- }
- if ((a & 0xfffc) == 0x30ec) { // a130ec
- d = !(a & 2) ? ('M'<<8)|'A' : ('R'<<8)|'S';
- goto out;
- }
- }
- elprintf(EL_UIO, "m68k unmapped r16 [%06x] @%06x", a, SekPc);
- return d;
- out:
- elprintf(EL_32X, "m68k 32x r16 [%06x] %04x @%06x", a, d, SekPc);
- return d;
- }
- void PicoWrite8_32x(u32 a, u32 d)
- {
- if ((PicoIn.opt & POPT_EN_32X) && (a & 0xffc0) == 0x5100) // a15100
- {
- u16 *r = Pico32x.regs;
- elprintf(EL_32X, "m68k 32x w8 [%06x] %02x @%06x", a, d & 0xff, SekPc);
- a &= 0x3f;
- if (a == 1) {
- if ((d ^ r[0]) & d & P32XS_ADEN) {
- Pico32xStartup();
- r[0] &= ~P32XS_nRES; // causes reset if specified by this write
- r[0] |= P32XS_ADEN;
- p32x_reg_write8(a, d); // forward for reset processing
- }
- return;
- }
- // allow only COMM for now
- if ((a & 0x30) == 0x20) {
- u8 *r8 = (u8 *)r;
- r8[a ^ 1] = d;
- }
- return;
- }
- elprintf(EL_UIO, "m68k unmapped w8 [%06x] %02x @%06x", a, d & 0xff, SekPc);
- }
- void PicoWrite16_32x(u32 a, u32 d)
- {
- if ((PicoIn.opt & POPT_EN_32X) && (a & 0xffc0) == 0x5100) // a15100
- {
- u16 *r = Pico32x.regs;
- elprintf(EL_UIO, "m68k 32x w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc);
- a &= 0x3e;
- if (a == 0) {
- if ((d ^ r[0]) & d & P32XS_ADEN) {
- Pico32xStartup();
- r[0] &= ~P32XS_nRES; // causes reset if specified by this write
- r[0] |= P32XS_ADEN;
- p32x_reg_write16(a, d); // forward for reset processing
- }
- return;
- }
- // allow only COMM for now
- if ((a & 0x30) == 0x20)
- r[a / 2] = d;
- return;
- }
- elprintf(EL_UIO, "m68k unmapped w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc);
- }
- /* quirk: in both normal and overwrite areas only nonzero values go through */
- #define sh2_write8_dramN(p, a, d) \
- if ((d & 0xff) != 0) { \
- u8 *dram = (u8 *)p; \
- dram[(a & 0x1ffff) ^ 1] = d; \
- }
- static void m68k_write8_dram0_ow(u32 a, u32 d)
- {
- sh2_write8_dramN(Pico32xMem->dram[0], a, d);
- }
- static void m68k_write8_dram1_ow(u32 a, u32 d)
- {
- sh2_write8_dramN(Pico32xMem->dram[1], a, d);
- }
- #define sh2_write16_dramN(p, a, d) \
- u16 *pd = &((u16 *)p)[(a & 0x1ffff) / 2]; \
- if (!(a & 0x20000)) { \
- *pd = d; \
- } else { \
- u16 v = *pd; /* overwrite */ \
- if (!(d & 0x00ff)) d |= v & 0x00ff; \
- if (!(d & 0xff00)) d |= v & 0xff00; \
- *pd = d; \
- }
- static void m68k_write16_dram0_ow(u32 a, u32 d)
- {
- sh2_write16_dramN(Pico32xMem->dram[0], a, d);
- }
- static void m68k_write16_dram1_ow(u32 a, u32 d)
- {
- sh2_write16_dramN(Pico32xMem->dram[1], a, d);
- }
- // -----------------------------------------------------------------
- // hint vector is writeable
- static void PicoWrite8_hint(u32 a, u32 d)
- {
- if ((a & 0xfffc) == 0x0070) {
- Pico32xMem->m68k_rom[a ^ 1] = d;
- return;
- }
- elprintf(EL_UIO, "m68k unmapped w8 [%06x] %02x @%06x",
- a, d & 0xff, SekPc);
- }
- static void PicoWrite16_hint(u32 a, u32 d)
- {
- if ((a & 0xfffc) == 0x0070) {
- ((u16 *)Pico32xMem->m68k_rom)[a/2] = d;
- return;
- }
- elprintf(EL_UIO, "m68k unmapped w16 [%06x] %04x @%06x",
- a, d & 0xffff, SekPc);
- }
- // normally not writable, but somebody could make a RAM cart
- static void PicoWrite8_cart(u32 a, u32 d)
- {
- elprintf(EL_UIO, "m68k w8 [%06x] %02x @%06x", a, d & 0xff, SekPc);
- a &= 0xfffff;
- m68k_write8(a, d);
- }
- static void PicoWrite16_cart(u32 a, u32 d)
- {
- elprintf(EL_UIO, "m68k w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc);
- a &= 0xfffff;
- m68k_write16(a, d);
- }
- // same with bank, but save ram is sometimes here
- static u32 PicoRead8_bank(u32 a)
- {
- a = (Pico32x.regs[4 / 2] << 20) | (a & 0xfffff);
- return m68k_read8(a);
- }
- static u32 PicoRead16_bank(u32 a)
- {
- a = (Pico32x.regs[4 / 2] << 20) | (a & 0xfffff);
- return m68k_read16(a);
- }
- static void PicoWrite8_bank(u32 a, u32 d)
- {
- if (!(Pico.m.sram_reg & SRR_MAPPED))
- elprintf(EL_UIO, "m68k w8 [%06x] %02x @%06x",
- a, d & 0xff, SekPc);
- a = (Pico32x.regs[4 / 2] << 20) | (a & 0xfffff);
- m68k_write8(a, d);
- }
- static void PicoWrite16_bank(u32 a, u32 d)
- {
- if (!(Pico.m.sram_reg & SRR_MAPPED))
- elprintf(EL_UIO, "m68k w16 [%06x] %04x @%06x",
- a, d & 0xffff, SekPc);
- a = (Pico32x.regs[4 / 2] << 20) | (a & 0xfffff);
- m68k_write16(a, d);
- }
- static void bank_map_handler(void)
- {
- cpu68k_map_set(m68k_read8_map, 0x900000, 0x9fffff, PicoRead8_bank, 1);
- cpu68k_map_set(m68k_read16_map, 0x900000, 0x9fffff, PicoRead16_bank, 1);
- }
- static void bank_switch_rom_68k(int b)
- {
- unsigned int rs, bank, bank2;
- if (Pico.m.ncart_in)
- return;
- bank = b << 20;
- if ((Pico.m.sram_reg & SRR_MAPPED) && bank == Pico.sv.start) {
- bank_map_handler();
- return;
- }
- if (bank >= Pico.romsize) {
- elprintf(EL_32X|EL_ANOMALY, "missing bank @ %06x", bank);
- bank_map_handler();
- return;
- }
- // 32X ROM (XXX: consider mirroring?)
- rs = (Pico.romsize + M68K_BANK_MASK) & ~M68K_BANK_MASK;
- if (!carthw_ssf2_active) {
- rs -= bank;
- if (rs > 0x100000)
- rs = 0x100000;
- cpu68k_map_set(m68k_read8_map, 0x900000, 0x900000 + rs - 1, Pico.rom + bank, 0);
- cpu68k_map_set(m68k_read16_map, 0x900000, 0x900000 + rs - 1, Pico.rom + bank, 0);
- elprintf(EL_32X, "bank %06x-%06x -> %06x", 0x900000, 0x900000 + rs - 1, bank);
- }
- else {
- bank = bank >> 19;
- bank2 = carthw_ssf2_banks[bank + 0] << 19;
- cpu68k_map_set(m68k_read8_map, 0x900000, 0x97ffff, Pico.rom + bank2, 0);
- cpu68k_map_set(m68k_read16_map, 0x900000, 0x97ffff, Pico.rom + bank2, 0);
- bank2 = carthw_ssf2_banks[bank + 1] << 19;
- cpu68k_map_set(m68k_read8_map, 0x980000, 0x9fffff, Pico.rom + bank2, 0);
- cpu68k_map_set(m68k_read16_map, 0x980000, 0x9fffff, Pico.rom + bank2, 0);
- }
- }
- // -----------------------------------------------------------------
- // SH2
- // -----------------------------------------------------------------
- // read8
- static REGPARM(2) u32 sh2_read8_unmapped(u32 a, SH2 *sh2)
- {
- elprintf_sh2(sh2, EL_32X, "unmapped r8 [%08x] %02x @%06x",
- a, 0, sh2_pc(sh2));
- return 0;
- }
- static u32 REGPARM(2) sh2_read8_cs0(u32 a, SH2 *sh2)
- {
- u32 d = 0;
- DRC_SAVE_SR(sh2);
- sh2_burn_cycles(sh2, 1*2);
- // 0x3ffc0 is verified
- if ((a & 0x3ffc0) == 0x4000) {
- d = p32x_sh2reg_read16(a, sh2);
- goto out_16to8;
- }
- if ((a & 0x3fff0) == 0x4100) {
- d = p32x_vdp_read16(a);
- p32x_sh2_poll_detect(a, sh2, SH2_STATE_VPOLL, 9);
- goto out_16to8;
- }
- if ((a & 0x3fe00) == 0x4200) {
- d = Pico32xMem->pal[(a & 0x1ff) / 2];
- goto out_16to8;
- }
- // TODO: mirroring?
- if (!sh2->is_slave && a < sizeof(Pico32xMem->sh2_rom_m))
- d = Pico32xMem->sh2_rom_m.b[a ^ 1];
- else if (sh2->is_slave && a < sizeof(Pico32xMem->sh2_rom_s))
- d = Pico32xMem->sh2_rom_s.b[a ^ 1];
- else
- d = sh2_read8_unmapped(a, sh2);
- goto out;
- out_16to8:
- if (a & 1)
- d &= 0xff;
- else
- d >>= 8;
- out:
- elprintf_sh2(sh2, EL_32X, "r8 [%08x] %02x @%06x",
- a, d, sh2_pc(sh2));
- DRC_RESTORE_SR(sh2);
- return (s8)d;
- }
- // for ssf2
- static u32 REGPARM(2) sh2_read8_rom(u32 a, SH2 *sh2)
- {
- u32 bank = carthw_ssf2_banks[(a >> 19) & 7] << 19;
- s8 *p = sh2->p_rom;
- return p[(bank + (a & 0x7ffff)) ^ 1];
- }
- // read16
- static u32 REGPARM(2) sh2_read16_unmapped(u32 a, SH2 *sh2)
- {
- elprintf_sh2(sh2, EL_32X, "unmapped r16 [%08x] %04x @%06x",
- a, 0, sh2_pc(sh2));
- return 0;
- }
- static u32 REGPARM(2) sh2_read16_cs0(u32 a, SH2 *sh2)
- {
- u32 d = 0;
- DRC_SAVE_SR(sh2);
- sh2_burn_cycles(sh2, 1*2);
- if ((a & 0x3ffc0) == 0x4000) {
- d = p32x_sh2reg_read16(a, sh2);
- if (!(EL_LOGMASK & EL_PWM) && (a & 0x30) == 0x30) // hide PWM
- goto out_noprint;
- goto out;
- }
- if ((a & 0x3fff0) == 0x4100) {
- d = p32x_vdp_read16(a);
- p32x_sh2_poll_detect(a, sh2, SH2_STATE_VPOLL, 9);
- goto out;
- }
- if ((a & 0x3fe00) == 0x4200) {
- d = Pico32xMem->pal[(a & 0x1ff) / 2];
- goto out;
- }
- if (!sh2->is_slave && a < sizeof(Pico32xMem->sh2_rom_m))
- d = Pico32xMem->sh2_rom_m.w[a / 2];
- else if (sh2->is_slave && a < sizeof(Pico32xMem->sh2_rom_s))
- d = Pico32xMem->sh2_rom_s.w[a / 2];
- else
- d = sh2_read16_unmapped(a, sh2);
- out:
- elprintf_sh2(sh2, EL_32X, "r16 [%08x] %04x @%06x",
- a, d, sh2_pc(sh2));
- out_noprint:
- DRC_RESTORE_SR(sh2);
- return (s16)d;
- }
- static u32 REGPARM(2) sh2_read16_rom(u32 a, SH2 *sh2)
- {
- u32 bank = carthw_ssf2_banks[(a >> 19) & 7] << 19;
- s16 *p = sh2->p_rom;
- return p[(bank + (a & 0x7fffe)) / 2];
- }
- static u32 REGPARM(2) sh2_read32_unmapped(u32 a, SH2 *sh2)
- {
- elprintf_sh2(sh2, EL_32X, "unmapped r32 [%08x] %08x @%06x",
- a, 0, sh2_pc(sh2));
- return 0;
- }
- static u32 REGPARM(2) sh2_read32_cs0(u32 a, SH2 *sh2)
- {
- u32 d1 = sh2_read16_cs0(a, sh2) << 16, d2 = sh2_read16_cs0(a + 2, sh2) << 16;
- return d1 | (d2 >> 16);
- }
- static u32 REGPARM(2) sh2_read32_rom(u32 a, SH2 *sh2)
- {
- u32 bank = carthw_ssf2_banks[(a >> 19) & 7] << 19;
- u32 *p = sh2->p_rom;
- u32 d = p[(bank + (a & 0x7fffc)) / 4];
- return (d << 16) | (d >> 16);
- }
- // writes
- #ifdef DRC_SH2
- static void sh2_sdram_poll(u32 a, u32 d, SH2 *sh2)
- {
- unsigned cycles;
- DRC_SAVE_SR(sh2);
- cycles = sh2_cycles_done_m68k(sh2);
- sh2_poll_write(a, d, cycles, sh2);
- p32x_sh2_poll_event(sh2->other_sh2, SH2_STATE_RPOLL, cycles);
- if (p32x_sh2_ready(sh2->other_sh2, cycles+8))
- sh2_end_run(sh2, 1);
- DRC_RESTORE_SR(sh2);
- }
- void sh2_sdram_checks(u32 a, u32 d, SH2 *sh2, u32 t)
- {
- if (t & 0x80) sh2_sdram_poll(a, d, sh2);
- if (t & 0x7f) sh2_drc_wcheck_ram(a, 2, sh2);
- }
- void sh2_sdram_checks_l(u32 a, u32 d, SH2 *sh2, u32 t)
- {
- if (t & 0x000080) sh2_sdram_poll(a, d>>16, sh2);
- if (t & 0x800000) sh2_sdram_poll(a+2, d, sh2);
- if (t & ~0x800080) sh2_drc_wcheck_ram(a, 4, sh2);
- }
- #ifndef _ASM_32X_MEMORY_C
- static void sh2_da_checks(u32 a, u32 t, SH2 *sh2)
- {
- sh2_drc_wcheck_da(a, 2, sh2);
- }
- static void sh2_da_checks_l(u32 a, u32 t, SH2 *sh2)
- {
- sh2_drc_wcheck_da(a, 4, sh2);
- }
- #endif
- #endif
- static void REGPARM(3) sh2_write_ignore(u32 a, u32 d, SH2 *sh2)
- {
- }
- // write8
- static void REGPARM(3) sh2_write8_unmapped(u32 a, u32 d, SH2 *sh2)
- {
- elprintf_sh2(sh2, EL_32X, "unmapped w8 [%08x] %02x @%06x",
- a, d & 0xff, sh2_pc(sh2));
- }
- static void REGPARM(3) sh2_write8_cs0(u32 a, u32 d, SH2 *sh2)
- {
- DRC_SAVE_SR(sh2);
- elprintf_sh2(sh2, EL_32X, "w8 [%08x] %02x @%06x",
- a, d & 0xff, sh2_pc(sh2));
- if ((a & 0x3ffc0) == 0x4000) {
- p32x_sh2reg_write8(a, d, sh2);
- goto out;
- }
- if (Pico32x.regs[0] & P32XS_FM) {
- if ((a & 0x3fff0) == 0x4100) {
- sh2->poll_cnt = 0;
- p32x_vdp_write8(a, d);
- goto out;
- }
- if ((a & 0x3fe00) == 0x4200) {
- sh2->poll_cnt = 0;
- ((u8 *)Pico32xMem->pal)[(a & 0x1ff) ^ 1] = d;
- Pico32x.dirty_pal = 1;
- goto out;
- }
- }
- sh2_write8_unmapped(a, d, sh2);
- out:
- DRC_RESTORE_SR(sh2);
- }
- #ifdef _ASM_32X_MEMORY_C
- extern void REGPARM(3) sh2_write8_dram(u32 a, u32 d, SH2 *sh2);
- extern void REGPARM(3) sh2_write8_sdram(u32 a, u32 d, SH2 *sh2);
- extern void REGPARM(3) sh2_write8_da(u32 a, u32 d, SH2 *sh2);
- #else
- static void REGPARM(3) sh2_write8_dram(u32 a, u32 d, SH2 *sh2)
- {
- sh2_write8_dramN(sh2->p_dram, a, d);
- }
- static void REGPARM(3) sh2_write8_sdram(u32 a, u32 d, SH2 *sh2)
- {
- u32 a1 = (a & 0x3ffff) ^ 1;
- ((u8 *)sh2->p_sdram)[a1] = d;
- #ifdef DRC_SH2
- u8 *p = sh2->p_drcblk_ram;
- u32 t = p[a1 >> SH2_DRCBLK_RAM_SHIFT];
- if (t)
- sh2_sdram_checks(a & ~1, ((u16 *)sh2->p_sdram)[a1 / 2], sh2, t);
- #endif
- }
- static void REGPARM(3) sh2_write8_da(u32 a, u32 d, SH2 *sh2)
- {
- u32 a1 = (a & 0xfff) ^ 1;
- sh2->data_array[a1] = d;
- #ifdef DRC_SH2
- u8 *p = sh2->p_drcblk_da;
- u32 t = p[a1 >> SH2_DRCBLK_DA_SHIFT];
- if (t)
- sh2_da_checks(a, t, sh2);
- #endif
- }
- #endif
- // write16
- static void REGPARM(3) sh2_write16_unmapped(u32 a, u32 d, SH2 *sh2)
- {
- elprintf_sh2(sh2, EL_32X, "unmapped w16 [%08x] %04x @%06x",
- a, d & 0xffff, sh2_pc(sh2));
- }
- static void REGPARM(3) sh2_write16_cs0(u32 a, u32 d, SH2 *sh2)
- {
- DRC_SAVE_SR(sh2);
- if (((EL_LOGMASK & EL_PWM) || (a & 0x30) != 0x30)) // hide PWM
- elprintf_sh2(sh2, EL_32X, "w16 [%08x] %04x @%06x",
- a, d & 0xffff, sh2_pc(sh2));
- if ((a & 0x3ffc0) == 0x4000) {
- p32x_sh2reg_write16(a, d, sh2);
- goto out;
- }
- if (Pico32x.regs[0] & P32XS_FM) {
- if ((a & 0x3fff0) == 0x4100) {
- sh2->poll_cnt = 0;
- p32x_vdp_write16(a, d, sh2);
- goto out;
- }
- if ((a & 0x3fe00) == 0x4200) {
- sh2->poll_cnt = 0;
- Pico32xMem->pal[(a & 0x1ff) / 2] = d;
- Pico32x.dirty_pal = 1;
- goto out;
- }
- }
- sh2_write16_unmapped(a, d, sh2);
- out:
- DRC_RESTORE_SR(sh2);
- }
- #ifdef _ASM_32X_MEMORY_C
- extern void REGPARM(3) sh2_write16_dram(u32 a, u32 d, SH2 *sh2);
- extern void REGPARM(3) sh2_write16_sdram(u32 a, u32 d, SH2 *sh2);
- extern void REGPARM(3) sh2_write16_da(u32 a, u32 d, SH2 *sh2);
- #else
- static void REGPARM(3) sh2_write16_dram(u32 a, u32 d, SH2 *sh2)
- {
- sh2_write16_dramN(sh2->p_dram, a, d);
- }
- static void REGPARM(3) sh2_write16_sdram(u32 a, u32 d, SH2 *sh2)
- {
- u32 a1 = a & 0x3fffe;
- ((u16 *)sh2->p_sdram)[a1 / 2] = d;
- #ifdef DRC_SH2
- u8 *p = sh2->p_drcblk_ram;
- u32 t = p[a1 >> SH2_DRCBLK_RAM_SHIFT];
- if (t)
- sh2_sdram_checks(a, d, sh2, t);
- #endif
- }
- static void REGPARM(3) sh2_write16_da(u32 a, u32 d, SH2 *sh2)
- {
- u32 a1 = a & 0xffe;
- ((u16 *)sh2->data_array)[a1 / 2] = d;
- #ifdef DRC_SH2
- u8 *p = sh2->p_drcblk_da;
- u32 t = p[a1 >> SH2_DRCBLK_DA_SHIFT];
- if (t)
- sh2_da_checks(a, t, sh2);
- #endif
- }
- #endif
- static void REGPARM(3) sh2_write16_rom(u32 a, u32 d, SH2 *sh2)
- {
- u32 a1 = a & 0x3ffffe;
- // tweak for WWF Raw: does writes to ROM area, and it doesn't work without
- // allowing this.
- // Presumably the write goes to the CPU cache and is read back from there,
- // but it would be extremely costly to emulate cache behaviour. Just allow
- // writes to that region, hoping that the original ROM values are never used.
- if ((a1 & 0x3e0000) == 0x3e0000)
- ((u16 *)sh2->p_rom)[a1 / 2] = d;
- else
- sh2_write16_unmapped(a, d, sh2);
- }
- static void REGPARM(3) sh2_write32_unmapped(u32 a, u32 d, SH2 *sh2)
- {
- elprintf_sh2(sh2, EL_32X, "unmapped w32 [%08x] %08x @%06x",
- a, d, sh2_pc(sh2));
- }
- static void REGPARM(3) sh2_write32_cs0(u32 a, u32 d, SH2 *sh2)
- {
- sh2_write16_cs0(a, d >> 16, sh2);
- sh2_write16_cs0(a + 2, d, sh2);
- }
- #define sh2_write32_dramN(p, a, d) \
- u32 *pd = &((u32 *)p)[(a & 0x1ffff) / 4]; \
- if (!(a & 0x20000)) { \
- *pd = (d << 16) | (d >> 16); \
- } else { \
- /* overwrite */ \
- u32 v = *pd, m = 0; d = (d << 16) | (d >> 16) ; \
- if (!(d & 0x000000ff)) m |= 0x000000ff; \
- if (!(d & 0x0000ff00)) m |= 0x0000ff00; \
- if (!(d & 0x00ff0000)) m |= 0x00ff0000; \
- if (!(d & 0xff000000)) m |= 0xff000000; \
- *pd = d | (v&m); \
- }
- #ifdef _ASM_32X_MEMORY_C
- extern void REGPARM(3) sh2_write32_dram(u32 a, u32 d, SH2 *sh2);
- extern void REGPARM(3) sh2_write32_sdram(u32 a, u32 d, SH2 *sh2);
- extern void REGPARM(3) sh2_write32_da(u32 a, u32 d, SH2 *sh2);
- #else
- static void REGPARM(3) sh2_write32_dram(u32 a, u32 d, SH2 *sh2)
- {
- sh2_write32_dramN(sh2->p_dram, a, d);
- }
- static void REGPARM(3) sh2_write32_sdram(u32 a, u32 d, SH2 *sh2)
- {
- u32 a1 = a & 0x3fffc;
- *(u32 *)((char*)sh2->p_sdram + a1) = (d << 16) | (d >> 16);
- #ifdef DRC_SH2
- u8 *p = sh2->p_drcblk_ram;
- u32 t = p[a1 >> SH2_DRCBLK_RAM_SHIFT];
- u32 u = p[(a1+2) >> SH2_DRCBLK_RAM_SHIFT];
- if (t|(u<<16))
- sh2_sdram_checks_l(a, d, sh2, t|(u<<16));
- #endif
- }
- static void REGPARM(3) sh2_write32_da(u32 a, u32 d, SH2 *sh2)
- {
- u32 a1 = a & 0xffc;
- *((u32 *)sh2->data_array + a1/4) = (d << 16) | (d >> 16);
- #ifdef DRC_SH2
- u8 *p = sh2->p_drcblk_da;
- u32 t = p[a1 >> SH2_DRCBLK_DA_SHIFT];
- u32 u = p[(a1+2) >> SH2_DRCBLK_DA_SHIFT];
- if (t|(u<<16))
- sh2_da_checks_l(a, t|(u<<16), sh2);
- #endif
- }
- #endif
- static void REGPARM(3) sh2_write32_rom(u32 a, u32 d, SH2 *sh2)
- {
- sh2_write16_rom(a, d >> 16, sh2);
- sh2_write16_rom(a + 2, d, sh2);
- }
- typedef u32 (sh2_read_handler)(u32 a, SH2 *sh2);
- typedef void REGPARM(3) (sh2_write_handler)(u32 a, u32 d, SH2 *sh2);
- #define SH2MAP_ADDR2OFFS_R(a) \
- ((u32)(a) >> SH2_READ_SHIFT)
- #define SH2MAP_ADDR2OFFS_W(a) \
- ((u32)(a) >> SH2_WRITE_SHIFT)
- u32 REGPARM(2) p32x_sh2_read8(u32 a, SH2 *sh2)
- {
- const sh2_memmap *sh2_map = sh2->read8_map;
- uptr p;
- sh2_map += SH2MAP_ADDR2OFFS_R(a);
- p = sh2_map->addr;
- if (!map_flag_set(p))
- return *(s8 *)((p << 1) + ((a & sh2_map->mask) ^ 1));
- else
- return ((sh2_read_handler *)(p << 1))(a, sh2);
- }
- u32 REGPARM(2) p32x_sh2_read16(u32 a, SH2 *sh2)
- {
- const sh2_memmap *sh2_map = sh2->read16_map;
- uptr p;
- sh2_map += SH2MAP_ADDR2OFFS_R(a);
- p = sh2_map->addr;
- if (!map_flag_set(p))
- return *(s16 *)((p << 1) + (a & sh2_map->mask));
- else
- return ((sh2_read_handler *)(p << 1))(a, sh2);
- }
- u32 REGPARM(2) p32x_sh2_read32(u32 a, SH2 *sh2)
- {
- const sh2_memmap *sh2_map = sh2->read32_map;
- uptr p;
- sh2_map += SH2MAP_ADDR2OFFS_R(a);
- p = sh2_map->addr;
- if (!map_flag_set(p)) {
- u32 *pd = (u32 *)((p << 1) + (a & sh2_map->mask));
- return (*pd << 16) | (*pd >> 16);
- } else
- return ((sh2_read_handler *)(p << 1))(a, sh2);
- }
- void REGPARM(3) p32x_sh2_write8(u32 a, u32 d, SH2 *sh2)
- {
- const void **sh2_wmap = sh2->write8_tab;
- sh2_write_handler *wh;
- wh = sh2_wmap[SH2MAP_ADDR2OFFS_W(a)];
- wh(a, d, sh2);
- }
- void REGPARM(3) p32x_sh2_write16(u32 a, u32 d, SH2 *sh2)
- {
- const void **sh2_wmap = sh2->write16_tab;
- sh2_write_handler *wh;
- wh = sh2_wmap[SH2MAP_ADDR2OFFS_W(a)];
- wh(a, d, sh2);
- }
- void REGPARM(3) p32x_sh2_write32(u32 a, u32 d, SH2 *sh2)
- {
- const void **sh2_wmap = sh2->write32_tab;
- sh2_write_handler *wh;
- wh = sh2_wmap[SH2MAP_ADDR2OFFS_W(a)];
- wh(a, d, sh2);
- }
- void *p32x_sh2_get_mem_ptr(u32 a, u32 *mask, SH2 *sh2)
- {
- const sh2_memmap *mm = sh2->read8_map;
- void *ret = (void *)-1;
- mm += SH2MAP_ADDR2OFFS_R(a);
- if (!map_flag_set(mm->addr)) {
- // directly mapped memory (SDRAM, ROM, data array)
- ret = (void *)(mm->addr << 1);
- *mask = mm->mask;
- } else if ((a & ~0x7ff) == 0) {
- // BIOS, has handler function since it shares its segment with I/O
- ret = sh2->p_bios;
- *mask = 0x7ff;
- } else if ((a & 0xc6000000) == 0x02000000) {
- // banked ROM. Return bank address
- u32 bank = carthw_ssf2_banks[(a >> 19) & 7] << 19;
- ret = (char*)sh2->p_rom + bank;
- *mask = 0x07ffff;
- }
- return ret;
- }
- int p32x_sh2_memcpy(u32 dst, u32 src, int count, int size, SH2 *sh2)
- {
- u32 mask;
- u8 *ps, *pd;
- int len, i;
- // check if src and dst points to memory (rom/sdram/dram/da)
- if ((pd = p32x_sh2_get_mem_ptr(dst, &mask, sh2)) == (void *)-1)
- return 0;
- if ((ps = p32x_sh2_get_mem_ptr(src, &mask, sh2)) == (void *)-1)
- return 0;
- ps += src & mask;
- len = count * size;
- // DRAM in byte access is always in overwrite mode
- if (pd == sh2->p_dram && size == 1)
- dst |= 0x20000;
- // align dst to halfword
- if (dst & 1) {
- p32x_sh2_write8(dst, *(u8 *)((uptr)ps ^ 1), sh2);
- ps++, dst++, len --;
- }
- // copy data
- if ((uptr)ps & 1) {
- // unaligned, use halfword copy mode to reduce memory bandwidth
- u16 *sp = (u16 *)(ps - 1);
- u16 dl, dh = *sp++;
- for (i = 0; i < (len & ~1); i += 2, dst += 2, sp++) {
- dl = dh, dh = *sp;
- p32x_sh2_write16(dst, (dh >> 8) | (dl << 8), sh2);
- }
- if (len & 1)
- p32x_sh2_write8(dst, dh, sh2);
- } else {
- // dst and src at least halfword aligned
- u16 *sp = (u16 *)ps;
- // align dst to word
- if ((dst & 2) && len >= 2) {
- p32x_sh2_write16(dst, *sp++, sh2);
- dst += 2, len -= 2;
- }
- if ((uptr)sp & 2) {
- // halfword copy, using word writes to reduce memory bandwidth
- u16 dl, dh;
- for (i = 0; i < (len & ~3); i += 4, dst += 4, sp += 2) {
- dl = sp[0], dh = sp[1];
- p32x_sh2_write32(dst, (dl << 16) | dh, sh2);
- }
- } else {
- // word copy
- u32 d;
- for (i = 0; i < (len & ~3); i += 4, dst += 4, sp += 2) {
- d = *(u32 *)sp;
- p32x_sh2_write32(dst, (d << 16) | (d >> 16), sh2);
- }
- }
- if (len & 2) {
- p32x_sh2_write16(dst, *sp++, sh2);
- dst += 2;
- }
- if (len & 1)
- p32x_sh2_write8(dst, *sp >> 8, sh2);
- }
- return count;
- }
- // -----------------------------------------------------------------
- static void z80_md_bank_write_32x(u32 a, unsigned char d)
- {
- u32 addr68k;
- addr68k = Pico.m.z80_bank68k << 15;
- addr68k += a & 0x7fff;
- if ((addr68k & 0xfff000) == 0xa15000)
- Pico32x.emu_flags |= P32XF_Z80_32X_IO;
- elprintf(EL_Z80BNK, "z80->68k w8 [%06x] %02x", addr68k, d);
- m68k_write8(addr68k, d);
- }
- // -----------------------------------------------------------------
- static const u16 msh2_code[] = {
- // trap instructions
- 0xaffe, // 200 bra <self>
- 0x0009, // 202 nop
- // have to wait a bit until m68k initial program finishes clearing stuff
- // to avoid races with game SH2 code, like in Tempo
- 0xd406, // 204 mov.l @(_m_ok,pc), r4
- 0xc400, // 206 mov.b @(h'0,gbr),r0
- 0xc801, // 208 tst #1, r0
- 0x8b0f, // 20a bf cd_start
- 0xd105, // 20c mov.l @(_cnt,pc), r1
- 0xd206, // 20e mov.l @(_start,pc), r2
- 0x71ff, // 210 add #-1, r1
- 0x4115, // 212 cmp/pl r1
- 0x89fc, // 214 bt -2
- 0x6043, // 216 mov r4, r0
- 0xc208, // 218 mov.l r0, @(h'20,gbr)
- 0x6822, // 21a mov.l @r2, r8
- 0x482b, // 21c jmp @r8
- 0x0009, // 21e nop
- ('M'<<8)|'_', ('O'<<8)|'K', // 220 _m_ok
- 0x0001, 0x0000, // 224 _cnt
- 0x2200, 0x03e0, // master start pointer in ROM
- // cd_start:
- 0xd20d, // 22c mov.l @(__cd_,pc), r2
- 0xc608, // 22e mov.l @(h'20,gbr), r0
- 0x3200, // 230 cmp/eq r0, r2
- 0x8bfc, // 232 bf #-2
- 0xe000, // 234 mov #0, r0
- 0xcf80, // 236 or.b #0x80,@(r0,gbr)
- 0xd80b, // 238 mov.l @(_start_cd,pc), r8 // 24000018
- 0xd30c, // 23a mov.l @(_max_len,pc), r3
- 0x5b84, // 23c mov.l @(h'10,r8), r11 // master vbr
- 0x5a82, // 23e mov.l @(8,r8), r10 // entry
- 0x5081, // 240 mov.l @(4,r8), r0 // len
- 0x5980, // 242 mov.l @(0,r8), r9 // dst
- 0x3036, // 244 cmp/hi r3,r0
- 0x8b00, // 246 bf #1
- 0x6033, // 248 mov r3,r0
- 0x7820, // 24a add #0x20, r8
- // ipl_copy:
- 0x6286, // 24c mov.l @r8+, r2
- 0x2922, // 24e mov.l r2, @r9
- 0x7904, // 250 add #4, r9
- 0x70fc, // 252 add #-4, r0
- 0x8800, // 254 cmp/eq #0, r0
- 0x8bf9, // 256 bf #-5
- //
- 0x4b2e, // 258 ldc r11, vbr
- 0x6043, // 25a mov r4, r0 // M_OK
- 0xc208, // 25c mov.l r0, @(h'20,gbr)
- 0x4a2b, // 25e jmp @r10
- 0x0009, // 260 nop
- 0x0009, // 262 nop // pad
- ('_'<<8)|'C', ('D'<<8)|'_', // 264 __cd_
- 0x2400, 0x0018, // 268 _start_cd
- 0x0001, 0xffe0, // 26c _max_len
- };
- static const u16 ssh2_code[] = {
- 0xaffe, // 200 bra <self>
- 0x0009, // 202 nop
- // code to wait for master, in case authentic master BIOS is used
- 0xd106, // 204 mov.l @(_m_ok,pc), r1
- 0xd208, // 206 mov.l @(_start,pc), r2
- 0xc608, // 208 mov.l @(h'20,gbr), r0
- 0x3100, // 20a cmp/eq r0, r1
- 0x8bfc, // 20c bf #-2
- 0xc400, // 20e mov.b @(h'0,gbr),r0
- 0xc801, // 210 tst #1, r0
- 0xd004, // 212 mov.l @(_s_ok,pc), r0
- 0x8b0a, // 214 bf cd_start
- 0xc209, // 216 mov.l r0, @(h'24,gbr)
- 0x6822, // 218 mov.l @r2, r8
- 0x482b, // 21a jmp @r8
- 0x0009, // 21c nop
- 0x0009, // 21e nop
- ('M'<<8)|'_', ('O'<<8)|'K', // 220
- ('S'<<8)|'_', ('O'<<8)|'K', // 224
- 0x2200, 0x03e4, // slave start pointer in ROM
- // cd_start:
- 0xd803, // 22c mov.l @(_start_cd,pc), r8 // 24000018
- 0x5b85, // 22e mov.l @(h'14,r8), r11 // slave vbr
- 0x5a83, // 230 mov.l @(h'0c,r8), r10 // entry
- 0x4b2e, // 232 ldc r11, vbr
- 0xc209, // 234 mov.l r0, @(h'24,gbr) // write S_OK
- 0x4a2b, // 236 jmp @r10
- 0x0009, // 238 nop
- 0x0009, // 23a nop
- 0x2400, 0x0018, // 23c _start_cd
- };
- #define HWSWAP(x) (((u16)(x) << 16) | ((x) >> 16))
- static void get_bios(void)
- {
- u16 *ps;
- u32 *pl;
- int i;
- // M68K ROM
- if (p32x_bios_g != NULL) {
- elprintf(EL_STATUS|EL_32X, "32x: using supplied 68k BIOS");
- Byteswap(Pico32xMem->m68k_rom, p32x_bios_g, sizeof(Pico32xMem->m68k_rom));
- }
- else {
- static const u16 andb[] = { 0x0239, 0x00fe, 0x00a1, 0x5107 };
- static const u16 p_d4[] = {
- 0x48e7, 0x8040, // movem.l d0/a1, -(sp)
- 0x227c, 0x00a1, 0x30f1, // movea.l #0xa130f1, a1
- 0x7007, // moveq.l #7, d0
- 0x12d8, //0: move.b (a0)+, (a1)+
- 0x5289, // addq.l #1, a1
- 0x51c8, 0xfffa, // dbra d0, 0b
- 0x0239, 0x00fe, 0x00a1, // and.b #0xfe, (0xa15107).l
- 0x5107,
- 0x4cdf, 0x0201 // movem.l (sp)+, d0/a1
- };
- // generate 68k ROM
- ps = (u16 *)Pico32xMem->m68k_rom;
- pl = (u32 *)ps;
- for (i = 1; i < 0xc0/4; i++)
- pl[i] = HWSWAP(0x880200 + (i - 1) * 6);
- pl[0x70/4] = 0;
- // fill with nops
- for (i = 0xc0/2; i < 0x100/2; i++)
- ps[i] = 0x4e71;
- // c0: don't need to care about RV - not emulated
- ps[0xc8/2] = 0x1280; // move.b d0, (a1)
- memcpy(ps + 0xca/2, andb, sizeof(andb)); // and.b #0xfe, (a15107)
- ps[0xd2/2] = 0x4e75; // rts
- // d4:
- memcpy(ps + 0xd4/2, p_d4, sizeof(p_d4));
- ps[0xfe/2] = 0x4e75; // rts
- }
- // fill remaining m68k_rom page with game ROM
- memcpy(Pico32xMem->m68k_rom_bank + sizeof(Pico32xMem->m68k_rom),
- Pico.rom + sizeof(Pico32xMem->m68k_rom),
- sizeof(Pico32xMem->m68k_rom_bank) - sizeof(Pico32xMem->m68k_rom));
- // MSH2
- if (p32x_bios_m != NULL) {
- elprintf(EL_STATUS|EL_32X, "32x: using supplied master SH2 BIOS");
- Byteswap(&Pico32xMem->sh2_rom_m, p32x_bios_m, sizeof(Pico32xMem->sh2_rom_m));
- }
- else {
- pl = (u32 *)&Pico32xMem->sh2_rom_m;
- // fill exception vector table to our trap address
- for (i = 0; i < 128; i++)
- pl[i] = HWSWAP(0x200);
- // start
- pl[0] = pl[2] = HWSWAP(0x204);
- // reset SP
- pl[1] = pl[3] = HWSWAP(0x6040000);
- // startup code
- memcpy(&Pico32xMem->sh2_rom_m.b[0x200], msh2_code, sizeof(msh2_code));
- }
- // SSH2
- if (p32x_bios_s != NULL) {
- elprintf(EL_STATUS|EL_32X, "32x: using supplied slave SH2 BIOS");
- Byteswap(&Pico32xMem->sh2_rom_s, p32x_bios_s, sizeof(Pico32xMem->sh2_rom_s));
- }
- else {
- pl = (u32 *)&Pico32xMem->sh2_rom_s;
- // fill exception vector table to our trap address
- for (i = 0; i < 128; i++)
- pl[i] = HWSWAP(0x200);
- // start
- pl[0] = pl[2] = HWSWAP(0x204);
- // reset SP
- pl[1] = pl[3] = HWSWAP(0x603f800);
- // startup code
- memcpy(&Pico32xMem->sh2_rom_s.b[0x200], ssh2_code, sizeof(ssh2_code));
- }
- }
- #define MAP_MEMORY(m) ((uptr)(m) >> 1)
- #define MAP_HANDLER(h) ( ((uptr)(h) >> 1) | ((uptr)1 << (sizeof(uptr) * 8 - 1)) )
- static sh2_memmap msh2_read8_map[0x80], msh2_read16_map[0x80], msh2_read32_map[0x80];
- static sh2_memmap ssh2_read8_map[0x80], ssh2_read16_map[0x80], ssh2_read32_map[0x80];
- // for writes we are using handlers only
- static sh2_write_handler *msh2_write8_map[0x80], *msh2_write16_map[0x80], *msh2_write32_map[0x80];
- static sh2_write_handler *ssh2_write8_map[0x80], *ssh2_write16_map[0x80], *ssh2_write32_map[0x80];
- void Pico32xSwapDRAM(int b)
- {
- cpu68k_map_set(m68k_read8_map, 0x840000, 0x85ffff, Pico32xMem->dram[b], 0);
- cpu68k_map_set(m68k_read16_map, 0x840000, 0x85ffff, Pico32xMem->dram[b], 0);
- cpu68k_map_set(m68k_read8_map, 0x860000, 0x87ffff, Pico32xMem->dram[b], 0);
- cpu68k_map_set(m68k_read16_map, 0x860000, 0x87ffff, Pico32xMem->dram[b], 0);
- cpu68k_map_set(m68k_write8_map, 0x840000, 0x87ffff,
- b ? m68k_write8_dram1_ow : m68k_write8_dram0_ow, 1);
- cpu68k_map_set(m68k_write16_map, 0x840000, 0x87ffff,
- b ? m68k_write16_dram1_ow : m68k_write16_dram0_ow, 1);
- // SH2
- msh2_read8_map[0x04/2].addr = msh2_read8_map[0x24/2].addr =
- msh2_read16_map[0x04/2].addr = msh2_read16_map[0x24/2].addr =
- msh2_read32_map[0x04/2].addr = msh2_read32_map[0x24/2].addr = MAP_MEMORY(Pico32xMem->dram[b]);
- ssh2_read8_map[0x04/2].addr = ssh2_read8_map[0x24/2].addr =
- ssh2_read16_map[0x04/2].addr = ssh2_read16_map[0x24/2].addr =
- ssh2_read32_map[0x04/2].addr = ssh2_read32_map[0x24/2].addr = MAP_MEMORY(Pico32xMem->dram[b]);
- // convenience ptrs
- msh2.p_dram = ssh2.p_dram = Pico32xMem->dram[b];
- }
- static void bank_switch_rom_sh2(void)
- {
- if (!carthw_ssf2_active) {
- // easy
- msh2_read8_map[0x02/2].addr = msh2_read8_map[0x22/2].addr =
- msh2_read16_map[0x02/2].addr = msh2_read16_map[0x22/2].addr =
- msh2_read32_map[0x02/2].addr = msh2_read32_map[0x22/2].addr = MAP_MEMORY(Pico.rom);
- ssh2_read8_map[0x02/2].addr = ssh2_read8_map[0x22/2].addr =
- ssh2_read16_map[0x02/2].addr = ssh2_read16_map[0x22/2].addr =
- ssh2_read32_map[0x02/2].addr = ssh2_read32_map[0x22/2].addr = MAP_MEMORY(Pico.rom);
- }
- else {
- msh2_read8_map[0x02/2].addr = msh2_read8_map[0x22/2].addr = MAP_HANDLER(sh2_read8_rom);
- msh2_read16_map[0x02/2].addr = msh2_read16_map[0x22/2].addr = MAP_HANDLER(sh2_read16_rom);
- msh2_read32_map[0x02/2].addr = msh2_read32_map[0x22/2].addr = MAP_HANDLER(sh2_read32_rom);
- ssh2_read8_map[0x02/2].addr = ssh2_read8_map[0x22/2].addr = MAP_HANDLER(sh2_read8_rom);
- ssh2_read16_map[0x02/2].addr = ssh2_read16_map[0x22/2].addr = MAP_HANDLER(sh2_read16_rom);
- ssh2_read32_map[0x02/2].addr = ssh2_read32_map[0x22/2].addr = MAP_HANDLER(sh2_read32_rom);
- }
- }
- void PicoMemSetup32x(void)
- {
- unsigned int rs;
- int i;
- Pico32xMem = plat_mmap(0x06000000, sizeof(*Pico32xMem), 0, 0);
- if (Pico32xMem == NULL) {
- elprintf(EL_STATUS, "OOM");
- return;
- }
- get_bios();
- // cartridge area becomes unmapped
- // XXX: we take the easy way and don't unmap ROM,
- // so that we can avoid handling the RV bit.
- // m68k_map_unmap(0x000000, 0x3fffff);
- if (!Pico.m.ncart_in) {
- // MD ROM area
- rs = sizeof(Pico32xMem->m68k_rom_bank);
- cpu68k_map_set(m68k_read8_map, 0x000000, rs - 1, Pico32xMem->m68k_rom_bank, 0);
- cpu68k_map_set(m68k_read16_map, 0x000000, rs - 1, Pico32xMem->m68k_rom_bank, 0);
- cpu68k_map_set(m68k_write8_map, 0x000000, rs - 1, PicoWrite8_hint, 1); // TODO verify
- cpu68k_map_set(m68k_write16_map, 0x000000, rs - 1, PicoWrite16_hint, 1);
- // 32X ROM (unbanked, XXX: consider mirroring?)
- rs = (Pico.romsize + M68K_BANK_MASK) & ~M68K_BANK_MASK;
- if (rs > 0x80000)
- rs = 0x80000;
- cpu68k_map_set(m68k_read8_map, 0x880000, 0x880000 + rs - 1, Pico.rom, 0);
- cpu68k_map_set(m68k_read16_map, 0x880000, 0x880000 + rs - 1, Pico.rom, 0);
- cpu68k_map_set(m68k_write8_map, 0x880000, 0x880000 + rs - 1, PicoWrite8_cart, 1);
- cpu68k_map_set(m68k_write16_map, 0x880000, 0x880000 + rs - 1, PicoWrite16_cart, 1);
- // 32X ROM (banked)
- bank_switch_rom_68k(0);
- cpu68k_map_set(m68k_write8_map, 0x900000, 0x9fffff, PicoWrite8_bank, 1);
- cpu68k_map_set(m68k_write16_map, 0x900000, 0x9fffff, PicoWrite16_bank, 1);
- }
- // SYS regs
- cpu68k_map_set(m68k_read8_map, 0xa10000, 0xa1ffff, PicoRead8_32x_on, 1);
- cpu68k_map_set(m68k_read16_map, 0xa10000, 0xa1ffff, PicoRead16_32x_on, 1);
- cpu68k_map_set(m68k_write8_map, 0xa10000, 0xa1ffff, PicoWrite8_32x_on, 1);
- cpu68k_map_set(m68k_write16_map, 0xa10000, 0xa1ffff, PicoWrite16_32x_on, 1);
- // TODO: cd + carthw
- if (PicoIn.AHW & PAHW_MCD) {
- m68k_write8_io = PicoWrite8_32x_on_io_cd;
- m68k_write16_io = PicoWrite16_32x_on_io_cd;
- }
- else if (carthw_ssf2_active) {
- m68k_write8_io = PicoWrite8_32x_on_io_ssf2;
- m68k_write16_io = PicoWrite16_32x_on_io_ssf2;
- }
- else {
- m68k_write8_io = PicoWrite8_32x_on_io;
- m68k_write16_io = PicoWrite16_32x_on_io;
- }
- // SH2 maps: A31,A30,A29,CS1,CS0
- // all unmapped by default
- for (i = 0; i < ARRAY_SIZE(msh2_read8_map); i++) {
- msh2_read8_map[i].addr = MAP_HANDLER(sh2_read8_unmapped);
- msh2_read16_map[i].addr = MAP_HANDLER(sh2_read16_unmapped);
- msh2_read32_map[i].addr = MAP_HANDLER(sh2_read32_unmapped);
- }
- for (i = 0; i < ARRAY_SIZE(msh2_write8_map); i++) {
- msh2_write8_map[i] = sh2_write8_unmapped;
- msh2_write16_map[i] = sh2_write16_unmapped;
- msh2_write32_map[i] = sh2_write32_unmapped;
- }
- // "purge area"
- for (i = 0x40; i <= 0x5f; i++) {
- msh2_write8_map[i >> 1] =
- msh2_write16_map[i >> 1] =
- msh2_write32_map[i >> 1] = sh2_write_ignore;
- }
- // CS0
- msh2_read8_map[0x00/2].addr = msh2_read8_map[0x20/2].addr = MAP_HANDLER(sh2_read8_cs0);
- msh2_read16_map[0x00/2].addr = msh2_read16_map[0x20/2].addr = MAP_HANDLER(sh2_read16_cs0);
- msh2_read32_map[0x00/2].addr = msh2_read32_map[0x20/2].addr = MAP_HANDLER(sh2_read32_cs0);
- msh2_write8_map[0x00/2] = msh2_write8_map[0x20/2] = sh2_write8_cs0;
- msh2_write16_map[0x00/2] = msh2_write16_map[0x20/2] = sh2_write16_cs0;
- msh2_write32_map[0x00/2] = msh2_write32_map[0x20/2] = sh2_write32_cs0;
- // CS1 - ROM
- bank_switch_rom_sh2();
- msh2_read8_map[0x02/2].mask = msh2_read8_map[0x22/2].mask = 0x3fffff; // FIXME
- msh2_read16_map[0x02/2].mask = msh2_read16_map[0x22/2].mask = 0x3ffffe; // FIXME
- msh2_read32_map[0x02/2].mask = msh2_read32_map[0x22/2].mask = 0x3ffffc; // FIXME
- msh2_write16_map[0x02/2] = msh2_write16_map[0x22/2] = sh2_write16_rom;
- msh2_write32_map[0x02/2] = msh2_write32_map[0x22/2] = sh2_write32_rom;
- // CS2 - DRAM
- msh2_read8_map[0x04/2].mask = msh2_read8_map[0x24/2].mask = 0x01ffff;
- msh2_read16_map[0x04/2].mask = msh2_read16_map[0x24/2].mask = 0x01fffe;
- msh2_read32_map[0x04/2].mask = msh2_read32_map[0x24/2].mask = 0x01fffc;
- msh2_write8_map[0x04/2] = msh2_write8_map[0x24/2] = sh2_write8_dram;
- msh2_write16_map[0x04/2] = msh2_write16_map[0x24/2] = sh2_write16_dram;
- msh2_write32_map[0x04/2] = msh2_write32_map[0x24/2] = sh2_write32_dram;
- // CS3 - SDRAM
- msh2_read8_map[0x06/2].addr = msh2_read8_map[0x26/2].addr =
- msh2_read16_map[0x06/2].addr = msh2_read16_map[0x26/2].addr =
- msh2_read32_map[0x06/2].addr = msh2_read32_map[0x26/2].addr = MAP_MEMORY(Pico32xMem->sdram);
- msh2_write8_map[0x06/2] = msh2_write8_map[0x26/2] = sh2_write8_sdram;
- msh2_write16_map[0x06/2] = msh2_write16_map[0x26/2] = sh2_write16_sdram;
- msh2_write32_map[0x06/2] = msh2_write32_map[0x26/2] = sh2_write32_sdram;
- msh2_read8_map[0x06/2].mask = msh2_read8_map[0x26/2].mask = 0x03ffff;
- msh2_read16_map[0x06/2].mask = msh2_read16_map[0x26/2].mask = 0x03fffe;
- msh2_read32_map[0x06/2].mask = msh2_read32_map[0x26/2].mask = 0x03fffc;
- // SH2 data array
- msh2_read8_map[0xc0/2].mask = 0x0fff;
- msh2_read16_map[0xc0/2].mask = 0x0ffe;
- msh2_read32_map[0xc0/2].mask = 0x0ffc;
- msh2_write8_map[0xc0/2] = sh2_write8_da;
- msh2_write16_map[0xc0/2] = sh2_write16_da;
- msh2_write32_map[0xc0/2] = sh2_write32_da;
- // SH2 IO
- msh2_read8_map[0xff/2].addr = MAP_HANDLER(sh2_peripheral_read8);
- msh2_read16_map[0xff/2].addr = MAP_HANDLER(sh2_peripheral_read16);
- msh2_read32_map[0xff/2].addr = MAP_HANDLER(sh2_peripheral_read32);
- msh2_write8_map[0xff/2] = sh2_peripheral_write8;
- msh2_write16_map[0xff/2] = sh2_peripheral_write16;
- msh2_write32_map[0xff/2] = sh2_peripheral_write32;
- memcpy(ssh2_read8_map, msh2_read8_map, sizeof(msh2_read8_map));
- memcpy(ssh2_read16_map, msh2_read16_map, sizeof(msh2_read16_map));
- memcpy(ssh2_read32_map, msh2_read32_map, sizeof(msh2_read32_map));
- memcpy(ssh2_write8_map, msh2_write8_map, sizeof(msh2_write8_map));
- memcpy(ssh2_write16_map, msh2_write16_map, sizeof(msh2_write16_map));
- memcpy(ssh2_write32_map, msh2_write32_map, sizeof(msh2_write32_map));
- msh2_read8_map[0xc0/2].addr =
- msh2_read16_map[0xc0/2].addr =
- msh2_read32_map[0xc0/2].addr = MAP_MEMORY(msh2.data_array);
- ssh2_read8_map[0xc0/2].addr =
- ssh2_read16_map[0xc0/2].addr =
- ssh2_read32_map[0xc0/2].addr = MAP_MEMORY(ssh2.data_array);
- // map DRAM area, both 68k and SH2
- Pico32xSwapDRAM(1);
- msh2.read8_map = msh2_read8_map; ssh2.read8_map = ssh2_read8_map;
- msh2.read16_map = msh2_read16_map; ssh2.read16_map = ssh2_read16_map;
- msh2.read32_map = msh2_read32_map; ssh2.read32_map = ssh2_read32_map;
- msh2.write8_tab = (const void **)(void *)msh2_write8_map;
- msh2.write16_tab = (const void **)(void *)msh2_write16_map;
- msh2.write32_tab = (const void **)(void *)msh2_write32_map;
- ssh2.write8_tab = (const void **)(void *)ssh2_write8_map;
- ssh2.write16_tab = (const void **)(void *)ssh2_write16_map;
- ssh2.write32_tab = (const void **)(void *)ssh2_write32_map;
- // convenience ptrs
- msh2.p_sdram = ssh2.p_sdram = Pico32xMem->sdram;
- msh2.p_rom = ssh2.p_rom = Pico.rom;
- msh2.p_bios = Pico32xMem->sh2_rom_m.w; msh2.p_da = msh2.data_array;
- ssh2.p_bios = Pico32xMem->sh2_rom_s.w; ssh2.p_da = ssh2.data_array;
- sh2_drc_mem_setup(&msh2);
- sh2_drc_mem_setup(&ssh2);
- memset(sh2_poll_rd, 0, sizeof(sh2_poll_rd));
- memset(sh2_poll_wr, 0, sizeof(sh2_poll_wr));
- memset(sh2_poll_fifo, -1, sizeof(sh2_poll_fifo));
- // z80 hack
- z80_map_set(z80_write_map, 0x8000, 0xffff, z80_md_bank_write_32x, 1);
- }
- void p32x_update_banks(void)
- {
- bank_switch_rom_68k(Pico32x.regs[4 / 2]);
- bank_switch_rom_sh2();
- if (Pico32x.emu_flags & P32XF_DRC_ROM_C)
- sh2_drc_flush_all();
- }
- void Pico32xMemStateLoaded(void)
- {
- bank_switch_rom_68k(Pico32x.regs[4 / 2]);
- Pico32xSwapDRAM((Pico32x.vdp_regs[0x0a / 2] & P32XV_FS) ^ P32XV_FS);
- memset(Pico32xMem->pwm, 0, sizeof(Pico32xMem->pwm));
- Pico32x.dirty_pal = 1;
- Pico32x.emu_flags &= ~(P32XF_68KCPOLL | P32XF_68KVPOLL);
- memset(&m68k_poll, 0, sizeof(m68k_poll));
- msh2.state = 0;
- msh2.poll_addr = msh2.poll_cycles = msh2.poll_cnt = 0;
- ssh2.state = 0;
- ssh2.poll_addr = ssh2.poll_cycles = ssh2.poll_cnt = 0;
- sh2_drc_flush_all();
- }
- // vim:shiftwidth=2:ts=2:expandtab
|