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 or project
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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, PicoCpuS68k;
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27 #define SekCyclesLeftNoMCD PicoCpu.cycles // cycles left for this run
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28 #define SekCyclesLeft \
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29 (((PicoMCD&1) && (PicoOpt & 0x2000)) ? (SekCycleAim-SekCycleCnt) : SekCyclesLeftNoMCD)
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30 #define SekSetCyclesLeftNoMCD(c) PicoCpu.cycles=c
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31 #define SekSetCyclesLeft(c) { \
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32 if ((PicoMCD&1) && (PicoOpt & 0x2000)) SekCycleCnt=SekCycleAim-(c); else SekSetCyclesLeftNoMCD(c); \
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34 #define SekPc (PicoCpu.pc-PicoCpu.membase)
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35 #define SekPcS68k (PicoCpuS68k.pc-PicoCpuS68k.membase)
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39 void __cdecl M68000_RUN();
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40 // The format of the data in a68k.asm (at the _M68000_regs location)
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43 unsigned int d[8],a[8];
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44 unsigned int isp,srh,ccr,xc,pc,irq,sr;
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45 int (*IrqCallback) (int nIrq);
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47 void *pResetCallback;
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48 unsigned int sfc,dfc,usp,vbr;
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49 unsigned int AsmBank,CpuVersion;
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51 struct A68KContext M68000_regs;
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52 extern int m68k_ICount;
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53 #define SekCyclesLeft m68k_ICount
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54 #define SekSetCyclesLeft(c) m68k_ICount=c
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55 #define SekPc M68000_regs.pc
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59 #include "../cpu/musashi/m68kcpu.h"
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60 extern m68ki_cpu_core PicoM68kCPU; // MD's CPU
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61 extern m68ki_cpu_core PicoS68kCPU; // Mega CD's CPU
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62 #ifndef SekCyclesLeft
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63 #define SekCyclesLeftNoMCD m68k_cycles_remaining()
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64 #define SekCyclesLeft \
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65 (((PicoMCD&1) && (PicoOpt & 0x2000)) ? (SekCycleAim-SekCycleCnt) : SekCyclesLeftNoMCD)
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66 #define SekSetCyclesLeftNoMCD(c) SET_CYCLES(c)
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67 #define SekSetCyclesLeft(c) { \
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68 if ((PicoMCD&1) && (PicoOpt & 0x2000)) SekCycleCnt=SekCycleAim-(c); else SET_CYCLES(c); \
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70 #define SekPc m68k_get_reg(&PicoM68kCPU, M68K_REG_PC)
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71 #define SekPcS68k m68k_get_reg(&PicoS68kCPU, M68K_REG_PC)
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75 extern int SekCycleCnt; // cycles done in this frame
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76 extern int SekCycleAim; // cycle aim
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77 extern unsigned int SekCycleCntT; // total cycle counter, updated once per frame
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79 #define SekCyclesReset() {SekCycleCntT+=SekCycleCnt;SekCycleCnt=SekCycleAim=0;}
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80 #define SekCyclesBurn(c) SekCycleCnt+=c
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81 #define SekCyclesDone() (SekCycleAim-SekCyclesLeft) // nuber of cycles done in this frame (can be checked anywhere)
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82 #define SekCyclesDoneT() (SekCycleCntT+SekCyclesDone()) // total nuber of cycles done for this rom
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84 #define SekEndRun(after) { \
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85 SekCycleCnt -= SekCyclesLeft - after; \
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86 if(SekCycleCnt < 0) SekCycleCnt = 0; \
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87 SekSetCyclesLeft(after); \
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90 extern int SekCycleCntS68k;
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91 extern int SekCycleAimS68k;
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93 #define SekCyclesResetS68k() {SekCycleCntS68k=SekCycleAimS68k=0;}
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95 // does not work as expected
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96 //extern int z80ExtraCycles; // extra z80 cycles, used when z80 is [en|dis]abled
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100 // ---------------------------------------------------------
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102 // main oscillator clock which controls timing
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103 #define OSC_NTSC 53693100
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104 #define OSC_PAL 53203424 // not accurate
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108 unsigned char reg[0x20];
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109 unsigned int command; // 32-bit Command
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110 unsigned char pending; // 1 if waiting for second half of 32-bit command
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111 unsigned char type; // Command type (v/c/vsram read/write)
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112 unsigned short addr; // Read/Write address
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113 int status; // Status bits
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114 unsigned char pending_ints; // pending interrupts: ??VH????
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115 unsigned char pad[0x13];
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120 unsigned char rotate;
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121 unsigned char z80Run;
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122 unsigned char padTHPhase[2]; // phase of gamepad TH switches
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123 short scanline; // 0 to 261||311; -1 in fast mode
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124 char dirtyPal; // Is the palette dirty (1 - change @ this frame, 2 - some time before)
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125 unsigned char hardware; // Hardware value for country
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126 unsigned char pal; // 1=PAL 0=NTSC
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127 unsigned char sram_reg; // SRAM mode register. bit0: allow read? bit1: deny write? bit2: EEPROM?
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128 unsigned short z80_bank68k;
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129 unsigned short z80_lastaddr; // this is for Z80 faking
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130 unsigned char z80_fakeval;
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131 unsigned char pad0;
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132 unsigned char padDelay[2]; // gamepad phase time outs, so we count a delay
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133 unsigned short sram_addr; // EEPROM address register
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134 unsigned char sram_cycle; // EEPROM SRAM cycle number
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135 unsigned char sram_slave; // EEPROM slave word for X24C02 and better SRAMs
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136 unsigned char prot_bytes[2]; // simple protection fakeing
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137 unsigned short dma_bytes; //
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138 unsigned char pad[2];
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139 unsigned int frame_count; // mainly for movies
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142 // some assembly stuff depend on these, do not touch!
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145 unsigned char ram[0x10000]; // 0x00000 scratch ram
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146 unsigned short vram[0x8000]; // 0x10000
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147 unsigned char zram[0x2000]; // 0x20000 Z80 ram
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148 unsigned char ioports[0x10];
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149 unsigned int pad[0x3c]; // unused
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150 unsigned short cram[0x40]; // 0x22100
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151 unsigned short vsram[0x40]; // 0x22180
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153 unsigned char *rom; // 0x22200
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154 unsigned int romsize; // 0x22204
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157 struct PicoVideo video;
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163 unsigned char *data; // actual data
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164 unsigned int start; // start address in 68k address space
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166 unsigned char resize; // 1=SRAM size changed and needs to be reallocated on PicoReset
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167 unsigned char reg_back; // copy of Pico.m.sram_reg to set after reset
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168 unsigned char changed;
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173 #include "cd/cd_sys.h"
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174 #include "cd/LC89510.h"
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175 #include "cd/gfx_cd.h"
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179 unsigned char control; // reg7
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180 unsigned char enabled; // reg8
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181 unsigned char cur_ch;
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182 unsigned char bank;
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187 unsigned char regs[8];
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188 unsigned int addr; // played sample address
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195 unsigned short hint_vector;
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196 unsigned char busreq;
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197 unsigned char s68k_pend_ints;
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198 unsigned int state_flags; // emu state: reset_pending,
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199 unsigned int counter75hz;
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200 unsigned short audio_offset; // for savestates: play pointer offset (0-1023)
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201 unsigned char audio_track; // playing audio track # (zero based)
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204 unsigned int timer_stopwatch;
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210 unsigned char bios[0x20000]; // 128K
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212 unsigned char prg_ram[0x80000];
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213 unsigned char prg_ram_b[4][0x20000];
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217 unsigned char word_ram2M[0x40000];
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218 unsigned char unused[0x20000];
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221 unsigned char unused[0x20000];
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222 unsigned char word_ram1M[2][0x20000];
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226 unsigned char pcm_ram[0x10000];
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227 unsigned char pcm_ram_b[0x10][0x1000];
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229 unsigned char bram[0x2000]; // 8K
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230 unsigned char s68k_regs[0x200]; // GA, not CPU regs
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231 struct mcd_pcm pcm;
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232 _scd_toc TOC; // not to be saved
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240 #define Pico_mcd ((mcd_state *)Pico.rom)
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243 int PicoAreaPackCpu(unsigned char *cpu, int is_sub);
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244 int PicoAreaUnpackCpu(unsigned char *cpu, int is_sub);
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247 int PicoCdSaveState(void *file);
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248 int PicoCdLoadState(void *file);
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249 int PicoCdLoadStateGfx(void *file);
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252 int PicoLine(int scan);
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253 void PicoFrameStart();
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256 void PicoFrameFull();
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259 int PicoInitPc(unsigned int pc);
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260 unsigned int CPU_CALL PicoRead32(unsigned int a);
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261 void PicoMemSetup();
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262 void PicoMemReset();
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263 //void PicoDasm(int start,int len);
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264 unsigned char z80_read(unsigned short a);
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265 unsigned short z80_read16(unsigned short a);
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266 void z80_write(unsigned char data, unsigned short a);
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267 void z80_write16(unsigned short data, unsigned short a);
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270 void PicoMemSetupCD(void);
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271 unsigned char PicoReadCD8 (unsigned int a);
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272 unsigned short PicoReadCD16(unsigned int a);
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273 unsigned int PicoReadCD32(unsigned int a);
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274 void PicoWriteCD8 (unsigned int a, unsigned char d);
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275 void PicoWriteCD16(unsigned int a, unsigned short d);
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276 void PicoWriteCD32(unsigned int a, unsigned int d);
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279 extern struct Pico Pico;
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280 extern struct PicoSRAM SRam;
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281 extern int emustatus;
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282 int CheckDMA(void);
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285 int PicoInitMCD(void);
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286 void PicoExitMCD(void);
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287 int PicoResetMCD(int hard);
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291 int SekReset(void);
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292 int SekInterrupt(int irq);
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293 void SekState(unsigned char *data);
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296 int SekInitS68k(void);
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297 int SekResetS68k(void);
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298 int SekInterruptS68k(int irq);
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301 extern int PsndLen_exc_cnt;
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302 extern int PsndLen_exc_add;
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305 void PicoVideoWrite(unsigned int a,unsigned short d);
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306 unsigned int PicoVideoRead(unsigned int a);
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309 void SRAMWriteEEPROM(unsigned int d);
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310 unsigned int SRAMReadEEPROM();
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311 void SRAMUpdPending(unsigned int a, unsigned int d);
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312 void memcpy16(unsigned short *dest, unsigned short *src, int count);
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313 void memcpy16bswap(unsigned short *dest, void *src, int count);
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314 void memcpy32(int *dest, int *src, int count);
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315 void memset32(int *dest, int c, int count);
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318 void wram_2M_to_1M(unsigned char *m);
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319 void wram_1M_to_2M(unsigned char *m);
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323 } // End of extern "C"
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