1 // Memory I/O handlers for Sega/Mega CD.
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2 // Loosely based on Gens code.
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3 // (c) Copyright 2007, Grazvydas "notaz" Ignotas
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5 // A68K no longer supported here
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9 #include "../PicoInt.h"
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11 #include "../sound/sound.h"
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12 #include "../sound/ym2612.h"
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13 #include "../sound/sn76496.h"
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18 typedef unsigned char u8;
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19 typedef unsigned short u16;
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20 typedef unsigned int u32;
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22 //#define __debug_io
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23 //#define __debug_io2
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25 #define rdprintf dprintf
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26 //#define rdprintf(...)
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27 //#define wrdprintf dprintf
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28 #define wrdprintf(...)
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29 #define plprintf dprintf
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30 //#define plprintf(...)
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32 // -----------------------------------------------------------------
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35 //#undef USE_POLL_DETECT
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36 #define POLL_LIMIT 16
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37 #define POLL_CYCLES 124
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38 // int m68k_poll_addr, m68k_poll_cnt;
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39 unsigned int s68k_poll_adclk, s68k_poll_cnt;
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41 #ifndef _ASM_CD_MEMORY_C
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42 static u32 m68k_reg_read16(u32 a)
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46 // dprintf("m68k_regs r%2i: [%02x] @%06x", realsize&~1, a+(realsize&1), SekPc);
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50 d = ((Pico_mcd->s68k_regs[0x33]<<13)&0x8000) | Pico_mcd->m.busreq; // here IFL2 is always 0, just like in Gens
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53 d = (Pico_mcd->s68k_regs[a]<<8) | (Pico_mcd->s68k_regs[a+1]&0xc7);
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54 // the DMNA delay must only be visible on s68k side (Lunar2, Silpheed)
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55 if (Pico_mcd->m.state_flags&2) { d &= ~1; d |= 2; }
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56 //printf("m68k_regs r3: %02x @%06x\n", (u8)d, SekPc);
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59 d = Pico_mcd->s68k_regs[4]<<8;
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62 d = *(u16 *)(Pico_mcd->bios + 0x72);
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65 d = Read_CDC_Host(0);
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68 dprintf("m68k FIXME: reserved read");
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71 d = Pico_mcd->m.timer_stopwatch >> 16;
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72 dprintf("m68k stopwatch timer read (%04x)", d);
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77 // comm flag/cmd/status (0xE-0x2F)
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78 d = (Pico_mcd->s68k_regs[a]<<8) | Pico_mcd->s68k_regs[a+1];
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82 dprintf("m68k_regs FIXME invalid read @ %02x", a);
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86 // dprintf("ret = %04x", d);
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91 #ifndef _ASM_CD_MEMORY_C
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94 void m68k_reg_write8(u32 a, u32 d)
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97 // dprintf("m68k_regs w%2i: [%02x] %02x @%06x", realsize, a, d, SekPc);
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102 if ((d&1) && (Pico_mcd->s68k_regs[0x33]&(1<<2))) { dprintf("m68k: s68k irq 2"); SekInterruptS68k(2); }
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106 if (!(d&1)) Pico_mcd->m.state_flags |= 1; // reset pending, needed to be sure we fetch the right vectors on reset
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107 if ( (Pico_mcd->m.busreq&1) != (d&1)) dprintf("m68k: s68k reset %i", !(d&1));
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108 if ( (Pico_mcd->m.busreq&2) != (d&2)) dprintf("m68k: s68k brq %i", (d&2)>>1);
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109 if ((Pico_mcd->m.state_flags&1) && (d&3)==1) {
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110 SekResetS68k(); // S68k comes out of RESET or BRQ state
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111 Pico_mcd->m.state_flags&=~1;
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112 dprintf("m68k: resetting s68k, cycles=%i", SekCyclesLeft);
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114 Pico_mcd->m.busreq = d;
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117 dprintf("m68k: prg wp=%02x", d);
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118 Pico_mcd->s68k_regs[2] = d; // really use s68k side register
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121 u32 dold = Pico_mcd->s68k_regs[3]&0x1f;
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122 //printf("m68k_regs w3: %02x @%06x\n", (u8)d, SekPc);
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124 if ((dold>>6) != ((d>>6)&3))
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125 dprintf("m68k: prg bank: %i -> %i", (Pico_mcd->s68k_regs[a]>>6), ((d>>6)&3));
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126 //if ((Pico_mcd->s68k_regs[3]&4) != (d&4)) dprintf("m68k: ram mode %i mbit", (d&4) ? 1 : 2);
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127 //if ((Pico_mcd->s68k_regs[3]&2) != (d&2)) dprintf("m68k: %s", (d&4) ? ((d&2) ? "word swap req" : "noop?") :
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128 // ((d&2) ? "word ram to s68k" : "word ram to m68k"));
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130 d ^= 2; // writing 0 to DMNA actually sets it, 1 does nothing
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132 //dold &= ~2; // ??
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134 if ((d & 2) && !(dold & 2)) {
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135 Pico_mcd->m.state_flags |= 2; // we must delay setting DMNA bit (needed for Silpheed)
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139 if (d & 2) dold &= ~1; // return word RAM to s68k in 2M mode
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142 Pico_mcd->s68k_regs[3] = d | dold; // really use s68k side register
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143 #ifdef USE_POLL_DETECT
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144 if ((s68k_poll_adclk&0xfe) == 2 && s68k_poll_cnt > POLL_LIMIT) {
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145 SekSetStopS68k(0); s68k_poll_adclk = 0;
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146 plprintf("s68k poll release, a=%02x\n", a);
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152 Pico_mcd->bios[0x72 + 1] = d; // simple hint vector changer
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155 Pico_mcd->bios[0x72] = d;
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156 dprintf("hint vector set to %08x", PicoRead32(0x70));
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159 d = (d << 1) | ((d >> 7) & 1); // rol8 1 (special case)
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161 //dprintf("m68k: comm flag: %02x", d);
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162 Pico_mcd->s68k_regs[0xe] = d;
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163 #ifdef USE_POLL_DETECT
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164 if ((s68k_poll_adclk&0xfe) == 0xe && s68k_poll_cnt > POLL_LIMIT) {
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165 SekSetStopS68k(0); s68k_poll_adclk = 0;
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166 plprintf("s68k poll release, a=%02x\n", a);
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172 if ((a&0xf0) == 0x10) {
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173 Pico_mcd->s68k_regs[a] = d;
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174 #ifdef USE_POLL_DETECT
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175 if ((a&0xfe) == (s68k_poll_adclk&0xfe) && s68k_poll_cnt > POLL_LIMIT) {
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176 SekSetStopS68k(0); s68k_poll_adclk = 0;
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177 plprintf("s68k poll release, a=%02x\n", a);
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183 dprintf("m68k FIXME: invalid write? [%02x] %02x", a, d);
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186 #ifndef _ASM_CD_MEMORY_C
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189 u32 s68k_poll_detect(u32 a, u32 d)
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191 #ifdef USE_POLL_DETECT
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192 // polling detection
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193 if (a == (s68k_poll_adclk&0xff)) {
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194 unsigned int clkdiff = SekCyclesDoneS68k() - (s68k_poll_adclk>>8);
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195 if (clkdiff <= POLL_CYCLES) {
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197 //printf("-- diff: %u, cnt = %i\n", clkdiff, s68k_poll_cnt);
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198 if (s68k_poll_cnt > POLL_LIMIT) {
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200 plprintf("s68k poll detected @ %06x, a=%02x\n", SekPcS68k, a);
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202 s68k_poll_adclk = (SekCyclesDoneS68k() << 8) | a;
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206 s68k_poll_adclk = (SekCyclesDoneS68k() << 8) | a;
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212 #define READ_FONT_DATA(basemask) \
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214 unsigned int fnt = *(unsigned int *)(Pico_mcd->s68k_regs + 0x4c); \
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215 unsigned int col0 = (fnt >> 8) & 0x0f, col1 = (fnt >> 12) & 0x0f; \
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216 if (fnt & (basemask << 0)) d = col1 ; else d = col0; \
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217 if (fnt & (basemask << 1)) d |= col1 << 4; else d |= col0 << 4; \
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218 if (fnt & (basemask << 2)) d |= col1 << 8; else d |= col0 << 8; \
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219 if (fnt & (basemask << 3)) d |= col1 << 12; else d |= col0 << 12; \
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223 #ifndef _ASM_CD_MEMORY_C
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226 u32 s68k_reg_read16(u32 a)
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230 // dprintf("s68k_regs r%2i: [%02x] @ %06x", realsize&~1, a+(realsize&1), SekPcS68k);
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234 return ((Pico_mcd->s68k_regs[0]&3)<<8) | 1; // ver = 0, not in reset state
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236 d = (Pico_mcd->s68k_regs[2]<<8) | (Pico_mcd->s68k_regs[3]&0x1f);
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237 //printf("s68k_regs r3: %02x @%06x\n", (u8)d, SekPcS68k);
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238 return s68k_poll_detect(a, d);
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240 return CDC_Read_Reg();
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242 return Read_CDC_Host(1); // Gens returns 0 here on byte reads
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244 d = Pico_mcd->m.timer_stopwatch >> 16;
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245 dprintf("s68k stopwatch timer read (%04x)", d);
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248 dprintf("s68k int3 timer read (%02x)", Pico_mcd->s68k_regs[31]);
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249 return Pico_mcd->s68k_regs[31];
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250 case 0x34: // fader
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251 return 0; // no busy bit
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252 case 0x50: // font data (check: Lunar 2, Silpheed)
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253 READ_FONT_DATA(0x00100000);
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256 READ_FONT_DATA(0x00010000);
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259 READ_FONT_DATA(0x10000000);
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262 READ_FONT_DATA(0x01000000);
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266 d = (Pico_mcd->s68k_regs[a]<<8) | Pico_mcd->s68k_regs[a+1];
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268 if (a >= 0x0e && a < 0x30)
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269 return s68k_poll_detect(a, d);
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274 #ifndef _ASM_CD_MEMORY_C
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277 void s68k_reg_write8(u32 a, u32 d)
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279 //dprintf("s68k_regs w%2i: [%02x] %02x @ %06x", realsize, a, d, SekPcS68k);
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281 // TODO: review against Gens
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282 // Warning: d might have upper bits set
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285 return; // only m68k can change WP
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287 int dold = Pico_mcd->s68k_regs[3];
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288 //printf("s68k_regs w3: %02x @%06x\n", (u8)d, SekPcS68k);
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292 if ((d ^ dold) & 5) {
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293 d &= ~2; // in case of mode or bank change we clear DMNA (m68k req) bit
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294 #ifdef _ASM_CD_MEMORY_C
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298 #ifdef _ASM_CD_MEMORY_C
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299 if ((d ^ dold) & 0x1d)
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300 PicoMemResetCDdecode(d);
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303 dprintf("wram mode 2M->1M");
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304 wram_2M_to_1M(Pico_mcd->word_ram2M);
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308 dprintf("wram mode 1M->2M");
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309 if (!(d&1)) { // it didn't set the ret bit, which means it doesn't want to give WRAM to m68k
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311 d |= (dold&1) ? 2 : 1; // then give it to the one which had bank0 in 1M mode
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313 wram_1M_to_2M(Pico_mcd->word_ram2M);
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314 #ifdef _ASM_CD_MEMORY_C
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320 if (d&1) d &= ~2; // return word RAM to m68k in 2M mode
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325 dprintf("s68k CDC dest: %x", d&7);
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326 Pico_mcd->s68k_regs[4] = (Pico_mcd->s68k_regs[4]&0xC0) | (d&7); // CDC mode
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329 //dprintf("s68k CDC reg addr: %x", d&0xf);
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335 dprintf("s68k set CDC dma addr");
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339 dprintf("s68k set stopwatch timer");
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340 Pico_mcd->m.timer_stopwatch = 0;
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343 Pico_mcd->s68k_regs[0xf] = (d>>1) | (d<<7); // ror8 1, Gens note: Dragons lair
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346 dprintf("s68k set int3 timer: %02x", d);
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347 Pico_mcd->m.timer_int3 = (d & 0xff) << 16;
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349 case 0x33: // IRQ mask
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350 dprintf("s68k irq mask: %02x", d);
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351 if ((d&(1<<4)) && (Pico_mcd->s68k_regs[0x37]&4) && !(Pico_mcd->s68k_regs[0x33]&(1<<4))) {
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352 CDD_Export_Status();
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355 case 0x34: // fader
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356 Pico_mcd->s68k_regs[a] = (u8) d & 0x7f;
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359 return; // d/m bit is unsetable
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361 u32 d_old = Pico_mcd->s68k_regs[0x37];
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362 Pico_mcd->s68k_regs[0x37] = d&7;
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363 if ((d&4) && !(d_old&4)) {
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364 CDD_Export_Status();
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369 Pico_mcd->s68k_regs[a] = (u8) d;
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370 CDD_Import_Command();
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374 if ((a&0x1f0) == 0x10 || (a >= 0x38 && a < 0x42))
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376 dprintf("s68k FIXME: invalid write @ %02x?", a);
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380 Pico_mcd->s68k_regs[a] = (u8) d;
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384 #ifndef _ASM_CD_MEMORY_C
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385 static u32 OtherRead16End(u32 a, int realsize)
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389 if ((a&0xffffc0)==0xa12000) {
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390 d=m68k_reg_read16(a);
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394 dprintf("m68k FIXME: unusual r%i: %06x @%06x", realsize&~1, (a&0xfffffe)+(realsize&1), SekPc);
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401 static void OtherWrite8End(u32 a, u32 d, int realsize)
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403 if ((a&0xffffc0)==0xa12000) { m68k_reg_write8(a, d); return; }
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405 dprintf("m68k FIXME: strange w%i: [%06x], %08x @%06x", realsize, a&0xffffff, d, SekPc);
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409 #undef _ASM_MEMORY_C
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410 #include "../MemoryCmn.c"
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411 #include "cell_map.c"
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412 #endif // !def _ASM_CD_MEMORY_C
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415 // -----------------------------------------------------------------
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416 // Read Rom and read Ram
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418 //u8 PicoReadM68k8_(u32 a);
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419 #ifdef _ASM_CD_MEMORY_C
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420 u32 PicoReadM68k8(u32 a);
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422 static u32 PicoReadM68k8(u32 a)
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426 if ((a&0xe00000)==0xe00000) { d = *(u8 *)(Pico.ram+((a^1)&0xffff)); goto end; } // Ram
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430 if (a < 0x20000) { d = *(u8 *)(Pico_mcd->bios+(a^1)); goto end; } // bios
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433 if ((a&0xfe0000)==0x020000 && (Pico_mcd->m.busreq&3)!=1) {
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434 u8 *prg_bank = Pico_mcd->prg_ram_b[Pico_mcd->s68k_regs[3]>>6];
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435 d = *(prg_bank+((a^1)&0x1ffff));
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440 if ((a&0xfc0000)==0x200000) {
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441 wrdprintf("m68k_wram r8: [%06x] @%06x", a, SekPc);
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442 if (Pico_mcd->s68k_regs[3]&4) { // 1M mode?
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443 int bank = Pico_mcd->s68k_regs[3]&1;
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445 a = (a&3) | (cell_map(a >> 2) << 2); // cell arranged
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447 d = Pico_mcd->word_ram1M[bank][a^1];
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449 // allow access in any mode, like Gens does
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450 d = Pico_mcd->word_ram2M[(a^1)&0x3ffff];
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452 wrdprintf("ret = %02x", (u8)d);
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456 if ((a&0xff4000)==0xa00000) { d=z80Read8(a); goto end; } // Z80 Ram
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458 if ((a&0xffffc0)==0xa12000)
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459 rdprintf("m68k_regs r8: [%02x] @%06x", a&0x3f, SekPc);
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461 d=OtherRead16(a&~1, 8|(a&1)); if ((a&1)==0) d>>=8;
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463 if ((a&0xffffc0)==0xa12000)
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464 rdprintf("ret = %02x", (u8)d);
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469 dprintf("r8 : %06x, %02x @%06x", a&0xffffff, (u8)d, SekPc);
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476 #ifdef _ASM_CD_MEMORY_C
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477 u32 PicoReadM68k16(u32 a);
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479 static u32 PicoReadM68k16(u32 a)
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483 if ((a&0xe00000)==0xe00000) { d=*(u16 *)(Pico.ram+(a&0xfffe)); goto end; } // Ram
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487 if (a < 0x20000) { d = *(u16 *)(Pico_mcd->bios+a); goto end; } // bios
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490 if ((a&0xfe0000)==0x020000 && (Pico_mcd->m.busreq&3)!=1) {
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491 u8 *prg_bank = Pico_mcd->prg_ram_b[Pico_mcd->s68k_regs[3]>>6];
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492 wrdprintf("m68k_prgram r16: [%i,%06x] @%06x", Pico_mcd->s68k_regs[3]>>6, a, SekPc);
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493 d = *(u16 *)(prg_bank+(a&0x1fffe));
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494 wrdprintf("ret = %04x", d);
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499 if ((a&0xfc0000)==0x200000) {
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500 wrdprintf("m68k_wram r16: [%06x] @%06x", a, SekPc);
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501 if (Pico_mcd->s68k_regs[3]&4) { // 1M mode?
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502 int bank = Pico_mcd->s68k_regs[3]&1;
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504 a = (a&2) | (cell_map(a >> 2) << 2); // cell arranged
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506 d = *(u16 *)(Pico_mcd->word_ram1M[bank]+a);
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508 // allow access in any mode, like Gens does
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509 d = *(u16 *)(Pico_mcd->word_ram2M+(a&0x3fffe));
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511 wrdprintf("ret = %04x", d);
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515 if ((a&0xffffc0)==0xa12000)
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516 rdprintf("m68k_regs r16: [%02x] @%06x", a&0x3f, SekPc);
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518 d = OtherRead16(a, 16);
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520 if ((a&0xffffc0)==0xa12000)
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521 rdprintf("ret = %04x", d);
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526 dprintf("r16: %06x, %04x @%06x", a&0xffffff, d, SekPc);
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533 #ifdef _ASM_CD_MEMORY_C
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534 u32 PicoReadM68k32(u32 a);
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536 static u32 PicoReadM68k32(u32 a)
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540 if ((a&0xe00000)==0xe00000) { u16 *pm=(u16 *)(Pico.ram+(a&0xfffe)); d = (pm[0]<<16)|pm[1]; goto end; } // Ram
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544 if (a < 0x20000) { u16 *pm=(u16 *)(Pico_mcd->bios+a); d = (pm[0]<<16)|pm[1]; goto end; } // bios
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547 if ((a&0xfe0000)==0x020000 && (Pico_mcd->m.busreq&3)!=1) {
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548 u8 *prg_bank = Pico_mcd->prg_ram_b[Pico_mcd->s68k_regs[3]>>6];
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549 u16 *pm=(u16 *)(prg_bank+(a&0x1fffe));
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550 d = (pm[0]<<16)|pm[1];
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555 if ((a&0xfc0000)==0x200000) {
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556 wrdprintf("m68k_wram r32: [%06x] @%06x", a, SekPc);
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557 if (Pico_mcd->s68k_regs[3]&4) { // 1M mode?
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558 int bank = Pico_mcd->s68k_regs[3]&1;
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559 if (a >= 0x220000) { // cell arranged
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561 a1 = (a&2) | (cell_map(a >> 2) << 2);
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562 if (a&2) a2 = cell_map((a+2) >> 2) << 2;
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564 d = *(u16 *)(Pico_mcd->word_ram1M[bank]+a1) << 16;
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565 d |= *(u16 *)(Pico_mcd->word_ram1M[bank]+a2);
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567 u16 *pm=(u16 *)(Pico_mcd->word_ram1M[bank]+(a&0x1fffe)); d = (pm[0]<<16)|pm[1];
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570 // allow access in any mode, like Gens does
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571 u16 *pm=(u16 *)(Pico_mcd->word_ram2M+(a&0x3fffe)); d = (pm[0]<<16)|pm[1];
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573 wrdprintf("ret = %08x", d);
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577 if ((a&0xffffc0)==0xa12000)
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578 rdprintf("m68k_regs r32: [%02x] @%06x", a&0x3f, SekPc);
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580 d = (OtherRead16(a, 32)<<16)|OtherRead16(a+2, 32);
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582 if ((a&0xffffc0)==0xa12000)
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583 rdprintf("ret = %08x", d);
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587 dprintf("r32: %06x, %08x @%06x", a&0xffffff, d, SekPc);
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594 // -----------------------------------------------------------------
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596 #ifdef _ASM_CD_MEMORY_C
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597 void PicoWriteM68k8(u32 a,u8 d);
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599 static void PicoWriteM68k8(u32 a,u8 d)
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602 dprintf("w8 : %06x, %02x @%06x", a&0xffffff, d, SekPc);
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604 //if ((a&0xe0ffff)==0xe0a9ba+0x69c)
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605 // dprintf("w8 : %06x, %02x @%06x", a&0xffffff, d, SekPc);
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608 if ((a&0xe00000)==0xe00000) { // Ram
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609 *(u8 *)(Pico.ram+((a^1)&0xffff)) = d;
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616 if ((a&0xfe0000)==0x020000 && (Pico_mcd->m.busreq&3)!=1) {
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617 u8 *prg_bank = Pico_mcd->prg_ram_b[Pico_mcd->s68k_regs[3]>>6];
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618 *(u8 *)(prg_bank+((a^1)&0x1ffff))=d;
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623 if ((a&0xfc0000)==0x200000) {
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624 wrdprintf("m68k_wram w8: [%06x] %02x @%06x", a, d, SekPc);
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625 if (Pico_mcd->s68k_regs[3]&4) { // 1M mode?
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626 int bank = Pico_mcd->s68k_regs[3]&1;
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628 a = (a&3) | (cell_map(a >> 2) << 2); // cell arranged
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630 *(u8 *)(Pico_mcd->word_ram1M[bank]+(a^1))=d;
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632 // allow access in any mode, like Gens does
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633 *(u8 *)(Pico_mcd->word_ram2M+((a^1)&0x3ffff))=d;
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638 if ((a&0xffffc0)==0xa12000) {
\r
639 rdprintf("m68k_regs w8: [%02x] %02x @%06x", a&0x3f, d, SekPc);
\r
640 m68k_reg_write8(a, d);
\r
644 OtherWrite8(a,d,8);
\r
649 #ifdef _ASM_CD_MEMORY_C
\r
650 void PicoWriteM68k16(u32 a,u16 d);
\r
652 static void PicoWriteM68k16(u32 a,u16 d)
\r
655 dprintf("w16: %06x, %04x", a&0xffffff, d);
\r
657 // dprintf("w16: %06x, %04x @%06x", a&0xffffff, d, SekPc);
\r
659 if ((a&0xe00000)==0xe00000) { // Ram
\r
660 *(u16 *)(Pico.ram+(a&0xfffe))=d;
\r
667 if ((a&0xfe0000)==0x020000 && (Pico_mcd->m.busreq&3)!=1) {
\r
668 u8 *prg_bank = Pico_mcd->prg_ram_b[Pico_mcd->s68k_regs[3]>>6];
\r
669 wrdprintf("m68k_prgram w16: [%i,%06x] %04x @%06x", Pico_mcd->s68k_regs[3]>>6, a, d, SekPc);
\r
670 *(u16 *)(prg_bank+(a&0x1fffe))=d;
\r
675 if ((a&0xfc0000)==0x200000) {
\r
676 wrdprintf("m68k_wram w16: [%06x] %04x @%06x", a, d, SekPc);
\r
677 if (Pico_mcd->s68k_regs[3]&4) { // 1M mode?
\r
678 int bank = Pico_mcd->s68k_regs[3]&1;
\r
680 a = (a&2) | (cell_map(a >> 2) << 2); // cell arranged
\r
682 *(u16 *)(Pico_mcd->word_ram1M[bank]+a)=d;
\r
684 // allow access in any mode, like Gens does
\r
685 *(u16 *)(Pico_mcd->word_ram2M+(a&0x3fffe))=d;
\r
691 if ((a&0xffffc0)==0xa12000) {
\r
692 rdprintf("m68k_regs w16: [%02x] %04x @%06x", a&0x3f, d, SekPc);
\r
693 if (a == 0xe) { // special case, 2 byte writes would be handled differently
\r
694 Pico_mcd->s68k_regs[0xe] = d >> 8;
\r
695 #ifdef USE_POLL_DETECT
\r
696 if ((s68k_poll_adclk&0xfe) == 0xe && s68k_poll_cnt > POLL_LIMIT) {
\r
697 SekSetStopS68k(0); s68k_poll_adclk = 0;
\r
698 plprintf("s68k poll release, a=%02x\n", a);
\r
703 m68k_reg_write8(a, d>>8);
\r
704 m68k_reg_write8(a+1,d&0xff);
\r
713 #ifdef _ASM_CD_MEMORY_C
\r
714 void PicoWriteM68k32(u32 a,u32 d);
\r
716 static void PicoWriteM68k32(u32 a,u32 d)
\r
719 dprintf("w32: %06x, %08x", a&0xffffff, d);
\r
722 if ((a&0xe00000)==0xe00000)
\r
725 u16 *pm=(u16 *)(Pico.ram+(a&0xfffe));
\r
726 pm[0]=(u16)(d>>16); pm[1]=(u16)d;
\r
733 if ((a&0xfe0000)==0x020000 && (Pico_mcd->m.busreq&3)!=1) {
\r
734 u8 *prg_bank = Pico_mcd->prg_ram_b[Pico_mcd->s68k_regs[3]>>6];
\r
735 u16 *pm=(u16 *)(prg_bank+(a&0x1fffe));
\r
736 pm[0]=(u16)(d>>16); pm[1]=(u16)d;
\r
741 if ((a&0xfc0000)==0x200000) {
\r
742 if (d != 0) // don't log clears
\r
743 wrdprintf("m68k_wram w32: [%06x] %08x @%06x", a, d, SekPc);
\r
744 if (Pico_mcd->s68k_regs[3]&4) { // 1M mode?
\r
745 int bank = Pico_mcd->s68k_regs[3]&1;
\r
746 if (a >= 0x220000) { // cell arranged
\r
748 a1 = (a&2) | (cell_map(a >> 2) << 2);
\r
749 if (a&2) a2 = cell_map((a+2) >> 2) << 2;
\r
751 *(u16 *)(Pico_mcd->word_ram1M[bank]+a1) = d >> 16;
\r
752 *(u16 *)(Pico_mcd->word_ram1M[bank]+a2) = d;
\r
754 u16 *pm=(u16 *)(Pico_mcd->word_ram1M[bank]+(a&0x1fffe));
\r
755 pm[0]=(u16)(d>>16); pm[1]=(u16)d;
\r
758 // allow access in any mode, like Gens does
\r
759 u16 *pm=(u16 *)(Pico_mcd->word_ram2M+(a&0x3fffe));
\r
760 pm[0]=(u16)(d>>16); pm[1]=(u16)d;
\r
765 if ((a&0xffffc0)==0xa12000) {
\r
766 rdprintf("m68k_regs w32: [%02x] %08x @%06x", a&0x3f, d, SekPc);
\r
767 if ((a&0x3e) == 0xe) dprintf("m68k FIXME: w32 [%02x]", a&0x3f);
\r
770 OtherWrite16(a, (u16)(d>>16));
\r
771 OtherWrite16(a+2,(u16)d);
\r
776 // -----------------------------------------------------------------
\r
778 // -----------------------------------------------------------------
\r
780 #ifdef _ASM_CD_MEMORY_C
\r
781 u32 PicoReadS68k8(u32 a);
\r
783 static u32 PicoReadS68k8(u32 a)
\r
791 d = *(Pico_mcd->prg_ram+(a^1));
\r
796 if ((a&0xfffe00) == 0xff8000) {
\r
798 rdprintf("s68k_regs r8: [%02x] @ %06x", a, SekPcS68k);
\r
799 if (a >= 0x0e && a < 0x30) {
\r
800 d = Pico_mcd->s68k_regs[a];
\r
801 s68k_poll_detect(a, d);
\r
802 rdprintf("ret = %02x", (u8)d);
\r
805 else if (a >= 0x58 && a < 0x68)
\r
806 d = gfx_cd_read(a&~1);
\r
807 else d = s68k_reg_read16(a&~1);
\r
808 if ((a&1)==0) d>>=8;
\r
809 rdprintf("ret = %02x", (u8)d);
\r
813 // word RAM (2M area)
\r
814 if ((a&0xfc0000)==0x080000) { // 080000-0bffff
\r
815 // test: batman returns
\r
816 wrdprintf("s68k_wram2M r8: [%06x] @%06x", a, SekPcS68k);
\r
817 if (Pico_mcd->s68k_regs[3]&4) { // 1M decode mode?
\r
818 int bank = !(Pico_mcd->s68k_regs[3]&1);
\r
819 d = Pico_mcd->word_ram1M[bank][((a>>1)^1)&0x1ffff];
\r
820 if (a&1) d &= 0x0f;
\r
822 dprintf("FIXME: decode");
\r
824 // allow access in any mode, like Gens does
\r
825 d = Pico_mcd->word_ram2M[(a^1)&0x3ffff];
\r
827 wrdprintf("ret = %02x", (u8)d);
\r
831 // word RAM (1M area)
\r
832 if ((a&0xfe0000)==0x0c0000 && (Pico_mcd->s68k_regs[3]&4)) { // 0c0000-0dffff
\r
834 wrdprintf("s68k_wram1M r8: [%06x] @%06x", a, SekPcS68k);
\r
835 // if (!(Pico_mcd->s68k_regs[3]&4))
\r
836 // dprintf("s68k_wram1M FIXME: wrong mode");
\r
837 bank = !(Pico_mcd->s68k_regs[3]&1);
\r
838 d = Pico_mcd->word_ram1M[bank][(a^1)&0x1ffff];
\r
839 wrdprintf("ret = %02x", (u8)d);
\r
844 if ((a&0xff8000)==0xff0000) {
\r
845 dprintf("s68k_pcm r8: [%06x] @%06x", a, SekPcS68k);
\r
848 d = Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][(a>>1)&0xfff];
\r
849 else if (a >= 0x20) {
\r
851 d = Pico_mcd->pcm.ch[a>>2].addr >> PCM_STEP_SHIFT;
\r
852 if (a & 2) d >>= 8;
\r
854 dprintf("ret = %02x", (u8)d);
\r
859 if ((a&0xff0000)==0xfe0000) {
\r
860 d = Pico_mcd->bram[(a>>1)&0x1fff];
\r
864 dprintf("s68k r8 : %06x, %02x @%06x", a&0xffffff, (u8)d, SekPcS68k);
\r
869 dprintf("s68k r8 : %06x, %02x @%06x", a&0xffffff, (u8)d, SekPcS68k);
\r
876 #ifdef _ASM_CD_MEMORY_C
\r
877 u32 PicoReadS68k16(u32 a);
\r
879 static u32 PicoReadS68k16(u32 a)
\r
887 wrdprintf("s68k_prgram r16: [%06x] @%06x", a, SekPcS68k);
\r
888 d = *(u16 *)(Pico_mcd->prg_ram+a);
\r
889 wrdprintf("ret = %04x", d);
\r
894 if ((a&0xfffe00) == 0xff8000) {
\r
896 rdprintf("s68k_regs r16: [%02x] @ %06x", a, SekPcS68k);
\r
897 if (a >= 0x58 && a < 0x68)
\r
898 d = gfx_cd_read(a);
\r
899 else d = s68k_reg_read16(a);
\r
900 rdprintf("ret = %04x", d);
\r
904 // word RAM (2M area)
\r
905 if ((a&0xfc0000)==0x080000) { // 080000-0bffff
\r
906 wrdprintf("s68k_wram2M r16: [%06x] @%06x", a, SekPcS68k);
\r
907 if (Pico_mcd->s68k_regs[3]&4) { // 1M decode mode?
\r
908 int bank = !(Pico_mcd->s68k_regs[3]&1);
\r
909 d = Pico_mcd->word_ram1M[bank][((a>>1)^1)&0x1ffff];
\r
910 d |= d << 4; d &= ~0xf0;
\r
911 dprintf("FIXME: decode");
\r
913 // allow access in any mode, like Gens does
\r
914 d = *(u16 *)(Pico_mcd->word_ram2M+(a&0x3fffe));
\r
916 wrdprintf("ret = %04x", d);
\r
920 // word RAM (1M area)
\r
921 if ((a&0xfe0000)==0x0c0000 && (Pico_mcd->s68k_regs[3]&4)) { // 0c0000-0dffff
\r
923 wrdprintf("s68k_wram1M r16: [%06x] @%06x", a, SekPcS68k);
\r
924 // if (!(Pico_mcd->s68k_regs[3]&4))
\r
925 // dprintf("s68k_wram1M FIXME: wrong mode");
\r
926 bank = !(Pico_mcd->s68k_regs[3]&1);
\r
927 d = *(u16 *)(Pico_mcd->word_ram1M[bank]+(a&0x1fffe));
\r
928 wrdprintf("ret = %04x", d);
\r
933 if ((a&0xff0000)==0xfe0000) {
\r
934 dprintf("FIXME: s68k_bram r16: [%06x] @%06x", a, SekPcS68k);
\r
936 d = Pico_mcd->bram[a++]; // Gens does little endian here, and so do we..
\r
937 d|= Pico_mcd->bram[a++] << 8; // This is most likely wrong
\r
938 dprintf("ret = %04x", d);
\r
943 if ((a&0xff8000)==0xff0000) {
\r
944 dprintf("FIXME: s68k_pcm r16: [%06x] @%06x", a, SekPcS68k);
\r
947 d = Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][(a>>1)&0xfff];
\r
948 else if (a >= 0x20) {
\r
950 d = Pico_mcd->pcm.ch[a>>2].addr >> PCM_STEP_SHIFT;
\r
951 if (a & 2) d >>= 8;
\r
953 dprintf("ret = %04x", d);
\r
957 dprintf("s68k r16: %06x, %04x @%06x", a&0xffffff, d, SekPcS68k);
\r
962 dprintf("s68k r16: %06x, %04x @%06x", a&0xffffff, d, SekPcS68k);
\r
969 #ifdef _ASM_CD_MEMORY_C
\r
970 u32 PicoReadS68k32(u32 a);
\r
972 static u32 PicoReadS68k32(u32 a)
\r
980 u16 *pm=(u16 *)(Pico_mcd->prg_ram+a);
\r
981 d = (pm[0]<<16)|pm[1];
\r
986 if ((a&0xfffe00) == 0xff8000) {
\r
988 rdprintf("s68k_regs r32: [%02x] @ %06x", a, SekPcS68k);
\r
989 if (a >= 0x58 && a < 0x68)
\r
990 d = (gfx_cd_read(a)<<16)|gfx_cd_read(a+2);
\r
991 else d = (s68k_reg_read16(a)<<16)|s68k_reg_read16(a+2);
\r
992 rdprintf("ret = %08x", d);
\r
996 // word RAM (2M area)
\r
997 if ((a&0xfc0000)==0x080000) { // 080000-0bffff
\r
998 wrdprintf("s68k_wram2M r32: [%06x] @%06x", a, SekPcS68k);
\r
999 if (Pico_mcd->s68k_regs[3]&4) { // 1M decode mode?
\r
1000 int bank = !(Pico_mcd->s68k_regs[3]&1);
\r
1002 d = Pico_mcd->word_ram1M[bank][((a+0)^1)&0x1ffff] << 16;
\r
1003 d |= Pico_mcd->word_ram1M[bank][((a+1)^1)&0x1ffff];
\r
1004 d |= d << 4; d &= 0x0f0f0f0f;
\r
1006 // allow access in any mode, like Gens does
\r
1007 u16 *pm=(u16 *)(Pico_mcd->word_ram2M+(a&0x3fffe)); d = (pm[0]<<16)|pm[1];
\r
1009 wrdprintf("ret = %08x", d);
\r
1013 // word RAM (1M area)
\r
1014 if ((a&0xfe0000)==0x0c0000 && (Pico_mcd->s68k_regs[3]&4)) { // 0c0000-0dffff
\r
1016 wrdprintf("s68k_wram1M r32: [%06x] @%06x", a, SekPcS68k);
\r
1017 // if (!(Pico_mcd->s68k_regs[3]&4))
\r
1018 // dprintf("s68k_wram1M FIXME: wrong mode");
\r
1019 bank = !(Pico_mcd->s68k_regs[3]&1);
\r
1020 u16 *pm=(u16 *)(Pico_mcd->word_ram1M[bank]+(a&0x1fffe)); d = (pm[0]<<16)|pm[1];
\r
1021 wrdprintf("ret = %08x", d);
\r
1026 if ((a&0xff8000)==0xff0000) {
\r
1027 dprintf("s68k_pcm r32: [%06x] @%06x", a, SekPcS68k);
\r
1029 if (a >= 0x2000) {
\r
1031 d = Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][a&0xfff] << 16;
\r
1032 d |= Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][(a+1)&0xfff];
\r
1033 } else if (a >= 0x20) {
\r
1037 d = (Pico_mcd->pcm.ch[a].addr >> (PCM_STEP_SHIFT-8)) & 0xff0000;
\r
1038 d |= (Pico_mcd->pcm.ch[(a+1)&7].addr >> PCM_STEP_SHIFT) & 0xff;
\r
1040 d = Pico_mcd->pcm.ch[a>>2].addr >> PCM_STEP_SHIFT;
\r
1041 d = ((d<<16)&0xff0000) | ((d>>8)&0xff); // PCM chip is LE
\r
1044 dprintf("ret = %08x", d);
\r
1049 if ((a&0xff0000)==0xfe0000) {
\r
1050 dprintf("FIXME: s68k_bram r32: [%06x] @%06x", a, SekPcS68k);
\r
1051 a = (a>>1)&0x1fff;
\r
1052 d = Pico_mcd->bram[a++] << 16; // middle endian? TODO: verify against Fusion..
\r
1053 d|= Pico_mcd->bram[a++] << 24;
\r
1054 d|= Pico_mcd->bram[a++];
\r
1055 d|= Pico_mcd->bram[a++] << 8;
\r
1056 dprintf("ret = %08x", d);
\r
1060 dprintf("s68k r32: %06x, %08x @%06x", a&0xffffff, d, SekPcS68k);
\r
1064 #ifdef __debug_io2
\r
1065 dprintf("s68k r32: %06x, %08x @%06x", a&0xffffff, d, SekPcS68k);
\r
1072 #ifndef _ASM_CD_MEMORY_C
\r
1073 /* check: jaguar xj 220 (draws entire world using decode) */
\r
1074 static void decode_write8(u32 a, u8 d, int r3)
\r
1076 u8 *pd = Pico_mcd->word_ram1M[!(r3 & 1)] + (((a>>1)^1)&0x1ffff);
\r
1077 u8 oldmask = (a&1) ? 0xf0 : 0x0f;
\r
1081 if (!(a&1)) d <<= 4;
\r
1084 if ((!(*pd & (~oldmask))) && d) goto do_it;
\r
1085 } else if (r3 > 8) {
\r
1086 if (d) goto do_it;
\r
1093 *pd = d | (*pd & oldmask);
\r
1097 static void decode_write16(u32 a, u16 d, int r3)
\r
1099 u8 *pd = Pico_mcd->word_ram1M[!(r3 & 1)] + (((a>>1)^1)&0x1ffff);
\r
1101 //if ((a & 0x3ffff) < 0x28000) return;
\r
1109 if (!(dold & 0xf0)) dold |= d & 0xf0;
\r
1110 if (!(dold & 0x0f)) dold |= d & 0x0f;
\r
1112 } else if (r3 > 8) {
\r
1114 if (!(d & 0xf0)) d |= dold & 0xf0;
\r
1115 if (!(d & 0x0f)) d |= dold & 0x0f;
\r
1123 // -----------------------------------------------------------------
\r
1125 #ifdef _ASM_CD_MEMORY_C
\r
1126 void PicoWriteS68k8(u32 a,u8 d);
\r
1128 static void PicoWriteS68k8(u32 a,u8 d)
\r
1130 #ifdef __debug_io2
\r
1131 dprintf("s68k w8 : %06x, %02x @%06x", a&0xffffff, d, SekPcS68k);
\r
1137 if (a < 0x80000) {
\r
1138 u8 *pm=(u8 *)(Pico_mcd->prg_ram+(a^1));
\r
1139 if (a >= (Pico_mcd->s68k_regs[2]<<8)) *pm=d;
\r
1144 if ((a&0xfffe00) == 0xff8000) {
\r
1146 rdprintf("s68k_regs w8: [%02x] %02x @ %06x", a, d, SekPcS68k);
\r
1147 if (a >= 0x58 && a < 0x68)
\r
1148 gfx_cd_write16(a&~1, (d<<8)|d);
\r
1149 else s68k_reg_write8(a,d);
\r
1153 // word RAM (2M area)
\r
1154 if ((a&0xfc0000)==0x080000) { // 080000-0bffff
\r
1155 int r3 = Pico_mcd->s68k_regs[3];
\r
1156 wrdprintf("s68k_wram2M w8: [%06x] %02x @%06x", a, d, SekPcS68k);
\r
1157 if (r3 & 4) { // 1M decode mode?
\r
1158 decode_write8(a, d, r3);
\r
1160 // allow access in any mode, like Gens does
\r
1161 *(u8 *)(Pico_mcd->word_ram2M+((a^1)&0x3ffff))=d;
\r
1166 // word RAM (1M area)
\r
1167 if ((a&0xfe0000)==0x0c0000 && (Pico_mcd->s68k_regs[3]&4)) { // 0c0000-0dffff
\r
1168 // Wing Commander tries to write here in wrong mode
\r
1171 wrdprintf("s68k_wram1M w8: [%06x] %02x @%06x", a, d, SekPcS68k);
\r
1172 // if (!(Pico_mcd->s68k_regs[3]&4))
\r
1173 // dprintf("s68k_wram1M FIXME: wrong mode");
\r
1174 bank = !(Pico_mcd->s68k_regs[3]&1);
\r
1175 *(u8 *)(Pico_mcd->word_ram1M[bank]+((a^1)&0x1ffff))=d;
\r
1180 if ((a&0xff8000)==0xff0000) {
\r
1183 Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][(a>>1)&0xfff] = d;
\r
1184 else if (a < 0x12)
\r
1185 pcm_write(a>>1, d);
\r
1190 if ((a&0xff0000)==0xfe0000) {
\r
1191 Pico_mcd->bram[(a>>1)&0x1fff] = d;
\r
1196 dprintf("s68k w8 : %06x, %02x @%06x", a&0xffffff, d, SekPcS68k);
\r
1201 #ifdef _ASM_CD_MEMORY_C
\r
1202 void PicoWriteS68k16(u32 a,u16 d);
\r
1204 static void PicoWriteS68k16(u32 a,u16 d)
\r
1206 #ifdef __debug_io2
\r
1207 dprintf("s68k w16: %06x, %04x @%06x", a&0xffffff, d, SekPcS68k);
\r
1213 if (a < 0x80000) {
\r
1214 wrdprintf("s68k_prgram w16: [%06x] %04x @%06x", a, d, SekPcS68k);
\r
1215 if (a >= (Pico_mcd->s68k_regs[2]<<8)) // needed for Dungeon Explorer
\r
1216 *(u16 *)(Pico_mcd->prg_ram+a)=d;
\r
1221 if ((a&0xfffe00) == 0xff8000) {
\r
1223 rdprintf("s68k_regs w16: [%02x] %04x @ %06x", a, d, SekPcS68k);
\r
1224 if (a >= 0x58 && a < 0x68)
\r
1225 gfx_cd_write16(a, d);
\r
1227 if (a == 0xe) { // special case, 2 byte writes would be handled differently
\r
1228 Pico_mcd->s68k_regs[0xf] = d;
\r
1231 s68k_reg_write8(a, d>>8);
\r
1232 s68k_reg_write8(a+1,d&0xff);
\r
1237 // word RAM (2M area)
\r
1238 if ((a&0xfc0000)==0x080000) { // 080000-0bffff
\r
1239 int r3 = Pico_mcd->s68k_regs[3];
\r
1240 wrdprintf("s68k_wram2M w16: [%06x] %04x @%06x", a, d, SekPcS68k);
\r
1241 if (r3 & 4) { // 1M decode mode?
\r
1242 decode_write16(a, d, r3);
\r
1244 // allow access in any mode, like Gens does
\r
1245 *(u16 *)(Pico_mcd->word_ram2M+(a&0x3fffe))=d;
\r
1250 // word RAM (1M area)
\r
1251 if ((a&0xfe0000)==0x0c0000 && (Pico_mcd->s68k_regs[3]&4)) { // 0c0000-0dffff
\r
1254 wrdprintf("s68k_wram1M w16: [%06x] %04x @%06x", a, d, SekPcS68k);
\r
1255 // if (!(Pico_mcd->s68k_regs[3]&4))
\r
1256 // dprintf("s68k_wram1M FIXME: wrong mode");
\r
1257 bank = !(Pico_mcd->s68k_regs[3]&1);
\r
1258 *(u16 *)(Pico_mcd->word_ram1M[bank]+(a&0x1fffe))=d;
\r
1263 if ((a&0xff8000)==0xff0000) {
\r
1266 Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][(a>>1)&0xfff] = d;
\r
1267 else if (a < 0x12)
\r
1268 pcm_write(a>>1, d & 0xff);
\r
1273 if ((a&0xff0000)==0xfe0000) {
\r
1274 dprintf("s68k_bram w16: [%06x] %04x @%06x", a, d, SekPcS68k);
\r
1275 a = (a>>1)&0x1fff;
\r
1276 Pico_mcd->bram[a++] = d; // Gens does little endian here, an so do we..
\r
1277 Pico_mcd->bram[a++] = d >> 8;
\r
1282 dprintf("s68k w16: %06x, %04x @%06x", a&0xffffff, d, SekPcS68k);
\r
1287 #ifdef _ASM_CD_MEMORY_C
\r
1288 void PicoWriteS68k32(u32 a,u32 d);
\r
1290 static void PicoWriteS68k32(u32 a,u32 d)
\r
1292 #ifdef __debug_io2
\r
1293 dprintf("s68k w32: %06x, %08x @%06x", a&0xffffff, d, SekPcS68k);
\r
1299 if (a < 0x80000) {
\r
1300 if (a >= (Pico_mcd->s68k_regs[2]<<8)) {
\r
1301 u16 *pm=(u16 *)(Pico_mcd->prg_ram+a);
\r
1302 pm[0]=(u16)(d>>16); pm[1]=(u16)d;
\r
1308 if ((a&0xfffe00) == 0xff8000) {
\r
1310 rdprintf("s68k_regs w32: [%02x] %08x @ %06x", a, d, SekPcS68k);
\r
1311 if (a >= 0x58 && a < 0x68) {
\r
1312 gfx_cd_write16(a, d>>16);
\r
1313 gfx_cd_write16(a+2, d&0xffff);
\r
1315 if ((a&0x1fe) == 0xe) dprintf("s68k FIXME: w32 [%02x]", a&0x3f);
\r
1316 s68k_reg_write8(a, d>>24);
\r
1317 s68k_reg_write8(a+1,(d>>16)&0xff);
\r
1318 s68k_reg_write8(a+2,(d>>8) &0xff);
\r
1319 s68k_reg_write8(a+3, d &0xff);
\r
1324 // word RAM (2M area)
\r
1325 if ((a&0xfc0000)==0x080000) { // 080000-0bffff
\r
1326 int r3 = Pico_mcd->s68k_regs[3];
\r
1327 wrdprintf("s68k_wram2M w32: [%06x] %08x @%06x", a, d, SekPcS68k);
\r
1328 if (r3 & 4) { // 1M decode mode?
\r
1329 decode_write16(a , d >> 16, r3);
\r
1330 decode_write16(a+2, d , r3);
\r
1332 // allow access in any mode, like Gens does
\r
1333 u16 *pm=(u16 *)(Pico_mcd->word_ram2M+(a&0x3fffe));
\r
1334 pm[0]=(u16)(d>>16); pm[1]=(u16)d;
\r
1339 // word RAM (1M area)
\r
1340 if ((a&0xfe0000)==0x0c0000 && (Pico_mcd->s68k_regs[3]&4)) { // 0c0000-0dffff
\r
1344 wrdprintf("s68k_wram1M w32: [%06x] %08x @%06x", a, d, SekPcS68k);
\r
1345 // if (!(Pico_mcd->s68k_regs[3]&4))
\r
1346 // dprintf("s68k_wram1M FIXME: wrong mode");
\r
1347 bank = !(Pico_mcd->s68k_regs[3]&1);
\r
1348 pm=(u16 *)(Pico_mcd->word_ram1M[bank]+(a&0x1fffe));
\r
1349 pm[0]=(u16)(d>>16); pm[1]=(u16)d;
\r
1354 if ((a&0xff8000)==0xff0000) {
\r
1356 if (a >= 0x2000) {
\r
1358 Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][a&0xfff] = (d >> 16);
\r
1359 Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][(a+1)&0xfff] = d;
\r
1360 } else if (a < 0x12) {
\r
1362 pcm_write(a, (d>>16) & 0xff);
\r
1363 pcm_write(a+1, d & 0xff);
\r
1369 if ((a&0xff0000)==0xfe0000) {
\r
1370 dprintf("s68k_bram w32: [%06x] %08x @%06x", a, d, SekPcS68k);
\r
1371 a = (a>>1)&0x1fff;
\r
1372 Pico_mcd->bram[a++] = d >> 16; // middle endian? verify?
\r
1373 Pico_mcd->bram[a++] = d >> 24;
\r
1374 Pico_mcd->bram[a++] = d;
\r
1375 Pico_mcd->bram[a++] = d >> 8;
\r
1380 dprintf("s68k w32: %06x, %08x @%06x", a&0xffffff, d, SekPcS68k);
\r
1385 // -----------------------------------------------------------------
\r
1388 #if defined(EMU_C68K)
\r
1389 static __inline int PicoMemBaseM68k(u32 pc)
\r
1391 if ((pc&0xe00000)==0xe00000)
\r
1392 return (int)Pico.ram-(pc&0xff0000); // Program Counter in Ram
\r
1395 return (int)Pico_mcd->bios; // Program Counter in BIOS
\r
1397 if ((pc&0xfc0000)==0x200000)
\r
1399 if (!(Pico_mcd->s68k_regs[3]&4))
\r
1400 return (int)Pico_mcd->word_ram2M - 0x200000; // Program Counter in Word Ram
\r
1401 if (pc < 0x220000) {
\r
1402 int bank = (Pico_mcd->s68k_regs[3]&1);
\r
1403 return (int)Pico_mcd->word_ram1M[bank] - 0x200000;
\r
1407 // Error - Program Counter is invalid
\r
1408 dprintf("m68k FIXME: unhandled jump to %06x", pc);
\r
1410 return (int)Pico_mcd->bios;
\r
1414 static u32 PicoCheckPcM68k(u32 pc)
\r
1416 pc-=PicoCpu.membase; // Get real pc
\r
1419 PicoCpu.membase=PicoMemBaseM68k(pc);
\r
1421 return PicoCpu.membase+pc;
\r
1425 static __inline int PicoMemBaseS68k(u32 pc)
\r
1427 if (pc < 0x80000) // PRG RAM
\r
1428 return (int)Pico_mcd->prg_ram;
\r
1430 if ((pc&0xfc0000)==0x080000) // WORD RAM 2M area (assume we are in the right mode..)
\r
1431 return (int)Pico_mcd->word_ram2M - 0x080000;
\r
1433 if ((pc&0xfe0000)==0x0c0000) { // word RAM 1M area
\r
1434 int bank = !(Pico_mcd->s68k_regs[3]&1);
\r
1435 return (int)Pico_mcd->word_ram1M[bank] - 0x0c0000;
\r
1438 // Error - Program Counter is invalid
\r
1439 dprintf("s68k FIXME: unhandled jump to %06x", pc);
\r
1441 return (int)Pico_mcd->prg_ram;
\r
1445 static u32 PicoCheckPcS68k(u32 pc)
\r
1447 pc-=PicoCpuS68k.membase; // Get real pc
\r
1450 PicoCpuS68k.membase=PicoMemBaseS68k(pc);
\r
1452 return PicoCpuS68k.membase+pc;
\r
1457 void PicoMemSetupCD()
\r
1459 dprintf("PicoMemSetupCD()");
\r
1461 // Setup m68k memory callbacks:
\r
1462 PicoCpu.checkpc=PicoCheckPcM68k;
\r
1463 PicoCpu.fetch8 =PicoCpu.read8 =PicoReadM68k8;
\r
1464 PicoCpu.fetch16=PicoCpu.read16=PicoReadM68k16;
\r
1465 PicoCpu.fetch32=PicoCpu.read32=PicoReadM68k32;
\r
1466 PicoCpu.write8 =PicoWriteM68k8;
\r
1467 PicoCpu.write16=PicoWriteM68k16;
\r
1468 PicoCpu.write32=PicoWriteM68k32;
\r
1470 PicoCpuS68k.checkpc=PicoCheckPcS68k;
\r
1471 PicoCpuS68k.fetch8 =PicoCpuS68k.read8 =PicoReadS68k8;
\r
1472 PicoCpuS68k.fetch16=PicoCpuS68k.read16=PicoReadS68k16;
\r
1473 PicoCpuS68k.fetch32=PicoCpuS68k.read32=PicoReadS68k32;
\r
1474 PicoCpuS68k.write8 =PicoWriteS68k8;
\r
1475 PicoCpuS68k.write16=PicoWriteS68k16;
\r
1476 PicoCpuS68k.write32=PicoWriteS68k32;
\r
1478 // m68k_poll_addr = m68k_poll_cnt = 0;
\r
1479 s68k_poll_adclk = s68k_poll_cnt = 0;
\r
1484 unsigned char PicoReadCD8w (unsigned int a) {
\r
1485 return m68ki_cpu_p == &PicoS68kCPU ? PicoReadS68k8(a) : PicoReadM68k8(a);
\r
1487 unsigned short PicoReadCD16w(unsigned int a) {
\r
1488 return m68ki_cpu_p == &PicoS68kCPU ? PicoReadS68k16(a) : PicoReadM68k16(a);
\r
1490 unsigned int PicoReadCD32w(unsigned int a) {
\r
1491 return m68ki_cpu_p == &PicoS68kCPU ? PicoReadS68k32(a) : PicoReadM68k32(a);
\r
1493 void PicoWriteCD8w (unsigned int a, unsigned char d) {
\r
1494 if (m68ki_cpu_p == &PicoS68kCPU) PicoWriteS68k8(a, d); else PicoWriteM68k8(a, d);
\r
1496 void PicoWriteCD16w(unsigned int a, unsigned short d) {
\r
1497 if (m68ki_cpu_p == &PicoS68kCPU) PicoWriteS68k16(a, d); else PicoWriteM68k16(a, d);
\r
1499 void PicoWriteCD32w(unsigned int a, unsigned int d) {
\r
1500 if (m68ki_cpu_p == &PicoS68kCPU) PicoWriteS68k32(a, d); else PicoWriteM68k32(a, d);
\r
1503 // these are allowed to access RAM
\r
1504 unsigned int m68k_read_pcrelative_CD8 (unsigned int a) {
\r
1506 if(m68ki_cpu_p == &PicoS68kCPU) {
\r
1507 if (a < 0x80000) return *(u8 *)(Pico_mcd->prg_ram+(a^1)); // PRG Ram
\r
1508 if ((a&0xfc0000)==0x080000 && !(Pico_mcd->s68k_regs[3]&4)) // word RAM (2M area: 080000-0bffff)
\r
1509 return *(u8 *)(Pico_mcd->word_ram2M+((a^1)&0x3ffff));
\r
1510 if ((a&0xfe0000)==0x0c0000 && (Pico_mcd->s68k_regs[3]&4)) { // word RAM (1M area: 0c0000-0dffff)
\r
1511 int bank = !(Pico_mcd->s68k_regs[3]&1);
\r
1512 return *(u8 *)(Pico_mcd->word_ram1M[bank]+((a^1)&0x1ffff));
\r
1514 dprintf("s68k_read_pcrelative_CD8 FIXME: can't handle %06x", a);
\r
1516 if((a&0xe00000)==0xe00000) return *(u8 *)(Pico.ram+((a^1)&0xffff)); // Ram
\r
1517 if(a<0x20000) return *(u8 *)(Pico.rom+(a^1)); // Bios
\r
1518 if((a&0xfc0000)==0x200000) { // word RAM
\r
1519 if(!(Pico_mcd->s68k_regs[3]&4)) // 2M?
\r
1520 return *(u8 *)(Pico_mcd->word_ram2M+((a^1)&0x3ffff));
\r
1521 else if (a < 0x220000) {
\r
1522 int bank = Pico_mcd->s68k_regs[3]&1;
\r
1523 return *(u8 *)(Pico_mcd->word_ram1M[bank]+((a^1)&0x1ffff));
\r
1526 dprintf("m68k_read_pcrelative_CD8 FIXME: can't handle %06x", a);
\r
1528 return 0;//(u8) lastread_d;
\r
1530 unsigned int m68k_read_pcrelative_CD16(unsigned int a) {
\r
1532 if(m68ki_cpu_p == &PicoS68kCPU) {
\r
1533 if (a < 0x80000) return *(u16 *)(Pico_mcd->prg_ram+(a&~1)); // PRG Ram
\r
1534 if ((a&0xfc0000)==0x080000 && !(Pico_mcd->s68k_regs[3]&4)) // word RAM (2M area: 080000-0bffff)
\r
1535 return *(u16 *)(Pico_mcd->word_ram2M+(a&0x3fffe));
\r
1536 if ((a&0xfe0000)==0x0c0000 && (Pico_mcd->s68k_regs[3]&4)) { // word RAM (1M area: 0c0000-0dffff)
\r
1537 int bank = !(Pico_mcd->s68k_regs[3]&1);
\r
1538 return *(u16 *)(Pico_mcd->word_ram1M[bank]+(a&0x1fffe));
\r
1540 dprintf("s68k_read_pcrelative_CD16 FIXME: can't handle %06x", a);
\r
1542 if((a&0xe00000)==0xe00000) return *(u16 *)(Pico.ram+(a&0xfffe)); // Ram
\r
1543 if(a<0x20000) return *(u16 *)(Pico.rom+(a&~1)); // Bios
\r
1544 if((a&0xfc0000)==0x200000) { // word RAM
\r
1545 if(!(Pico_mcd->s68k_regs[3]&4)) // 2M?
\r
1546 return *(u16 *)(Pico_mcd->word_ram2M+(a&0x3fffe));
\r
1547 else if (a < 0x220000) {
\r
1548 int bank = Pico_mcd->s68k_regs[3]&1;
\r
1549 return *(u16 *)(Pico_mcd->word_ram1M[bank]+(a&0x1fffe));
\r
1552 dprintf("m68k_read_pcrelative_CD16 FIXME: can't handle %06x", a);
\r
1556 unsigned int m68k_read_pcrelative_CD32(unsigned int a) {
\r
1559 if(m68ki_cpu_p == &PicoS68kCPU) {
\r
1560 if (a < 0x80000) { u16 *pm=(u16 *)(Pico_mcd->prg_ram+(a&~1)); return (pm[0]<<16)|pm[1]; } // PRG Ram
\r
1561 if ((a&0xfc0000)==0x080000 && !(Pico_mcd->s68k_regs[3]&4)) // word RAM (2M area: 080000-0bffff)
\r
1562 { pm=(u16 *)(Pico_mcd->word_ram2M+(a&0x3fffe)); return (pm[0]<<16)|pm[1]; }
\r
1563 if ((a&0xfe0000)==0x0c0000 && (Pico_mcd->s68k_regs[3]&4)) { // word RAM (1M area: 0c0000-0dffff)
\r
1564 int bank = !(Pico_mcd->s68k_regs[3]&1);
\r
1565 pm=(u16 *)(Pico_mcd->word_ram1M[bank]+(a&0x1fffe));
\r
1566 return (pm[0]<<16)|pm[1];
\r
1568 dprintf("s68k_read_pcrelative_CD32 FIXME: can't handle %06x", a);
\r
1570 if((a&0xe00000)==0xe00000) { u16 *pm=(u16 *)(Pico.ram+(a&0xfffe)); return (pm[0]<<16)|pm[1]; } // Ram
\r
1571 if(a<0x20000) { u16 *pm=(u16 *)(Pico.rom+(a&~1)); return (pm[0]<<16)|pm[1]; }
\r
1572 if((a&0xfc0000)==0x200000) { // word RAM
\r
1573 if(!(Pico_mcd->s68k_regs[3]&4)) // 2M?
\r
1574 { pm=(u16 *)(Pico_mcd->word_ram2M+(a&0x3fffe)); return (pm[0]<<16)|pm[1]; }
\r
1575 else if (a < 0x220000) {
\r
1576 int bank = Pico_mcd->s68k_regs[3]&1;
\r
1577 pm=(u16 *)(Pico_mcd->word_ram1M[bank]+(a&0x1fffe));
\r
1578 return (pm[0]<<16)|pm[1];
\r
1581 dprintf("m68k_read_pcrelative_CD32 FIXME: can't handle %06x", a);
\r
1585 #endif // EMU_M68K
\r