2 * Memory I/O handlers for Sega/Mega CD.
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3 * (C) notaz, 2007-2009
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5 * This work is licensed under the terms of MAME license.
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6 * See COPYING file in the top-level directory.
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9 #include "../pico_int.h"
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10 #include "../memory.h"
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14 uptr s68k_read8_map [0x1000000 >> M68K_MEM_SHIFT];
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15 uptr s68k_read16_map [0x1000000 >> M68K_MEM_SHIFT];
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16 uptr s68k_write8_map [0x1000000 >> M68K_MEM_SHIFT];
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17 uptr s68k_write16_map[0x1000000 >> M68K_MEM_SHIFT];
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19 MAKE_68K_READ8(s68k_read8, s68k_read8_map)
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20 MAKE_68K_READ16(s68k_read16, s68k_read16_map)
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21 MAKE_68K_READ32(s68k_read32, s68k_read16_map)
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22 MAKE_68K_WRITE8(s68k_write8, s68k_write8_map)
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23 MAKE_68K_WRITE16(s68k_write16, s68k_write16_map)
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24 MAKE_68K_WRITE32(s68k_write32, s68k_write16_map)
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26 // -----------------------------------------------------------------
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28 // provided by ASM code:
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29 #ifdef _ASM_CD_MEMORY_C
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30 u32 PicoReadS68k8_pr(u32 a);
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31 u32 PicoReadS68k16_pr(u32 a);
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32 void PicoWriteS68k8_pr(u32 a, u32 d);
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33 void PicoWriteS68k16_pr(u32 a, u32 d);
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35 u32 PicoReadM68k8_cell0(u32 a);
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36 u32 PicoReadM68k8_cell1(u32 a);
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37 u32 PicoReadM68k16_cell0(u32 a);
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38 u32 PicoReadM68k16_cell1(u32 a);
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39 void PicoWriteM68k8_cell0(u32 a, u32 d);
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40 void PicoWriteM68k8_cell1(u32 a, u32 d);
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41 void PicoWriteM68k16_cell0(u32 a, u32 d);
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42 void PicoWriteM68k16_cell1(u32 a, u32 d);
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44 u32 PicoReadS68k8_dec0(u32 a);
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45 u32 PicoReadS68k8_dec1(u32 a);
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46 u32 PicoReadS68k16_dec0(u32 a);
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47 u32 PicoReadS68k16_dec1(u32 a);
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48 void PicoWriteS68k8_dec_m0b0(u32 a, u32 d);
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49 void PicoWriteS68k8_dec_m1b0(u32 a, u32 d);
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50 void PicoWriteS68k8_dec_m2b0(u32 a, u32 d);
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51 void PicoWriteS68k8_dec_m0b1(u32 a, u32 d);
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52 void PicoWriteS68k8_dec_m1b1(u32 a, u32 d);
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53 void PicoWriteS68k8_dec_m2b1(u32 a, u32 d);
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54 void PicoWriteS68k16_dec_m0b0(u32 a, u32 d);
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55 void PicoWriteS68k16_dec_m1b0(u32 a, u32 d);
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56 void PicoWriteS68k16_dec_m2b0(u32 a, u32 d);
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57 void PicoWriteS68k16_dec_m0b1(u32 a, u32 d);
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58 void PicoWriteS68k16_dec_m1b1(u32 a, u32 d);
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59 void PicoWriteS68k16_dec_m2b1(u32 a, u32 d);
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62 static void remap_prg_window(u32 r1, u32 r3);
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63 static void remap_word_ram(u32 r3);
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66 #define POLL_LIMIT 16
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67 #define POLL_CYCLES 64
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69 void m68k_comm_check(u32 a)
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71 pcd_sync_s68k(SekCyclesDone(), 0);
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72 if (SekNotPolling || a != Pico_mcd->m.m68k_poll_a) {
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73 Pico_mcd->m.m68k_poll_a = a;
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74 Pico_mcd->m.m68k_poll_cnt = 0;
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78 Pico_mcd->m.m68k_poll_cnt++;
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81 #ifndef _ASM_CD_MEMORY_C
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82 static u32 m68k_reg_read16(u32 a)
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89 // here IFL2 is always 0, just like in Gens
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90 d = ((Pico_mcd->s68k_regs[0x33] << 13) & 0x8000)
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91 | Pico_mcd->m.busreq;
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95 d = (Pico_mcd->s68k_regs[a]<<8) | (Pico_mcd->s68k_regs[a+1]&0xc7);
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96 elprintf(EL_CDREG3, "m68k_regs r3: %02x @%06x", (u8)d, SekPc);
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99 d = Pico_mcd->s68k_regs[4]<<8;
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102 d = *(u16 *)(Pico_mcd->bios + 0x72);
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105 d = Read_CDC_Host(0);
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108 elprintf(EL_UIO, "m68k FIXME: reserved read");
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110 case 0xC: // 384 cycle stopwatch timer
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112 d = pcd_cycles_m68k_to_s68k(SekCyclesDone());
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113 d = (d - Pico_mcd->m.stopwatch_base_c) / 384;
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115 elprintf(EL_CDREGS, "m68k stopwatch timer read (%04x)", d);
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120 // comm flag/cmd/status (0xE-0x2F)
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121 m68k_comm_check(a);
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122 d = (Pico_mcd->s68k_regs[a]<<8) | Pico_mcd->s68k_regs[a+1];
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126 elprintf(EL_UIO, "m68k_regs FIXME invalid read @ %02x", a);
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133 #ifndef _ASM_CD_MEMORY_C
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136 void m68k_reg_write8(u32 a, u32 d)
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144 if (d && (Pico_mcd->s68k_regs[0x33] & PCDS_IEN2)) {
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145 elprintf(EL_INTS, "m68k: s68k irq 2");
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146 pcd_sync_s68k(SekCyclesDone(), 0);
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147 SekInterruptS68k(2);
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152 dold = Pico_mcd->m.busreq;
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154 d |= 2; // verified: can't release bus on reset
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158 pcd_sync_s68k(SekCyclesDone(), 0);
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160 if ((dold ^ d) & 1)
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161 elprintf(EL_INTSW, "m68k: s68k reset %i", !(d&1));
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163 Pico_mcd->m.state_flags |= PCD_ST_S68K_RST;
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164 else if (d == 1 && (Pico_mcd->m.state_flags & PCD_ST_S68K_RST)) {
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165 Pico_mcd->m.state_flags &= ~PCD_ST_S68K_RST;
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166 elprintf(EL_CDREGS, "m68k: resetting s68k");
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169 if ((dold ^ d) & 2) {
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170 elprintf(EL_INTSW, "m68k: s68k brq %i", d >> 1);
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171 remap_prg_window(d, Pico_mcd->s68k_regs[3]);
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173 Pico_mcd->m.busreq = d;
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176 elprintf(EL_CDREGS, "m68k: prg wp=%02x", d);
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177 Pico_mcd->s68k_regs[2] = d; // really use s68k side register
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180 dold = Pico_mcd->s68k_regs[3];
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181 elprintf(EL_CDREG3, "m68k_regs w3: %02x @%06x", (u8)d, SekPc);
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182 if ((d ^ dold) & 0xc0) {
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183 elprintf(EL_CDREGS, "m68k: prg bank: %i -> %i",
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184 (Pico_mcd->s68k_regs[a]>>6), ((d>>6)&3));
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185 remap_prg_window(Pico_mcd->m.busreq, d);
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188 // 2M mode state is tracked regardless of current mode
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190 Pico_mcd->m.dmna_ret_2m |= 2;
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191 Pico_mcd->m.dmna_ret_2m &= ~1;
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193 if (dold & 4) { // 1M mode
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194 d ^= 2; // 0 sets DMNA, 1 does nothing
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195 d = (d & 0xc2) | (dold & 0x1f);
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198 d = (d & 0xc0) | (dold & 0x1c) | Pico_mcd->m.dmna_ret_2m;
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202 Pico_mcd->bios[0x72 + 1] = d; // simple hint vector changer
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205 Pico_mcd->bios[0x72] = d;
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206 elprintf(EL_CDREGS, "hint vector set to %04x%04x",
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207 ((u16 *)Pico_mcd->bios)[0x70/2], ((u16 *)Pico_mcd->bios)[0x72/2]);
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215 if ((a&0xf0) == 0x10)
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218 elprintf(EL_UIO, "m68k FIXME: invalid write? [%02x] %02x", a, d);
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222 if (d == Pico_mcd->s68k_regs[a])
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225 pcd_sync_s68k(SekCyclesDone(), 0);
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226 Pico_mcd->s68k_regs[a] = d;
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227 if (Pico_mcd->m.s68k_poll_a == (a & ~1)
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228 && Pico_mcd->m.s68k_poll_cnt > POLL_LIMIT)
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231 Pico_mcd->m.s68k_poll_a = 0;
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232 elprintf(EL_CDPOLL, "s68k poll release, a=%02x", a);
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236 u32 s68k_poll_detect(u32 a, u32 d)
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238 #ifdef USE_POLL_DETECT
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239 u32 cycles, cnt = 0;
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240 if (SekIsStoppedS68k())
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243 cycles = SekCyclesDoneS68k();
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244 if (!SekNotPolling && a == Pico_mcd->m.s68k_poll_a) {
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245 u32 clkdiff = cycles - Pico_mcd->m.s68k_poll_clk;
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246 if (clkdiff <= POLL_CYCLES) {
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247 cnt = Pico_mcd->m.s68k_poll_cnt + 1;
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248 //printf("-- diff: %u, cnt = %i\n", clkdiff, cnt);
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249 if (Pico_mcd->m.s68k_poll_cnt > POLL_LIMIT) {
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251 elprintf(EL_CDPOLL, "s68k poll detected @%06x, a=%02x",
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256 Pico_mcd->m.s68k_poll_a = a;
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257 Pico_mcd->m.s68k_poll_clk = cycles;
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258 Pico_mcd->m.s68k_poll_cnt = cnt;
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259 SekNotPollingS68k = 0;
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264 #define READ_FONT_DATA(basemask) \
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266 unsigned int fnt = *(unsigned int *)(Pico_mcd->s68k_regs + 0x4c); \
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267 unsigned int col0 = (fnt >> 8) & 0x0f, col1 = (fnt >> 12) & 0x0f; \
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268 if (fnt & (basemask << 0)) d = col1 ; else d = col0; \
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269 if (fnt & (basemask << 1)) d |= col1 << 4; else d |= col0 << 4; \
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270 if (fnt & (basemask << 2)) d |= col1 << 8; else d |= col0 << 8; \
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271 if (fnt & (basemask << 3)) d |= col1 << 12; else d |= col0 << 12; \
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275 #ifndef _ASM_CD_MEMORY_C
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278 u32 s68k_reg_read16(u32 a)
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284 return ((Pico_mcd->s68k_regs[0]&3)<<8) | 1; // ver = 0, not in reset state
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286 d = (Pico_mcd->s68k_regs[2]<<8) | (Pico_mcd->s68k_regs[3]&0x1f);
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287 elprintf(EL_CDREG3, "s68k_regs r3: %02x @%06x", (u8)d, SekPcS68k);
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288 return s68k_poll_detect(a, d);
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290 return CDC_Read_Reg();
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292 return Read_CDC_Host(1); // Gens returns 0 here on byte reads
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294 d = SekCyclesDoneS68k() - Pico_mcd->m.stopwatch_base_c;
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297 elprintf(EL_CDREGS, "s68k stopwatch timer read (%04x)", d);
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300 elprintf(EL_CDREGS, "s68k int3 timer read (%02x)", Pico_mcd->s68k_regs[31]);
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301 return Pico_mcd->s68k_regs[31];
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302 case 0x34: // fader
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303 return 0; // no busy bit
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304 case 0x50: // font data (check: Lunar 2, Silpheed)
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305 READ_FONT_DATA(0x00100000);
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308 READ_FONT_DATA(0x00010000);
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311 READ_FONT_DATA(0x10000000);
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314 READ_FONT_DATA(0x01000000);
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318 d = (Pico_mcd->s68k_regs[a]<<8) | Pico_mcd->s68k_regs[a+1];
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320 if (a >= 0x0e && a < 0x30)
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321 return s68k_poll_detect(a, d);
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326 #ifndef _ASM_CD_MEMORY_C
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329 void s68k_reg_write8(u32 a, u32 d)
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331 // Warning: d might have upper bits set
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338 return; // only m68k can change WP
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340 int dold = Pico_mcd->s68k_regs[3];
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341 elprintf(EL_CDREG3, "s68k_regs w3: %02x @%06x", (u8)d, SekPcS68k);
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347 Pico_mcd->m.dmna_ret_2m |= 1;
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348 Pico_mcd->m.dmna_ret_2m &= ~2; // DMNA clears
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354 elprintf(EL_CDREG3, "wram mode 2M->1M");
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355 wram_2M_to_1M(Pico_mcd->word_ram2M);
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358 if ((d ^ dold) & 0x1d)
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361 if ((d ^ dold) & 0x05)
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362 d &= ~2; // clear DMNA - swap complete
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367 elprintf(EL_CDREG3, "wram mode 1M->2M");
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368 wram_1M_to_2M(Pico_mcd->word_ram2M);
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371 d = (d & ~3) | Pico_mcd->m.dmna_ret_2m;
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376 elprintf(EL_CDREGS, "s68k CDC dest: %x", d&7);
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377 Pico_mcd->s68k_regs[4] = (Pico_mcd->s68k_regs[4]&0xC0) | (d&7); // CDC mode
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380 //dprintf("s68k CDC reg addr: %x", d&0xf);
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386 elprintf(EL_CDREGS, "s68k set CDC dma addr");
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389 case 0xd: // 384 cycle stopwatch timer
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390 elprintf(EL_CDREGS|EL_CD, "s68k clear stopwatch (%x)", d);
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391 // does this also reset internal 384 cycle counter?
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392 Pico_mcd->m.stopwatch_base_c = SekCyclesDoneS68k();
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398 case 0x31: // 384 cycle int3 timer
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400 elprintf(EL_CDREGS|EL_CD, "s68k set int3 timer: %02x", d);
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401 Pico_mcd->s68k_regs[a] = (u8) d;
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402 if (d) // d or d+1??
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403 pcd_event_schedule_s68k(PCD_EVENT_TIMER3, d * 384);
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405 pcd_event_schedule(0, PCD_EVENT_TIMER3, 0);
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407 case 0x33: // IRQ mask
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408 elprintf(EL_CDREGS|EL_CD, "s68k irq mask: %02x", d);
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410 if ((d ^ Pico_mcd->s68k_regs[0x33]) & d & PCDS_IEN4) {
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411 if (Pico_mcd->s68k_regs[0x37] & 4)
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412 CDD_Export_Status();
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415 case 0x34: // fader
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416 Pico_mcd->s68k_regs[a] = (u8) d & 0x7f;
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419 return; // d/m bit is unsetable
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421 u32 d_old = Pico_mcd->s68k_regs[0x37];
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422 Pico_mcd->s68k_regs[0x37] = d&7;
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423 if ((d&4) && !(d_old&4)) {
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424 CDD_Export_Status();
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429 Pico_mcd->s68k_regs[a] = (u8) d;
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430 CDD_Import_Command();
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434 if ((a&0x1f0) == 0x20)
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437 if ((a&0x1f0) == 0x10 || (a >= 0x38 && a < 0x42))
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439 elprintf(EL_UIO, "s68k FIXME: invalid write @ %02x?", a);
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443 Pico_mcd->s68k_regs[a] = (u8) d;
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447 Pico_mcd->s68k_regs[a] = (u8) d;
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448 if (Pico_mcd->m.m68k_poll_cnt)
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450 Pico_mcd->m.m68k_poll_cnt = 0;
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453 // -----------------------------------------------------------------
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455 // -----------------------------------------------------------------
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457 #ifndef _ASM_CD_MEMORY_C
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458 #include "cell_map.c"
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460 // WORD RAM, cell aranged area (220000 - 23ffff)
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461 static u32 PicoReadM68k8_cell0(u32 a)
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463 a = (a&3) | (cell_map(a >> 2) << 2); // cell arranged
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464 return Pico_mcd->word_ram1M[0][a ^ 1];
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467 static u32 PicoReadM68k8_cell1(u32 a)
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469 a = (a&3) | (cell_map(a >> 2) << 2);
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470 return Pico_mcd->word_ram1M[1][a ^ 1];
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473 static u32 PicoReadM68k16_cell0(u32 a)
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475 a = (a&2) | (cell_map(a >> 2) << 2);
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476 return *(u16 *)(Pico_mcd->word_ram1M[0] + a);
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479 static u32 PicoReadM68k16_cell1(u32 a)
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481 a = (a&2) | (cell_map(a >> 2) << 2);
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482 return *(u16 *)(Pico_mcd->word_ram1M[1] + a);
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485 static void PicoWriteM68k8_cell0(u32 a, u32 d)
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487 a = (a&3) | (cell_map(a >> 2) << 2);
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488 Pico_mcd->word_ram1M[0][a ^ 1] = d;
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491 static void PicoWriteM68k8_cell1(u32 a, u32 d)
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493 a = (a&3) | (cell_map(a >> 2) << 2);
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494 Pico_mcd->word_ram1M[1][a ^ 1] = d;
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497 static void PicoWriteM68k16_cell0(u32 a, u32 d)
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499 a = (a&3) | (cell_map(a >> 2) << 2);
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500 *(u16 *)(Pico_mcd->word_ram1M[0] + a) = d;
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503 static void PicoWriteM68k16_cell1(u32 a, u32 d)
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505 a = (a&3) | (cell_map(a >> 2) << 2);
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506 *(u16 *)(Pico_mcd->word_ram1M[1] + a) = d;
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510 // RAM cart (40000 - 7fffff, optional)
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511 static u32 PicoReadM68k8_ramc(u32 a)
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514 if (a == 0x400001) {
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515 if (SRam.data != NULL)
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520 if ((a & 0xfe0000) == 0x600000) {
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521 if (SRam.data != NULL)
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522 d = SRam.data[((a >> 1) & 0xffff) + 0x2000];
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527 return Pico_mcd->m.bcram_reg;
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529 elprintf(EL_UIO, "m68k unmapped r8 [%06x] @%06x", a, SekPc);
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533 static u32 PicoReadM68k16_ramc(u32 a)
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535 elprintf(EL_ANOMALY, "ramcart r16: [%06x] @%06x", a, SekPcS68k);
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536 return PicoReadM68k8_ramc(a + 1);
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539 static void PicoWriteM68k8_ramc(u32 a, u32 d)
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541 if ((a & 0xfe0000) == 0x600000) {
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542 if (SRam.data != NULL && (Pico_mcd->m.bcram_reg & 1)) {
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543 SRam.data[((a>>1) & 0xffff) + 0x2000] = d;
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549 if (a == 0x7fffff) {
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550 Pico_mcd->m.bcram_reg = d;
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554 elprintf(EL_UIO, "m68k unmapped w8 [%06x] %02x @%06x",
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555 a, d & 0xff, SekPc);
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558 static void PicoWriteM68k16_ramc(u32 a, u32 d)
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560 elprintf(EL_ANOMALY, "ramcart w16: [%06x] %04x @%06x",
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562 PicoWriteM68k8_ramc(a + 1, d);
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565 // IO/control/cd registers (a10000 - ...)
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566 #ifndef _ASM_CD_MEMORY_C
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567 u32 PicoRead8_mcd_io(u32 a)
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570 if ((a & 0xff00) == 0x2000) { // a12000 - a120ff
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571 d = m68k_reg_read16(a); // TODO: m68k_reg_read8
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575 elprintf(EL_CDREGS, "m68k_regs r8: [%02x] %02x @%06x",
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576 a & 0x3f, d, SekPc);
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580 // fallback to default MD handler
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581 return PicoRead8_io(a);
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584 u32 PicoRead16_mcd_io(u32 a)
\r
587 if ((a & 0xff00) == 0x2000) {
\r
588 d = m68k_reg_read16(a);
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589 elprintf(EL_CDREGS, "m68k_regs r16: [%02x] %04x @%06x",
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590 a & 0x3f, d, SekPc);
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594 return PicoRead16_io(a);
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597 void PicoWrite8_mcd_io(u32 a, u32 d)
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599 if ((a & 0xff00) == 0x2000) { // a12000 - a120ff
\r
600 elprintf(EL_CDREGS, "m68k_regs w8: [%02x] %02x @%06x",
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601 a & 0x3f, d, SekPc);
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602 m68k_reg_write8(a, d);
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606 PicoWrite16_io(a, d);
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609 void PicoWrite16_mcd_io(u32 a, u32 d)
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611 if ((a & 0xff00) == 0x2000) { // a12000 - a120ff
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612 elprintf(EL_CDREGS, "m68k_regs w16: [%02x] %04x @%06x",
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613 a & 0x3f, d, SekPc);
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615 m68k_reg_write8(a, d >> 8);
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616 if ((a & 0x3e) != 0x0e) // special case
\r
617 m68k_reg_write8(a + 1, d & 0xff);
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621 PicoWrite16_io(a, d);
\r
625 // -----------------------------------------------------------------
\r
627 // -----------------------------------------------------------------
\r
629 static u32 s68k_unmapped_read8(u32 a)
\r
631 elprintf(EL_UIO, "s68k unmapped r8 [%06x] @%06x", a, SekPc);
\r
635 static u32 s68k_unmapped_read16(u32 a)
\r
637 elprintf(EL_UIO, "s68k unmapped r16 [%06x] @%06x", a, SekPc);
\r
641 static void s68k_unmapped_write8(u32 a, u32 d)
\r
643 elprintf(EL_UIO, "s68k unmapped w8 [%06x] %02x @%06x",
\r
644 a, d & 0xff, SekPc);
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647 static void s68k_unmapped_write16(u32 a, u32 d)
\r
649 elprintf(EL_UIO, "s68k unmapped w16 [%06x] %04x @%06x",
\r
650 a, d & 0xffff, SekPc);
\r
653 // PRG RAM protected range (000000 - 01fdff)?
\r
654 // XXX verify: ff00 or 1fe00 max?
\r
655 static void PicoWriteS68k8_prgwp(u32 a, u32 d)
\r
657 if (a >= (Pico_mcd->s68k_regs[2] << 9))
\r
658 Pico_mcd->prg_ram[a ^ 1] = d;
\r
661 static void PicoWriteS68k16_prgwp(u32 a, u32 d)
\r
663 if (a >= (Pico_mcd->s68k_regs[2] << 9))
\r
664 *(u16 *)(Pico_mcd->prg_ram + a) = d;
\r
667 #ifndef _ASM_CD_MEMORY_C
\r
669 // decode (080000 - 0bffff, in 1M mode)
\r
670 static u32 PicoReadS68k8_dec0(u32 a)
\r
672 u32 d = Pico_mcd->word_ram1M[0][((a >> 1) ^ 1) & 0x1ffff];
\r
680 static u32 PicoReadS68k8_dec1(u32 a)
\r
682 u32 d = Pico_mcd->word_ram1M[1][((a >> 1) ^ 1) & 0x1ffff];
\r
690 static u32 PicoReadS68k16_dec0(u32 a)
\r
692 u32 d = Pico_mcd->word_ram1M[0][((a >> 1) ^ 1) & 0x1ffff];
\r
698 static u32 PicoReadS68k16_dec1(u32 a)
\r
700 u32 d = Pico_mcd->word_ram1M[1][((a >> 1) ^ 1) & 0x1ffff];
\r
706 /* check: jaguar xj 220 (draws entire world using decode) */
\r
707 #define mk_decode_w8(bank) \
\r
708 static void PicoWriteS68k8_dec_m0b##bank(u32 a, u32 d) \
\r
710 u8 *pd = &Pico_mcd->word_ram1M[bank][((a >> 1) ^ 1) & 0x1ffff]; \
\r
713 *pd = (*pd & 0x0f) | (d << 4); \
\r
715 *pd = (*pd & 0xf0) | (d & 0x0f); \
\r
718 static void PicoWriteS68k8_dec_m1b##bank(u32 a, u32 d) \
\r
720 u8 *pd = &Pico_mcd->word_ram1M[bank][((a >> 1) ^ 1) & 0x1ffff]; \
\r
721 u8 mask = (a & 1) ? 0x0f : 0xf0; \
\r
723 if (!(*pd & mask) && (d & 0x0f)) /* underwrite */ \
\r
724 PicoWriteS68k8_dec_m0b##bank(a, d); \
\r
727 static void PicoWriteS68k8_dec_m2b##bank(u32 a, u32 d) /* ...and m3? */ \
\r
729 if (d & 0x0f) /* overwrite */ \
\r
730 PicoWriteS68k8_dec_m0b##bank(a, d); \
\r
736 #define mk_decode_w16(bank) \
\r
737 static void PicoWriteS68k16_dec_m0b##bank(u32 a, u32 d) \
\r
739 u8 *pd = &Pico_mcd->word_ram1M[bank][((a >> 1) ^ 1) & 0x1ffff]; \
\r
742 *pd = d | (d >> 4); \
\r
745 static void PicoWriteS68k16_dec_m1b##bank(u32 a, u32 d) \
\r
747 u8 *pd = &Pico_mcd->word_ram1M[bank][((a >> 1) ^ 1) & 0x1ffff]; \
\r
749 d &= 0x0f0f; /* underwrite */ \
\r
750 if (!(*pd & 0xf0)) *pd |= d >> 4; \
\r
751 if (!(*pd & 0x0f)) *pd |= d; \
\r
754 static void PicoWriteS68k16_dec_m2b##bank(u32 a, u32 d) \
\r
756 u8 *pd = &Pico_mcd->word_ram1M[bank][((a >> 1) ^ 1) & 0x1ffff]; \
\r
758 d &= 0x0f0f; /* overwrite */ \
\r
761 if (!(d & 0xf0)) d |= *pd & 0xf0; \
\r
762 if (!(d & 0x0f)) d |= *pd & 0x0f; \
\r
771 // backup RAM (fe0000 - feffff)
\r
772 static u32 PicoReadS68k8_bram(u32 a)
\r
774 return Pico_mcd->bram[(a>>1)&0x1fff];
\r
777 static u32 PicoReadS68k16_bram(u32 a)
\r
780 elprintf(EL_ANOMALY, "FIXME: s68k_bram r16: [%06x] @%06x", a, SekPcS68k);
\r
781 a = (a >> 1) & 0x1fff;
\r
782 d = Pico_mcd->bram[a++];
\r
783 d|= Pico_mcd->bram[a++] << 8; // probably wrong, TODO: verify
\r
787 static void PicoWriteS68k8_bram(u32 a, u32 d)
\r
789 Pico_mcd->bram[(a >> 1) & 0x1fff] = d;
\r
793 static void PicoWriteS68k16_bram(u32 a, u32 d)
\r
795 elprintf(EL_ANOMALY, "s68k_bram w16: [%06x] %04x @%06x", a, d, SekPcS68k);
\r
796 a = (a >> 1) & 0x1fff;
\r
797 Pico_mcd->bram[a++] = d;
\r
798 Pico_mcd->bram[a++] = d >> 8; // TODO: verify..
\r
802 #ifndef _ASM_CD_MEMORY_C
\r
804 // PCM and registers (ff0000 - ffffff)
\r
805 static u32 PicoReadS68k8_pr(u32 a)
\r
810 if ((a & 0xfe00) == 0x8000) {
\r
812 if (a >= 0x0e && a < 0x30) {
\r
813 d = Pico_mcd->s68k_regs[a];
\r
814 s68k_poll_detect(a & ~1, d);
\r
817 else if (a >= 0x58 && a < 0x68)
\r
818 d = gfx_cd_read(a & ~1);
\r
819 else d = s68k_reg_read16(a & ~1);
\r
825 elprintf(EL_CDREGS, "s68k_regs r8: [%02x] %02x @%06x",
\r
831 // XXX: verify: probably odd addrs only?
\r
832 if ((a & 0x8000) == 0x0000) {
\r
835 d = Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][(a >> 1) & 0xfff];
\r
836 else if (a >= 0x20)
\r
837 d = pcd_pcm_read(a >> 1);
\r
842 return s68k_unmapped_read8(a);
\r
845 static u32 PicoReadS68k16_pr(u32 a)
\r
850 if ((a & 0xfe00) == 0x8000) {
\r
852 if (0x58 <= a && a < 0x68)
\r
853 d = gfx_cd_read(a);
\r
854 else d = s68k_reg_read16(a);
\r
856 elprintf(EL_CDREGS, "s68k_regs r16: [%02x] %04x @%06x",
\r
862 if ((a & 0x8000) == 0x0000) {
\r
865 d = Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][(a >> 1) & 0xfff];
\r
866 else if (a >= 0x20)
\r
867 d = pcd_pcm_read(a >> 1);
\r
872 return s68k_unmapped_read16(a);
\r
875 static void PicoWriteS68k8_pr(u32 a, u32 d)
\r
878 if ((a & 0xfe00) == 0x8000) {
\r
880 elprintf(EL_CDREGS, "s68k_regs w8: [%02x] %02x @%06x", a, d, SekPcS68k);
\r
881 if (0x58 <= a && a < 0x68)
\r
882 gfx_cd_write16(a&~1, (d<<8)|d);
\r
883 else s68k_reg_write8(a,d);
\r
888 if ((a & 0x8000) == 0x0000) {
\r
891 Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][(a>>1)&0xfff] = d;
\r
893 pcd_pcm_write(a>>1, d);
\r
897 s68k_unmapped_write8(a, d);
\r
900 static void PicoWriteS68k16_pr(u32 a, u32 d)
\r
903 if ((a & 0xfe00) == 0x8000) {
\r
905 elprintf(EL_CDREGS, "s68k_regs w16: [%02x] %04x @%06x", a, d, SekPcS68k);
\r
906 if (a >= 0x58 && a < 0x68)
\r
907 gfx_cd_write16(a, d);
\r
910 // special case, 2 byte writes would be handled differently
\r
912 Pico_mcd->s68k_regs[0xf] = d;
\r
915 s68k_reg_write8(a, d >> 8);
\r
916 s68k_reg_write8(a + 1, d & 0xff);
\r
922 if ((a & 0x8000) == 0x0000) {
\r
925 Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][(a>>1)&0xfff] = d;
\r
927 pcd_pcm_write(a>>1, d & 0xff);
\r
931 s68k_unmapped_write16(a, d);
\r
936 static const void *m68k_cell_read8[] = { PicoReadM68k8_cell0, PicoReadM68k8_cell1 };
\r
937 static const void *m68k_cell_read16[] = { PicoReadM68k16_cell0, PicoReadM68k16_cell1 };
\r
938 static const void *m68k_cell_write8[] = { PicoWriteM68k8_cell0, PicoWriteM68k8_cell1 };
\r
939 static const void *m68k_cell_write16[] = { PicoWriteM68k16_cell0, PicoWriteM68k16_cell1 };
\r
941 static const void *s68k_dec_read8[] = { PicoReadS68k8_dec0, PicoReadS68k8_dec1 };
\r
942 static const void *s68k_dec_read16[] = { PicoReadS68k16_dec0, PicoReadS68k16_dec1 };
\r
944 static const void *s68k_dec_write8[2][4] = {
\r
945 { PicoWriteS68k8_dec_m0b0, PicoWriteS68k8_dec_m1b0, PicoWriteS68k8_dec_m2b0, PicoWriteS68k8_dec_m2b0 },
\r
946 { PicoWriteS68k8_dec_m0b1, PicoWriteS68k8_dec_m1b1, PicoWriteS68k8_dec_m2b1, PicoWriteS68k8_dec_m2b1 },
\r
949 static const void *s68k_dec_write16[2][4] = {
\r
950 { PicoWriteS68k16_dec_m0b0, PicoWriteS68k16_dec_m1b0, PicoWriteS68k16_dec_m2b0, PicoWriteS68k16_dec_m2b0 },
\r
951 { PicoWriteS68k16_dec_m0b1, PicoWriteS68k16_dec_m1b1, PicoWriteS68k16_dec_m2b1, PicoWriteS68k16_dec_m2b1 },
\r
954 // -----------------------------------------------------------------
\r
956 static void remap_prg_window(u32 r1, u32 r3)
\r
960 void *bank = Pico_mcd->prg_ram_b[(r3 >> 6) & 3];
\r
961 cpu68k_map_all_ram(0x020000, 0x03ffff, bank, 0);
\r
964 m68k_map_unmap(0x020000, 0x03ffff);
\r
968 static void remap_word_ram(u32 r3)
\r
974 // 2M mode. XXX: allowing access in all cases for simplicity
\r
975 bank = Pico_mcd->word_ram2M;
\r
976 cpu68k_map_all_ram(0x200000, 0x23ffff, bank, 0);
\r
977 cpu68k_map_all_ram(0x080000, 0x0bffff, bank, 1);
\r
978 // TODO: handle 0x0c0000
\r
982 int m = (r3 & 0x18) >> 3;
\r
983 bank = Pico_mcd->word_ram1M[b0];
\r
984 cpu68k_map_all_ram(0x200000, 0x21ffff, bank, 0);
\r
985 bank = Pico_mcd->word_ram1M[b0 ^ 1];
\r
986 cpu68k_map_all_ram(0x0c0000, 0x0effff, bank, 1);
\r
987 // "cell arrange" on m68k
\r
988 cpu68k_map_set(m68k_read8_map, 0x220000, 0x23ffff, m68k_cell_read8[b0], 1);
\r
989 cpu68k_map_set(m68k_read16_map, 0x220000, 0x23ffff, m68k_cell_read16[b0], 1);
\r
990 cpu68k_map_set(m68k_write8_map, 0x220000, 0x23ffff, m68k_cell_write8[b0], 1);
\r
991 cpu68k_map_set(m68k_write16_map, 0x220000, 0x23ffff, m68k_cell_write16[b0], 1);
\r
992 // "decode format" on s68k
\r
993 cpu68k_map_set(s68k_read8_map, 0x080000, 0x0bffff, s68k_dec_read8[b0 ^ 1], 1);
\r
994 cpu68k_map_set(s68k_read16_map, 0x080000, 0x0bffff, s68k_dec_read16[b0 ^ 1], 1);
\r
995 cpu68k_map_set(s68k_write8_map, 0x080000, 0x0bffff, s68k_dec_write8[b0 ^ 1][m], 1);
\r
996 cpu68k_map_set(s68k_write16_map, 0x080000, 0x0bffff, s68k_dec_write16[b0 ^ 1][m], 1);
\r
1000 // update fetchmap..
\r
1004 for (i = M68K_FETCHBANK1*2/16; (i<<(24-FAMEC_FETCHBITS)) < 0x240000; i++)
\r
1005 PicoCpuFM68k.Fetch[i] = (unsigned long)Pico_mcd->word_ram2M - 0x200000;
\r
1009 for (i = M68K_FETCHBANK1*2/16; (i<<(24-FAMEC_FETCHBITS)) < 0x220000; i++)
\r
1010 PicoCpuFM68k.Fetch[i] = (unsigned long)Pico_mcd->word_ram1M[r3 & 1] - 0x200000;
\r
1011 for (i = M68K_FETCHBANK1*0x0c/0x100; (i<<(24-FAMEC_FETCHBITS)) < 0x0e0000; i++)
\r
1012 PicoCpuFS68k.Fetch[i] = (unsigned long)Pico_mcd->word_ram1M[(r3&1)^1] - 0x0c0000;
\r
1017 void pcd_state_loaded_mem(void)
\r
1019 u32 r3 = Pico_mcd->s68k_regs[3];
\r
1021 /* after load events */
\r
1022 if (r3 & 4) // 1M mode?
\r
1023 wram_2M_to_1M(Pico_mcd->word_ram2M);
\r
1024 remap_word_ram(r3);
\r
1025 remap_prg_window(Pico_mcd->m.busreq, r3);
\r
1026 Pico_mcd->m.dmna_ret_2m &= 3;
\r
1028 // restore hint vector
\r
1029 *(unsigned short *)(Pico_mcd->bios + 0x72) = Pico_mcd->m.hint_vector;
\r
1033 static void m68k_mem_setup_cd(void);
\r
1036 PICO_INTERNAL void PicoMemSetupCD(void)
\r
1038 // setup default main68k map
\r
1041 // main68k map (BIOS mapped by PicoMemSetup()):
\r
1043 if (PicoOpt & POPT_EN_MCD_RAMCART) {
\r
1044 cpu68k_map_set(m68k_read8_map, 0x400000, 0x7fffff, PicoReadM68k8_ramc, 1);
\r
1045 cpu68k_map_set(m68k_read16_map, 0x400000, 0x7fffff, PicoReadM68k16_ramc, 1);
\r
1046 cpu68k_map_set(m68k_write8_map, 0x400000, 0x7fffff, PicoWriteM68k8_ramc, 1);
\r
1047 cpu68k_map_set(m68k_write16_map, 0x400000, 0x7fffff, PicoWriteM68k16_ramc, 1);
\r
1051 cpu68k_map_set(m68k_read8_map, 0xa10000, 0xa1ffff, PicoRead8_mcd_io, 1);
\r
1052 cpu68k_map_set(m68k_read16_map, 0xa10000, 0xa1ffff, PicoRead16_mcd_io, 1);
\r
1053 cpu68k_map_set(m68k_write8_map, 0xa10000, 0xa1ffff, PicoWrite8_mcd_io, 1);
\r
1054 cpu68k_map_set(m68k_write16_map, 0xa10000, 0xa1ffff, PicoWrite16_mcd_io, 1);
\r
1057 cpu68k_map_set(s68k_read8_map, 0x000000, 0xffffff, s68k_unmapped_read8, 1);
\r
1058 cpu68k_map_set(s68k_read16_map, 0x000000, 0xffffff, s68k_unmapped_read16, 1);
\r
1059 cpu68k_map_set(s68k_write8_map, 0x000000, 0xffffff, s68k_unmapped_write8, 1);
\r
1060 cpu68k_map_set(s68k_write16_map, 0x000000, 0xffffff, s68k_unmapped_write16, 1);
\r
1063 cpu68k_map_set(s68k_read8_map, 0x000000, 0x07ffff, Pico_mcd->prg_ram, 0);
\r
1064 cpu68k_map_set(s68k_read16_map, 0x000000, 0x07ffff, Pico_mcd->prg_ram, 0);
\r
1065 cpu68k_map_set(s68k_write8_map, 0x000000, 0x07ffff, Pico_mcd->prg_ram, 0);
\r
1066 cpu68k_map_set(s68k_write16_map, 0x000000, 0x07ffff, Pico_mcd->prg_ram, 0);
\r
1067 cpu68k_map_set(s68k_write8_map, 0x000000, 0x01ffff, PicoWriteS68k8_prgwp, 1);
\r
1068 cpu68k_map_set(s68k_write16_map, 0x000000, 0x01ffff, PicoWriteS68k16_prgwp, 1);
\r
1071 cpu68k_map_set(s68k_read8_map, 0xfe0000, 0xfeffff, PicoReadS68k8_bram, 1);
\r
1072 cpu68k_map_set(s68k_read16_map, 0xfe0000, 0xfeffff, PicoReadS68k16_bram, 1);
\r
1073 cpu68k_map_set(s68k_write8_map, 0xfe0000, 0xfeffff, PicoWriteS68k8_bram, 1);
\r
1074 cpu68k_map_set(s68k_write16_map, 0xfe0000, 0xfeffff, PicoWriteS68k16_bram, 1);
\r
1077 cpu68k_map_set(s68k_read8_map, 0xff0000, 0xffffff, PicoReadS68k8_pr, 1);
\r
1078 cpu68k_map_set(s68k_read16_map, 0xff0000, 0xffffff, PicoReadS68k16_pr, 1);
\r
1079 cpu68k_map_set(s68k_write8_map, 0xff0000, 0xffffff, PicoWriteS68k8_pr, 1);
\r
1080 cpu68k_map_set(s68k_write16_map, 0xff0000, 0xffffff, PicoWriteS68k16_pr, 1);
\r
1083 remap_word_ram(1);
\r
1087 PicoCpuCS68k.read8 = (void *)s68k_read8_map;
\r
1088 PicoCpuCS68k.read16 = (void *)s68k_read16_map;
\r
1089 PicoCpuCS68k.read32 = (void *)s68k_read16_map;
\r
1090 PicoCpuCS68k.write8 = (void *)s68k_write8_map;
\r
1091 PicoCpuCS68k.write16 = (void *)s68k_write16_map;
\r
1092 PicoCpuCS68k.write32 = (void *)s68k_write16_map;
\r
1093 PicoCpuCS68k.checkpc = NULL; /* unused */
\r
1094 PicoCpuCS68k.fetch8 = NULL;
\r
1095 PicoCpuCS68k.fetch16 = NULL;
\r
1096 PicoCpuCS68k.fetch32 = NULL;
\r
1100 PicoCpuFS68k.read_byte = s68k_read8;
\r
1101 PicoCpuFS68k.read_word = s68k_read16;
\r
1102 PicoCpuFS68k.read_long = s68k_read32;
\r
1103 PicoCpuFS68k.write_byte = s68k_write8;
\r
1104 PicoCpuFS68k.write_word = s68k_write16;
\r
1105 PicoCpuFS68k.write_long = s68k_write32;
\r
1107 // setup FAME fetchmap
\r
1111 // by default, point everything to fitst 64k of ROM (BIOS)
\r
1112 for (i = 0; i < M68K_FETCHBANK1; i++)
\r
1113 PicoCpuFM68k.Fetch[i] = (unsigned long)Pico.rom - (i<<(24-FAMEC_FETCHBITS));
\r
1114 // now real ROM (BIOS)
\r
1115 for (i = 0; i < M68K_FETCHBANK1 && (i<<(24-FAMEC_FETCHBITS)) < Pico.romsize; i++)
\r
1116 PicoCpuFM68k.Fetch[i] = (unsigned long)Pico.rom;
\r
1118 for (i = M68K_FETCHBANK1*14/16; i < M68K_FETCHBANK1; i++)
\r
1119 PicoCpuFM68k.Fetch[i] = (unsigned long)Pico.ram - (i<<(24-FAMEC_FETCHBITS));
\r
1121 // PRG RAM is default
\r
1122 for (i = 0; i < M68K_FETCHBANK1; i++)
\r
1123 PicoCpuFS68k.Fetch[i] = (unsigned long)Pico_mcd->prg_ram - (i<<(24-FAMEC_FETCHBITS));
\r
1125 for (i = 0; i < M68K_FETCHBANK1 && (i<<(24-FAMEC_FETCHBITS)) < 0x80000; i++)
\r
1126 PicoCpuFS68k.Fetch[i] = (unsigned long)Pico_mcd->prg_ram;
\r
1127 // WORD RAM 2M area
\r
1128 for (i = M68K_FETCHBANK1*0x08/0x100; i < M68K_FETCHBANK1 && (i<<(24-FAMEC_FETCHBITS)) < 0xc0000; i++)
\r
1129 PicoCpuFS68k.Fetch[i] = (unsigned long)Pico_mcd->word_ram2M - 0x80000;
\r
1130 // remap_word_ram() will setup word ram for both
\r
1134 m68k_mem_setup_cd();
\r
1140 u32 m68k_read8(u32 a);
\r
1141 u32 m68k_read16(u32 a);
\r
1142 u32 m68k_read32(u32 a);
\r
1143 void m68k_write8(u32 a, u8 d);
\r
1144 void m68k_write16(u32 a, u16 d);
\r
1145 void m68k_write32(u32 a, u32 d);
\r
1147 static unsigned int PicoReadCD8w (unsigned int a) {
\r
1148 return m68ki_cpu_p == &PicoCpuMS68k ? s68k_read8(a) : m68k_read8(a);
\r
1150 static unsigned int PicoReadCD16w(unsigned int a) {
\r
1151 return m68ki_cpu_p == &PicoCpuMS68k ? s68k_read16(a) : m68k_read16(a);
\r
1153 static unsigned int PicoReadCD32w(unsigned int a) {
\r
1154 return m68ki_cpu_p == &PicoCpuMS68k ? s68k_read32(a) : m68k_read32(a);
\r
1156 static void PicoWriteCD8w (unsigned int a, unsigned char d) {
\r
1157 if (m68ki_cpu_p == &PicoCpuMS68k) s68k_write8(a, d); else m68k_write8(a, d);
\r
1159 static void PicoWriteCD16w(unsigned int a, unsigned short d) {
\r
1160 if (m68ki_cpu_p == &PicoCpuMS68k) s68k_write16(a, d); else m68k_write16(a, d);
\r
1162 static void PicoWriteCD32w(unsigned int a, unsigned int d) {
\r
1163 if (m68ki_cpu_p == &PicoCpuMS68k) s68k_write32(a, d); else m68k_write32(a, d);
\r
1166 extern unsigned int (*pm68k_read_memory_8) (unsigned int address);
\r
1167 extern unsigned int (*pm68k_read_memory_16)(unsigned int address);
\r
1168 extern unsigned int (*pm68k_read_memory_32)(unsigned int address);
\r
1169 extern void (*pm68k_write_memory_8) (unsigned int address, unsigned char value);
\r
1170 extern void (*pm68k_write_memory_16)(unsigned int address, unsigned short value);
\r
1171 extern void (*pm68k_write_memory_32)(unsigned int address, unsigned int value);
\r
1173 static void m68k_mem_setup_cd(void)
\r
1175 pm68k_read_memory_8 = PicoReadCD8w;
\r
1176 pm68k_read_memory_16 = PicoReadCD16w;
\r
1177 pm68k_read_memory_32 = PicoReadCD32w;
\r
1178 pm68k_write_memory_8 = PicoWriteCD8w;
\r
1179 pm68k_write_memory_16 = PicoWriteCD16w;
\r
1180 pm68k_write_memory_32 = PicoWriteCD32w;
\r
1182 #endif // EMU_M68K
\r
1184 // vim:shiftwidth=2:ts=2:expandtab
\r