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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12 uptr s68k_read8_map [0x1000000 >> M68K_MEM_SHIFT];
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13 uptr s68k_read16_map [0x1000000 >> M68K_MEM_SHIFT];
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14 uptr s68k_write8_map [0x1000000 >> M68K_MEM_SHIFT];
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15 uptr s68k_write16_map[0x1000000 >> M68K_MEM_SHIFT];
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17 MAKE_68K_READ8(s68k_read8, s68k_read8_map)
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18 MAKE_68K_READ16(s68k_read16, s68k_read16_map)
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19 MAKE_68K_READ32(s68k_read32, s68k_read16_map)
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20 MAKE_68K_WRITE8(s68k_write8, s68k_write8_map)
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21 MAKE_68K_WRITE16(s68k_write16, s68k_write16_map)
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22 MAKE_68K_WRITE32(s68k_write32, s68k_write16_map)
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24 // -----------------------------------------------------------------
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26 // provided by ASM code:
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27 #ifdef _ASM_CD_MEMORY_C
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28 u32 PicoReadS68k8_pr(u32 a);
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29 u32 PicoReadS68k16_pr(u32 a);
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30 void PicoWriteS68k8_pr(u32 a, u32 d);
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31 void PicoWriteS68k16_pr(u32 a, u32 d);
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33 u32 PicoReadM68k8_cell0(u32 a);
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34 u32 PicoReadM68k8_cell1(u32 a);
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35 u32 PicoReadM68k16_cell0(u32 a);
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36 u32 PicoReadM68k16_cell1(u32 a);
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37 void PicoWriteM68k8_cell0(u32 a, u32 d);
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38 void PicoWriteM68k8_cell1(u32 a, u32 d);
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39 void PicoWriteM68k16_cell0(u32 a, u32 d);
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40 void PicoWriteM68k16_cell1(u32 a, u32 d);
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42 u32 PicoReadS68k8_dec0(u32 a);
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43 u32 PicoReadS68k8_dec1(u32 a);
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44 u32 PicoReadS68k16_dec0(u32 a);
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45 u32 PicoReadS68k16_dec1(u32 a);
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46 void PicoWriteS68k8_dec_m0b0(u32 a, u32 d);
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47 void PicoWriteS68k8_dec_m1b0(u32 a, u32 d);
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48 void PicoWriteS68k8_dec_m2b0(u32 a, u32 d);
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49 void PicoWriteS68k8_dec_m0b1(u32 a, u32 d);
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50 void PicoWriteS68k8_dec_m1b1(u32 a, u32 d);
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51 void PicoWriteS68k8_dec_m2b1(u32 a, u32 d);
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52 void PicoWriteS68k16_dec_m0b0(u32 a, u32 d);
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53 void PicoWriteS68k16_dec_m1b0(u32 a, u32 d);
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54 void PicoWriteS68k16_dec_m2b0(u32 a, u32 d);
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55 void PicoWriteS68k16_dec_m0b1(u32 a, u32 d);
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56 void PicoWriteS68k16_dec_m1b1(u32 a, u32 d);
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57 void PicoWriteS68k16_dec_m2b1(u32 a, u32 d);
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60 static void remap_prg_window(u32 r1, u32 r3);
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61 static void remap_word_ram(u32 r3);
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64 #define POLL_LIMIT 16
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65 #define POLL_CYCLES 64
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67 void m68k_comm_check(u32 a)
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69 pcd_sync_s68k(SekCyclesDone(), 0);
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70 if (a >= 0x0e && !Pico_mcd->m.need_sync) {
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71 // there are cases when slave updates comm and only switches RAM
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72 // over after that (mcd1b), so there must be a resync..
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74 Pico_mcd->m.need_sync = 1;
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76 if (SekNotPolling || a != Pico_mcd->m.m68k_poll_a) {
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77 Pico_mcd->m.m68k_poll_a = a;
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78 Pico_mcd->m.m68k_poll_cnt = 0;
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82 Pico_mcd->m.m68k_poll_cnt++;
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85 #ifndef _ASM_CD_MEMORY_C
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86 static u32 m68k_reg_read16(u32 a)
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93 // here IFL2 is always 0, just like in Gens
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94 d = ((Pico_mcd->s68k_regs[0x33] << 13) & 0x8000)
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95 | Pico_mcd->m.busreq;
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99 d = (Pico_mcd->s68k_regs[a]<<8) | (Pico_mcd->s68k_regs[a+1]&0xc7);
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100 elprintf(EL_CDREG3, "m68k_regs r3: %02x @%06x", (u8)d, SekPc);
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103 d = Pico_mcd->s68k_regs[4]<<8;
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106 d = *(u16 *)(Pico_mcd->bios + 0x72);
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112 elprintf(EL_UIO, "m68k FIXME: reserved read");
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114 case 0xC: // 384 cycle stopwatch timer
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116 d = pcd_cycles_m68k_to_s68k(SekCyclesDone());
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117 d = (d - Pico_mcd->m.stopwatch_base_c) / 384;
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119 elprintf(EL_CDREGS, "m68k stopwatch timer read (%04x)", d);
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124 // comm flag/cmd/status (0xE-0x2F)
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125 m68k_comm_check(a);
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126 d = (Pico_mcd->s68k_regs[a]<<8) | Pico_mcd->s68k_regs[a+1];
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130 elprintf(EL_UIO, "m68k_regs FIXME invalid read @ %02x", a);
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137 #ifndef _ASM_CD_MEMORY_C
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140 void m68k_reg_write8(u32 a, u32 d)
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148 if (d && (Pico_mcd->s68k_regs[0x33] & PCDS_IEN2)) {
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149 elprintf(EL_INTS, "m68k: s68k irq 2");
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150 pcd_sync_s68k(SekCyclesDone(), 0);
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151 SekInterruptS68k(2);
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156 dold = Pico_mcd->m.busreq;
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158 d |= 2; // verified: can't release bus on reset
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162 pcd_sync_s68k(SekCyclesDone(), 0);
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164 if ((dold ^ d) & 1)
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165 elprintf(EL_INTSW, "m68k: s68k reset %i", !(d&1));
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167 Pico_mcd->m.state_flags |= PCD_ST_S68K_RST;
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168 else if (d == 1 && (Pico_mcd->m.state_flags & PCD_ST_S68K_RST)) {
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169 Pico_mcd->m.state_flags &= ~PCD_ST_S68K_RST;
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170 elprintf(EL_CDREGS, "m68k: resetting s68k");
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173 if ((dold ^ d) & 2) {
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174 elprintf(EL_INTSW, "m68k: s68k brq %i", d >> 1);
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175 remap_prg_window(d, Pico_mcd->s68k_regs[3]);
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177 Pico_mcd->m.busreq = d;
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180 elprintf(EL_CDREGS, "m68k: prg wp=%02x", d);
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181 Pico_mcd->s68k_regs[2] = d; // really use s68k side register
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184 dold = Pico_mcd->s68k_regs[3];
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185 elprintf(EL_CDREG3, "m68k_regs w3: %02x @%06x", (u8)d, SekPc);
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186 if ((d ^ dold) & 0xc0) {
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187 elprintf(EL_CDREGS, "m68k: prg bank: %i -> %i",
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188 (Pico_mcd->s68k_regs[a]>>6), ((d>>6)&3));
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189 remap_prg_window(Pico_mcd->m.busreq, d);
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192 // 2M mode state is tracked regardless of current mode
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194 Pico_mcd->m.dmna_ret_2m |= 2;
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195 Pico_mcd->m.dmna_ret_2m &= ~1;
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197 if (dold & 4) { // 1M mode
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198 d ^= 2; // 0 sets DMNA, 1 does nothing
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199 d = (d & 0xc2) | (dold & 0x1f);
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202 d = (d & 0xc0) | (dold & 0x1c) | Pico_mcd->m.dmna_ret_2m;
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206 Pico_mcd->bios[0x72 + 1] = d; // simple hint vector changer
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209 Pico_mcd->bios[0x72] = d;
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210 elprintf(EL_CDREGS, "hint vector set to %04x%04x",
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211 ((u16 *)Pico_mcd->bios)[0x70/2], ((u16 *)Pico_mcd->bios)[0x72/2]);
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219 if ((a&0xf0) == 0x10)
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222 elprintf(EL_UIO, "m68k FIXME: invalid write? [%02x] %02x", a, d);
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226 if (d == Pico_mcd->s68k_regs[a])
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229 pcd_sync_s68k(SekCyclesDone(), 0);
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230 Pico_mcd->s68k_regs[a] = d;
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231 if (Pico_mcd->m.s68k_poll_a == (a & ~1))
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233 if (Pico_mcd->m.s68k_poll_cnt > POLL_LIMIT) {
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234 elprintf(EL_CDPOLL, "s68k poll release, a=%02x", a);
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237 Pico_mcd->m.s68k_poll_a = 0;
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241 u32 s68k_poll_detect(u32 a, u32 d)
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243 #ifdef USE_POLL_DETECT
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244 u32 cycles, cnt = 0;
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245 if (SekIsStoppedS68k())
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248 cycles = SekCyclesDoneS68k();
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249 if (!SekNotPolling && a == Pico_mcd->m.s68k_poll_a) {
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250 u32 clkdiff = cycles - Pico_mcd->m.s68k_poll_clk;
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251 if (clkdiff <= POLL_CYCLES) {
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252 cnt = Pico_mcd->m.s68k_poll_cnt + 1;
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253 //printf("-- diff: %u, cnt = %i\n", clkdiff, cnt);
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254 if (Pico_mcd->m.s68k_poll_cnt > POLL_LIMIT) {
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256 elprintf(EL_CDPOLL, "s68k poll detected @%06x, a=%02x",
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261 Pico_mcd->m.s68k_poll_a = a;
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262 Pico_mcd->m.s68k_poll_clk = cycles;
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263 Pico_mcd->m.s68k_poll_cnt = cnt;
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264 SekNotPollingS68k = 0;
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269 #define READ_FONT_DATA(basemask) \
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271 unsigned int fnt = *(unsigned int *)(Pico_mcd->s68k_regs + 0x4c); \
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272 unsigned int col0 = (fnt >> 8) & 0x0f, col1 = (fnt >> 12) & 0x0f; \
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273 if (fnt & (basemask << 0)) d = col1 ; else d = col0; \
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274 if (fnt & (basemask << 1)) d |= col1 << 4; else d |= col0 << 4; \
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275 if (fnt & (basemask << 2)) d |= col1 << 8; else d |= col0 << 8; \
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276 if (fnt & (basemask << 3)) d |= col1 << 12; else d |= col0 << 12; \
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280 #ifndef _ASM_CD_MEMORY_C
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283 u32 s68k_reg_read16(u32 a)
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289 return ((Pico_mcd->s68k_regs[0]&3)<<8) | 1; // ver = 0, not in reset state
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291 d = (Pico_mcd->s68k_regs[2]<<8) | (Pico_mcd->s68k_regs[3]&0x1f);
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292 elprintf(EL_CDREG3, "s68k_regs r3: %02x @%06x", (u8)d, SekPcS68k);
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293 return s68k_poll_detect(a, d);
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295 return cdc_reg_r();
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297 return cdc_host_r();
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299 d = SekCyclesDoneS68k() - Pico_mcd->m.stopwatch_base_c;
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302 elprintf(EL_CDREGS, "s68k stopwatch timer read (%04x)", d);
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305 elprintf(EL_CDREGS, "s68k int3 timer read (%02x)", Pico_mcd->s68k_regs[31]);
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306 return Pico_mcd->s68k_regs[31];
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307 case 0x34: // fader
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308 return 0; // no busy bit
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309 case 0x50: // font data (check: Lunar 2, Silpheed)
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310 READ_FONT_DATA(0x00100000);
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313 READ_FONT_DATA(0x00010000);
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316 READ_FONT_DATA(0x10000000);
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319 READ_FONT_DATA(0x01000000);
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323 d = (Pico_mcd->s68k_regs[a]<<8) | Pico_mcd->s68k_regs[a+1];
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325 if (a >= 0x0e && a < 0x30)
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326 return s68k_poll_detect(a, d);
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331 #ifndef _ASM_CD_MEMORY_C
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334 void s68k_reg_write8(u32 a, u32 d)
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336 // Warning: d might have upper bits set
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343 return; // only m68k can change WP
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345 int dold = Pico_mcd->s68k_regs[3];
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346 elprintf(EL_CDREG3, "s68k_regs w3: %02x @%06x", (u8)d, SekPcS68k);
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352 Pico_mcd->m.dmna_ret_2m |= 1;
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353 Pico_mcd->m.dmna_ret_2m &= ~2; // DMNA clears
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359 elprintf(EL_CDREG3, "wram mode 2M->1M");
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360 wram_2M_to_1M(Pico_mcd->word_ram2M);
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363 if ((d ^ dold) & 0x1d)
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366 if ((d ^ dold) & 0x05)
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367 d &= ~2; // clear DMNA - swap complete
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372 elprintf(EL_CDREG3, "wram mode 1M->2M");
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373 wram_1M_to_2M(Pico_mcd->word_ram2M);
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376 d = (d & ~3) | Pico_mcd->m.dmna_ret_2m;
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381 elprintf(EL_CDREGS, "s68k CDC dest: %x", d&7);
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382 Pico_mcd->s68k_regs[4] = (Pico_mcd->s68k_regs[4]&0xC0) | (d&7); // CDC mode
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385 //dprintf("s68k CDC reg addr: %x", d&0xf);
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388 cdc_reg_w(d & 0xff);
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391 elprintf(EL_CDREGS, "s68k set CDC dma addr");
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394 case 0xd: // 384 cycle stopwatch timer
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395 elprintf(EL_CDREGS|EL_CD, "s68k clear stopwatch (%x)", d);
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396 // does this also reset internal 384 cycle counter?
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397 Pico_mcd->m.stopwatch_base_c = SekCyclesDoneS68k();
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403 case 0x31: // 384 cycle int3 timer
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405 elprintf(EL_CDREGS|EL_CD, "s68k set int3 timer: %02x", d);
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406 Pico_mcd->s68k_regs[a] = (u8) d;
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407 if (d) // d or d+1??
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408 pcd_event_schedule_s68k(PCD_EVENT_TIMER3, d * 384);
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410 pcd_event_schedule(0, PCD_EVENT_TIMER3, 0);
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412 case 0x33: // IRQ mask
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413 elprintf(EL_CDREGS|EL_CD, "s68k irq mask: %02x", d);
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415 if ((d ^ Pico_mcd->s68k_regs[0x33]) & d & PCDS_IEN4) {
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416 // XXX: emulate pending irq instead?
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417 if (Pico_mcd->s68k_regs[0x37] & 4) {
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418 elprintf(EL_INTS, "cdd export irq 4 (unmask)");
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419 SekInterruptS68k(4);
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423 case 0x34: // fader
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424 Pico_mcd->s68k_regs[a] = (u8) d & 0x7f;
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427 return; // d/m bit is unsetable
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429 u32 d_old = Pico_mcd->s68k_regs[0x37];
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430 Pico_mcd->s68k_regs[0x37] = d & 7;
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431 if ((d&4) && !(d_old&4)) {
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433 pcd_event_schedule_s68k(PCD_EVENT_CDC, 12500000/75);
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435 if (Pico_mcd->s68k_regs[0x33] & PCDS_IEN4) {
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436 elprintf(EL_INTS, "cdd export irq 4");
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437 SekInterruptS68k(4);
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443 Pico_mcd->s68k_regs[a] = 0; // (u8) d; ?
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446 static const char *nm[] =
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447 { "stat", "stop", "read_toc", "play",
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448 "seek", "???", "pause", "resume",
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449 "ff", "fr", "tjump", "???",
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450 "close","open", "???", "???" };
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451 u8 *c = &Pico_mcd->s68k_regs[0x42];
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452 u8 *s = &Pico_mcd->s68k_regs[0x38];
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454 "CDD command: %02x %02x %02x %02x %02x %02x %02x %02x %12s",
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455 c[0], c[1], c[2], c[3], c[4], c[5], c[6], c[7], nm[c[0] & 0x0f]);
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457 "CDD status: %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x",
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458 s[0], s[1], s[2], s[3], s[4], s[5], s[6], s[7], s[8], s[9]);
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465 if ((a&0x1f0) == 0x20)
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468 if ((a&0x1f0) == 0x10 || (a >= 0x38 && a < 0x42))
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470 elprintf(EL_UIO, "s68k FIXME: invalid write @ %02x?", a);
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474 Pico_mcd->s68k_regs[a] = (u8) d;
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478 Pico_mcd->s68k_regs[a] = (u8) d;
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479 if (Pico_mcd->m.m68k_poll_cnt)
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481 Pico_mcd->m.m68k_poll_cnt = 0;
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484 void s68k_reg_write16(u32 a, u32 d)
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486 u8 *r = Pico_mcd->s68k_regs;
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488 if ((a & 0x1f0) == 0x20)
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493 // special case, 2 byte writes would be handled differently
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497 case 0x58: // stamp data size
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500 case 0x5a: // stamp map base address
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502 r[0x5b] = d & 0xe0;
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504 case 0x5c: // V cell size
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505 r[0x5d] = d & 0x1f;
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507 case 0x5e: // image buffer start address
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509 r[0x5f] = d & 0xf8;
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511 case 0x60: // image buffer offset
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512 r[0x61] = d & 0x3f;
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514 case 0x62: // h dot size
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515 r[0x62] = (d >> 8) & 1;
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518 case 0x64: // v dot size
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521 case 0x66: // trace vector base address
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531 s68k_reg_write8(a, d >> 8);
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532 s68k_reg_write8(a + 1, d & 0xff);
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538 if (Pico_mcd->m.m68k_poll_cnt)
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540 Pico_mcd->m.m68k_poll_cnt = 0;
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543 // -----------------------------------------------------------------
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545 // -----------------------------------------------------------------
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547 #ifndef _ASM_CD_MEMORY_C
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548 #include "cell_map.c"
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550 // WORD RAM, cell aranged area (220000 - 23ffff)
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551 static u32 PicoReadM68k8_cell0(u32 a)
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553 a = (a&3) | (cell_map(a >> 2) << 2); // cell arranged
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554 return Pico_mcd->word_ram1M[0][a ^ 1];
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557 static u32 PicoReadM68k8_cell1(u32 a)
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559 a = (a&3) | (cell_map(a >> 2) << 2);
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560 return Pico_mcd->word_ram1M[1][a ^ 1];
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563 static u32 PicoReadM68k16_cell0(u32 a)
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565 a = (a&2) | (cell_map(a >> 2) << 2);
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566 return *(u16 *)(Pico_mcd->word_ram1M[0] + a);
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569 static u32 PicoReadM68k16_cell1(u32 a)
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571 a = (a&2) | (cell_map(a >> 2) << 2);
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572 return *(u16 *)(Pico_mcd->word_ram1M[1] + a);
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575 static void PicoWriteM68k8_cell0(u32 a, u32 d)
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577 a = (a&3) | (cell_map(a >> 2) << 2);
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578 Pico_mcd->word_ram1M[0][a ^ 1] = d;
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581 static void PicoWriteM68k8_cell1(u32 a, u32 d)
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583 a = (a&3) | (cell_map(a >> 2) << 2);
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584 Pico_mcd->word_ram1M[1][a ^ 1] = d;
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587 static void PicoWriteM68k16_cell0(u32 a, u32 d)
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589 a = (a&3) | (cell_map(a >> 2) << 2);
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590 *(u16 *)(Pico_mcd->word_ram1M[0] + a) = d;
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593 static void PicoWriteM68k16_cell1(u32 a, u32 d)
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595 a = (a&3) | (cell_map(a >> 2) << 2);
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596 *(u16 *)(Pico_mcd->word_ram1M[1] + a) = d;
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600 // RAM cart (40000 - 7fffff, optional)
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601 static u32 PicoReadM68k8_ramc(u32 a)
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604 if (a == 0x400001) {
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605 if (Pico.sv.data != NULL)
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610 if ((a & 0xfe0000) == 0x600000) {
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611 if (Pico.sv.data != NULL)
\r
612 d = Pico.sv.data[((a >> 1) & 0xffff) + 0x2000];
\r
617 return Pico_mcd->m.bcram_reg;
\r
619 elprintf(EL_UIO, "m68k unmapped r8 [%06x] @%06x", a, SekPc);
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623 static u32 PicoReadM68k16_ramc(u32 a)
\r
625 elprintf(EL_ANOMALY, "ramcart r16: [%06x] @%06x", a, SekPcS68k);
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626 return PicoReadM68k8_ramc(a + 1);
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629 static void PicoWriteM68k8_ramc(u32 a, u32 d)
\r
631 if ((a & 0xfe0000) == 0x600000) {
\r
632 if (Pico.sv.data != NULL && (Pico_mcd->m.bcram_reg & 1)) {
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633 Pico.sv.data[((a>>1) & 0xffff) + 0x2000] = d;
\r
634 Pico.sv.changed = 1;
\r
639 if (a == 0x7fffff) {
\r
640 Pico_mcd->m.bcram_reg = d;
\r
644 elprintf(EL_UIO, "m68k unmapped w8 [%06x] %02x @%06x",
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645 a, d & 0xff, SekPc);
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648 static void PicoWriteM68k16_ramc(u32 a, u32 d)
\r
650 elprintf(EL_ANOMALY, "ramcart w16: [%06x] %04x @%06x",
\r
652 PicoWriteM68k8_ramc(a + 1, d);
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655 // IO/control/cd registers (a10000 - ...)
\r
656 #ifndef _ASM_CD_MEMORY_C
\r
657 u32 PicoRead8_mcd_io(u32 a)
\r
660 if ((a & 0xff00) == 0x2000) { // a12000 - a120ff
\r
661 d = m68k_reg_read16(a); // TODO: m68k_reg_read8
\r
665 elprintf(EL_CDREGS, "m68k_regs r8: [%02x] %02x @%06x",
\r
666 a & 0x3f, d, SekPc);
\r
670 // fallback to default MD handler
\r
671 return PicoRead8_io(a);
\r
674 u32 PicoRead16_mcd_io(u32 a)
\r
677 if ((a & 0xff00) == 0x2000) {
\r
678 d = m68k_reg_read16(a);
\r
679 elprintf(EL_CDREGS, "m68k_regs r16: [%02x] %04x @%06x",
\r
680 a & 0x3f, d, SekPc);
\r
684 return PicoRead16_io(a);
\r
687 void PicoWrite8_mcd_io(u32 a, u32 d)
\r
689 if ((a & 0xff00) == 0x2000) { // a12000 - a120ff
\r
690 elprintf(EL_CDREGS, "m68k_regs w8: [%02x] %02x @%06x",
\r
691 a & 0x3f, d, SekPc);
\r
692 m68k_reg_write8(a, d);
\r
696 PicoWrite8_io(a, d);
\r
699 void PicoWrite16_mcd_io(u32 a, u32 d)
\r
701 if ((a & 0xff00) == 0x2000) { // a12000 - a120ff
\r
702 elprintf(EL_CDREGS, "m68k_regs w16: [%02x] %04x @%06x",
\r
703 a & 0x3f, d, SekPc);
\r
705 m68k_reg_write8(a, d >> 8);
\r
706 if ((a & 0x3e) != 0x0e) // special case
\r
707 m68k_reg_write8(a + 1, d & 0xff);
\r
711 PicoWrite16_io(a, d);
\r
715 // -----------------------------------------------------------------
\r
717 // -----------------------------------------------------------------
\r
719 static u32 s68k_unmapped_read8(u32 a)
\r
721 elprintf(EL_UIO, "s68k unmapped r8 [%06x] @%06x", a, SekPc);
\r
725 static u32 s68k_unmapped_read16(u32 a)
\r
727 elprintf(EL_UIO, "s68k unmapped r16 [%06x] @%06x", a, SekPc);
\r
731 static void s68k_unmapped_write8(u32 a, u32 d)
\r
733 elprintf(EL_UIO, "s68k unmapped w8 [%06x] %02x @%06x",
\r
734 a, d & 0xff, SekPc);
\r
737 static void s68k_unmapped_write16(u32 a, u32 d)
\r
739 elprintf(EL_UIO, "s68k unmapped w16 [%06x] %04x @%06x",
\r
740 a, d & 0xffff, SekPc);
\r
743 // PRG RAM protected range (000000 - 01fdff)?
\r
744 // XXX verify: ff00 or 1fe00 max?
\r
745 static void PicoWriteS68k8_prgwp(u32 a, u32 d)
\r
747 if (a >= (Pico_mcd->s68k_regs[2] << 9))
\r
748 Pico_mcd->prg_ram[a ^ 1] = d;
\r
751 static void PicoWriteS68k16_prgwp(u32 a, u32 d)
\r
753 if (a >= (Pico_mcd->s68k_regs[2] << 9))
\r
754 *(u16 *)(Pico_mcd->prg_ram + a) = d;
\r
757 #ifndef _ASM_CD_MEMORY_C
\r
759 // decode (080000 - 0bffff, in 1M mode)
\r
760 static u32 PicoReadS68k8_dec0(u32 a)
\r
762 u32 d = Pico_mcd->word_ram1M[0][((a >> 1) ^ 1) & 0x1ffff];
\r
770 static u32 PicoReadS68k8_dec1(u32 a)
\r
772 u32 d = Pico_mcd->word_ram1M[1][((a >> 1) ^ 1) & 0x1ffff];
\r
780 static u32 PicoReadS68k16_dec0(u32 a)
\r
782 u32 d = Pico_mcd->word_ram1M[0][((a >> 1) ^ 1) & 0x1ffff];
\r
788 static u32 PicoReadS68k16_dec1(u32 a)
\r
790 u32 d = Pico_mcd->word_ram1M[1][((a >> 1) ^ 1) & 0x1ffff];
\r
796 /* check: jaguar xj 220 (draws entire world using decode) */
\r
797 #define mk_decode_w8(bank) \
\r
798 static void PicoWriteS68k8_dec_m0b##bank(u32 a, u32 d) \
\r
800 u8 *pd = &Pico_mcd->word_ram1M[bank][((a >> 1) ^ 1) & 0x1ffff]; \
\r
803 *pd = (*pd & 0x0f) | (d << 4); \
\r
805 *pd = (*pd & 0xf0) | (d & 0x0f); \
\r
808 static void PicoWriteS68k8_dec_m1b##bank(u32 a, u32 d) \
\r
810 u8 *pd = &Pico_mcd->word_ram1M[bank][((a >> 1) ^ 1) & 0x1ffff]; \
\r
811 u8 mask = (a & 1) ? 0x0f : 0xf0; \
\r
813 if (!(*pd & mask) && (d & 0x0f)) /* underwrite */ \
\r
814 PicoWriteS68k8_dec_m0b##bank(a, d); \
\r
817 static void PicoWriteS68k8_dec_m2b##bank(u32 a, u32 d) /* ...and m3? */ \
\r
819 if (d & 0x0f) /* overwrite */ \
\r
820 PicoWriteS68k8_dec_m0b##bank(a, d); \
\r
826 #define mk_decode_w16(bank) \
\r
827 static void PicoWriteS68k16_dec_m0b##bank(u32 a, u32 d) \
\r
829 u8 *pd = &Pico_mcd->word_ram1M[bank][((a >> 1) ^ 1) & 0x1ffff]; \
\r
832 *pd = d | (d >> 4); \
\r
835 static void PicoWriteS68k16_dec_m1b##bank(u32 a, u32 d) \
\r
837 u8 *pd = &Pico_mcd->word_ram1M[bank][((a >> 1) ^ 1) & 0x1ffff]; \
\r
839 d &= 0x0f0f; /* underwrite */ \
\r
840 if (!(*pd & 0xf0)) *pd |= d >> 4; \
\r
841 if (!(*pd & 0x0f)) *pd |= d; \
\r
844 static void PicoWriteS68k16_dec_m2b##bank(u32 a, u32 d) \
\r
846 u8 *pd = &Pico_mcd->word_ram1M[bank][((a >> 1) ^ 1) & 0x1ffff]; \
\r
848 d &= 0x0f0f; /* overwrite */ \
\r
851 if (!(d & 0xf0)) d |= *pd & 0xf0; \
\r
852 if (!(d & 0x0f)) d |= *pd & 0x0f; \
\r
861 // backup RAM (fe0000 - feffff)
\r
862 static u32 PicoReadS68k8_bram(u32 a)
\r
864 return Pico_mcd->bram[(a>>1)&0x1fff];
\r
867 static u32 PicoReadS68k16_bram(u32 a)
\r
870 elprintf(EL_ANOMALY, "FIXME: s68k_bram r16: [%06x] @%06x", a, SekPcS68k);
\r
871 a = (a >> 1) & 0x1fff;
\r
872 d = Pico_mcd->bram[a++];
\r
873 d|= Pico_mcd->bram[a++] << 8; // probably wrong, TODO: verify
\r
877 static void PicoWriteS68k8_bram(u32 a, u32 d)
\r
879 Pico_mcd->bram[(a >> 1) & 0x1fff] = d;
\r
880 Pico.sv.changed = 1;
\r
883 static void PicoWriteS68k16_bram(u32 a, u32 d)
\r
885 elprintf(EL_ANOMALY, "s68k_bram w16: [%06x] %04x @%06x", a, d, SekPcS68k);
\r
886 a = (a >> 1) & 0x1fff;
\r
887 Pico_mcd->bram[a++] = d;
\r
888 Pico_mcd->bram[a++] = d >> 8; // TODO: verify..
\r
889 Pico.sv.changed = 1;
\r
892 #ifndef _ASM_CD_MEMORY_C
\r
894 // PCM and registers (ff0000 - ffffff)
\r
895 static u32 PicoReadS68k8_pr(u32 a)
\r
900 if ((a & 0xfe00) == 0x8000) {
\r
902 if (a >= 0x0e && a < 0x30) {
\r
903 d = Pico_mcd->s68k_regs[a];
\r
904 s68k_poll_detect(a & ~1, d);
\r
907 d = s68k_reg_read16(a & ~1);
\r
913 elprintf(EL_CDREGS, "s68k_regs r8: [%02x] %02x @%06x",
\r
919 // XXX: verify: probably odd addrs only?
\r
920 if ((a & 0x8000) == 0x0000) {
\r
923 d = Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][(a >> 1) & 0xfff];
\r
924 else if (a >= 0x20)
\r
925 d = pcd_pcm_read(a >> 1);
\r
930 return s68k_unmapped_read8(a);
\r
933 static u32 PicoReadS68k16_pr(u32 a)
\r
938 if ((a & 0xfe00) == 0x8000) {
\r
940 d = s68k_reg_read16(a);
\r
942 elprintf(EL_CDREGS, "s68k_regs r16: [%02x] %04x @%06x",
\r
948 if ((a & 0x8000) == 0x0000) {
\r
951 d = Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][(a >> 1) & 0xfff];
\r
952 else if (a >= 0x20)
\r
953 d = pcd_pcm_read(a >> 1);
\r
958 return s68k_unmapped_read16(a);
\r
961 static void PicoWriteS68k8_pr(u32 a, u32 d)
\r
964 if ((a & 0xfe00) == 0x8000) {
\r
966 elprintf(EL_CDREGS, "s68k_regs w8: [%02x] %02x @%06x", a, d, SekPcS68k);
\r
967 if (0x59 <= a && a < 0x68) // word regs
\r
968 s68k_reg_write16(a & ~1, (d << 8) | d);
\r
970 s68k_reg_write8(a, d);
\r
975 if ((a & 0x8000) == 0x0000) {
\r
978 Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][(a>>1)&0xfff] = d;
\r
980 pcd_pcm_write(a>>1, d);
\r
984 s68k_unmapped_write8(a, d);
\r
987 static void PicoWriteS68k16_pr(u32 a, u32 d)
\r
990 if ((a & 0xfe00) == 0x8000) {
\r
992 elprintf(EL_CDREGS, "s68k_regs w16: [%02x] %04x @%06x", a, d, SekPcS68k);
\r
993 s68k_reg_write16(a, d);
\r
998 if ((a & 0x8000) == 0x0000) {
\r
1001 Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][(a>>1)&0xfff] = d;
\r
1002 else if (a < 0x12)
\r
1003 pcd_pcm_write(a>>1, d & 0xff);
\r
1007 s68k_unmapped_write16(a, d);
\r
1012 static const void *m68k_cell_read8[] = { PicoReadM68k8_cell0, PicoReadM68k8_cell1 };
\r
1013 static const void *m68k_cell_read16[] = { PicoReadM68k16_cell0, PicoReadM68k16_cell1 };
\r
1014 static const void *m68k_cell_write8[] = { PicoWriteM68k8_cell0, PicoWriteM68k8_cell1 };
\r
1015 static const void *m68k_cell_write16[] = { PicoWriteM68k16_cell0, PicoWriteM68k16_cell1 };
\r
1017 static const void *s68k_dec_read8[] = { PicoReadS68k8_dec0, PicoReadS68k8_dec1 };
\r
1018 static const void *s68k_dec_read16[] = { PicoReadS68k16_dec0, PicoReadS68k16_dec1 };
\r
1020 static const void *s68k_dec_write8[2][4] = {
\r
1021 { PicoWriteS68k8_dec_m0b0, PicoWriteS68k8_dec_m1b0, PicoWriteS68k8_dec_m2b0, PicoWriteS68k8_dec_m2b0 },
\r
1022 { PicoWriteS68k8_dec_m0b1, PicoWriteS68k8_dec_m1b1, PicoWriteS68k8_dec_m2b1, PicoWriteS68k8_dec_m2b1 },
\r
1025 static const void *s68k_dec_write16[2][4] = {
\r
1026 { PicoWriteS68k16_dec_m0b0, PicoWriteS68k16_dec_m1b0, PicoWriteS68k16_dec_m2b0, PicoWriteS68k16_dec_m2b0 },
\r
1027 { PicoWriteS68k16_dec_m0b1, PicoWriteS68k16_dec_m1b1, PicoWriteS68k16_dec_m2b1, PicoWriteS68k16_dec_m2b1 },
\r
1030 // -----------------------------------------------------------------
\r
1032 static void remap_prg_window(u32 r1, u32 r3)
\r
1036 void *bank = Pico_mcd->prg_ram_b[(r3 >> 6) & 3];
\r
1037 cpu68k_map_all_ram(0x020000, 0x03ffff, bank, 0);
\r
1040 m68k_map_unmap(0x020000, 0x03ffff);
\r
1044 static void remap_word_ram(u32 r3)
\r
1050 // 2M mode. XXX: allowing access in all cases for simplicity
\r
1051 bank = Pico_mcd->word_ram2M;
\r
1052 cpu68k_map_all_ram(0x200000, 0x23ffff, bank, 0);
\r
1053 cpu68k_map_all_ram(0x080000, 0x0bffff, bank, 1);
\r
1054 // TODO: handle 0x0c0000
\r
1058 int m = (r3 & 0x18) >> 3;
\r
1059 bank = Pico_mcd->word_ram1M[b0];
\r
1060 cpu68k_map_all_ram(0x200000, 0x21ffff, bank, 0);
\r
1061 bank = Pico_mcd->word_ram1M[b0 ^ 1];
\r
1062 cpu68k_map_all_ram(0x0c0000, 0x0effff, bank, 1);
\r
1063 // "cell arrange" on m68k
\r
1064 cpu68k_map_set(m68k_read8_map, 0x220000, 0x23ffff, m68k_cell_read8[b0], 1);
\r
1065 cpu68k_map_set(m68k_read16_map, 0x220000, 0x23ffff, m68k_cell_read16[b0], 1);
\r
1066 cpu68k_map_set(m68k_write8_map, 0x220000, 0x23ffff, m68k_cell_write8[b0], 1);
\r
1067 cpu68k_map_set(m68k_write16_map, 0x220000, 0x23ffff, m68k_cell_write16[b0], 1);
\r
1068 // "decode format" on s68k
\r
1069 cpu68k_map_set(s68k_read8_map, 0x080000, 0x0bffff, s68k_dec_read8[b0 ^ 1], 1);
\r
1070 cpu68k_map_set(s68k_read16_map, 0x080000, 0x0bffff, s68k_dec_read16[b0 ^ 1], 1);
\r
1071 cpu68k_map_set(s68k_write8_map, 0x080000, 0x0bffff, s68k_dec_write8[b0 ^ 1][m], 1);
\r
1072 cpu68k_map_set(s68k_write16_map, 0x080000, 0x0bffff, s68k_dec_write16[b0 ^ 1][m], 1);
\r
1076 void pcd_state_loaded_mem(void)
\r
1078 u32 r3 = Pico_mcd->s68k_regs[3];
\r
1080 /* after load events */
\r
1081 if (r3 & 4) // 1M mode?
\r
1082 wram_2M_to_1M(Pico_mcd->word_ram2M);
\r
1083 remap_word_ram(r3);
\r
1084 remap_prg_window(Pico_mcd->m.busreq, r3);
\r
1085 Pico_mcd->m.dmna_ret_2m &= 3;
\r
1087 // restore hint vector
\r
1088 *(unsigned short *)(Pico_mcd->bios + 0x72) = Pico_mcd->m.hint_vector;
\r
1092 static void m68k_mem_setup_cd(void);
\r
1095 PICO_INTERNAL void PicoMemSetupCD(void)
\r
1097 // setup default main68k map
\r
1100 // main68k map (BIOS mapped by PicoMemSetup()):
\r
1102 if (PicoIn.opt & POPT_EN_MCD_RAMCART) {
\r
1103 cpu68k_map_set(m68k_read8_map, 0x400000, 0x7fffff, PicoReadM68k8_ramc, 1);
\r
1104 cpu68k_map_set(m68k_read16_map, 0x400000, 0x7fffff, PicoReadM68k16_ramc, 1);
\r
1105 cpu68k_map_set(m68k_write8_map, 0x400000, 0x7fffff, PicoWriteM68k8_ramc, 1);
\r
1106 cpu68k_map_set(m68k_write16_map, 0x400000, 0x7fffff, PicoWriteM68k16_ramc, 1);
\r
1110 cpu68k_map_set(m68k_read8_map, 0xa10000, 0xa1ffff, PicoRead8_mcd_io, 1);
\r
1111 cpu68k_map_set(m68k_read16_map, 0xa10000, 0xa1ffff, PicoRead16_mcd_io, 1);
\r
1112 cpu68k_map_set(m68k_write8_map, 0xa10000, 0xa1ffff, PicoWrite8_mcd_io, 1);
\r
1113 cpu68k_map_set(m68k_write16_map, 0xa10000, 0xa1ffff, PicoWrite16_mcd_io, 1);
\r
1116 cpu68k_map_set(s68k_read8_map, 0x000000, 0xffffff, s68k_unmapped_read8, 1);
\r
1117 cpu68k_map_set(s68k_read16_map, 0x000000, 0xffffff, s68k_unmapped_read16, 1);
\r
1118 cpu68k_map_set(s68k_write8_map, 0x000000, 0xffffff, s68k_unmapped_write8, 1);
\r
1119 cpu68k_map_set(s68k_write16_map, 0x000000, 0xffffff, s68k_unmapped_write16, 1);
\r
1122 cpu68k_map_set(s68k_read8_map, 0x000000, 0x07ffff, Pico_mcd->prg_ram, 0);
\r
1123 cpu68k_map_set(s68k_read16_map, 0x000000, 0x07ffff, Pico_mcd->prg_ram, 0);
\r
1124 cpu68k_map_set(s68k_write8_map, 0x000000, 0x07ffff, Pico_mcd->prg_ram, 0);
\r
1125 cpu68k_map_set(s68k_write16_map, 0x000000, 0x07ffff, Pico_mcd->prg_ram, 0);
\r
1126 cpu68k_map_set(s68k_write8_map, 0x000000, 0x01ffff, PicoWriteS68k8_prgwp, 1);
\r
1127 cpu68k_map_set(s68k_write16_map, 0x000000, 0x01ffff, PicoWriteS68k16_prgwp, 1);
\r
1130 cpu68k_map_set(s68k_read8_map, 0xfe0000, 0xfeffff, PicoReadS68k8_bram, 1);
\r
1131 cpu68k_map_set(s68k_read16_map, 0xfe0000, 0xfeffff, PicoReadS68k16_bram, 1);
\r
1132 cpu68k_map_set(s68k_write8_map, 0xfe0000, 0xfeffff, PicoWriteS68k8_bram, 1);
\r
1133 cpu68k_map_set(s68k_write16_map, 0xfe0000, 0xfeffff, PicoWriteS68k16_bram, 1);
\r
1136 cpu68k_map_set(s68k_read8_map, 0xff0000, 0xffffff, PicoReadS68k8_pr, 1);
\r
1137 cpu68k_map_set(s68k_read16_map, 0xff0000, 0xffffff, PicoReadS68k16_pr, 1);
\r
1138 cpu68k_map_set(s68k_write8_map, 0xff0000, 0xffffff, PicoWriteS68k8_pr, 1);
\r
1139 cpu68k_map_set(s68k_write16_map, 0xff0000, 0xffffff, PicoWriteS68k16_pr, 1);
\r
1142 remap_word_ram(1);
\r
1146 PicoCpuCS68k.read8 = (void *)s68k_read8_map;
\r
1147 PicoCpuCS68k.read16 = (void *)s68k_read16_map;
\r
1148 PicoCpuCS68k.read32 = (void *)s68k_read16_map;
\r
1149 PicoCpuCS68k.write8 = (void *)s68k_write8_map;
\r
1150 PicoCpuCS68k.write16 = (void *)s68k_write16_map;
\r
1151 PicoCpuCS68k.write32 = (void *)s68k_write16_map;
\r
1152 PicoCpuCS68k.checkpc = NULL; /* unused */
\r
1153 PicoCpuCS68k.fetch8 = NULL;
\r
1154 PicoCpuCS68k.fetch16 = NULL;
\r
1155 PicoCpuCS68k.fetch32 = NULL;
\r
1159 PicoCpuFS68k.read_byte = s68k_read8;
\r
1160 PicoCpuFS68k.read_word = s68k_read16;
\r
1161 PicoCpuFS68k.read_long = s68k_read32;
\r
1162 PicoCpuFS68k.write_byte = s68k_write8;
\r
1163 PicoCpuFS68k.write_word = s68k_write16;
\r
1164 PicoCpuFS68k.write_long = s68k_write32;
\r
1166 // setup FAME fetchmap
\r
1169 volatile // prevent strange relocs from clang
\r
1171 unsigned long ptr_ram = (unsigned long)PicoMem.ram;
\r
1175 // by default, point everything to fitst 64k of ROM (BIOS)
\r
1176 for (i = 0; i < M68K_FETCHBANK1; i++)
\r
1177 PicoCpuFM68k.Fetch[i] = (unsigned long)Pico.rom - (i<<(24-FAMEC_FETCHBITS));
\r
1178 // now real ROM (BIOS)
\r
1179 for (i = 0; i < M68K_FETCHBANK1 && (i<<(24-FAMEC_FETCHBITS)) < Pico.romsize; i++)
\r
1180 PicoCpuFM68k.Fetch[i] = (unsigned long)Pico.rom;
\r
1182 for (i = M68K_FETCHBANK1*14/16; i < M68K_FETCHBANK1; i++)
\r
1183 PicoCpuFM68k.Fetch[i] = ptr_ram - (i<<(24-FAMEC_FETCHBITS));
\r
1185 // PRG RAM is default
\r
1186 for (i = 0; i < M68K_FETCHBANK1; i++)
\r
1187 PicoCpuFS68k.Fetch[i] = (unsigned long)Pico_mcd->prg_ram - (i<<(24-FAMEC_FETCHBITS));
\r
1189 for (i = 0; i < M68K_FETCHBANK1 && (i<<(24-FAMEC_FETCHBITS)) < 0x80000; i++)
\r
1190 PicoCpuFS68k.Fetch[i] = (unsigned long)Pico_mcd->prg_ram;
\r
1191 // WORD RAM 2M area
\r
1192 for (i = M68K_FETCHBANK1*0x08/0x100; i < M68K_FETCHBANK1 && (i<<(24-FAMEC_FETCHBITS)) < 0xc0000; i++)
\r
1193 PicoCpuFS68k.Fetch[i] = (unsigned long)Pico_mcd->word_ram2M - 0x80000;
\r
1194 // remap_word_ram() will setup word ram for both
\r
1198 m68k_mem_setup_cd();
\r
1204 u32 m68k_read8(u32 a);
\r
1205 u32 m68k_read16(u32 a);
\r
1206 u32 m68k_read32(u32 a);
\r
1207 void m68k_write8(u32 a, u8 d);
\r
1208 void m68k_write16(u32 a, u16 d);
\r
1209 void m68k_write32(u32 a, u32 d);
\r
1211 static unsigned int PicoReadCD8w (unsigned int a) {
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1212 return m68ki_cpu_p == &PicoCpuMS68k ? s68k_read8(a) : m68k_read8(a);
\r
1214 static unsigned int PicoReadCD16w(unsigned int a) {
\r
1215 return m68ki_cpu_p == &PicoCpuMS68k ? s68k_read16(a) : m68k_read16(a);
\r
1217 static unsigned int PicoReadCD32w(unsigned int a) {
\r
1218 return m68ki_cpu_p == &PicoCpuMS68k ? s68k_read32(a) : m68k_read32(a);
\r
1220 static void PicoWriteCD8w (unsigned int a, unsigned char d) {
\r
1221 if (m68ki_cpu_p == &PicoCpuMS68k) s68k_write8(a, d); else m68k_write8(a, d);
\r
1223 static void PicoWriteCD16w(unsigned int a, unsigned short d) {
\r
1224 if (m68ki_cpu_p == &PicoCpuMS68k) s68k_write16(a, d); else m68k_write16(a, d);
\r
1226 static void PicoWriteCD32w(unsigned int a, unsigned int d) {
\r
1227 if (m68ki_cpu_p == &PicoCpuMS68k) s68k_write32(a, d); else m68k_write32(a, d);
\r
1230 extern unsigned int (*pm68k_read_memory_8) (unsigned int address);
\r
1231 extern unsigned int (*pm68k_read_memory_16)(unsigned int address);
\r
1232 extern unsigned int (*pm68k_read_memory_32)(unsigned int address);
\r
1233 extern void (*pm68k_write_memory_8) (unsigned int address, unsigned char value);
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1234 extern void (*pm68k_write_memory_16)(unsigned int address, unsigned short value);
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1235 extern void (*pm68k_write_memory_32)(unsigned int address, unsigned int value);
\r
1237 static void m68k_mem_setup_cd(void)
\r
1239 pm68k_read_memory_8 = PicoReadCD8w;
\r
1240 pm68k_read_memory_16 = PicoReadCD16w;
\r
1241 pm68k_read_memory_32 = PicoReadCD32w;
\r
1242 pm68k_write_memory_8 = PicoWriteCD8w;
\r
1243 pm68k_write_memory_16 = PicoWriteCD16w;
\r
1244 pm68k_write_memory_32 = PicoWriteCD32w;
\r
1246 #endif // EMU_M68K
\r
1248 // vim:shiftwidth=2:ts=2:expandtab
\r