1 // This is part of Pico Library
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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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10 #include "PicoInt.h"
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11 #include "sound/ym2612.h"
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15 int PicoOpt=0; // disable everything by default
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16 int PicoSkipFrame=0; // skip rendering frame?
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17 int PicoRegionOverride = 0; // override the region detection 0: Auto, 1: Japan NTSC, 2: Japan PAL, 4: US, 8: Europe
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18 int PicoAutoRgnOrder = 0;
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20 void (*PicoWriteSound)(int len) = 0; // called once per frame at the best time to send sound buffer (PsndOut) to hardware
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22 struct PicoSRAM SRam;
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23 int z80startCycle, z80stopCycle; // in 68k cycles
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24 //int z80ExtraCycles = 0;
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25 int PicoPad[2]; // Joypads, format is SACB RLDU
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26 int PicoMCD = 0; // mega CD status: scd_started, reset_pending
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28 // to be called once on emu init
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31 // Blank space for state:
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32 memset(&Pico,0,sizeof(Pico));
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33 memset(&PicoPad,0,sizeof(PicoPad));
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37 z80_init(); // init even if we aren't going to use it
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47 // to be called once on emu exit
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54 if(SRam.data) free(SRam.data); SRam.data=0;
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57 int PicoReset(int hard)
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59 unsigned int region=0;
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60 int support=0,hw=0,i=0;
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61 unsigned char pal=0;
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63 if (Pico.romsize<=0) return 1;
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65 // setup correct memory map
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68 else PicoMemSetup();
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71 // s68k doesn't have the TAS quirk, so we just globally set normal TAS handler in MCD mode (used by Batman games).
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72 SekSetRealTAS(PicoMCD & 1);
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76 // reset VDP state, VRAM and PicoMisc
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77 //memset(&Pico.video,0,sizeof(Pico.video));
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78 //memset(&Pico.vram,0,sizeof(Pico.vram));
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79 memset(Pico.ioports,0,sizeof(Pico.ioports)); // needed for MCD to reset properly
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80 memset(&Pico.m,0,sizeof(Pico.m));
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81 Pico.video.pending_ints=0;
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85 // clear all memory of the emulated machine
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86 memset(&Pico.ram,0,(unsigned int)&Pico.rom-(unsigned int)&Pico.ram);
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89 // default VDP register values (based on Fusion)
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90 Pico.video.reg[0] = Pico.video.reg[1] = 0x04;
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91 Pico.video.reg[0xc] = 0x81;
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92 Pico.video.reg[0xf] = 0x02;
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93 Pico.m.dirtyPal = 1;
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95 if(PicoRegionOverride)
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97 support = PicoRegionOverride;
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101 // Read cartridge region data:
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102 region=PicoRead32(0x1f0);
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108 c=region>>(i<<3); c&=0xff;
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109 if (c<=' ') continue;
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111 if (c=='J') support|=1;
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112 else if (c=='U') support|=4;
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113 else if (c=='E') support|=8;
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114 else if (c=='j') {support|=1; break; }
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115 else if (c=='u') {support|=4; break; }
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116 else if (c=='e') {support|=8; break; }
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122 support|=strtol(s,NULL,16);
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127 // auto detection order override
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128 if (PicoAutoRgnOrder) {
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129 if (((PicoAutoRgnOrder>>0)&0xf) & support) support = (PicoAutoRgnOrder>>0)&0xf;
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130 else if (((PicoAutoRgnOrder>>4)&0xf) & support) support = (PicoAutoRgnOrder>>4)&0xf;
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131 else if (((PicoAutoRgnOrder>>8)&0xf) & support) support = (PicoAutoRgnOrder>>8)&0xf;
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134 // Try to pick the best hardware value for English/50hz:
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135 if (support&8) { hw=0xc0; pal=1; } // Europe
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136 else if (support&4) hw=0x80; // USA
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137 else if (support&2) { hw=0x40; pal=1; } // Japan PAL
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138 else if (support&1) hw=0x00; // Japan NTSC
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139 else hw=0x80; // USA
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141 Pico.m.hardware=(unsigned char)(hw|0x20); // No disk attached
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143 Pico.video.status = 0x3408 | pal; // always set bits | vblank | pal
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145 sound_reset(); // pal must be known here
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148 PicoResetMCD(hard);
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154 if(SRam.data) free(SRam.data); SRam.data=0;
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155 Pico.m.sram_reg = 0;
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157 if(*(Pico.rom+0x1B1) == 'R' && *(Pico.rom+0x1B0) == 'A') {
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158 if(*(Pico.rom+0x1B2) & 0x40) {
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160 // what kind of EEPROMs are actually used? X24C02? X24C04? (X24C01 has only 128), but we will support up to 8K
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161 SRam.start = PicoRead32(0x1B4) & ~1; // zero address is used for clock by some games
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162 SRam.end = PicoRead32(0x1B8);
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163 sram_size = 0x2000;
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164 Pico.m.sram_reg = 4;
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167 SRam.start = PicoRead32(0x1B4) & 0xFFFF00;
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168 SRam.end = PicoRead32(0x1B8) | 1;
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169 sram_size = SRam.end - SRam.start + 1;
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171 Pico.m.sram_reg |= 0x10; // SRAM was detected
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173 if(sram_size <= 0) {
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174 // some games may have bad headers, like S&K and Sonic3
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175 SRam.start = 0x200000;
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176 SRam.end = 0x203FFF;
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177 sram_size = 0x004000;
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180 // enable sram access by default if it doesn't overlap with ROM
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181 if(Pico.romsize <= SRam.start) Pico.m.sram_reg |= 1;
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182 SRam.reg_back = Pico.m.sram_reg;
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185 SRam.data = (unsigned char *) calloc(sram_size, 1);
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186 if(!SRam.data) return 1;
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189 // Dino Dini's Soccer malfunctions if SRAM is not filled with 0xff
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190 if (strncmp((char *)Pico.rom+0x150, "IDOND NI'I", 10) == 0)
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191 memset(SRam.data, 0xff, sram_size);
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192 elprintf(EL_STATUS, "sram: det: %i; eeprom: %i; start: %06x; end: %06x",
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193 (Pico.m.sram_reg>>4)&1, (Pico.m.sram_reg>>2)&1, SRam.start, SRam.end);
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196 Pico.m.sram_reg = SRam.reg_back; // restore sram_reg
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202 // dma2vram settings are just hacks to unglitch Legend of Galahad (needs <= 104 to work)
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203 // same for Outrunners (92-121, when active is set to 24)
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204 static const int dma_timings[] = {
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205 83, 167, 166, 83, // vblank: 32cell: dma2vram dma2[vs|c]ram vram_fill vram_copy
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206 102, 205, 204, 102, // vblank: 40cell:
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207 16, 16, 15, 8, // active: 32cell:
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208 24, 18, 17, 9 // ...
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211 static const int dma_bsycles[] = {
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212 (488<<8)/82, (488<<8)/167, (488<<8)/166, (488<<8)/83,
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213 (488<<8)/102, (488<<8)/205, (488<<8)/204, (488<<8)/102,
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214 (488<<8)/16, (488<<8)/16, (488<<8)/15, (488<<8)/8,
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215 (488<<8)/24, (488<<8)/18, (488<<8)/17, (488<<8)/9
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218 PICO_INTERNAL int CheckDMA(void)
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220 int burn = 0, xfers_can, dma_op = Pico.video.reg[0x17]>>6; // see gens for 00 and 01 modes
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221 int xfers = Pico.m.dma_xfers;
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224 if(!(dma_op&2)) dma_op = (Pico.video.type==1) ? 0 : 1; // setting dma_timings offset here according to Gens
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226 if(Pico.video.reg[12] & 1) dma_op |= 4; // 40 cell mode?
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227 if(!(Pico.video.status&8)&&(Pico.video.reg[1]&0x40)) dma_op|=8; // active display?
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228 xfers_can = dma_timings[dma_op];
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229 if(xfers <= xfers_can) {
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230 if(dma_op&2) Pico.video.status&=~2; // dma no longer busy
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232 burn = xfers * dma_bsycles[dma_op] >> 8; // have to be approximate because can't afford division..
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234 Pico.m.dma_xfers = 0;
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236 if(!(dma_op&2)) burn = 488;
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237 Pico.m.dma_xfers -= xfers_can;
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240 elprintf(EL_VDPDMA, "~Dma %i op=%i can=%i burn=%i [%i]", Pico.m.dma_xfers, dma_op1, xfers_can, burn, SekCyclesDone());
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241 //dprintf("~aim: %i, cnt: %i", SekCycleAim, SekCycleCnt);
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245 static __inline void SekRun(int cyc)
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249 //printf("aim: %i, cnt: %i\n", SekCycleAim, SekCycleCnt);
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250 if((cyc_do=SekCycleAim-SekCycleCnt) <= 0) return;
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251 //printf("cyc_do: %i\n", cyc_do);
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252 #if defined(EMU_C68K) && defined(EMU_M68K)
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253 // this means we do run-compare Cyclone vs Musashi
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254 SekCycleCnt+=CM_compareRun(cyc_do);
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255 #elif defined(EMU_C68K)
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256 PicoCpu.cycles=cyc_do;
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257 CycloneRun(&PicoCpu);
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258 SekCycleCnt+=cyc_do-PicoCpu.cycles;
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259 #elif defined(EMU_A68K)
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260 m68k_ICount=cyc_do;
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262 SekCycleCnt+=cyc_do-m68k_ICount;
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263 #elif defined(EMU_M68K)
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264 SekCycleCnt+=m68k_execute(cyc_do);
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268 static __inline void SekStep(void)
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270 // this is required for timing sensitive stuff to work
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271 int realaim=SekCycleAim; SekCycleAim=SekCycleCnt+1;
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272 #if defined(EMU_C68K) && defined(EMU_M68K)
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273 // this means we do run-compare Cyclone vs Musashi
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274 SekCycleCnt+=CM_compareRun(1);
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275 #elif defined(EMU_C68K)
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277 CycloneRun(&PicoCpu);
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278 SekCycleCnt+=1-PicoCpu.cycles;
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279 #elif defined(EMU_A68K)
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282 SekCycleCnt+=1-m68k_ICount;
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283 #elif defined(EMU_M68K)
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284 SekCycleCnt+=m68k_execute(1);
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286 SekCycleAim=realaim;
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289 static int CheckIdle(void)
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292 unsigned char state[0x88];
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294 memset(state,0,sizeof(state));
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296 // See if the state is the same after 2 steps:
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297 SekState(state); SekStep(); SekStep(); SekState(state+0x44);
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298 if (memcmp(state,state+0x44,0x44)==0) return 1;
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300 unsigned char state[0x44];
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301 static unsigned char oldstate[0x44];
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304 if(memcmp(state,oldstate,0x40)==0) return 1;
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305 memcpy(oldstate, state, 0x40);
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311 // to be called on 224 or line_sample scanlines only
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312 static __inline void getSamples(int y)
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314 static int curr_pos = 0;
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318 curr_pos += sound_render(curr_pos, PsndLen-PsndLen/2);
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319 else curr_pos = sound_render(0, PsndLen);
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320 if (emustatus&1) emustatus|=2; else emustatus&=~2;
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321 if (PicoWriteSound) PicoWriteSound(curr_pos);
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322 // clear sound buffer
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325 else if(emustatus & 3) {
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328 curr_pos = sound_render(0, PsndLen/2);
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334 int vint_delay = 205/*68*/, as_delay = 18/*148*/;
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336 // Accurate but slower frame which does hints
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337 static int PicoFrameHints(void)
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339 struct PicoVideo *pv=&Pico.video;
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340 int total_z80=0,lines,y,lines_vis = 224,z80CycleAim = 0,line_sample;
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341 const int cycles_68k=488,cycles_z80=228; // both PAL and NTSC compile to same values
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342 int skip=PicoSkipFrame || (PicoOpt&0x10);
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343 int hint; // Hint counter
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345 if(Pico.m.pal) { //
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346 //cycles_68k = (int) ((double) OSC_PAL / 7 / 50 / 312 + 0.4); // should compile to a constant (488)
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347 //cycles_z80 = (int) ((double) OSC_PAL / 15 / 50 / 312 + 0.4); // 228
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348 lines = 312; // Steve Snake says there are 313 lines, but this seems to also work well
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350 if(pv->reg[1]&8) lines_vis = 240;
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352 //cycles_68k = (int) ((double) OSC_NTSC / 7 / 60 / 262 + 0.4); // 488
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353 //cycles_z80 = (int) ((double) OSC_NTSC / 15 / 60 / 262 + 0.4); // 228
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359 //z80ExtraCycles = 0;
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363 // z80_resetCycles();
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365 pv->status&=~0x88; // clear V-Int, come out of vblank
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367 hint=pv->reg[10]; // Load H-Int counter
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368 //dprintf("-hint: %i", hint);
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370 //SekRun(as_delay);
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373 for (y=0;y<lines;y++)
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375 Pico.m.scanline=(short)y;
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378 pv->lwrite_cnt -= 12;
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379 if (pv->lwrite_cnt < 0) pv->lwrite_cnt=0;
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380 if (pv->lwrite_cnt == 0)
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381 Pico.video.status|=0x200;
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383 // pad delay (for 6 button pads)
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385 if(Pico.m.padDelay[0]++ > 25) Pico.m.padTHPhase[0]=0;
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386 if(Pico.m.padDelay[1]++ > 25) Pico.m.padTHPhase[1]=0;
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390 if(y <= lines_vis && --hint < 0) // y <= lines_vis: Comix Zone, Golden Axe
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392 //dprintf("rhint:old @ %06x", SekPc);
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393 hint=pv->reg[10]; // Reload H-Int counter
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394 pv->pending_ints|=0x10;
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395 if (pv->reg[0]&0x10) {
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396 elprintf(EL_INTS, "hint: @ %06x [%i]", SekPc, SekCycleCnt);
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399 //dprintf("hint_routine: %x", (*(unsigned short*)(Pico.ram+0x0B84)<<16)|*(unsigned short*)(Pico.ram+0x0B86));
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403 if (y == lines_vis)
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405 pv->status|=0x08; // go into vblank
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406 //pv->status|=0x80; // V-Int happened
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407 //if(!Pico.m.dma_bytes||(Pico.video.reg[0x17]&0x80)) {
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408 // there must be a gap between H and V ints, also after vblank bit set (Mazin Saga, Bram Stoker's Dracula)
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409 SekRun(68); SekCycleAim-=68; // 128; ?
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411 // SekRun(vint_delay); SekCycleAim-=vint_delay; // 128; ?
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412 // SekCycleAim-=as_delay;
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414 pv->pending_ints|=0x20;
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415 if(pv->reg[1]&0x20) {
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416 elprintf(EL_INTS, "vint: @ %06x [%i]", SekPc, SekCycleCnt);
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419 if(Pico.m.z80Run && (PicoOpt&4)) // ?
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421 //dprintf("zint: [%i|%i] zPC=%04x", Pico.m.scanline, SekCyclesDone(), mz80GetRegisterValue(NULL, 0));
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424 // decide if we draw this line
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425 #if CAN_HANDLE_240_LINES
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426 if(!skip && ((!(pv->reg[1]&8) && y<224) || ((pv->reg[1]&8) && y<240)) )
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433 sound_timers_and_dac(y);
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435 // get samples from sound chips
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436 if(y == 32 && PsndOut)
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438 else if((y == 224 || y == line_sample) && PsndOut)
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442 if (Pico.m.dma_xfers) SekCyclesBurn(CheckDMA());
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443 SekRun(cycles_68k);
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444 if ((PicoOpt&4) && Pico.m.z80Run) {
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445 if (Pico.m.z80Run & 2) z80CycleAim+=cycles_z80;
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447 int cnt = SekCyclesDone() - z80startCycle;
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448 cnt = (cnt>>1)-(cnt>>5);
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449 //if (cnt > cycles_z80) printf("FIXME: z80 cycles: %i\n", cnt);
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450 if (cnt > cycles_z80) cnt = cycles_z80;
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451 Pico.m.z80Run |= 2;
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454 total_z80+=z80_run(z80CycleAim-total_z80);
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458 // draw a frame just after vblank in alternative render mode
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459 if(!PicoSkipFrame && (PicoOpt&0x10))
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465 #include "PicoFrameHints.c"
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468 // helper z80 runner
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469 static void PicoRunZ80Simple(int line_from, int line_to)
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471 int line_from_r=line_from, line_to_r=line_to, line = line_from;
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472 int line_sample = Pico.m.pal ? 68 : 93;
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474 if(!(PicoOpt&4) || Pico.m.z80Run == 0) { line_from_r = line_to_r; line_to_r = 0; }
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477 // we have ym2612 enabled, so we have to run Z80 in lines, so we could update DAC and timers
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478 for(; line < line_to; line++) {
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479 sound_timers_and_dac(line);
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480 if((line == 224 || line == line_sample) && PsndOut) getSamples(line);
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481 if(line == 32 && PsndOut) emustatus &= ~1;
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482 if(line >= line_from_r && line < line_to_r)
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485 } else if(line_to_r-line_from_r > 0) {
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486 z80_run(228*(line_to_r-line_from_r));
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487 // samples will be taken by caller
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491 // Simple frame without H-Ints
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492 static int PicoFrameSimple(void)
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494 struct PicoVideo *pv=&Pico.video;
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495 int y=0,line=0,lines=0,lines_step=0,sects;
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496 int cycles_68k_vblock,cycles_68k_block;
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499 // M68k cycles/frame: 152009.78
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500 if(pv->reg[1]&8) { // 240 lines
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501 cycles_68k_block = (int) ((double) OSC_PAL / 7 / 50 / 312 * 15 + 0.4); // 16 sects, 16*15=240, 7308
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502 cycles_68k_vblock = (int) ((double) OSC_PAL / 7 / 50 / 312 * 24 + 0.4); // 3 sects, 3*24=72, 35163?
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505 cycles_68k_block = (int) ((double) OSC_PAL / 7 / 50 / 312 * 14 + 0.4); // 16*14=224
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506 cycles_68k_vblock = (int) ((double) OSC_PAL / 7 / 50 / 312 * 22 + 0.4); // 4 sects, 4*22=88
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510 // M68k cycles/frame: 127840.71
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511 cycles_68k_block = (int) ((double) OSC_NTSC / 7 / 60 / 262 * 14 + 0.4); // 16*14=224, 6831
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512 cycles_68k_vblock = (int) ((double) OSC_NTSC / 7 / 60 / 262 * 19 + 0.4); // 2 sects, 2*19=38, 18544
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516 // we don't emulate DMA timing in this mode
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517 if (Pico.m.dma_xfers) {
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518 Pico.m.dma_xfers=0;
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519 Pico.video.status&=~2;
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523 pv->lwrite_cnt = 0;
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524 Pico.video.status|=0x200;
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526 Pico.m.scanline=-1;
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530 // 6 button pad: let's just say it timed out now
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531 Pico.m.padTHPhase[0]=Pico.m.padTHPhase[1]=0;
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533 // ---- Active Scan ----
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534 pv->status&=~0x88; // clear V-Int, come out of vblank
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536 // Run in sections:
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537 for(sects=16; sects; sects--)
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539 if (CheckIdle()) break;
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541 lines += lines_step;
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542 SekRun(cycles_68k_block);
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544 PicoRunZ80Simple(line, lines);
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548 // run Z80 for remaining sections
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550 int c = sects*cycles_68k_block;
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552 lines += sects*lines_step;
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553 PicoRunZ80Simple(line, lines);
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554 // this is for approriate line counter, etc
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559 // here we render sound if ym2612 is disabled
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560 if(!(PicoOpt&1) && PsndOut) {
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561 int len = sound_render(0, PsndLen);
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562 if(PicoWriteSound) PicoWriteSound(len);
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563 // clear sound buffer
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568 if(!PicoSkipFrame) {
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569 if(!(PicoOpt&0x10))
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571 #if CAN_HANDLE_240_LINES
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573 for (y=0;y<240;y++) PicoLine(y);
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575 for (y=0;y<224;y++) PicoLine(y);
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578 for (y=0;y<224;y++) PicoLine(y);
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580 else PicoFrameFull();
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583 // ---- V-Blanking period ----
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586 if(pv->reg[1]&8) { // 240 lines
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587 lines = line = 240;
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591 lines = line = 224;
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596 lines = line = 224;
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601 //dprintf("vint: @ %06x [%i]", SekPc, SekCycleCnt);
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602 pv->pending_ints|=0x20;
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603 if (pv->reg[1]&0x20) SekInterrupt(6); // Set IRQ
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604 pv->status|=8; // go into vblank
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605 if(Pico.m.z80Run && (PicoOpt&4)) // ?
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609 lines += lines_step;
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611 SekRun(cycles_68k_vblock);
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613 PicoRunZ80Simple(line, lines);
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617 if(sects && CheckIdle()) break;
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620 // run Z80 for remaining sections
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622 lines += sects*lines_step;
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623 PicoRunZ80Simple(line, lines);
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629 int PicoFrame(void)
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633 Pico.m.frame_count++;
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640 // be accurate if we are asked for this
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641 if(PicoOpt&0x40) acc=1;
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642 // don't be accurate in alternative render mode, as hint effects will not be rendered anyway
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643 else if(PicoOpt&0x10) acc = 0;
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644 else acc=Pico.video.reg[0]&0x10; // be accurate if hints are used
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646 //if(Pico.video.reg[12]&0x2) Pico.video.status ^= 0x10; // change odd bit in interlace mode
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648 if(!(PicoOpt&0x10))
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653 else PicoFrameSimple();
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658 void PicoFrameDrawOnly(void)
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662 for (y=0;y<224;y++) PicoLine(y);
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665 // callback to output message from emu
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666 void (*PicoMessage)(const char *msg)=NULL;
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668 #if defined(__DEBUG_PRINT) || defined(__GP2X__)
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669 // tmp debug: dump some stuff
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670 #define bit(r, x) ((r>>x)&1)
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671 void z80_debug(char *dstr);
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672 char *debugString(void)
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675 static char dstr[1024];
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676 struct PicoVideo *pv=&Pico.video;
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677 unsigned char *reg=pv->reg, r;
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681 sprintf(dstrp, "mode set 1: %02x\n", (r=reg[0])); dstrp+=strlen(dstrp);
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682 sprintf(dstrp, "display_disable: %i, M3: %i, palette: %i, ?, hints: %i\n", bit(r,0), bit(r,1), bit(r,2), bit(r,4));
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683 dstrp+=strlen(dstrp);
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684 sprintf(dstrp, "mode set 2: %02x\n", (r=reg[1])); dstrp+=strlen(dstrp);
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685 sprintf(dstrp, "SMS/gen: %i, pal: %i, dma: %i, vints: %i, disp: %i, TMS: %i\n", bit(r,2), bit(r,3), bit(r,4),
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686 bit(r,5), bit(r,6), bit(r,7)); dstrp+=strlen(dstrp);
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687 sprintf(dstrp, "mode set 3: %02x\n", (r=reg[0xB])); dstrp+=strlen(dstrp);
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688 sprintf(dstrp, "LSCR: %i, HSCR: %i, 2cell vscroll: %i, IE2: %i\n", bit(r,0), bit(r,1), bit(r,2), bit(r,3)); dstrp+=strlen(dstrp);
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689 sprintf(dstrp, "mode set 4: %02x\n", (r=reg[0xC])); dstrp+=strlen(dstrp);
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690 sprintf(dstrp, "interlace: %i%i, cells: %i, shadow: %i\n", bit(r,2), bit(r,1), (r&0x80) ? 40 : 32, bit(r,3));
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691 dstrp+=strlen(dstrp);
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692 sprintf(dstrp, "scroll size: w: %i, h: %i SRAM: %i; eeprom: %i\n", reg[0x10]&3, (reg[0x10]&0x30)>>4,
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693 bit(Pico.m.sram_reg, 4), bit(Pico.m.sram_reg, 2)); dstrp+=strlen(dstrp);
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694 sprintf(dstrp, "sram range: %06x-%06x, reg: %02x\n", SRam.start, SRam.end, Pico.m.sram_reg); dstrp+=strlen(dstrp);
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695 sprintf(dstrp, "pend int: v:%i, h:%i, vdp status: %04x\n", bit(pv->pending_ints,5), bit(pv->pending_ints,4), pv->status);
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696 dstrp+=strlen(dstrp);
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698 sprintf(dstrp, "M68k: PC: %06x, st_flg: %x, cycles: %u\n", SekPc, PicoCpu.state_flags, SekCyclesDoneT());
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699 dstrp+=strlen(dstrp);
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700 sprintf(dstrp, "d0=%08x, a0=%08x, osp=%08x, irql=%i\n", PicoCpu.d[0], PicoCpu.a[0], PicoCpu.osp, PicoCpu.irq); dstrp+=strlen(dstrp);
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701 sprintf(dstrp, "d1=%08x, a1=%08x, sr=%04x\n", PicoCpu.d[1], PicoCpu.a[1], CycloneGetSr(&PicoCpu)); dstrp+=strlen(dstrp);
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702 for(r=2; r < 8; r++) {
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703 sprintf(dstrp, "d%i=%08x, a%i=%08x\n", r, PicoCpu.d[r], r, PicoCpu.a[r]); dstrp+=strlen(dstrp);
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706 sprintf(dstrp, "z80Run: %i, pal: %i, frame#: %i\n", Pico.m.z80Run, Pico.m.pal, Pico.m.frame_count); dstrp+=strlen(dstrp);
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707 z80_debug(dstrp); dstrp+=strlen(dstrp);
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708 if (strlen(dstr) > sizeof(dstr))
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709 printf("warning: debug buffer overflow (%i/%i)\n", strlen(dstr), sizeof(dstr));
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712 struct PicoVideo *pvid=&Pico.video;
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715 static char dstr[1024*8];
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718 table=pvid->reg[5]&0x7f;
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719 if (pvid->reg[12]&1) table&=0x7e; // Lowest bit 0 in 40-cell mode
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720 table<<=8; // Get sprite table address/2
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722 for (i=u=n=0; u < 80 && n < 20; u++)
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724 unsigned int *sprite;
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725 int code, code2, sx, sy, height;
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727 sprite=(unsigned int *)(Pico.vram+((table+(link<<2))&0x7ffc)); // Find sprite
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732 // check if it is on this line
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733 sy = (code&0x1ff);//-0x80;
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734 height = ((code>>24)&3)+1;
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738 sx = (code2>>16)&0x1ff;
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740 printf("#%02i x: %03i y: %03i %ix%i\n", u, sx, sy, ((code>>26)&3)+1, height);
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742 link=(code>>16)&0x7f;
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743 if(!link) break; // End of sprites
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749 FILE *f = fopen("zram", "wb");
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750 fwrite(Pico.zram, 1, 0x2000, f);
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