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- /*
- * memory handling
- * (c) Copyright Dave, 2004
- * (C) notaz, 2006-2010
- *
- * This work is licensed under the terms of MAME license.
- * See COPYING file in the top-level directory.
- */
- #include "pico_int.h"
- #include "memory.h"
- #include "sound/ym2612.h"
- #include "sound/sn76496.h"
- extern unsigned int lastSSRamWrite; // used by serial eeprom code
- uptr m68k_read8_map [0x1000000 >> M68K_MEM_SHIFT];
- uptr m68k_read16_map [0x1000000 >> M68K_MEM_SHIFT];
- uptr m68k_write8_map [0x1000000 >> M68K_MEM_SHIFT];
- uptr m68k_write16_map[0x1000000 >> M68K_MEM_SHIFT];
- static void xmap_set(uptr *map, int shift, u32 start_addr, u32 end_addr,
- const void *func_or_mh, int is_func)
- {
- #ifdef __clang__
- // workaround bug (segfault) in
- // Apple LLVM version 4.2 (clang-425.0.27) (based on LLVM 3.2svn)
- volatile
- #endif
- uptr addr = (uptr)func_or_mh;
- int mask = (1 << shift) - 1;
- int i;
- if ((start_addr & mask) != 0 || (end_addr & mask) != mask) {
- elprintf(EL_STATUS|EL_ANOMALY, "xmap_set: tried to map bad range: %06x-%06x",
- start_addr, end_addr);
- return;
- }
- if (addr & 1) {
- elprintf(EL_STATUS|EL_ANOMALY, "xmap_set: ptr is not aligned: %08lx", addr);
- return;
- }
- if (!is_func)
- addr -= start_addr;
- for (i = start_addr >> shift; i <= end_addr >> shift; i++) {
- map[i] = addr >> 1;
- if (is_func)
- map[i] |= MAP_FLAG;
- }
- }
- void z80_map_set(uptr *map, u16 start_addr, u16 end_addr,
- const void *func_or_mh, int is_func)
- {
- xmap_set(map, Z80_MEM_SHIFT, start_addr, end_addr, func_or_mh, is_func);
- #ifdef _USE_CZ80
- if (!is_func)
- Cz80_Set_Fetch(&CZ80, start_addr, end_addr, (FPTR)func_or_mh);
- #endif
- }
- void cpu68k_map_set(uptr *map, u32 start_addr, u32 end_addr,
- const void *func_or_mh, int is_func)
- {
- xmap_set(map, M68K_MEM_SHIFT, start_addr, end_addr, func_or_mh, is_func);
- #ifdef EMU_F68K
- // setup FAME fetchmap
- if (!is_func)
- {
- int shiftout = 24 - FAMEC_FETCHBITS;
- int i = start_addr >> shiftout;
- uptr base = (uptr)func_or_mh - (i << shiftout);
- for (; i <= (end_addr >> shiftout); i++)
- PicoCpuFM68k.Fetch[i] = base;
- }
- #endif
- }
- // more specialized/optimized function (does same as above)
- void cpu68k_map_all_ram(u32 start_addr, u32 end_addr, void *ptr, int is_sub)
- {
- uptr *r8map, *r16map, *w8map, *w16map;
- uptr addr = (uptr)ptr;
- int shift = M68K_MEM_SHIFT;
- int i;
- if (!is_sub) {
- r8map = m68k_read8_map;
- r16map = m68k_read16_map;
- w8map = m68k_write8_map;
- w16map = m68k_write16_map;
- } else {
- r8map = s68k_read8_map;
- r16map = s68k_read16_map;
- w8map = s68k_write8_map;
- w16map = s68k_write16_map;
- }
- addr -= start_addr;
- addr >>= 1;
- for (i = start_addr >> shift; i <= end_addr >> shift; i++)
- r8map[i] = r16map[i] = w8map[i] = w16map[i] = addr;
- #ifdef EMU_F68K
- // setup FAME fetchmap
- {
- M68K_CONTEXT *ctx = is_sub ? &PicoCpuFS68k : &PicoCpuFM68k;
- int shiftout = 24 - FAMEC_FETCHBITS;
- i = start_addr >> shiftout;
- addr = (uptr)ptr - (i << shiftout);
- for (; i <= (end_addr >> shiftout); i++)
- ctx->Fetch[i] = addr;
- }
- #endif
- }
- static u32 m68k_unmapped_read8(u32 a)
- {
- elprintf(EL_UIO, "m68k unmapped r8 [%06x] @%06x", a, SekPc);
- return (PicoIn.AHW & PAHW_MCD) ? 0x00 : 0xff; // pulldown if MegaCD2 attached
- }
- static u32 m68k_unmapped_read16(u32 a)
- {
- elprintf(EL_UIO, "m68k unmapped r16 [%06x] @%06x", a, SekPc);
- return (PicoIn.AHW & PAHW_MCD) ? 0x00 : 0xffff;
- }
- static void m68k_unmapped_write8(u32 a, u32 d)
- {
- elprintf(EL_UIO, "m68k unmapped w8 [%06x] %02x @%06x", a, d & 0xff, SekPc);
- }
- static void m68k_unmapped_write16(u32 a, u32 d)
- {
- elprintf(EL_UIO, "m68k unmapped w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc);
- }
- void m68k_map_unmap(u32 start_addr, u32 end_addr)
- {
- #ifdef __clang__
- // workaround bug (segfault) in
- // Apple LLVM version 4.2 (clang-425.0.27) (based on LLVM 3.2svn)
- volatile
- #endif
- uptr addr;
- int shift = M68K_MEM_SHIFT;
- int i;
- addr = (uptr)m68k_unmapped_read8;
- for (i = start_addr >> shift; i <= end_addr >> shift; i++)
- m68k_read8_map[i] = (addr >> 1) | MAP_FLAG;
- addr = (uptr)m68k_unmapped_read16;
- for (i = start_addr >> shift; i <= end_addr >> shift; i++)
- m68k_read16_map[i] = (addr >> 1) | MAP_FLAG;
- addr = (uptr)m68k_unmapped_write8;
- for (i = start_addr >> shift; i <= end_addr >> shift; i++)
- m68k_write8_map[i] = (addr >> 1) | MAP_FLAG;
- addr = (uptr)m68k_unmapped_write16;
- for (i = start_addr >> shift; i <= end_addr >> shift; i++)
- m68k_write16_map[i] = (addr >> 1) | MAP_FLAG;
- }
- #ifndef _ASM_MEMORY_C
- MAKE_68K_READ8(m68k_read8, m68k_read8_map)
- MAKE_68K_READ16(m68k_read16, m68k_read16_map)
- MAKE_68K_READ32(m68k_read32, m68k_read16_map)
- MAKE_68K_WRITE8(m68k_write8, m68k_write8_map)
- MAKE_68K_WRITE16(m68k_write16, m68k_write16_map)
- MAKE_68K_WRITE32(m68k_write32, m68k_write16_map)
- #endif
- // -----------------------------------------------------------------
- static u32 ym2612_read_local_68k(void);
- static int ym2612_write_local(u32 a, u32 d, int is_from_z80);
- static void z80_mem_setup(void);
- #ifdef _ASM_MEMORY_C
- u32 PicoRead8_sram(u32 a);
- u32 PicoRead16_sram(u32 a);
- #endif
- #ifdef EMU_CORE_DEBUG
- u32 lastread_a, lastread_d[16]={0,}, lastwrite_cyc_d[16]={0,}, lastwrite_mus_d[16]={0,};
- int lrp_cyc=0, lrp_mus=0, lwp_cyc=0, lwp_mus=0;
- extern unsigned int ppop;
- #endif
- #ifdef IO_STATS
- void log_io(unsigned int addr, int bits, int rw);
- #elif defined(_MSC_VER)
- #define log_io
- #else
- #define log_io(...)
- #endif
- #if defined(EMU_C68K)
- void cyclone_crashed(u32 pc, struct Cyclone *context)
- {
- elprintf(EL_STATUS|EL_ANOMALY, "%c68k crash detected @ %06x",
- context == &PicoCpuCM68k ? 'm' : 's', pc);
- context->membase = (u32)Pico.rom;
- context->pc = (u32)Pico.rom + Pico.romsize;
- }
- #endif
- // -----------------------------------------------------------------
- // memmap helpers
- static u32 read_pad_3btn(int i, u32 out_bits)
- {
- u32 pad = ~PicoIn.padInt[i]; // Get inverse of pad MXYZ SACB RLDU
- u32 value;
- if (out_bits & 0x40) // TH
- value = pad & 0x3f; // ?1CB RLDU
- else
- value = ((pad & 0xc0) >> 2) | (pad & 3); // ?0SA 00DU
- value |= out_bits & 0x40;
- return value;
- }
- static u32 read_pad_6btn(int i, u32 out_bits)
- {
- u32 pad = ~PicoIn.padInt[i]; // Get inverse of pad MXYZ SACB RLDU
- int phase = Pico.m.padTHPhase[i];
- u32 value;
- if (phase == 2 && !(out_bits & 0x40)) {
- value = (pad & 0xc0) >> 2; // ?0SA 0000
- goto out;
- }
- else if(phase == 3) {
- if (out_bits & 0x40)
- value = (pad & 0x30) | ((pad >> 8) & 0xf); // ?1CB MXYZ
- else
- value = ((pad & 0xc0) >> 2) | 0x0f; // ?0SA 1111
- goto out;
- }
- if (out_bits & 0x40) // TH
- value = pad & 0x3f; // ?1CB RLDU
- else
- value = ((pad & 0xc0) >> 2) | (pad & 3); // ?0SA 00DU
- out:
- value |= out_bits & 0x40;
- return value;
- }
- static u32 read_pad_team(int i, u32 out_bits)
- {
- u32 pad;
- int phase = Pico.m.padTHPhase[i];
- u32 value;
- if (phase == 0) {
- value = 0x03;
- goto out;
- }
- if (phase == 1) {
- value = 0x0f;
- goto out;
- }
- pad = ~PicoIn.padInt[0]; // Get inverse of pad MXYZ SACB RLDU
- if (phase == 8) {
- value = pad & 0x0f; // ?x?x RLDU
- goto out;
- }
- else if(phase == 9) {
- value = (pad & 0xf0) >> 4; // ?x?x SACB
- goto out;
- }
- pad = ~PicoIn.padInt[1]; // Get inverse of pad MXYZ SACB RLDU
- if (phase == 12) {
- value = pad & 0x0f; // ?x?x RLDU
- goto out;
- }
- else if(phase == 13) {
- value = (pad & 0xf0) >> 4; // ?x?x SACB
- goto out;
- }
- if (phase >= 8 && pad < 16) {
- value = 0x0f;
- goto out;
- }
- value = 0;
- out:
- value |= (out_bits & 0x40) | ((out_bits & 0x20)>>1);
- return value;
- }
- static u32 read_pad_4way(int i, u32 out_bits)
- {
- u32 pad = (PicoMem.ioports[2] & 0x70) >> 4;
- u32 value = 0;
- if (i == 0 && !(pad & 1))
- value = read_pad_3btn(pad >> 1, out_bits);
- value |= (out_bits & 0x40);
- return value;
- }
- static u32 read_nothing(int i, u32 out_bits)
- {
- return 0xff;
- }
- typedef u32 (port_read_func)(int index, u32 out_bits);
- static port_read_func *port_readers[3] = {
- read_pad_3btn,
- read_pad_3btn,
- read_nothing
- };
- static NOINLINE u32 port_read(int i)
- {
- u32 data_reg = PicoMem.ioports[i + 1];
- u32 ctrl_reg = PicoMem.ioports[i + 4] | 0x80;
- u32 in, out;
- out = data_reg & ctrl_reg;
- // pull-ups: should be 0x7f, but Decap Attack has a bug where it temp.
- // disables output before doing TH-low read, so don't emulate it for TH.
- // Decap Attack reportedly doesn't work on Nomad but works on must
- // other MD revisions (different pull-up strength?).
- if (PicoIn.AHW & (PAHW_32X|PAHW_MCD)) // don't do it on 32X, it breaks WWF Raw
- out |= 0x7f & ~ctrl_reg;
- else
- out |= 0x3f & ~ctrl_reg;
- in = port_readers[i](i, out);
- return (in & ~ctrl_reg) | (data_reg & ctrl_reg);
- }
- void PicoSetInputDevice(int port, enum input_device device)
- {
- port_read_func *func;
- if (port < 0 || port > 2)
- return;
- switch (device) {
- case PICO_INPUT_PAD_3BTN:
- func = read_pad_3btn;
- break;
- case PICO_INPUT_PAD_6BTN:
- func = read_pad_6btn;
- break;
- case PICO_INPUT_PAD_TEAM:
- func = read_pad_team;
- break;
- case PICO_INPUT_PAD_4WAY:
- func = read_pad_4way;
- break;
- default:
- func = read_nothing;
- break;
- }
- port_readers[port] = func;
- }
- NOINLINE u32 io_ports_read(u32 a)
- {
- u32 d;
- a = (a>>1) & 0xf;
- switch (a) {
- case 0: d = Pico.m.hardware; break; // Hardware value (Version register)
- case 1: d = port_read(0); break;
- case 2: d = port_read(1); break;
- case 3: d = port_read(2); break;
- default: d = PicoMem.ioports[a]; break; // IO ports can be used as RAM
- }
- return d;
- }
- NOINLINE void io_ports_write(u32 a, u32 d)
- {
- a = (a>>1) & 0xf;
- // 6 button gamepad: if TH went from 0 to 1, gamepad changes state
- if (1 <= a && a <= 2)
- {
- Pico.m.padDelay[a - 1] = 0;
- if (port_readers[a - 1] == read_pad_team) {
- if (d & 0x40)
- Pico.m.padTHPhase[a - 1] = 0;
- else if ((d^PicoMem.ioports[a]) & 0x60)
- Pico.m.padTHPhase[a - 1]++;
- } else if (port_readers[a - 1] == read_pad_4way) {
- if (a == 2 && ((PicoMem.ioports[a] ^ d) & 0x70))
- Pico.m.padTHPhase[0] = 0;
- if (a == 1 && !(PicoMem.ioports[a] & 0x40) && (d & 0x40))
- Pico.m.padTHPhase[0]++;
- } else if (!(PicoMem.ioports[a] & 0x40) && (d & 0x40))
- Pico.m.padTHPhase[a - 1]++;
- }
- // certain IO ports can be used as RAM
- PicoMem.ioports[a] = d;
- }
- static int z80_cycles_from_68k(void)
- {
- int m68k_cnt = SekCyclesDone() - Pico.t.m68c_frame_start;
- return cycles_68k_to_z80(m68k_cnt);
- }
- void NOINLINE ctl_write_z80busreq(u32 d)
- {
- d&=1; d^=1;
- elprintf(EL_BUSREQ, "set_zrun: %i->%i [%u] @%06x", Pico.m.z80Run, d, SekCyclesDone(), SekPc);
- if (d ^ Pico.m.z80Run)
- {
- if (d)
- {
- Pico.t.z80c_cnt = z80_cycles_from_68k() + 2;
- }
- else
- {
- if ((PicoIn.opt & POPT_EN_Z80) && !Pico.m.z80_reset) {
- pprof_start(m68k);
- PicoSyncZ80(SekCyclesDone());
- pprof_end_sub(m68k);
- }
- }
- Pico.m.z80Run = d;
- }
- }
- void NOINLINE ctl_write_z80reset(u32 d)
- {
- d&=1; d^=1;
- elprintf(EL_BUSREQ, "set_zreset: %i->%i [%u] @%06x", Pico.m.z80_reset, d, SekCyclesDone(), SekPc);
- if (d ^ Pico.m.z80_reset)
- {
- if (d)
- {
- if ((PicoIn.opt & POPT_EN_Z80) && Pico.m.z80Run) {
- pprof_start(m68k);
- PicoSyncZ80(SekCyclesDone());
- pprof_end_sub(m68k);
- }
- YM2612ResetChip();
- timers_reset();
- }
- else
- {
- Pico.t.z80c_cnt = z80_cycles_from_68k() + 2;
- z80_reset();
- }
- Pico.m.z80_reset = d;
- }
- }
- static void psg_write_68k(u32 d)
- {
- PsndDoPSG(z80_cycles_from_68k());
- SN76496Write(d);
- }
- static void psg_write_z80(u32 d)
- {
- PsndDoPSG(z80_cyclesDone());
- SN76496Write(d);
- }
- // -----------------------------------------------------------------
- #ifndef _ASM_MEMORY_C
- // cart (save) RAM area (usually 0x200000 - ...)
- static u32 PicoRead8_sram(u32 a)
- {
- u32 d;
- if (Pico.sv.start <= a && a <= Pico.sv.end && (Pico.m.sram_reg & SRR_MAPPED))
- {
- if (Pico.sv.flags & SRF_EEPROM) {
- d = EEPROM_read();
- if (!(a & 1))
- d >>= 8;
- d &= 0xff;
- } else
- d = *(u8 *)(Pico.sv.data - Pico.sv.start + a);
- elprintf(EL_SRAMIO, "sram r8 [%06x] %02x @ %06x", a, d, SekPc);
- return d;
- }
- // XXX: this is banking unfriendly
- if (a < Pico.romsize)
- return Pico.rom[MEM_BE2(a)];
-
- return m68k_unmapped_read8(a);
- }
- static u32 PicoRead16_sram(u32 a)
- {
- u32 d;
- if (Pico.sv.start <= a && a <= Pico.sv.end && (Pico.m.sram_reg & SRR_MAPPED))
- {
- if (Pico.sv.flags & SRF_EEPROM)
- d = EEPROM_read();
- else {
- u8 *pm = (u8 *)(Pico.sv.data - Pico.sv.start + a);
- d = pm[0] << 8;
- d |= pm[1];
- }
- elprintf(EL_SRAMIO, "sram r16 [%06x] %04x @ %06x", a, d, SekPc);
- return d;
- }
- if (a < Pico.romsize)
- return *(u16 *)(Pico.rom + a);
- return m68k_unmapped_read16(a);
- }
- #endif // _ASM_MEMORY_C
- static void PicoWrite8_sram(u32 a, u32 d)
- {
- if (a > Pico.sv.end || a < Pico.sv.start || !(Pico.m.sram_reg & SRR_MAPPED)) {
- m68k_unmapped_write8(a, d);
- return;
- }
- elprintf(EL_SRAMIO, "sram w8 [%06x] %02x @ %06x", a, d & 0xff, SekPc);
- if (Pico.sv.flags & SRF_EEPROM)
- {
- EEPROM_write8(a, d);
- }
- else {
- u8 *pm = (u8 *)(Pico.sv.data - Pico.sv.start + a);
- if (*pm != (u8)d) {
- Pico.sv.changed = 1;
- *pm = (u8)d;
- }
- }
- }
- static void PicoWrite16_sram(u32 a, u32 d)
- {
- if (a > Pico.sv.end || a < Pico.sv.start || !(Pico.m.sram_reg & SRR_MAPPED)) {
- m68k_unmapped_write16(a, d);
- return;
- }
- elprintf(EL_SRAMIO, "sram w16 [%06x] %04x @ %06x", a, d & 0xffff, SekPc);
- if (Pico.sv.flags & SRF_EEPROM)
- {
- EEPROM_write16(d);
- }
- else {
- u8 *pm = (u8 *)(Pico.sv.data - Pico.sv.start + a);
- if (pm[0] != (u8)(d >> 8)) {
- Pico.sv.changed = 1;
- pm[0] = (u8)(d >> 8);
- }
- if (pm[1] != (u8)d) {
- Pico.sv.changed = 1;
- pm[1] = (u8)d;
- }
- }
- }
- // z80 area (0xa00000 - 0xa0ffff)
- // TODO: verify mirrors VDP and bank reg (bank area mirroring verified)
- static u32 PicoRead8_z80(u32 a)
- {
- u32 d = 0xff;
- if ((Pico.m.z80Run & 1) || Pico.m.z80_reset) {
- elprintf(EL_ANOMALY, "68k z80 read with no bus! [%06x] @ %06x", a, SekPc);
- // open bus. Pulled down if MegaCD2 is attached.
- return 0;
- }
- if ((a & 0x4000) == 0x0000)
- d = PicoMem.zram[a & 0x1fff];
- else if ((a & 0x6000) == 0x4000) // 0x4000-0x5fff
- d = ym2612_read_local_68k();
- else
- elprintf(EL_UIO|EL_ANOMALY, "68k bad read [%06x] @%06x", a, SekPc);
- return d;
- }
- static u32 PicoRead16_z80(u32 a)
- {
- u32 d = PicoRead8_z80(a);
- return d | (d << 8);
- }
- static void PicoWrite8_z80(u32 a, u32 d)
- {
- if ((Pico.m.z80Run & 1) || Pico.m.z80_reset) {
- // verified on real hw
- elprintf(EL_ANOMALY, "68k z80 write with no bus or reset! [%06x] %02x @ %06x", a, d&0xff, SekPc);
- return;
- }
- if ((a & 0x4000) == 0x0000) { // z80 RAM
- PicoMem.zram[a & 0x1fff] = (u8)d;
- return;
- }
- if ((a & 0x6000) == 0x4000) { // FM Sound
- if (PicoIn.opt & POPT_EN_FM)
- ym2612_write_local(a & 3, d & 0xff, 0);
- return;
- }
- // TODO: probably other VDP access too? Maybe more mirrors?
- if ((a & 0x7ff9) == 0x7f11) { // PSG Sound
- psg_write_68k(d);
- return;
- }
- if ((a & 0x7f00) == 0x6000) // Z80 BANK register
- {
- Pico.m.z80_bank68k >>= 1;
- Pico.m.z80_bank68k |= d << 8;
- Pico.m.z80_bank68k &= 0x1ff; // 9 bits and filled in the new top one
- elprintf(EL_Z80BNK, "z80 bank=%06x", Pico.m.z80_bank68k << 15);
- return;
- }
- elprintf(EL_UIO|EL_ANOMALY, "68k bad write [%06x] %02x @ %06x", a, d&0xff, SekPc);
- }
- static void PicoWrite16_z80(u32 a, u32 d)
- {
- // for RAM, only most significant byte is sent
- // TODO: verify remaining accesses
- PicoWrite8_z80(a, d >> 8);
- }
- #ifndef _ASM_MEMORY_C
- // IO/control area (0xa10000 - 0xa1ffff)
- u32 PicoRead8_io(u32 a)
- {
- u32 d;
- if ((a & 0xffe0) == 0x0000) { // I/O ports
- d = io_ports_read(a);
- goto end;
- }
- // faking open bus (MegaCD pulldowns don't work here curiously)
- d = Pico.m.rotate++;
- d ^= d << 6;
- if ((a & 0xfc00) == 0x1000) {
- // bit8 seems to be readable in this range
- if (!(a & 1))
- d &= ~0x01;
- if ((a & 0xff01) == 0x1100) { // z80 busreq (verified)
- d |= (Pico.m.z80Run | Pico.m.z80_reset) & 1;
- elprintf(EL_BUSREQ, "get_zrun: %02x [%u] @%06x", d, SekCyclesDone(), SekPc);
- }
- goto end;
- }
- d = PicoRead8_32x(a);
- end:
- return d;
- }
- u32 PicoRead16_io(u32 a)
- {
- u32 d;
- if ((a & 0xffe0) == 0x0000) { // I/O ports
- d = io_ports_read(a);
- d |= d << 8;
- goto end;
- }
- // faking open bus
- d = (Pico.m.rotate += 0x41);
- d ^= (d << 5) ^ (d << 8);
- // bit8 seems to be readable in this range
- if ((a & 0xfc00) == 0x1000) {
- d &= ~0x0100;
- if ((a & 0xff00) == 0x1100) { // z80 busreq
- d |= ((Pico.m.z80Run | Pico.m.z80_reset) & 1) << 8;
- elprintf(EL_BUSREQ, "get_zrun: %04x [%u] @%06x", d, SekCyclesDone(), SekPc);
- }
- goto end;
- }
- d = PicoRead16_32x(a);
- end:
- return d;
- }
- void PicoWrite8_io(u32 a, u32 d)
- {
- if ((a & 0xffe1) == 0x0001) { // I/O ports (verified: only LSB!)
- io_ports_write(a, d);
- return;
- }
- if ((a & 0xff01) == 0x1100) { // z80 busreq
- ctl_write_z80busreq(d);
- return;
- }
- if ((a & 0xff01) == 0x1200) { // z80 reset
- ctl_write_z80reset(d);
- return;
- }
- if (a == 0xa130f1) { // sram access register
- elprintf(EL_SRAMIO, "sram reg=%02x", d);
- Pico.m.sram_reg &= ~(SRR_MAPPED|SRR_READONLY);
- Pico.m.sram_reg |= (u8)(d & 3);
- return;
- }
- PicoWrite8_32x(a, d);
- }
- void PicoWrite16_io(u32 a, u32 d)
- {
- if ((a & 0xffe0) == 0x0000) { // I/O ports (verified: only LSB!)
- io_ports_write(a, d);
- return;
- }
- if ((a & 0xff00) == 0x1100) { // z80 busreq
- ctl_write_z80busreq(d >> 8);
- return;
- }
- if ((a & 0xff00) == 0x1200) { // z80 reset
- ctl_write_z80reset(d >> 8);
- return;
- }
- if (a == 0xa130f0) { // sram access register
- elprintf(EL_SRAMIO, "sram reg=%02x", d);
- Pico.m.sram_reg &= ~(SRR_MAPPED|SRR_READONLY);
- Pico.m.sram_reg |= (u8)(d & 3);
- return;
- }
- PicoWrite16_32x(a, d);
- }
- #endif // _ASM_MEMORY_C
- // VDP area (0xc00000 - 0xdfffff)
- // TODO: verify if lower byte goes to PSG on word writes
- u32 PicoRead8_vdp(u32 a)
- {
- if ((a & 0x00f0) == 0x0000) {
- switch (a & 0x0d)
- {
- case 0x00: return PicoVideoRead8DataH(0);
- case 0x01: return PicoVideoRead8DataL(0);
- case 0x04: return PicoVideoRead8CtlH(0);
- case 0x05: return PicoVideoRead8CtlL(0);
- case 0x08:
- case 0x0c: return PicoVideoRead8HV_H(0);
- case 0x09:
- case 0x0d: return PicoVideoRead8HV_L(0);
- }
- }
- elprintf(EL_UIO|EL_ANOMALY, "68k bad read [%06x] @%06x", a, SekPc);
- return 0;
- }
- static u32 PicoRead16_vdp(u32 a)
- {
- if ((a & 0x00e0) == 0x0000)
- return PicoVideoRead(a);
- elprintf(EL_UIO|EL_ANOMALY, "68k bad read [%06x] @%06x", a, SekPc);
- return 0;
- }
- static void PicoWrite8_vdp(u32 a, u32 d)
- {
- if ((a & 0x00f9) == 0x0011) { // PSG Sound
- psg_write_68k(d);
- return;
- }
- if ((a & 0x00e0) == 0x0000) {
- d &= 0xff;
- PicoVideoWrite(a, d | (d << 8));
- return;
- }
- elprintf(EL_UIO|EL_ANOMALY, "68k bad write [%06x] %02x @%06x", a, d & 0xff, SekPc);
- }
- static void PicoWrite16_vdp(u32 a, u32 d)
- {
- if ((a & 0x00f9) == 0x0010) { // PSG Sound
- psg_write_68k(d);
- return;
- }
- if ((a & 0x00e0) == 0x0000) {
- PicoVideoWrite(a, d);
- return;
- }
- elprintf(EL_UIO|EL_ANOMALY, "68k bad write [%06x] %04x @%06x", a, d & 0xffff, SekPc);
- }
- // -----------------------------------------------------------------
- #ifdef EMU_M68K
- static void m68k_mem_setup(void);
- #endif
- PICO_INTERNAL void PicoMemSetup(void)
- {
- int mask, rs, sstart, a;
- // setup the memory map
- cpu68k_map_set(m68k_read8_map, 0x000000, 0xffffff, m68k_unmapped_read8, 1);
- cpu68k_map_set(m68k_read16_map, 0x000000, 0xffffff, m68k_unmapped_read16, 1);
- cpu68k_map_set(m68k_write8_map, 0x000000, 0xffffff, m68k_unmapped_write8, 1);
- cpu68k_map_set(m68k_write16_map, 0x000000, 0xffffff, m68k_unmapped_write16, 1);
- // ROM
- // align to bank size. We know ROM loader allocated enough for this
- mask = (1 << M68K_MEM_SHIFT) - 1;
- rs = (Pico.romsize + mask) & ~mask;
- if (rs > 0x400000) rs = 0x400000; // max cartridge area
- cpu68k_map_set(m68k_read8_map, 0x000000, rs - 1, Pico.rom, 0);
- cpu68k_map_set(m68k_read16_map, 0x000000, rs - 1, Pico.rom, 0);
- // Common case of on-cart (save) RAM, usually at 0x200000-...
- if ((Pico.sv.flags & SRF_ENABLED) && Pico.sv.data != NULL) {
- sstart = Pico.sv.start & ~mask;
- rs = Pico.sv.end - sstart;
- rs = (rs + mask) & ~mask;
- if (sstart + rs >= 0x1000000)
- rs = 0x1000000 - sstart;
- cpu68k_map_set(m68k_read8_map, sstart, sstart + rs - 1, PicoRead8_sram, 1);
- cpu68k_map_set(m68k_read16_map, sstart, sstart + rs - 1, PicoRead16_sram, 1);
- cpu68k_map_set(m68k_write8_map, sstart, sstart + rs - 1, PicoWrite8_sram, 1);
- cpu68k_map_set(m68k_write16_map, sstart, sstart + rs - 1, PicoWrite16_sram, 1);
- }
- // Z80 region
- cpu68k_map_set(m68k_read8_map, 0xa00000, 0xa0ffff, PicoRead8_z80, 1);
- cpu68k_map_set(m68k_read16_map, 0xa00000, 0xa0ffff, PicoRead16_z80, 1);
- cpu68k_map_set(m68k_write8_map, 0xa00000, 0xa0ffff, PicoWrite8_z80, 1);
- cpu68k_map_set(m68k_write16_map, 0xa00000, 0xa0ffff, PicoWrite16_z80, 1);
- // IO/control region
- cpu68k_map_set(m68k_read8_map, 0xa10000, 0xa1ffff, PicoRead8_io, 1);
- cpu68k_map_set(m68k_read16_map, 0xa10000, 0xa1ffff, PicoRead16_io, 1);
- cpu68k_map_set(m68k_write8_map, 0xa10000, 0xa1ffff, PicoWrite8_io, 1);
- cpu68k_map_set(m68k_write16_map, 0xa10000, 0xa1ffff, PicoWrite16_io, 1);
- // VDP region
- for (a = 0xc00000; a < 0xe00000; a += 0x010000) {
- if ((a & 0xe700e0) != 0xc00000)
- continue;
- cpu68k_map_set(m68k_read8_map, a, a + 0xffff, PicoRead8_vdp, 1);
- cpu68k_map_set(m68k_read16_map, a, a + 0xffff, PicoRead16_vdp, 1);
- cpu68k_map_set(m68k_write8_map, a, a + 0xffff, PicoWrite8_vdp, 1);
- cpu68k_map_set(m68k_write16_map, a, a + 0xffff, PicoWrite16_vdp, 1);
- }
- // RAM and it's mirrors
- for (a = 0xe00000; a < 0x1000000; a += 0x010000) {
- cpu68k_map_set(m68k_read8_map, a, a + 0xffff, PicoMem.ram, 0);
- cpu68k_map_set(m68k_read16_map, a, a + 0xffff, PicoMem.ram, 0);
- cpu68k_map_set(m68k_write8_map, a, a + 0xffff, PicoMem.ram, 0);
- cpu68k_map_set(m68k_write16_map, a, a + 0xffff, PicoMem.ram, 0);
- }
- // Setup memory callbacks:
- #ifdef EMU_C68K
- PicoCpuCM68k.read8 = (void *)m68k_read8_map;
- PicoCpuCM68k.read16 = (void *)m68k_read16_map;
- PicoCpuCM68k.read32 = (void *)m68k_read16_map;
- PicoCpuCM68k.write8 = (void *)m68k_write8_map;
- PicoCpuCM68k.write16 = (void *)m68k_write16_map;
- PicoCpuCM68k.write32 = (void *)m68k_write16_map;
- PicoCpuCM68k.checkpc = NULL; /* unused */
- PicoCpuCM68k.fetch8 = NULL;
- PicoCpuCM68k.fetch16 = NULL;
- PicoCpuCM68k.fetch32 = NULL;
- #endif
- #ifdef EMU_F68K
- PicoCpuFM68k.read_byte = (void *)m68k_read8;
- PicoCpuFM68k.read_word = (void *)m68k_read16;
- PicoCpuFM68k.read_long = (void *)m68k_read32;
- PicoCpuFM68k.write_byte = (void *)m68k_write8;
- PicoCpuFM68k.write_word = (void *)m68k_write16;
- PicoCpuFM68k.write_long = (void *)m68k_write32;
- // setup FAME fetchmap
- {
- int i;
- // by default, point everything to first 64k of ROM
- for (i = 0; i < M68K_FETCHBANK1 * 0xe0 / 0x100; i++)
- PicoCpuFM68k.Fetch[i] = (uptr)Pico.rom - (i<<(24-FAMEC_FETCHBITS));
- // now real ROM
- for (i = 0; i < M68K_FETCHBANK1 && (i<<(24-FAMEC_FETCHBITS)) < Pico.romsize; i++)
- PicoCpuFM68k.Fetch[i] = (uptr)Pico.rom;
- // RAM already set
- }
- #endif
- #ifdef EMU_M68K
- m68k_mem_setup();
- #endif
- z80_mem_setup();
- }
- #ifdef EMU_M68K
- unsigned int (*pm68k_read_memory_8) (unsigned int address) = NULL;
- unsigned int (*pm68k_read_memory_16)(unsigned int address) = NULL;
- unsigned int (*pm68k_read_memory_32)(unsigned int address) = NULL;
- void (*pm68k_write_memory_8) (unsigned int address, unsigned char value) = NULL;
- void (*pm68k_write_memory_16)(unsigned int address, unsigned short value) = NULL;
- void (*pm68k_write_memory_32)(unsigned int address, unsigned int value) = NULL;
- /* it appears that Musashi doesn't always mask the unused bits */
- unsigned int m68k_read_memory_8 (unsigned int address) { return pm68k_read_memory_8 (address) & 0xff; }
- unsigned int m68k_read_memory_16(unsigned int address) { return pm68k_read_memory_16(address) & 0xffff; }
- unsigned int m68k_read_memory_32(unsigned int address) { return pm68k_read_memory_32(address); }
- void m68k_write_memory_8 (unsigned int address, unsigned int value) { pm68k_write_memory_8 (address, (u8)value); }
- void m68k_write_memory_16(unsigned int address, unsigned int value) { pm68k_write_memory_16(address,(u16)value); }
- void m68k_write_memory_32(unsigned int address, unsigned int value) { pm68k_write_memory_32(address, value); }
- static void m68k_mem_setup(void)
- {
- pm68k_read_memory_8 = m68k_read8;
- pm68k_read_memory_16 = m68k_read16;
- pm68k_read_memory_32 = m68k_read32;
- pm68k_write_memory_8 = m68k_write8;
- pm68k_write_memory_16 = m68k_write16;
- pm68k_write_memory_32 = m68k_write32;
- }
- #endif // EMU_M68K
- // -----------------------------------------------------------------
- static int get_scanline(int is_from_z80)
- {
- if (is_from_z80) {
- int mclk_z80 = (z80_cyclesLeft<0 ? Pico.t.z80c_aim : z80_cyclesDone()) * 15;
- int mclk_line = Pico.t.z80_scanline * 488 * 7;
- while (mclk_z80 - mclk_line >= 488 * 7)
- Pico.t.z80_scanline++, mclk_line += 488 * 7;
- return Pico.t.z80_scanline;
- }
- return Pico.m.scanline;
- }
- /* probably should not be in this file, but it's near related code here */
- void ym2612_sync_timers(int z80_cycles, int mode_old, int mode_new)
- {
- int xcycles = z80_cycles << 8;
- /* check for overflows */
- if ((mode_old & 4) && xcycles >= Pico.t.timer_a_next_oflow)
- ym2612.OPN.ST.status |= 1;
- if ((mode_old & 8) && xcycles >= Pico.t.timer_b_next_oflow)
- ym2612.OPN.ST.status |= 2;
- /* update timer a */
- if (mode_old & 1)
- while (xcycles > Pico.t.timer_a_next_oflow)
- Pico.t.timer_a_next_oflow += Pico.t.timer_a_step;
- if ((mode_old ^ mode_new) & 1) // turning on/off
- {
- if (mode_old & 1)
- Pico.t.timer_a_next_oflow = TIMER_NO_OFLOW;
- else
- Pico.t.timer_a_next_oflow = xcycles + Pico.t.timer_a_step;
- }
- if (mode_new & 1)
- elprintf(EL_YMTIMER, "timer a upd to %i @ %i", Pico.t.timer_a_next_oflow>>8, z80_cycles);
- /* update timer b */
- if (mode_old & 2)
- while (xcycles > Pico.t.timer_b_next_oflow)
- Pico.t.timer_b_next_oflow += Pico.t.timer_b_step;
- if ((mode_old ^ mode_new) & 2)
- {
- if (mode_old & 2)
- Pico.t.timer_b_next_oflow = TIMER_NO_OFLOW;
- else
- Pico.t.timer_b_next_oflow = xcycles + Pico.t.timer_b_step;
- }
- if (mode_new & 2)
- elprintf(EL_YMTIMER, "timer b upd to %i @ %i", Pico.t.timer_b_next_oflow>>8, z80_cycles);
- }
- // ym2612 DAC and timer I/O handlers for z80
- static int ym2612_write_local(u32 a, u32 d, int is_from_z80)
- {
- int addr;
- a &= 3;
- if (a == 1 && ym2612.OPN.ST.address == 0x2a) /* DAC data */
- {
- int cycles = is_from_z80 ? z80_cyclesDone() : z80_cycles_from_68k();
- //elprintf(EL_STATUS, "%03i dac w %08x z80 %i", cycles, d, is_from_z80);
- if (ym2612.dacen)
- PsndDoDAC(cycles);
- ym2612.dacout = ((int)d - 0x80) << 6;
- return 0;
- }
- switch (a)
- {
- case 0: /* address port 0 */
- ym2612.OPN.ST.address = d;
- ym2612.addr_A1 = 0;
- #ifdef __GP2X__
- if (PicoIn.opt & POPT_EXT_FM) YM2612Write_940(a, d, -1);
- #endif
- return 0;
- case 1: /* data port 0 */
- if (ym2612.addr_A1 != 0)
- return 0;
- addr = ym2612.OPN.ST.address;
- ym2612.REGS[addr] = d;
- switch (addr)
- {
- case 0x24: // timer A High 8
- case 0x25: { // timer A Low 2
- int TAnew = (addr == 0x24) ? ((ym2612.OPN.ST.TA & 0x03)|(((int)d)<<2))
- : ((ym2612.OPN.ST.TA & 0x3fc)|(d&3));
- if (ym2612.OPN.ST.TA != TAnew)
- {
- //elprintf(EL_STATUS, "timer a set %i", TAnew);
- ym2612.OPN.ST.TA = TAnew;
- //ym2612.OPN.ST.TAC = (1024-TAnew)*18;
- //ym2612.OPN.ST.TAT = 0;
- Pico.t.timer_a_step = TIMER_A_TICK_ZCYCLES * (1024 - TAnew);
- if (ym2612.OPN.ST.mode & 1) {
- // this is not right, should really be done on overflow only
- int cycles = is_from_z80 ? z80_cyclesDone() : z80_cycles_from_68k();
- Pico.t.timer_a_next_oflow = (cycles << 8) + Pico.t.timer_a_step;
- }
- elprintf(EL_YMTIMER, "timer a set to %i, %i", 1024 - TAnew, Pico.t.timer_a_next_oflow>>8);
- }
- return 0;
- }
- case 0x26: // timer B
- if (ym2612.OPN.ST.TB != d) {
- //elprintf(EL_STATUS, "timer b set %i", d);
- ym2612.OPN.ST.TB = d;
- //ym2612.OPN.ST.TBC = (256-d) * 288;
- //ym2612.OPN.ST.TBT = 0;
- Pico.t.timer_b_step = TIMER_B_TICK_ZCYCLES * (256 - d); // 262800
- if (ym2612.OPN.ST.mode & 2) {
- int cycles = is_from_z80 ? z80_cyclesDone() : z80_cycles_from_68k();
- Pico.t.timer_b_next_oflow = (cycles << 8) + Pico.t.timer_b_step;
- }
- elprintf(EL_YMTIMER, "timer b set to %i, %i", 256 - d, Pico.t.timer_b_next_oflow>>8);
- }
- return 0;
- case 0x27: { /* mode, timer control */
- int old_mode = ym2612.OPN.ST.mode;
- int cycles = is_from_z80 ? z80_cyclesDone() : z80_cycles_from_68k();
- ym2612.OPN.ST.mode = d;
- elprintf(EL_YMTIMER, "st mode %02x", d);
- ym2612_sync_timers(cycles, old_mode, d);
- /* reset Timer a flag */
- if (d & 0x10)
- ym2612.OPN.ST.status &= ~1;
- /* reset Timer b flag */
- if (d & 0x20)
- ym2612.OPN.ST.status &= ~2;
- if ((d ^ old_mode) & 0xc0) {
- #ifdef __GP2X__
- if (PicoIn.opt & POPT_EXT_FM) return YM2612Write_940(a, d, get_scanline(is_from_z80));
- #endif
- PsndDoFM(cycles);
- return 1;
- }
- return 0;
- }
- case 0x2b: { /* DAC Sel (YM2612) */
- ym2612.dacen = d & 0x80;
- #ifdef __GP2X__
- if (PicoIn.opt & POPT_EXT_FM) YM2612Write_940(a, d, get_scanline(is_from_z80));
- #endif
- return 0;
- }
- }
- break;
- case 2: /* address port 1 */
- ym2612.OPN.ST.address = d;
- ym2612.addr_A1 = 1;
- #ifdef __GP2X__
- if (PicoIn.opt & POPT_EXT_FM) YM2612Write_940(a, d, -1);
- #endif
- return 0;
- case 3: /* data port 1 */
- if (ym2612.addr_A1 != 1)
- return 0;
- addr = ym2612.OPN.ST.address | 0x100;
- ym2612.REGS[addr] = d;
- break;
- }
- #ifdef __GP2X__
- if (PicoIn.opt & POPT_EXT_FM)
- return YM2612Write_940(a, d, get_scanline(is_from_z80));
- #endif
- PsndDoFM(is_from_z80 ? z80_cyclesDone() : z80_cycles_from_68k());
- return YM2612Write_(a, d);
- }
- #define ym2612_read_local() \
- if (xcycles >= Pico.t.timer_a_next_oflow) \
- ym2612.OPN.ST.status |= (ym2612.OPN.ST.mode >> 2) & 1; \
- if (xcycles >= Pico.t.timer_b_next_oflow) \
- ym2612.OPN.ST.status |= (ym2612.OPN.ST.mode >> 2) & 2
- static u32 ym2612_read_local_z80(void)
- {
- int xcycles = z80_cyclesDone() << 8;
- ym2612_read_local();
- elprintf(EL_YMTIMER, "timer z80 read %i, sched %i, %i @ %i|%i",
- ym2612.OPN.ST.status, Pico.t.timer_a_next_oflow >> 8,
- Pico.t.timer_b_next_oflow >> 8, xcycles >> 8, (xcycles >> 8) / 228);
- return ym2612.OPN.ST.status;
- }
- static u32 ym2612_read_local_68k(void)
- {
- int xcycles = z80_cycles_from_68k() << 8;
- ym2612_read_local();
- elprintf(EL_YMTIMER, "timer 68k read %i, sched %i, %i @ %i|%i",
- ym2612.OPN.ST.status, Pico.t.timer_a_next_oflow >> 8,
- Pico.t.timer_b_next_oflow >> 8, xcycles >> 8, (xcycles >> 8) / 228);
- return ym2612.OPN.ST.status;
- }
- void ym2612_pack_state(void)
- {
- // timers are saved as tick counts, in 16.16 int format
- int tac, tat = 0, tbc, tbt = 0;
- tac = 1024 - ym2612.OPN.ST.TA;
- tbc = 256 - ym2612.OPN.ST.TB;
- if (Pico.t.timer_a_next_oflow != TIMER_NO_OFLOW)
- tat = (int)((double)(Pico.t.timer_a_step - Pico.t.timer_a_next_oflow)
- / (double)Pico.t.timer_a_step * tac * 65536);
- if (Pico.t.timer_b_next_oflow != TIMER_NO_OFLOW)
- tbt = (int)((double)(Pico.t.timer_b_step - Pico.t.timer_b_next_oflow)
- / (double)Pico.t.timer_b_step * tbc * 65536);
- elprintf(EL_YMTIMER, "save: timer a %i/%i", tat >> 16, tac);
- elprintf(EL_YMTIMER, "save: timer b %i/%i", tbt >> 16, tbc);
- #ifdef __GP2X__
- if (PicoIn.opt & POPT_EXT_FM)
- YM2612PicoStateSave2_940(tat, tbt);
- else
- #endif
- YM2612PicoStateSave2(tat, tbt);
- }
- void ym2612_unpack_state(void)
- {
- int i, ret, tac, tat, tbc, tbt;
- YM2612PicoStateLoad();
- // feed all the registers and update internal state
- for (i = 0x20; i < 0xA0; i++) {
- ym2612_write_local(0, i, 0);
- ym2612_write_local(1, ym2612.REGS[i], 0);
- }
- for (i = 0x30; i < 0xA0; i++) {
- ym2612_write_local(2, i, 0);
- ym2612_write_local(3, ym2612.REGS[i|0x100], 0);
- }
- for (i = 0xAF; i >= 0xA0; i--) { // must apply backwards
- ym2612_write_local(2, i, 0);
- ym2612_write_local(3, ym2612.REGS[i|0x100], 0);
- ym2612_write_local(0, i, 0);
- ym2612_write_local(1, ym2612.REGS[i], 0);
- }
- for (i = 0xB0; i < 0xB8; i++) {
- ym2612_write_local(0, i, 0);
- ym2612_write_local(1, ym2612.REGS[i], 0);
- ym2612_write_local(2, i, 0);
- ym2612_write_local(3, ym2612.REGS[i|0x100], 0);
- }
- #ifdef __GP2X__
- if (PicoIn.opt & POPT_EXT_FM)
- ret = YM2612PicoStateLoad2_940(&tat, &tbt);
- else
- #endif
- ret = YM2612PicoStateLoad2(&tat, &tbt);
- if (ret != 0) {
- elprintf(EL_STATUS, "old ym2612 state");
- return; // no saved timers
- }
- tac = (1024 - ym2612.OPN.ST.TA) << 16;
- tbc = (256 - ym2612.OPN.ST.TB) << 16;
- if (ym2612.OPN.ST.mode & 1)
- Pico.t.timer_a_next_oflow = (int)((double)(tac - tat) / (double)tac * Pico.t.timer_a_step);
- else
- Pico.t.timer_a_next_oflow = TIMER_NO_OFLOW;
- if (ym2612.OPN.ST.mode & 2)
- Pico.t.timer_b_next_oflow = (int)((double)(tbc - tbt) / (double)tbc * Pico.t.timer_b_step);
- else
- Pico.t.timer_b_next_oflow = TIMER_NO_OFLOW;
- elprintf(EL_YMTIMER, "load: %i/%i, timer_a_next_oflow %i", tat>>16, tac>>16, Pico.t.timer_a_next_oflow >> 8);
- elprintf(EL_YMTIMER, "load: %i/%i, timer_b_next_oflow %i", tbt>>16, tbc>>16, Pico.t.timer_b_next_oflow >> 8);
- }
- #if defined(NO_32X) && defined(_ASM_MEMORY_C)
- // referenced by asm code
- u32 PicoRead8_32x(u32 a) { return 0; }
- u32 PicoRead16_32x(u32 a) { return 0; }
- void PicoWrite8_32x(u32 a, u32 d) {}
- void PicoWrite16_32x(u32 a, u32 d) {}
- #endif
- // -----------------------------------------------------------------
- // z80 memhandlers
- static unsigned char z80_md_vdp_read(unsigned short a)
- {
- z80_subCLeft(2);
- if ((a & 0x00f0) == 0x0000) {
- switch (a & 0x0d)
- {
- case 0x00: return PicoVideoRead8DataH(1);
- case 0x01: return PicoVideoRead8DataL(1);
- case 0x04: return PicoVideoRead8CtlH(1);
- case 0x05: return PicoVideoRead8CtlL(1);
- case 0x08:
- case 0x0c: return get_scanline(1); // FIXME: make it proper
- case 0x09:
- case 0x0d: return Pico.m.rotate++;
- }
- }
- elprintf(EL_ANOMALY, "z80 invalid r8 [%06x] %02x", a, 0xff);
- return 0xff;
- }
- static unsigned char z80_md_bank_read(unsigned short a)
- {
- unsigned int addr68k;
- unsigned char ret;
- z80_subCLeft(3);
- addr68k = Pico.m.z80_bank68k << 15;
- addr68k |= a & 0x7fff;
- ret = m68k_read8(addr68k);
- elprintf(EL_Z80BNK, "z80->68k r8 [%06x] %02x", addr68k, ret);
- return ret;
- }
- static void z80_md_ym2612_write(unsigned int a, unsigned char data)
- {
- if (PicoIn.opt & POPT_EN_FM)
- ym2612_write_local(a, data, 1);
- }
- static void z80_md_vdp_br_write(unsigned int a, unsigned char data)
- {
- if ((a&0xfff9) == 0x7f11) // 7f11 7f13 7f15 7f17
- {
- psg_write_z80(data);
- return;
- }
- // at least VDP data writes hang my machine
- if ((a>>8) == 0x60)
- {
- Pico.m.z80_bank68k >>= 1;
- Pico.m.z80_bank68k |= data << 8;
- Pico.m.z80_bank68k &= 0x1ff; // 9 bits and filled in the new top one
- return;
- }
- elprintf(EL_ANOMALY, "z80 invalid w8 [%06x] %02x", a, data);
- }
- static void z80_md_bank_write(unsigned int a, unsigned char data)
- {
- unsigned int addr68k;
- addr68k = Pico.m.z80_bank68k << 15;
- addr68k += a & 0x7fff;
- elprintf(EL_Z80BNK, "z80->68k w8 [%06x] %02x", addr68k, data);
- m68k_write8(addr68k, data);
- }
- // -----------------------------------------------------------------
- static unsigned char z80_md_in(unsigned short p)
- {
- elprintf(EL_ANOMALY, "Z80 port %04x read", p);
- return 0xff;
- }
- static void z80_md_out(unsigned short p, unsigned char d)
- {
- elprintf(EL_ANOMALY, "Z80 port %04x write %02x", p, d);
- }
- static void z80_mem_setup(void)
- {
- z80_map_set(z80_read_map, 0x0000, 0x1fff, PicoMem.zram, 0);
- z80_map_set(z80_read_map, 0x2000, 0x3fff, PicoMem.zram, 0);
- z80_map_set(z80_read_map, 0x4000, 0x5fff, ym2612_read_local_z80, 1);
- z80_map_set(z80_read_map, 0x6000, 0x7fff, z80_md_vdp_read, 1);
- z80_map_set(z80_read_map, 0x8000, 0xffff, z80_md_bank_read, 1);
- z80_map_set(z80_write_map, 0x0000, 0x1fff, PicoMem.zram, 0);
- z80_map_set(z80_write_map, 0x2000, 0x3fff, PicoMem.zram, 0);
- z80_map_set(z80_write_map, 0x4000, 0x5fff, z80_md_ym2612_write, 1);
- z80_map_set(z80_write_map, 0x6000, 0x7fff, z80_md_vdp_br_write, 1);
- z80_map_set(z80_write_map, 0x8000, 0xffff, z80_md_bank_write, 1);
- #ifdef _USE_DRZ80
- drZ80.z80_in = z80_md_in;
- drZ80.z80_out = z80_md_out;
- #endif
- #ifdef _USE_CZ80
- Cz80_Set_INPort(&CZ80, z80_md_in);
- Cz80_Set_OUTPort(&CZ80, z80_md_out);
- #endif
- }
- // vim:shiftwidth=2:ts=2:expandtab
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