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- // Pico Library - Header File
- // (c) Copyright 2004 Dave, All rights reserved.
- // (c) Copyright 2006 notaz, All rights reserved.
- // Free for non-commercial use.
- // For commercial use, separate licencing terms must be obtained.
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include "Pico.h"
- // to select core, define EMU_C68K, EMU_M68K or EMU_A68K in your makefile or project
- #ifdef __cplusplus
- extern "C" {
- #endif
- // ----------------------- 68000 CPU -----------------------
- #ifdef EMU_C68K
- #include "../cpu/Cyclone/Cyclone.h"
- extern struct Cyclone PicoCpu, PicoCpuS68k;
- #define SekCyclesLeft PicoCpu.cycles // cycles left for this run
- #define SekSetCyclesLeft(c) PicoCpu.cycles=c
- #define SekPc (PicoCpu.pc-PicoCpu.membase)
- #define SekPcS68k (PicoCpuS68k.pc-PicoCpuS68k.membase)
- #endif
- #ifdef EMU_A68K
- void __cdecl M68000_RUN();
- // The format of the data in a68k.asm (at the _M68000_regs location)
- struct A68KContext
- {
- unsigned int d[8],a[8];
- unsigned int isp,srh,ccr,xc,pc,irq,sr;
- int (*IrqCallback) (int nIrq);
- unsigned int ppc;
- void *pResetCallback;
- unsigned int sfc,dfc,usp,vbr;
- unsigned int AsmBank,CpuVersion;
- };
- struct A68KContext M68000_regs;
- extern int m68k_ICount;
- #define SekCyclesLeft m68k_ICount
- #define SekSetCyclesLeft(c) m68k_ICount=c
- #define SekPc M68000_regs.pc
- #endif
- #ifdef EMU_M68K
- #include "../cpu/musashi/m68kcpu.h"
- extern m68ki_cpu_core PicoM68kCPU; // MD's CPU
- extern m68ki_cpu_core PicoS68kCPU; // Mega CD's CPU
- #ifndef SekCyclesLeft
- #define SekCyclesLeft m68k_cycles_remaining()
- #define SekSetCyclesLeft(c) SET_CYCLES(c)
- #define SekPc m68k_get_reg(&PicoM68kCPU, M68K_REG_PC)
- #define SekPcS68k m68k_get_reg(&PicoS68kCPU, M68K_REG_PC)
- #endif
- #endif
- extern int SekCycleCnt; // cycles done in this frame
- extern int SekCycleAim; // cycle aim
- extern unsigned int SekCycleCntT; // total cycle counter, updated once per frame
- #define SekCyclesReset() {SekCycleCntT+=SekCycleCnt;SekCycleCnt=SekCycleAim=0;}
- #define SekCyclesBurn(c) SekCycleCnt+=c
- #define SekCyclesDone() (SekCycleAim-SekCyclesLeft) // nuber of cycles done in this frame (can be checked anywhere)
- #define SekCyclesDoneT() (SekCycleCntT+SekCyclesDone()) // total nuber of cycles done for this rom
- #define SekEndRun(after) { \
- SekCycleCnt -= SekCyclesLeft - after; \
- if(SekCycleCnt < 0) SekCycleCnt = 0; \
- SekSetCyclesLeft(after); \
- }
- extern int SekCycleCntS68k;
- extern int SekCycleAimS68k;
- #define SekCyclesResetS68k() {SekCycleCntS68k=SekCycleAimS68k=0;}
- // does not work as expected
- //extern int z80ExtraCycles; // extra z80 cycles, used when z80 is [en|dis]abled
- extern int PicoMCD;
- // ---------------------------------------------------------
- // main oscillator clock which controls timing
- #define OSC_NTSC 53693100
- #define OSC_PAL 53203424 // not accurate
- struct PicoVideo
- {
- unsigned char reg[0x20];
- unsigned int command; // 32-bit Command
- unsigned char pending; // 1 if waiting for second half of 32-bit command
- unsigned char type; // Command type (v/c/vsram read/write)
- unsigned short addr; // Read/Write address
- int status; // Status bits
- unsigned char pending_ints; // pending interrupts: ??VH????
- unsigned char pad[0x13];
- };
- struct PicoMisc
- {
- unsigned char rotate;
- unsigned char z80Run;
- unsigned char padTHPhase[2]; // phase of gamepad TH switches
- short scanline; // 0 to 261||311; -1 in fast mode
- char dirtyPal; // Is the palette dirty (1 - change @ this frame, 2 - some time before)
- unsigned char hardware; // Hardware value for country
- unsigned char pal; // 1=PAL 0=NTSC
- unsigned char sram_reg; // SRAM mode register. bit0: allow read? bit1: deny write? bit2: EEPROM?
- unsigned short z80_bank68k;
- unsigned short z80_lastaddr; // this is for Z80 faking
- unsigned char z80_fakeval;
- unsigned char pad0;
- unsigned char padDelay[2]; // gamepad phase time outs, so we count a delay
- unsigned short sram_addr; // EEPROM address register
- unsigned char sram_cycle; // EEPROM SRAM cycle number
- unsigned char sram_slave; // EEPROM slave word for X24C02 and better SRAMs
- unsigned char prot_bytes[2]; // simple protection fakeing
- unsigned short dma_bytes; //
- unsigned char pad[2];
- unsigned int frame_count; // mainly for movies
- };
- // some assembly stuff depend on these, do not touch!
- struct Pico
- {
- unsigned char ram[0x10000]; // 0x00000 scratch ram
- unsigned short vram[0x8000]; // 0x10000
- unsigned char zram[0x2000]; // 0x20000 Z80 ram
- unsigned char ioports[0x10];
- unsigned int pad[0x3c]; // unused
- unsigned short cram[0x40]; // 0x22100
- unsigned short vsram[0x40]; // 0x22180
- unsigned char *rom; // 0x22200
- unsigned int romsize; // 0x22204
- struct PicoMisc m;
- struct PicoVideo video;
- };
- // sram
- struct PicoSRAM
- {
- unsigned char *data; // actual data
- unsigned int start; // start address in 68k address space
- unsigned int end;
- unsigned char resize; // 1=SRAM size changed and needs to be reallocated on PicoReset
- unsigned char reg_back; // copy of Pico.m.sram_reg to set after reset
- unsigned char changed;
- unsigned char pad;
- };
- // MCD
- #include "cd/cd_sys.h"
- #include "cd/LC89510.h"
- #include "cd/gfx_cd.h"
- struct mcd_pcm
- {
- unsigned char control; // reg7
- unsigned char enabled; // reg8
- unsigned char cur_ch;
- unsigned char bank;
- int pad1;
- struct pcm_chan
- {
- unsigned char regs[8];
- unsigned int addr; // played sample address
- int pad;
- } ch[8];
- };
- struct mcd_misc
- {
- unsigned short hint_vector;
- unsigned char busreq;
- unsigned char s68k_pend_ints;
- unsigned int state_flags; // emu state: reset_pending,
- unsigned int counter75hz;
- unsigned short audio_offset; // for savestates: play pointer offset (0-1023)
- unsigned char audio_track; // playing audio track # (zero based)
- char pad1;
- int timer_int3;
- unsigned int timer_stopwatch;
- int pad[10];
- };
- typedef struct
- {
- unsigned char bios[0x20000]; // 128K
- union { // 512K
- unsigned char prg_ram[0x80000];
- unsigned char prg_ram_b[4][0x20000];
- };
- union { // 256K
- struct {
- unsigned char word_ram2M[0x40000];
- unsigned char unused[0x20000];
- };
- struct {
- unsigned char unused[0x20000];
- unsigned char word_ram1M[2][0x20000];
- };
- };
- union { // 64K
- unsigned char pcm_ram[0x10000];
- unsigned char pcm_ram_b[0x10][0x1000];
- };
- unsigned char bram[0x2000]; // 8K
- unsigned char s68k_regs[0x200]; // GA, not CPU regs
- struct mcd_pcm pcm;
- _scd_toc TOC; // not to be saved
- CDD cdd;
- CDC cdc;
- _scd scd;
- Rot_Comp rot_comp;
- struct mcd_misc m;
- } mcd_state;
- #define Pico_mcd ((mcd_state *)Pico.rom)
- // Area.c
- int PicoAreaPackCpu(unsigned char *cpu, int is_sub);
- int PicoAreaUnpackCpu(unsigned char *cpu, int is_sub);
- // cd/Area.c
- int PicoCdSaveState(void *file);
- int PicoCdLoadState(void *file);
- int PicoCdLoadStateGfx(void *file);
- // Draw.c
- int PicoLine(int scan);
- void PicoFrameStart();
- // Draw2.c
- void PicoFrameFull();
- // Memory.c
- int PicoInitPc(unsigned int pc);
- unsigned int CPU_CALL PicoRead32(unsigned int a);
- void PicoMemSetup();
- void PicoMemReset();
- //void PicoDasm(int start,int len);
- unsigned char z80_read(unsigned short a);
- unsigned short z80_read16(unsigned short a);
- void z80_write(unsigned char data, unsigned short a);
- void z80_write16(unsigned short data, unsigned short a);
- // cd/Memory.c
- void PicoMemSetupCD(void);
- unsigned char PicoReadCD8 (unsigned int a);
- unsigned short PicoReadCD16(unsigned int a);
- unsigned int PicoReadCD32(unsigned int a);
- void PicoWriteCD8 (unsigned int a, unsigned char d);
- void PicoWriteCD16(unsigned int a, unsigned short d);
- void PicoWriteCD32(unsigned int a, unsigned int d);
- // Pico.c
- extern struct Pico Pico;
- extern struct PicoSRAM SRam;
- extern int emustatus;
- int CheckDMA(void);
- // cd/Pico.c
- int PicoInitMCD(void);
- void PicoExitMCD(void);
- int PicoResetMCD(int hard);
- // Sek.c
- int SekInit(void);
- int SekReset(void);
- int SekInterrupt(int irq);
- void SekState(unsigned char *data);
- // cd/Sek.c
- int SekInitS68k(void);
- int SekResetS68k(void);
- int SekInterruptS68k(int irq);
- // sound/sound.c
- extern int PsndLen_exc_cnt;
- extern int PsndLen_exc_add;
- // VideoPort.c
- void PicoVideoWrite(unsigned int a,unsigned short d);
- unsigned int PicoVideoRead(unsigned int a);
- // Misc.c
- void SRAMWriteEEPROM(unsigned int d);
- unsigned int SRAMReadEEPROM();
- void SRAMUpdPending(unsigned int a, unsigned int d);
- void memcpy16(unsigned short *dest, unsigned short *src, int count);
- void memcpy32(int *dest, int *src, int count);
- void memset32(int *dest, int c, int count);
- // cd/Misc.c
- void wram_2M_to_1M(unsigned char *m);
- void wram_1M_to_2M(unsigned char *m);
- #ifdef __cplusplus
- } // End of extern "C"
- #endif
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