1 // Pico Library - Header File
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3 // (c) Copyright 2004 Dave, All rights reserved.
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4 // (c) Copyright 2006 notaz, All rights reserved.
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5 // Free for non-commercial use.
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7 // For commercial use, separate licencing terms must be obtained.
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16 // to select core, define EMU_C68K, EMU_M68K or EMU_A68K in your makefile
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23 // ----------------------- 68000 CPU -----------------------
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25 #include "../cpu/Cyclone/Cyclone.h"
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26 extern struct Cyclone PicoCpu;
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27 #define SekCyclesLeft PicoCpu.cycles // cycles left for this run
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28 #define SekSetCyclesLeft(c) PicoCpu.cycles=c
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29 #define SekPc (PicoCpu.pc-PicoCpu.membase)
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33 void __cdecl M68000_RUN();
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34 // The format of the data in a68k.asm (at the _M68000_regs location)
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37 unsigned int d[8],a[8];
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38 unsigned int isp,srh,ccr,xc,pc,irq,sr;
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39 int (*IrqCallback) (int nIrq);
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41 void *pResetCallback;
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42 unsigned int sfc,dfc,usp,vbr;
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43 unsigned int AsmBank,CpuVersion;
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45 struct A68KContext M68000_regs;
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46 extern int m68k_ICount;
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47 #define SekCyclesLeft m68k_ICount
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48 #define SekSetCyclesLeft(c) m68k_ICount=c
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49 #define SekPc M68000_regs.pc
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53 #include "../cpu/musashi/m68kcpu.h"
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54 extern m68ki_cpu_core PicoM68kCPU; // MD's CPU
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55 extern m68ki_cpu_core PicoS68kCPU; // Mega CD's CPU
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56 #ifndef SekCyclesLeft
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57 #define SekCyclesLeft m68k_cycles_remaining()
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58 #define SekSetCyclesLeft(c) SET_CYCLES(c)
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59 #define SekPc m68k_get_reg(&PicoM68kCPU, M68K_REG_PC)
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60 #define SekPcS68k m68k_get_reg(&PicoS68kCPU, M68K_REG_PC)
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64 extern int SekCycleCnt; // cycles done in this frame
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65 extern int SekCycleAim; // cycle aim
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66 extern unsigned int SekCycleCntT; // total cycle counter, updated once per frame
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68 #define SekCyclesReset() {SekCycleCntT+=SekCycleCnt;SekCycleCnt=SekCycleAim=0;}
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69 #define SekCyclesBurn(c) SekCycleCnt+=c
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70 #define SekCyclesDone() (SekCycleAim-SekCyclesLeft) // nuber of cycles done in this frame (can be checked anywhere)
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71 #define SekCyclesDoneT() (SekCycleCntT+SekCyclesDone()) // total nuber of cycles done for this rom
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73 #define SekEndRun(after) { \
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74 SekCycleCnt -= SekCyclesLeft - after; \
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75 if(SekCycleCnt < 0) SekCycleCnt = 0; \
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76 SekSetCyclesLeft(after); \
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79 extern int SekCycleCntS68k;
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80 extern int SekCycleAimS68k;
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82 #define SekCyclesResetS68k() {SekCycleCntS68k=SekCycleAimS68k=0;}
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84 // does not work as expected
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85 //extern int z80ExtraCycles; // extra z80 cycles, used when z80 is [en|dis]abled
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89 // ---------------------------------------------------------
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91 // main oscillator clock which controls timing
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92 #define OSC_NTSC 53693100
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93 #define OSC_PAL 53203424 // not accurate
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97 unsigned char reg[0x20];
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98 unsigned int command; // 32-bit Command
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99 unsigned char pending; // 1 if waiting for second half of 32-bit command
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100 unsigned char type; // Command type (v/c/vsram read/write)
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101 unsigned short addr; // Read/Write address
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102 int status; // Status bits
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103 unsigned char pending_ints; // pending interrupts: ??VH????
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104 unsigned char pad[0x13];
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109 unsigned char rotate;
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110 unsigned char z80Run;
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111 unsigned char padTHPhase[2]; // phase of gamepad TH switches
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112 short scanline; // 0 to 261||311; -1 in fast mode
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113 char dirtyPal; // Is the palette dirty (1 - change @ this frame, 2 - some time before)
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114 unsigned char hardware; // Hardware value for country
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115 unsigned char pal; // 1=PAL 0=NTSC
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116 unsigned char sram_reg; // SRAM mode register. bit0: allow read? bit1: deny write? bit2: EEPROM?
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117 unsigned short z80_bank68k;
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118 unsigned short z80_lastaddr; // this is for Z80 faking
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119 unsigned char z80_fakeval;
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120 unsigned char pad0;
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121 unsigned char padDelay[2]; // gamepad phase time outs, so we count a delay
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122 unsigned short sram_addr; // EEPROM address register
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123 unsigned char sram_cycle; // EEPROM SRAM cycle number
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124 unsigned char sram_slave; // EEPROM slave word for X24C02 and better SRAMs
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125 unsigned char prot_bytes[2]; // simple protection fakeing
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126 unsigned short dma_bytes; //
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127 unsigned char pad[2];
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128 unsigned int frame_count; // mainly for movies
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131 // some assembly stuff depend on these, do not touch!
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134 unsigned char ram[0x10000]; // 0x00000 scratch ram
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135 unsigned short vram[0x8000]; // 0x10000
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136 unsigned char zram[0x2000]; // 0x20000 Z80 ram
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137 unsigned char ioports[0x10];
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138 unsigned int pad[0x3c]; // unused
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139 unsigned short cram[0x40]; // 0x22100
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140 unsigned short vsram[0x40]; // 0x22180
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142 unsigned char *rom; // 0x22200
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143 unsigned int romsize; // 0x22204
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146 struct PicoVideo video;
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152 unsigned char *data; // actual data
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153 unsigned int start; // start address in 68k address space
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155 unsigned char resize; // 1=SRAM size changed and needs to be reallocated on PicoReset
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156 unsigned char reg_back; // copy of Pico.m.sram_reg to set after reset
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157 unsigned char changed;
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162 #include "cd/cd_sys.h"
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163 #include "cd/LC89510.h"
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167 unsigned short hint_vector;
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168 unsigned char busreq;
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169 unsigned char pad0;
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175 unsigned char bios[0x20000];
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177 unsigned char prg_ram[0x80000];
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178 unsigned char prg_ram_b[4][0x20000];
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180 unsigned char word_ram[0x40000];
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181 unsigned char s68k_regs[0x200];
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188 #define Pico_mcd ((mcd_state *)Pico.rom)
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192 int PicoLine(int scan);
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193 void PicoFrameStart();
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196 void PicoFrameFull();
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199 int PicoInitPc(unsigned int pc);
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200 unsigned int CPU_CALL PicoRead32(unsigned int a);
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202 void PicoMemReset();
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203 void PicoDasm(int start,int len);
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204 unsigned char z80_read(unsigned short a);
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205 unsigned short z80_read16(unsigned short a);
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206 void z80_write(unsigned char data, unsigned short a);
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207 void z80_write16(unsigned short data, unsigned short a);
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210 unsigned char PicoReadCD8 (unsigned int a);
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211 unsigned short PicoReadCD16(unsigned int a);
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212 unsigned int PicoReadCD32(unsigned int a);
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213 void PicoWriteCD8 (unsigned int a, unsigned char d);
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214 void PicoWriteCD16(unsigned int a, unsigned short d);
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215 void PicoWriteCD32(unsigned int a, unsigned int d);
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218 extern struct Pico Pico;
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219 extern struct PicoSRAM SRam;
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220 extern int emustatus;
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221 int CheckDMA(void);
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224 int PicoInitMCD(void);
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225 void PicoExitMCD(void);
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226 int PicoResetMCD(int hard);
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230 int SekReset(void);
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231 int SekInterrupt(int irq);
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232 void SekState(unsigned char *data);
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235 int SekInitS68k(void);
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236 int SekResetS68k(void);
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237 int SekInterruptS68k(int irq);
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240 void PicoVideoWrite(unsigned int a,unsigned short d);
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241 unsigned int PicoVideoRead(unsigned int a);
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244 void SRAMWriteEEPROM(unsigned int d);
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245 unsigned int SRAMReadEEPROM();
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246 void SRAMUpdPending(unsigned int a, unsigned int d);
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250 } // End of extern "C"
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