6cadc2da |
1 | // Memory I/O handlers for Sega/Mega CD.\r |
af37bca8 |
2 | // (c) Copyright 2007-2009, Grazvydas "notaz" Ignotas\r |
cc68a136 |
3 | \r |
efcba75f |
4 | #include "../pico_int.h"\r |
af37bca8 |
5 | #include "../memory.h"\r |
cc68a136 |
6 | \r |
cb4a513a |
7 | #include "gfx_cd.h"\r |
4f265db7 |
8 | #include "pcm.h"\r |
cb4a513a |
9 | \r |
af37bca8 |
10 | unsigned long s68k_read8_map [0x1000000 >> M68K_MEM_SHIFT];\r |
11 | unsigned long s68k_read16_map [0x1000000 >> M68K_MEM_SHIFT];\r |
12 | unsigned long s68k_write8_map [0x1000000 >> M68K_MEM_SHIFT];\r |
13 | unsigned long s68k_write16_map[0x1000000 >> M68K_MEM_SHIFT];\r |
cc68a136 |
14 | \r |
af37bca8 |
15 | MAKE_68K_READ8(s68k_read8, s68k_read8_map)\r |
16 | MAKE_68K_READ16(s68k_read16, s68k_read16_map)\r |
17 | MAKE_68K_READ32(s68k_read32, s68k_read16_map)\r |
18 | MAKE_68K_WRITE8(s68k_write8, s68k_write8_map)\r |
19 | MAKE_68K_WRITE16(s68k_write16, s68k_write16_map)\r |
20 | MAKE_68K_WRITE32(s68k_write32, s68k_write16_map)\r |
b5e5172d |
21 | \r |
cc68a136 |
22 | // -----------------------------------------------------------------\r |
23 | \r |
7a1f6e45 |
24 | // poller detection\r |
7a1f6e45 |
25 | #define POLL_LIMIT 16\r |
26 | #define POLL_CYCLES 124\r |
7a1f6e45 |
27 | unsigned int s68k_poll_adclk, s68k_poll_cnt;\r |
cc68a136 |
28 | \r |
4ff2d527 |
29 | #ifndef _ASM_CD_MEMORY_C\r |
cb4a513a |
30 | static u32 m68k_reg_read16(u32 a)\r |
cc68a136 |
31 | {\r |
32 | u32 d=0;\r |
33 | a &= 0x3e;\r |
cc68a136 |
34 | \r |
35 | switch (a) {\r |
672ad671 |
36 | case 0:\r |
c459aefd |
37 | d = ((Pico_mcd->s68k_regs[0x33]<<13)&0x8000) | Pico_mcd->m.busreq; // here IFL2 is always 0, just like in Gens\r |
672ad671 |
38 | goto end;\r |
cc68a136 |
39 | case 2:\r |
672ad671 |
40 | d = (Pico_mcd->s68k_regs[a]<<8) | (Pico_mcd->s68k_regs[a+1]&0xc7);\r |
af37bca8 |
41 | elprintf(EL_CDREG3, "m68k_regs r3: %02x @%06x", (u8)d, SekPc);\r |
cc68a136 |
42 | goto end;\r |
c459aefd |
43 | case 4:\r |
44 | d = Pico_mcd->s68k_regs[4]<<8;\r |
45 | goto end;\r |
46 | case 6:\r |
913ef4b7 |
47 | d = *(u16 *)(Pico_mcd->bios + 0x72);\r |
c459aefd |
48 | goto end;\r |
cc68a136 |
49 | case 8:\r |
cc68a136 |
50 | d = Read_CDC_Host(0);\r |
51 | goto end;\r |
c459aefd |
52 | case 0xA:\r |
ca61ee42 |
53 | elprintf(EL_UIO, "m68k FIXME: reserved read");\r |
c459aefd |
54 | goto end;\r |
cc68a136 |
55 | case 0xC:\r |
1cd356a3 |
56 | d = Pico_mcd->m.timer_stopwatch >> 16;\r |
af37bca8 |
57 | elprintf(EL_CDREGS, "m68k stopwatch timer read (%04x)", d);\r |
1cd356a3 |
58 | goto end;\r |
cc68a136 |
59 | }\r |
60 | \r |
cc68a136 |
61 | if (a < 0x30) {\r |
62 | // comm flag/cmd/status (0xE-0x2F)\r |
63 | d = (Pico_mcd->s68k_regs[a]<<8) | Pico_mcd->s68k_regs[a+1];\r |
64 | goto end;\r |
65 | }\r |
66 | \r |
ca61ee42 |
67 | elprintf(EL_UIO, "m68k_regs FIXME invalid read @ %02x", a);\r |
cc68a136 |
68 | \r |
69 | end:\r |
70 | \r |
cc68a136 |
71 | return d;\r |
72 | }\r |
4ff2d527 |
73 | #endif\r |
cc68a136 |
74 | \r |
4ff2d527 |
75 | #ifndef _ASM_CD_MEMORY_C\r |
76 | static\r |
77 | #endif\r |
78 | void m68k_reg_write8(u32 a, u32 d)\r |
cc68a136 |
79 | {\r |
af37bca8 |
80 | u32 dold;\r |
cc68a136 |
81 | a &= 0x3f;\r |
cc68a136 |
82 | \r |
83 | switch (a) {\r |
84 | case 0:\r |
672ad671 |
85 | d &= 1;\r |
ca61ee42 |
86 | if ((d&1) && (Pico_mcd->s68k_regs[0x33]&(1<<2))) { elprintf(EL_INTS, "m68k: s68k irq 2"); SekInterruptS68k(2); }\r |
c459aefd |
87 | return;\r |
cc68a136 |
88 | case 1:\r |
672ad671 |
89 | d &= 3;\r |
51a902ae |
90 | if (!(d&1)) Pico_mcd->m.state_flags |= 1; // reset pending, needed to be sure we fetch the right vectors on reset\r |
ef090115 |
91 | if ( (Pico_mcd->m.busreq&1) != (d&1)) elprintf(EL_INTSW, "m68k: s68k reset %i", !(d&1));\r |
92 | if ( (Pico_mcd->m.busreq&2) != (d&2)) elprintf(EL_INTSW, "m68k: s68k brq %i", (d&2)>>1);\r |
51a902ae |
93 | if ((Pico_mcd->m.state_flags&1) && (d&3)==1) {\r |
cc68a136 |
94 | SekResetS68k(); // S68k comes out of RESET or BRQ state\r |
4ff2d527 |
95 | Pico_mcd->m.state_flags&=~1;\r |
af37bca8 |
96 | elprintf(EL_CDREGS, "m68k: resetting s68k, cycles=%i", SekCyclesLeft);\r |
cc68a136 |
97 | }\r |
af37bca8 |
98 | if (!(d & 1))\r |
99 | d |= 2; // verified: reset also gives bus\r |
100 | if ((d ^ Pico_mcd->m.busreq) & 2)\r |
101 | PicoMemRemapCD(Pico_mcd->s68k_regs[3]);\r |
c459aefd |
102 | Pico_mcd->m.busreq = d;\r |
103 | return;\r |
672ad671 |
104 | case 2:\r |
af37bca8 |
105 | elprintf(EL_CDREGS, "m68k: prg wp=%02x", d);\r |
672ad671 |
106 | Pico_mcd->s68k_regs[2] = d; // really use s68k side register\r |
107 | return;\r |
af37bca8 |
108 | case 3:\r |
109 | dold = Pico_mcd->s68k_regs[3];\r |
110 | elprintf(EL_CDREG3, "m68k_regs w3: %02x @%06x", (u8)d, SekPc);\r |
672ad671 |
111 | //if ((Pico_mcd->s68k_regs[3]&4) != (d&4)) dprintf("m68k: ram mode %i mbit", (d&4) ? 1 : 2);\r |
112 | //if ((Pico_mcd->s68k_regs[3]&2) != (d&2)) dprintf("m68k: %s", (d&4) ? ((d&2) ? "word swap req" : "noop?") :\r |
113 | // ((d&2) ? "word ram to s68k" : "word ram to m68k"));\r |
ef090115 |
114 | if (dold & 4) { // 1M mode\r |
115 | d ^= 2; // writing 0 to DMNA actually sets it, 1 does nothing\r |
66fdc0f0 |
116 | } else {\r |
ef090115 |
117 | if ((d ^ dold) & d & 2) { // DMNA is being set\r |
118 | dold &= ~1; // return word RAM to s68k\r |
119 | /* Silpheed hack: bset(w3), r3, btst, bne, r3 */\r |
120 | SekEndRun(20+16+10+12+16);\r |
121 | }\r |
66fdc0f0 |
122 | }\r |
af37bca8 |
123 | Pico_mcd->s68k_regs[3] = (d & 0xc2) | (dold & 0x1f);\r |
124 | if ((d ^ dold) & 0xc0) {\r |
125 | elprintf(EL_CDREGS, "m68k: prg bank: %i -> %i", (Pico_mcd->s68k_regs[a]>>6), ((d>>6)&3));\r |
126 | PicoMemRemapCD(Pico_mcd->s68k_regs[3]);\r |
127 | }\r |
7a1f6e45 |
128 | #ifdef USE_POLL_DETECT\r |
129 | if ((s68k_poll_adclk&0xfe) == 2 && s68k_poll_cnt > POLL_LIMIT) {\r |
130 | SekSetStopS68k(0); s68k_poll_adclk = 0;\r |
8f8fe01e |
131 | elprintf(EL_CDPOLL, "s68k poll release, a=%02x", a);\r |
7a1f6e45 |
132 | }\r |
133 | #endif\r |
672ad671 |
134 | return;\r |
c459aefd |
135 | case 6:\r |
d1df8786 |
136 | Pico_mcd->bios[0x72 + 1] = d; // simple hint vector changer\r |
c459aefd |
137 | return;\r |
138 | case 7:\r |
d1df8786 |
139 | Pico_mcd->bios[0x72] = d;\r |
af37bca8 |
140 | elprintf(EL_CDREGS, "hint vector set to %04x%04x",\r |
141 | ((u16 *)Pico_mcd->bios)[0x70/2], ((u16 *)Pico_mcd->bios)[0x72/2]);\r |
c459aefd |
142 | return;\r |
7a1f6e45 |
143 | case 0xf:\r |
144 | d = (d << 1) | ((d >> 7) & 1); // rol8 1 (special case)\r |
cc68a136 |
145 | case 0xe:\r |
672ad671 |
146 | //dprintf("m68k: comm flag: %02x", d);\r |
cc68a136 |
147 | Pico_mcd->s68k_regs[0xe] = d;\r |
7a1f6e45 |
148 | #ifdef USE_POLL_DETECT\r |
149 | if ((s68k_poll_adclk&0xfe) == 0xe && s68k_poll_cnt > POLL_LIMIT) {\r |
150 | SekSetStopS68k(0); s68k_poll_adclk = 0;\r |
8f8fe01e |
151 | elprintf(EL_CDPOLL, "s68k poll release, a=%02x", a);\r |
7a1f6e45 |
152 | }\r |
153 | #endif\r |
c459aefd |
154 | return;\r |
672ad671 |
155 | }\r |
156 | \r |
157 | if ((a&0xf0) == 0x10) {\r |
cc68a136 |
158 | Pico_mcd->s68k_regs[a] = d;\r |
7a1f6e45 |
159 | #ifdef USE_POLL_DETECT\r |
160 | if ((a&0xfe) == (s68k_poll_adclk&0xfe) && s68k_poll_cnt > POLL_LIMIT) {\r |
161 | SekSetStopS68k(0); s68k_poll_adclk = 0;\r |
8f8fe01e |
162 | elprintf(EL_CDPOLL, "s68k poll release, a=%02x", a);\r |
7a1f6e45 |
163 | }\r |
164 | #endif\r |
672ad671 |
165 | return;\r |
cc68a136 |
166 | }\r |
167 | \r |
ca61ee42 |
168 | elprintf(EL_UIO, "m68k FIXME: invalid write? [%02x] %02x", a, d);\r |
cc68a136 |
169 | }\r |
170 | \r |
2433f409 |
171 | #ifndef _ASM_CD_MEMORY_C\r |
172 | static\r |
173 | #endif\r |
174 | u32 s68k_poll_detect(u32 a, u32 d)\r |
175 | {\r |
176 | #ifdef USE_POLL_DETECT\r |
ca61ee42 |
177 | // needed mostly for Cyclone, which doesn't always check it's cycle counter\r |
178 | if (SekIsStoppedS68k()) return d;\r |
2433f409 |
179 | // polling detection\r |
180 | if (a == (s68k_poll_adclk&0xff)) {\r |
181 | unsigned int clkdiff = SekCyclesDoneS68k() - (s68k_poll_adclk>>8);\r |
182 | if (clkdiff <= POLL_CYCLES) {\r |
183 | s68k_poll_cnt++;\r |
184 | //printf("-- diff: %u, cnt = %i\n", clkdiff, s68k_poll_cnt);\r |
185 | if (s68k_poll_cnt > POLL_LIMIT) {\r |
186 | SekSetStopS68k(1);\r |
8f8fe01e |
187 | elprintf(EL_CDPOLL, "s68k poll detected @ %06x, a=%02x", SekPcS68k, a);\r |
2433f409 |
188 | }\r |
189 | s68k_poll_adclk = (SekCyclesDoneS68k() << 8) | a;\r |
190 | return d;\r |
191 | }\r |
192 | }\r |
193 | s68k_poll_adclk = (SekCyclesDoneS68k() << 8) | a;\r |
194 | s68k_poll_cnt = 0;\r |
195 | #endif\r |
196 | return d;\r |
197 | }\r |
cc68a136 |
198 | \r |
913ef4b7 |
199 | #define READ_FONT_DATA(basemask) \\r |
200 | { \\r |
201 | unsigned int fnt = *(unsigned int *)(Pico_mcd->s68k_regs + 0x4c); \\r |
202 | unsigned int col0 = (fnt >> 8) & 0x0f, col1 = (fnt >> 12) & 0x0f; \\r |
203 | if (fnt & (basemask << 0)) d = col1 ; else d = col0; \\r |
204 | if (fnt & (basemask << 1)) d |= col1 << 4; else d |= col0 << 4; \\r |
205 | if (fnt & (basemask << 2)) d |= col1 << 8; else d |= col0 << 8; \\r |
206 | if (fnt & (basemask << 3)) d |= col1 << 12; else d |= col0 << 12; \\r |
207 | }\r |
208 | \r |
cc68a136 |
209 | \r |
4ff2d527 |
210 | #ifndef _ASM_CD_MEMORY_C\r |
211 | static\r |
212 | #endif\r |
213 | u32 s68k_reg_read16(u32 a)\r |
cc68a136 |
214 | {\r |
215 | u32 d=0;\r |
cc68a136 |
216 | \r |
cc68a136 |
217 | switch (a) {\r |
218 | case 0:\r |
7a1f6e45 |
219 | return ((Pico_mcd->s68k_regs[0]&3)<<8) | 1; // ver = 0, not in reset state\r |
672ad671 |
220 | case 2:\r |
2433f409 |
221 | d = (Pico_mcd->s68k_regs[2]<<8) | (Pico_mcd->s68k_regs[3]&0x1f);\r |
af37bca8 |
222 | elprintf(EL_CDREG3, "s68k_regs r3: %02x @%06x", (u8)d, SekPcS68k);\r |
2433f409 |
223 | return s68k_poll_detect(a, d);\r |
cc68a136 |
224 | case 6:\r |
7a1f6e45 |
225 | return CDC_Read_Reg();\r |
cc68a136 |
226 | case 8:\r |
7a1f6e45 |
227 | return Read_CDC_Host(1); // Gens returns 0 here on byte reads\r |
cc68a136 |
228 | case 0xC:\r |
4f265db7 |
229 | d = Pico_mcd->m.timer_stopwatch >> 16;\r |
af37bca8 |
230 | elprintf(EL_CDREGS, "s68k stopwatch timer read (%04x)", d);\r |
7a1f6e45 |
231 | return d;\r |
d1df8786 |
232 | case 0x30:\r |
af37bca8 |
233 | elprintf(EL_CDREGS, "s68k int3 timer read (%02x)", Pico_mcd->s68k_regs[31]);\r |
7a1f6e45 |
234 | return Pico_mcd->s68k_regs[31];\r |
cc68a136 |
235 | case 0x34: // fader\r |
7a1f6e45 |
236 | return 0; // no busy bit\r |
913ef4b7 |
237 | case 0x50: // font data (check: Lunar 2, Silpheed)\r |
238 | READ_FONT_DATA(0x00100000);\r |
7a1f6e45 |
239 | return d;\r |
913ef4b7 |
240 | case 0x52:\r |
241 | READ_FONT_DATA(0x00010000);\r |
7a1f6e45 |
242 | return d;\r |
913ef4b7 |
243 | case 0x54:\r |
244 | READ_FONT_DATA(0x10000000);\r |
7a1f6e45 |
245 | return d;\r |
913ef4b7 |
246 | case 0x56:\r |
247 | READ_FONT_DATA(0x01000000);\r |
7a1f6e45 |
248 | return d;\r |
cc68a136 |
249 | }\r |
250 | \r |
251 | d = (Pico_mcd->s68k_regs[a]<<8) | Pico_mcd->s68k_regs[a+1];\r |
252 | \r |
2433f409 |
253 | if (a >= 0x0e && a < 0x30)\r |
254 | return s68k_poll_detect(a, d);\r |
7a1f6e45 |
255 | \r |
cc68a136 |
256 | return d;\r |
257 | }\r |
258 | \r |
4ff2d527 |
259 | #ifndef _ASM_CD_MEMORY_C\r |
260 | static\r |
261 | #endif\r |
262 | void s68k_reg_write8(u32 a, u32 d)\r |
cc68a136 |
263 | {\r |
48e8482f |
264 | // Warning: d might have upper bits set\r |
cc68a136 |
265 | switch (a) {\r |
672ad671 |
266 | case 2:\r |
267 | return; // only m68k can change WP\r |
fa1e5e29 |
268 | case 3: {\r |
269 | int dold = Pico_mcd->s68k_regs[3];\r |
af37bca8 |
270 | elprintf(EL_CDREG3, "s68k_regs w3: %02x @%06x", (u8)d, SekPcS68k);\r |
672ad671 |
271 | d &= 0x1d;\r |
af37bca8 |
272 | d |= dold & 0xc2;\r |
273 | if (d & 4)\r |
39230401 |
274 | {\r |
4ff2d527 |
275 | if ((d ^ dold) & 5) {\r |
276 | d &= ~2; // in case of mode or bank change we clear DMNA (m68k req) bit\r |
af37bca8 |
277 | PicoMemRemapCD(d);\r |
4ff2d527 |
278 | }\r |
48e8482f |
279 | #ifdef _ASM_CD_MEMORY_C\r |
280 | if ((d ^ dold) & 0x1d)\r |
281 | PicoMemResetCDdecode(d);\r |
282 | #endif\r |
fa1e5e29 |
283 | if (!(dold & 4)) {\r |
af37bca8 |
284 | elprintf(EL_CDREG3, "wram mode 2M->1M");\r |
fa1e5e29 |
285 | wram_2M_to_1M(Pico_mcd->word_ram2M);\r |
4ff2d527 |
286 | }\r |
39230401 |
287 | }\r |
288 | else\r |
289 | {\r |
fa1e5e29 |
290 | if (dold & 4) {\r |
af37bca8 |
291 | elprintf(EL_CDREG3, "wram mode 1M->2M");\r |
4ff2d527 |
292 | if (!(d&1)) { // it didn't set the ret bit, which means it doesn't want to give WRAM to m68k\r |
293 | d &= ~3;\r |
294 | d |= (dold&1) ? 2 : 1; // then give it to the one which had bank0 in 1M mode\r |
295 | }\r |
fa1e5e29 |
296 | wram_1M_to_2M(Pico_mcd->word_ram2M);\r |
af37bca8 |
297 | PicoMemRemapCD(d);\r |
4ff2d527 |
298 | }\r |
ef090115 |
299 | // s68k can only set RET, writing 0 has no effect\r |
07ceafdb |
300 | else if ((dold ^ d) & d & 1) { // RET being set\r |
301 | SekEndRunS68k(20+16+10+12+16); // see DMNA case\r |
302 | } else\r |
303 | d |= dold & 1;\r |
304 | if (d & 1)\r |
305 | d &= ~2; // DMNA clears\r |
d0d47c5b |
306 | }\r |
672ad671 |
307 | break;\r |
fa1e5e29 |
308 | }\r |
cc68a136 |
309 | case 4:\r |
af37bca8 |
310 | elprintf(EL_CDREGS, "s68k CDC dest: %x", d&7);\r |
cc68a136 |
311 | Pico_mcd->s68k_regs[4] = (Pico_mcd->s68k_regs[4]&0xC0) | (d&7); // CDC mode\r |
312 | return;\r |
313 | case 5:\r |
c459aefd |
314 | //dprintf("s68k CDC reg addr: %x", d&0xf);\r |
cc68a136 |
315 | break;\r |
316 | case 7:\r |
317 | CDC_Write_Reg(d);\r |
318 | return;\r |
319 | case 0xa:\r |
af37bca8 |
320 | elprintf(EL_CDREGS, "s68k set CDC dma addr");\r |
cc68a136 |
321 | break;\r |
d1df8786 |
322 | case 0xc:\r |
4f265db7 |
323 | case 0xd:\r |
af37bca8 |
324 | elprintf(EL_CDREGS, "s68k set stopwatch timer");\r |
4f265db7 |
325 | Pico_mcd->m.timer_stopwatch = 0;\r |
326 | return;\r |
1cd356a3 |
327 | case 0xe:\r |
7a1f6e45 |
328 | Pico_mcd->s68k_regs[0xf] = (d>>1) | (d<<7); // ror8 1, Gens note: Dragons lair\r |
1cd356a3 |
329 | return;\r |
d1df8786 |
330 | case 0x31:\r |
af37bca8 |
331 | elprintf(EL_CDREGS, "s68k set int3 timer: %02x", d);\r |
48e8482f |
332 | Pico_mcd->m.timer_int3 = (d & 0xff) << 16;\r |
d1df8786 |
333 | break;\r |
cc68a136 |
334 | case 0x33: // IRQ mask\r |
af37bca8 |
335 | elprintf(EL_CDREGS, "s68k irq mask: %02x", d);\r |
cc68a136 |
336 | if ((d&(1<<4)) && (Pico_mcd->s68k_regs[0x37]&4) && !(Pico_mcd->s68k_regs[0x33]&(1<<4))) {\r |
337 | CDD_Export_Status();\r |
cc68a136 |
338 | }\r |
339 | break;\r |
340 | case 0x34: // fader\r |
341 | Pico_mcd->s68k_regs[a] = (u8) d & 0x7f;\r |
342 | return;\r |
672ad671 |
343 | case 0x36:\r |
344 | return; // d/m bit is unsetable\r |
345 | case 0x37: {\r |
346 | u32 d_old = Pico_mcd->s68k_regs[0x37];\r |
347 | Pico_mcd->s68k_regs[0x37] = d&7;\r |
348 | if ((d&4) && !(d_old&4)) {\r |
cc68a136 |
349 | CDD_Export_Status();\r |
cc68a136 |
350 | }\r |
672ad671 |
351 | return;\r |
352 | }\r |
cc68a136 |
353 | case 0x4b:\r |
354 | Pico_mcd->s68k_regs[a] = (u8) d;\r |
355 | CDD_Import_Command();\r |
356 | return;\r |
357 | }\r |
358 | \r |
1cd356a3 |
359 | if ((a&0x1f0) == 0x10 || (a >= 0x38 && a < 0x42))\r |
cc68a136 |
360 | {\r |
ca61ee42 |
361 | elprintf(EL_UIO, "s68k FIXME: invalid write @ %02x?", a);\r |
cc68a136 |
362 | return;\r |
363 | }\r |
364 | \r |
365 | Pico_mcd->s68k_regs[a] = (u8) d;\r |
366 | }\r |
367 | \r |
af37bca8 |
368 | // -----------------------------------------------------------------\r |
369 | // Main 68k\r |
370 | // -----------------------------------------------------------------\r |
cc68a136 |
371 | \r |
af37bca8 |
372 | #ifndef _ASM_CD_MEMORY_C\r |
373 | #include "cell_map.c"\r |
374 | #endif\r |
375 | \r |
376 | // WORD RAM, cell aranged area (220000 - 23ffff)\r |
377 | static u32 PicoReadM68k8_cell(u32 a)\r |
cc68a136 |
378 | {\r |
af37bca8 |
379 | int bank = Pico_mcd->s68k_regs[3] & 1;\r |
380 | a = (a&3) | (cell_map(a >> 2) << 2); // cell arranged\r |
381 | return Pico_mcd->word_ram1M[bank][a ^ 1];\r |
382 | }\r |
cc68a136 |
383 | \r |
af37bca8 |
384 | static u32 PicoReadM68k16_cell(u32 a)\r |
385 | {\r |
386 | int bank = Pico_mcd->s68k_regs[3] & 1;\r |
387 | a = (a&2) | (cell_map(a >> 2) << 2);\r |
388 | return *(u16 *)(Pico_mcd->word_ram1M[bank] + a);\r |
389 | }\r |
cc68a136 |
390 | \r |
af37bca8 |
391 | static void PicoWriteM68k8_cell(u32 a, u32 d)\r |
392 | {\r |
393 | int bank = Pico_mcd->s68k_regs[3] & 1;\r |
394 | a = (a&3) | (cell_map(a >> 2) << 2);\r |
395 | Pico_mcd->word_ram1M[bank][a ^ 1] = d;\r |
396 | }\r |
8022f53d |
397 | \r |
af37bca8 |
398 | static void PicoWriteM68k16_cell(u32 a, u32 d)\r |
399 | {\r |
400 | int bank = Pico_mcd->s68k_regs[3] & 1;\r |
401 | a = (a&3) | (cell_map(a >> 2) << 2);\r |
402 | *(u16 *)(Pico_mcd->word_ram1M[bank] + a) = d;\r |
403 | }\r |
404 | \r |
405 | // RAM cart (40000 - 7fffff, optional)\r |
406 | static u32 PicoReadM68k8_ramc(u32 a)\r |
407 | {\r |
408 | u32 d = 0;\r |
409 | if (a == 0x400001) {\r |
410 | if (SRam.data != NULL)\r |
411 | d = 3; // 64k cart\r |
412 | return d;\r |
8022f53d |
413 | }\r |
414 | \r |
af37bca8 |
415 | if ((a & 0xfe0000) == 0x600000) {\r |
416 | if (SRam.data != NULL)\r |
417 | d = SRam.data[((a >> 1) & 0xffff) + 0x2000];\r |
418 | return d;\r |
8022f53d |
419 | }\r |
420 | \r |
af37bca8 |
421 | if (a == 0x7fffff)\r |
422 | return Pico_mcd->m.bcram_reg;\r |
cc68a136 |
423 | \r |
af37bca8 |
424 | elprintf(EL_UIO, "m68k unmapped r8 [%06x] @%06x", a, SekPc);\r |
cc68a136 |
425 | return d;\r |
426 | }\r |
427 | \r |
af37bca8 |
428 | static u32 PicoReadM68k16_ramc(u32 a)\r |
cc68a136 |
429 | {\r |
af37bca8 |
430 | elprintf(EL_ANOMALY, "ramcart r16: [%06x] @%06x", a, SekPcS68k);\r |
431 | return PicoReadM68k8_ramc(a + 1);\r |
432 | }\r |
cc68a136 |
433 | \r |
af37bca8 |
434 | static void PicoWriteM68k8_ramc(u32 a, u32 d)\r |
435 | {\r |
436 | if ((a & 0xfe0000) == 0x600000) {\r |
437 | if (SRam.data != NULL && (Pico_mcd->m.bcram_reg & 1)) {\r |
438 | SRam.data[((a>>1) & 0xffff) + 0x2000] = d;\r |
8022f53d |
439 | SRam.changed = 1;\r |
440 | }\r |
441 | return;\r |
442 | }\r |
443 | \r |
af37bca8 |
444 | if (a == 0x7fffff) {\r |
445 | Pico_mcd->m.bcram_reg = d;\r |
8022f53d |
446 | return;\r |
447 | }\r |
448 | \r |
af37bca8 |
449 | elprintf(EL_UIO, "m68k unmapped w8 [%06x] %02x @%06x", a, d & 0xff, SekPc);\r |
cc68a136 |
450 | }\r |
451 | \r |
af37bca8 |
452 | static void PicoWriteM68k16_ramc(u32 a, u32 d)\r |
cc68a136 |
453 | {\r |
af37bca8 |
454 | elprintf(EL_ANOMALY, "ramcart w16: [%06x] %04x @%06x", a, d, SekPcS68k);\r |
455 | PicoWriteM68k8_ramc(a + 1, d);\r |
cc68a136 |
456 | }\r |
457 | \r |
af37bca8 |
458 | // IO/control/cd registers (a10000 - ...)\r |
459 | static u32 PicoReadM68k8_io(u32 a)\r |
cc68a136 |
460 | {\r |
af37bca8 |
461 | u32 d;\r |
462 | if ((a & 0xff00) == 0x2000) { // a12000 - a120ff\r |
463 | d = m68k_reg_read16(a); // TODO: m68k_reg_read8\r |
464 | if (!(a & 1))\r |
465 | d >>= 8;\r |
466 | d &= 0xff;\r |
467 | elprintf(EL_CDREGS, "m68k_regs r8: [%02x] %02x @%06x", a & 0x3f, d, SekPc);\r |
468 | return d;\r |
469 | }\r |
470 | \r |
471 | // fallback to default MD handler\r |
472 | return PicoRead8_io(a);\r |
cc68a136 |
473 | }\r |
474 | \r |
af37bca8 |
475 | static u32 PicoReadM68k16_io(u32 a)\r |
cc68a136 |
476 | {\r |
af37bca8 |
477 | u32 d;\r |
478 | if ((a & 0xff00) == 0x2000) {\r |
479 | d = m68k_reg_read16(a);\r |
480 | elprintf(EL_CDREGS, "m68k_regs r16: [%02x] %04x @%06x", a & 0x3f, d, SekPc);\r |
481 | return d;\r |
b542be46 |
482 | }\r |
cc68a136 |
483 | \r |
af37bca8 |
484 | return PicoRead16_io(a);\r |
cc68a136 |
485 | }\r |
486 | \r |
af37bca8 |
487 | static void PicoWriteM68k8_io(u32 a, u32 d)\r |
cc68a136 |
488 | {\r |
af37bca8 |
489 | if ((a & 0xff00) == 0x2000) { // a12000 - a120ff\r |
490 | elprintf(EL_CDREGS, "m68k_regs w8: [%02x] %02x @%06x", a&0x3f, d, SekPc);\r |
2433f409 |
491 | m68k_reg_write8(a, d);\r |
492 | return;\r |
493 | }\r |
672ad671 |
494 | \r |
af37bca8 |
495 | PicoWrite16_io(a, d);\r |
cc68a136 |
496 | }\r |
ab0607f7 |
497 | \r |
af37bca8 |
498 | static void PicoWriteM68k16_io(u32 a, u32 d)\r |
cc68a136 |
499 | {\r |
af37bca8 |
500 | if ((a & 0xff00) == 0x2000) { // a12000 - a120ff\r |
501 | elprintf(EL_CDREGS, "m68k_regs w16: [%02x] %04x @%06x", a&0x3f, d, SekPc);\r |
502 | /* TODO FIXME?\r |
7a1f6e45 |
503 | if (a == 0xe) { // special case, 2 byte writes would be handled differently\r |
504 | Pico_mcd->s68k_regs[0xe] = d >> 8;\r |
505 | #ifdef USE_POLL_DETECT\r |
506 | if ((s68k_poll_adclk&0xfe) == 0xe && s68k_poll_cnt > POLL_LIMIT) {\r |
6cadc2da |
507 | SekSetStopS68k(0); s68k_poll_adclk = 0;\r |
8f8fe01e |
508 | elprintf(EL_CDPOLL, "s68k poll release, a=%02x", a);\r |
7a1f6e45 |
509 | }\r |
510 | #endif\r |
511 | return;\r |
512 | }\r |
af37bca8 |
513 | */\r |
514 | m68k_reg_write8(a, d >> 8);\r |
515 | m68k_reg_write8(a + 1, d & 0xff);\r |
b542be46 |
516 | return;\r |
517 | }\r |
518 | \r |
af37bca8 |
519 | PicoWrite16_io(a, d);\r |
cc68a136 |
520 | }\r |
cc68a136 |
521 | \r |
721cd396 |
522 | // -----------------------------------------------------------------\r |
af37bca8 |
523 | // Sub 68k\r |
cc68a136 |
524 | // -----------------------------------------------------------------\r |
525 | \r |
af37bca8 |
526 | static u32 s68k_unmapped_read8(u32 a)\r |
cc68a136 |
527 | {\r |
af37bca8 |
528 | elprintf(EL_UIO, "s68k unmapped r8 [%06x] @%06x", a, SekPc);\r |
529 | return 0;\r |
cc68a136 |
530 | }\r |
531 | \r |
af37bca8 |
532 | static u32 s68k_unmapped_read16(u32 a)\r |
cc68a136 |
533 | {\r |
af37bca8 |
534 | elprintf(EL_UIO, "s68k unmapped r16 [%06x] @%06x", a, SekPc);\r |
535 | return 0;\r |
536 | }\r |
4f265db7 |
537 | \r |
af37bca8 |
538 | static void s68k_unmapped_write8(u32 a, u32 d)\r |
539 | {\r |
540 | elprintf(EL_UIO, "s68k unmapped w8 [%06x] %02x @%06x", a, d & 0xff, SekPc);\r |
541 | }\r |
cc68a136 |
542 | \r |
af37bca8 |
543 | static void s68k_unmapped_write16(u32 a, u32 d)\r |
544 | {\r |
545 | elprintf(EL_UIO, "s68k unmapped w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc);\r |
546 | }\r |
cc68a136 |
547 | \r |
af37bca8 |
548 | // decode (080000 - 0bffff, in 1M mode)\r |
549 | static u32 PicoReadS68k8_dec(u32 a)\r |
550 | {\r |
551 | u32 d, bank;\r |
552 | bank = (Pico_mcd->s68k_regs[3] & 1) ^ 1;\r |
553 | d = Pico_mcd->word_ram1M[bank][((a >> 1) ^ 1) & 0x1ffff];\r |
554 | if (a & 1)\r |
555 | d &= 0x0f;\r |
556 | else\r |
557 | d >>= 4;\r |
cc68a136 |
558 | return d;\r |
559 | }\r |
560 | \r |
af37bca8 |
561 | static u32 PicoReadS68k16_dec(u32 a)\r |
cc68a136 |
562 | {\r |
af37bca8 |
563 | u32 d, bank;\r |
564 | bank = (Pico_mcd->s68k_regs[3] & 1) ^ 1;\r |
565 | d = Pico_mcd->word_ram1M[bank][((a >> 1) ^ 1) & 0x1ffff];\r |
566 | d |= d << 4;\r |
567 | d &= ~0xf0;\r |
cc68a136 |
568 | return d;\r |
569 | }\r |
ab0607f7 |
570 | \r |
0a051f55 |
571 | /* check: jaguar xj 220 (draws entire world using decode) */\r |
af37bca8 |
572 | static void PicoWriteS68k8_dec(u32 a, u32 d)\r |
0a051f55 |
573 | {\r |
af37bca8 |
574 | u8 r3 = Pico_mcd->s68k_regs[3];\r |
575 | u8 *pd = &Pico_mcd->word_ram1M[(r3 & 1) ^ 1][((a >> 1) ^ 1) & 0x1ffff];\r |
576 | u8 oldmask = (a & 1) ? 0xf0 : 0x0f;\r |
0a051f55 |
577 | \r |
0a051f55 |
578 | r3 &= 0x18;\r |
579 | d &= 0x0f;\r |
af37bca8 |
580 | if (!(a & 1))\r |
581 | d <<= 4;\r |
0a051f55 |
582 | \r |
0a051f55 |
583 | if (r3 == 8) {\r |
af37bca8 |
584 | if ((!(*pd & (~oldmask))) && d)\r |
585 | goto do_it;\r |
0a051f55 |
586 | } else if (r3 > 8) {\r |
af37bca8 |
587 | if (d)\r |
588 | goto do_it;\r |
589 | } else\r |
0a051f55 |
590 | goto do_it;\r |
0a051f55 |
591 | \r |
592 | return;\r |
af37bca8 |
593 | \r |
0a051f55 |
594 | do_it:\r |
595 | *pd = d | (*pd & oldmask);\r |
596 | }\r |
597 | \r |
af37bca8 |
598 | static void PicoWriteS68k16_dec(u32 a, u32 d)\r |
0a051f55 |
599 | {\r |
af37bca8 |
600 | u8 r3 = Pico_mcd->s68k_regs[3];\r |
601 | u8 *pd = &Pico_mcd->word_ram1M[(r3 & 1) ^ 1][((a >> 1) ^ 1) & 0x1ffff];\r |
0a051f55 |
602 | \r |
603 | //if ((a & 0x3ffff) < 0x28000) return;\r |
604 | \r |
605 | r3 &= 0x18;\r |
606 | d &= 0x0f0f;\r |
607 | d |= d >> 4;\r |
608 | \r |
609 | if (r3 == 8) {\r |
610 | u8 dold = *pd;\r |
611 | if (!(dold & 0xf0)) dold |= d & 0xf0;\r |
612 | if (!(dold & 0x0f)) dold |= d & 0x0f;\r |
613 | *pd = dold;\r |
614 | } else if (r3 > 8) {\r |
615 | u8 dold = *pd;\r |
616 | if (!(d & 0xf0)) d |= dold & 0xf0;\r |
617 | if (!(d & 0x0f)) d |= dold & 0x0f;\r |
618 | *pd = d;\r |
619 | } else {\r |
620 | *pd = d;\r |
621 | }\r |
0a051f55 |
622 | }\r |
0a051f55 |
623 | \r |
af37bca8 |
624 | // backup RAM (fe0000 - feffff)\r |
625 | static u32 PicoReadS68k8_bram(u32 a)\r |
626 | {\r |
627 | return Pico_mcd->bram[(a>>1)&0x1fff];\r |
628 | }\r |
cc68a136 |
629 | \r |
af37bca8 |
630 | static u32 PicoReadS68k16_bram(u32 a)\r |
cc68a136 |
631 | {\r |
af37bca8 |
632 | u32 d;\r |
633 | elprintf(EL_ANOMALY, "FIXME: s68k_bram r16: [%06x] @%06x", a, SekPcS68k);\r |
634 | a = (a >> 1) & 0x1fff;\r |
635 | d = Pico_mcd->bram[a++];\r |
636 | d|= Pico_mcd->bram[a++] << 8; // probably wrong, TODO: verify\r |
637 | return d;\r |
638 | }\r |
cc68a136 |
639 | \r |
af37bca8 |
640 | static void PicoWriteS68k8_bram(u32 a, u32 d)\r |
641 | {\r |
642 | Pico_mcd->bram[(a >> 1) & 0x1fff] = d;\r |
643 | SRam.changed = 1;\r |
644 | }\r |
cc68a136 |
645 | \r |
af37bca8 |
646 | static void PicoWriteS68k16_bram(u32 a, u32 d)\r |
647 | {\r |
648 | elprintf(EL_ANOMALY, "s68k_bram w16: [%06x] %04x @%06x", a, d, SekPcS68k);\r |
649 | a = (a >> 1) & 0x1fff;\r |
650 | Pico_mcd->bram[a++] = d;\r |
651 | Pico_mcd->bram[a++] = d >> 8; // TODO: verify..\r |
652 | SRam.changed = 1;\r |
653 | }\r |
b5e5172d |
654 | \r |
af37bca8 |
655 | // PCM and registers (ff0000 - ffffff)\r |
656 | static u32 PicoReadS68k8_pr(u32 a)\r |
657 | {\r |
658 | u32 d = 0;\r |
cc68a136 |
659 | \r |
660 | // regs\r |
af37bca8 |
661 | if ((a & 0xfe00) == 0x8000) {\r |
cb4a513a |
662 | a &= 0x1ff;\r |
af37bca8 |
663 | elprintf(EL_CDREGS, "s68k_regs r8: [%02x] @ %06x", a, SekPcS68k);\r |
664 | if (a >= 0x0e && a < 0x30) {\r |
665 | d = Pico_mcd->s68k_regs[a];\r |
666 | s68k_poll_detect(a, d);\r |
667 | elprintf(EL_CDREGS, "ret = %02x", (u8)d);\r |
668 | return d;\r |
d0d47c5b |
669 | }\r |
af37bca8 |
670 | else if (a >= 0x58 && a < 0x68)\r |
671 | d = gfx_cd_read(a & ~1);\r |
672 | else d = s68k_reg_read16(a & ~1);\r |
673 | if (!(a & 1))\r |
674 | d >>= 8;\r |
675 | elprintf(EL_CDREGS, "ret = %02x", (u8)d);\r |
676 | return d & 0xff;\r |
d0d47c5b |
677 | }\r |
678 | \r |
4f265db7 |
679 | // PCM\r |
af37bca8 |
680 | if ((a & 0x8000) == 0x0000) {\r |
4f265db7 |
681 | a &= 0x7fff;\r |
682 | if (a >= 0x2000)\r |
af37bca8 |
683 | d = Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][(a >> 1) & 0xfff];\r |
684 | else if (a >= 0x20) {\r |
685 | a &= 0x1e;\r |
686 | d = Pico_mcd->pcm.ch[a>>2].addr >> PCM_STEP_SHIFT;\r |
687 | if (a & 2)\r |
688 | d >>= 8;\r |
689 | }\r |
690 | return d & 0xff;\r |
ab0607f7 |
691 | }\r |
692 | \r |
af37bca8 |
693 | return s68k_unmapped_read8(a);\r |
cc68a136 |
694 | }\r |
695 | \r |
af37bca8 |
696 | static u32 PicoReadS68k16_pr(u32 a)\r |
cc68a136 |
697 | {\r |
af37bca8 |
698 | u32 d = 0;\r |
cc68a136 |
699 | \r |
700 | // regs\r |
af37bca8 |
701 | if ((a & 0xfe00) == 0x8000) {\r |
cb4a513a |
702 | a &= 0x1fe;\r |
af37bca8 |
703 | elprintf(EL_CDREGS, "s68k_regs r16: [%02x] @ %06x", a, SekPcS68k);\r |
704 | if (0x58 <= a && a < 0x68)\r |
705 | d = gfx_cd_read(a);\r |
706 | else d = s68k_reg_read16(a);\r |
707 | elprintf(EL_CDREGS, "ret = %04x", d);\r |
708 | return d;\r |
cc68a136 |
709 | }\r |
710 | \r |
af37bca8 |
711 | // PCM\r |
712 | if ((a & 0x8000) == 0x0000) {\r |
713 | //elprintf(EL_ANOMALY, "FIXME: s68k_pcm r16: [%06x] @%06x", a, SekPcS68k);\r |
714 | a &= 0x7fff;\r |
715 | if (a >= 0x2000)\r |
716 | d = Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][(a>>1)&0xfff];\r |
717 | else if (a >= 0x20) {\r |
718 | a &= 0x1e;\r |
719 | d = Pico_mcd->pcm.ch[a>>2].addr >> PCM_STEP_SHIFT;\r |
720 | if (a & 2) d >>= 8;\r |
d0d47c5b |
721 | }\r |
af37bca8 |
722 | elprintf(EL_CDREGS, "ret = %04x", d);\r |
723 | return d;\r |
d0d47c5b |
724 | }\r |
725 | \r |
af37bca8 |
726 | return s68k_unmapped_read16(a);\r |
727 | }\r |
728 | \r |
729 | static void PicoWriteS68k8_pr(u32 a, u32 d)\r |
730 | {\r |
731 | // regs\r |
732 | if ((a & 0xfe00) == 0x8000) {\r |
733 | a &= 0x1ff;\r |
734 | elprintf(EL_CDREGS, "s68k_regs w8: [%02x] %02x @ %06x", a, d, SekPcS68k);\r |
735 | if (0x58 <= a && a < 0x68)\r |
736 | gfx_cd_write16(a&~1, (d<<8)|d);\r |
737 | else s68k_reg_write8(a,d);\r |
d0d47c5b |
738 | return;\r |
739 | }\r |
740 | \r |
4f265db7 |
741 | // PCM\r |
af37bca8 |
742 | if ((a & 0x8000) == 0x0000) {\r |
4f265db7 |
743 | a &= 0x7fff;\r |
744 | if (a >= 0x2000)\r |
745 | Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][(a>>1)&0xfff] = d;\r |
746 | else if (a < 0x12)\r |
af37bca8 |
747 | pcm_write(a>>1, d);\r |
ab0607f7 |
748 | return;\r |
749 | }\r |
750 | \r |
af37bca8 |
751 | s68k_unmapped_write8(a, d);\r |
cc68a136 |
752 | }\r |
ab0607f7 |
753 | \r |
af37bca8 |
754 | static void PicoWriteS68k16_pr(u32 a, u32 d)\r |
cc68a136 |
755 | {\r |
cc68a136 |
756 | // regs\r |
af37bca8 |
757 | if ((a & 0xfe00) == 0x8000) {\r |
cb4a513a |
758 | a &= 0x1fe;\r |
af37bca8 |
759 | elprintf(EL_CDREGS, "s68k_regs w16: [%02x] %04x @ %06x", a, d, SekPcS68k);\r |
760 | if (a >= 0x58 && a < 0x68)\r |
761 | gfx_cd_write16(a, d);\r |
762 | else {\r |
763 | if (a == 0xe) {\r |
764 | // special case, 2 byte writes would be handled differently\r |
765 | // TODO: verify\r |
766 | Pico_mcd->s68k_regs[0xf] = d;\r |
767 | return;\r |
768 | }\r |
769 | s68k_reg_write8(a, d >> 8);\r |
770 | s68k_reg_write8(a + 1, d & 0xff);\r |
d0d47c5b |
771 | }\r |
772 | return;\r |
773 | }\r |
774 | \r |
4f265db7 |
775 | // PCM\r |
af37bca8 |
776 | if ((a & 0x8000) == 0x0000) {\r |
4f265db7 |
777 | a &= 0x7fff;\r |
af37bca8 |
778 | if (a >= 0x2000)\r |
779 | Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][(a>>1)&0xfff] = d;\r |
780 | else if (a < 0x12)\r |
781 | pcm_write(a>>1, d & 0xff);\r |
ab0607f7 |
782 | return;\r |
783 | }\r |
784 | \r |
af37bca8 |
785 | s68k_unmapped_write16(a, d);\r |
cc68a136 |
786 | }\r |
cc68a136 |
787 | \r |
788 | // -----------------------------------------------------------------\r |
789 | \r |
3aa1e148 |
790 | #ifdef EMU_C68K\r |
b837b69b |
791 | static __inline int PicoMemBaseM68k(u32 pc)\r |
792 | {\r |
fa1e5e29 |
793 | if ((pc&0xe00000)==0xe00000)\r |
794 | return (int)Pico.ram-(pc&0xff0000); // Program Counter in Ram\r |
b837b69b |
795 | \r |
796 | if (pc < 0x20000)\r |
fa1e5e29 |
797 | return (int)Pico_mcd->bios; // Program Counter in BIOS\r |
798 | \r |
799 | if ((pc&0xfc0000)==0x200000)\r |
b837b69b |
800 | {\r |
fa1e5e29 |
801 | if (!(Pico_mcd->s68k_regs[3]&4))\r |
802 | return (int)Pico_mcd->word_ram2M - 0x200000; // Program Counter in Word Ram\r |
803 | if (pc < 0x220000) {\r |
3aa1e148 |
804 | int bank = Pico_mcd->s68k_regs[3]&1;\r |
fa1e5e29 |
805 | return (int)Pico_mcd->word_ram1M[bank] - 0x200000;\r |
806 | }\r |
b837b69b |
807 | }\r |
808 | \r |
fa1e5e29 |
809 | // Error - Program Counter is invalid\r |
ca61ee42 |
810 | elprintf(EL_ANOMALY, "m68k FIXME: unhandled jump to %06x", pc);\r |
fa1e5e29 |
811 | \r |
812 | return (int)Pico_mcd->bios;\r |
b837b69b |
813 | }\r |
814 | \r |
815 | \r |
816 | static u32 PicoCheckPcM68k(u32 pc)\r |
817 | {\r |
3aa1e148 |
818 | pc-=PicoCpuCM68k.membase; // Get real pc\r |
b837b69b |
819 | pc&=0xfffffe;\r |
820 | \r |
3aa1e148 |
821 | PicoCpuCM68k.membase=PicoMemBaseM68k(pc);\r |
b837b69b |
822 | \r |
3aa1e148 |
823 | return PicoCpuCM68k.membase+pc;\r |
b837b69b |
824 | }\r |
825 | \r |
826 | \r |
827 | static __inline int PicoMemBaseS68k(u32 pc)\r |
828 | {\r |
fa1e5e29 |
829 | if (pc < 0x80000) // PRG RAM\r |
830 | return (int)Pico_mcd->prg_ram;\r |
b837b69b |
831 | \r |
fa1e5e29 |
832 | if ((pc&0xfc0000)==0x080000) // WORD RAM 2M area (assume we are in the right mode..)\r |
833 | return (int)Pico_mcd->word_ram2M - 0x080000;\r |
834 | \r |
835 | if ((pc&0xfe0000)==0x0c0000) { // word RAM 1M area\r |
3aa1e148 |
836 | int bank = (Pico_mcd->s68k_regs[3]&1)^1;\r |
fa1e5e29 |
837 | return (int)Pico_mcd->word_ram1M[bank] - 0x0c0000;\r |
b837b69b |
838 | }\r |
839 | \r |
fa1e5e29 |
840 | // Error - Program Counter is invalid\r |
ca61ee42 |
841 | elprintf(EL_ANOMALY, "s68k FIXME: unhandled jump to %06x", pc);\r |
fa1e5e29 |
842 | \r |
843 | return (int)Pico_mcd->prg_ram;\r |
b837b69b |
844 | }\r |
845 | \r |
846 | \r |
847 | static u32 PicoCheckPcS68k(u32 pc)\r |
848 | {\r |
3aa1e148 |
849 | pc-=PicoCpuCS68k.membase; // Get real pc\r |
b837b69b |
850 | pc&=0xfffffe;\r |
851 | \r |
3aa1e148 |
852 | PicoCpuCS68k.membase=PicoMemBaseS68k(pc);\r |
b837b69b |
853 | \r |
3aa1e148 |
854 | return PicoCpuCS68k.membase+pc;\r |
b837b69b |
855 | }\r |
856 | #endif\r |
857 | \r |
af37bca8 |
858 | // TODO: probably split\r |
859 | void PicoMemRemapCD(int r3)\r |
3aa1e148 |
860 | {\r |
af37bca8 |
861 | void *bank;\r |
862 | \r |
863 | // PRG RAM\r |
864 | if (Pico_mcd->m.busreq & 2) {\r |
865 | bank = Pico_mcd->prg_ram_b[Pico_mcd->s68k_regs[3] >> 6];\r |
866 | cpu68k_map_all_ram(0x020000, 0x03ffff, bank, 0);\r |
867 | }\r |
868 | else {\r |
869 | m68k_map_unmap(0x020000, 0x03ffff);\r |
870 | }\r |
871 | \r |
872 | // WORD RAM\r |
873 | if (!(r3 & 4)) {\r |
874 | // 2M mode. XXX: allowing access in all cases for simplicity\r |
875 | bank = Pico_mcd->word_ram2M;\r |
876 | cpu68k_map_all_ram(0x200000, 0x23ffff, bank, 0);\r |
877 | cpu68k_map_all_ram(0x080000, 0x0bffff, bank, 1);\r |
878 | // TODO: handle 0x0c0000\r |
879 | }\r |
880 | else {\r |
881 | bank = Pico_mcd->word_ram1M[r3 & 1];\r |
882 | cpu68k_map_all_ram(0x200000, 0x21ffff, bank, 0);\r |
883 | bank = Pico_mcd->word_ram1M[(r3 & 1) ^ 1];\r |
884 | cpu68k_map_all_ram(0x0c0000, 0x0effff, bank, 1);\r |
885 | // "cell arrange" on m68k\r |
886 | cpu68k_map_set(m68k_read8_map, 0x220000, 0x23ffff, PicoReadM68k8_cell, 1);\r |
887 | cpu68k_map_set(m68k_read16_map, 0x220000, 0x23ffff, PicoReadM68k16_cell, 1);\r |
888 | cpu68k_map_set(m68k_write8_map, 0x220000, 0x23ffff, PicoWriteM68k8_cell, 1);\r |
889 | cpu68k_map_set(m68k_write16_map, 0x220000, 0x23ffff, PicoWriteM68k16_cell, 1);\r |
890 | // "decode format" on s68k\r |
891 | cpu68k_map_set(s68k_read8_map, 0x080000, 0x0bffff, PicoReadS68k8_dec, 1);\r |
892 | cpu68k_map_set(s68k_read16_map, 0x080000, 0x0bffff, PicoReadS68k16_dec, 1);\r |
893 | cpu68k_map_set(s68k_write8_map, 0x080000, 0x0bffff, PicoWriteS68k8_dec, 1);\r |
894 | cpu68k_map_set(s68k_write16_map, 0x080000, 0x0bffff, PicoWriteS68k16_dec, 1);\r |
895 | }\r |
896 | \r |
3aa1e148 |
897 | #ifdef EMU_F68K\r |
898 | // update fetchmap..\r |
899 | int i;\r |
900 | if (!(r3 & 4))\r |
901 | {\r |
902 | for (i = M68K_FETCHBANK1*2/16; (i<<(24-FAMEC_FETCHBITS)) < 0x240000; i++)\r |
903 | PicoCpuFM68k.Fetch[i] = (unsigned int)Pico_mcd->word_ram2M - 0x200000;\r |
904 | }\r |
905 | else\r |
906 | {\r |
907 | for (i = M68K_FETCHBANK1*2/16; (i<<(24-FAMEC_FETCHBITS)) < 0x220000; i++)\r |
908 | PicoCpuFM68k.Fetch[i] = (unsigned int)Pico_mcd->word_ram1M[r3 & 1] - 0x200000;\r |
909 | for (i = M68K_FETCHBANK1*0x0c/0x100; (i<<(24-FAMEC_FETCHBITS)) < 0x0e0000; i++)\r |
910 | PicoCpuFS68k.Fetch[i] = (unsigned int)Pico_mcd->word_ram1M[(r3&1)^1] - 0x0c0000;\r |
911 | }\r |
912 | #endif\r |
913 | }\r |
b837b69b |
914 | \r |
9037e45d |
915 | #ifdef EMU_M68K\r |
916 | static void m68k_mem_setup_cd(void);\r |
917 | #endif\r |
918 | \r |
eff55556 |
919 | PICO_INTERNAL void PicoMemSetupCD(void)\r |
b837b69b |
920 | {\r |
af37bca8 |
921 | // setup default main68k map\r |
922 | PicoMemSetup();\r |
923 | \r |
924 | // PicoMemRemapCD() will set up RAMs, so not done here\r |
925 | \r |
926 | // main68k map (BIOS mapped by PicoMemSetup()):\r |
927 | // RAM cart\r |
928 | if (PicoOpt & POPT_EN_MCD_RAMCART) {\r |
929 | cpu68k_map_set(m68k_read8_map, 0x400000, 0x7fffff, PicoReadM68k8_ramc, 1);\r |
930 | cpu68k_map_set(m68k_read16_map, 0x400000, 0x7fffff, PicoReadM68k16_ramc, 1);\r |
931 | cpu68k_map_set(m68k_write8_map, 0x400000, 0x7fffff, PicoWriteM68k8_ramc, 1);\r |
932 | cpu68k_map_set(m68k_write16_map, 0x400000, 0x7fffff, PicoWriteM68k16_ramc, 1);\r |
933 | }\r |
934 | \r |
935 | // registers/IO:\r |
936 | cpu68k_map_set(m68k_read8_map, 0xa10000, 0xa1ffff, PicoReadM68k8_io, 1);\r |
937 | cpu68k_map_set(m68k_read16_map, 0xa10000, 0xa1ffff, PicoReadM68k16_io, 1);\r |
938 | cpu68k_map_set(m68k_write8_map, 0xa10000, 0xa1ffff, PicoWriteM68k8_io, 1);\r |
939 | cpu68k_map_set(m68k_write16_map, 0xa10000, 0xa1ffff, PicoWriteM68k16_io, 1);\r |
940 | \r |
941 | // sub68k map\r |
942 | cpu68k_map_set(s68k_read8_map, 0x000000, 0xffffff, s68k_unmapped_read8, 1);\r |
943 | cpu68k_map_set(s68k_read16_map, 0x000000, 0xffffff, s68k_unmapped_read16, 1);\r |
944 | cpu68k_map_set(s68k_write8_map, 0x000000, 0xffffff, s68k_unmapped_write8, 1);\r |
945 | cpu68k_map_set(s68k_write16_map, 0x000000, 0xffffff, s68k_unmapped_write16, 1);\r |
946 | \r |
947 | // PRG RAM\r |
948 | cpu68k_map_set(s68k_read8_map, 0x000000, 0x07ffff, Pico_mcd->prg_ram, 0);\r |
949 | cpu68k_map_set(s68k_read16_map, 0x000000, 0x07ffff, Pico_mcd->prg_ram, 0);\r |
950 | cpu68k_map_set(s68k_write8_map, 0x000000, 0x07ffff, Pico_mcd->prg_ram, 0);\r |
951 | cpu68k_map_set(s68k_write16_map, 0x000000, 0x07ffff, Pico_mcd->prg_ram, 0);\r |
952 | \r |
953 | // BRAM\r |
954 | cpu68k_map_set(s68k_read8_map, 0xfe0000, 0xfeffff, PicoReadS68k8_bram, 1);\r |
955 | cpu68k_map_set(s68k_read16_map, 0xfe0000, 0xfeffff, PicoReadS68k16_bram, 1);\r |
956 | cpu68k_map_set(s68k_write8_map, 0xfe0000, 0xfeffff, PicoWriteS68k8_bram, 1);\r |
957 | cpu68k_map_set(s68k_write16_map, 0xfe0000, 0xfeffff, PicoWriteS68k16_bram, 1);\r |
958 | \r |
959 | // PCM, regs\r |
960 | cpu68k_map_set(s68k_read8_map, 0xff0000, 0xffffff, PicoReadS68k8_pr, 1);\r |
961 | cpu68k_map_set(s68k_read16_map, 0xff0000, 0xffffff, PicoReadS68k16_pr, 1);\r |
962 | cpu68k_map_set(s68k_write8_map, 0xff0000, 0xffffff, PicoWriteS68k8_pr, 1);\r |
963 | cpu68k_map_set(s68k_write16_map, 0xff0000, 0xffffff, PicoWriteS68k16_pr, 1);\r |
f53f286a |
964 | \r |
b837b69b |
965 | #ifdef EMU_C68K\r |
af37bca8 |
966 | PicoCpuCM68k.checkpc = PicoCheckPcM68k;\r |
b837b69b |
967 | // s68k\r |
af37bca8 |
968 | PicoCpuCS68k.checkpc = PicoCheckPcS68k;\r |
969 | PicoCpuCS68k.fetch8 = PicoCpuCS68k.read8 = s68k_read8;\r |
970 | PicoCpuCS68k.fetch16 = PicoCpuCS68k.read16 = s68k_read16;\r |
971 | PicoCpuCS68k.fetch32 = PicoCpuCS68k.read32 = s68k_read32;\r |
972 | PicoCpuCS68k.write8 = s68k_write8;\r |
973 | PicoCpuCS68k.write16 = s68k_write16;\r |
974 | PicoCpuCS68k.write32 = s68k_write32;\r |
b837b69b |
975 | #endif\r |
3aa1e148 |
976 | #ifdef EMU_F68K\r |
3aa1e148 |
977 | // s68k\r |
af37bca8 |
978 | PicoCpuFS68k.read_byte = s68k_read8;\r |
979 | PicoCpuFS68k.read_word = s68k_read16;\r |
980 | PicoCpuFS68k.read_long = s68k_read32;\r |
981 | PicoCpuFS68k.write_byte = s68k_write8;\r |
982 | PicoCpuFS68k.write_word = s68k_write16;\r |
983 | PicoCpuFS68k.write_long = s68k_write32;\r |
3aa1e148 |
984 | \r |
985 | // setup FAME fetchmap\r |
986 | {\r |
987 | int i;\r |
988 | // M68k\r |
989 | // by default, point everything to fitst 64k of ROM (BIOS)\r |
990 | for (i = 0; i < M68K_FETCHBANK1; i++)\r |
991 | PicoCpuFM68k.Fetch[i] = (unsigned int)Pico.rom - (i<<(24-FAMEC_FETCHBITS));\r |
992 | // now real ROM (BIOS)\r |
993 | for (i = 0; i < M68K_FETCHBANK1 && (i<<(24-FAMEC_FETCHBITS)) < Pico.romsize; i++)\r |
994 | PicoCpuFM68k.Fetch[i] = (unsigned int)Pico.rom;\r |
995 | // .. and RAM\r |
996 | for (i = M68K_FETCHBANK1*14/16; i < M68K_FETCHBANK1; i++)\r |
997 | PicoCpuFM68k.Fetch[i] = (unsigned int)Pico.ram - (i<<(24-FAMEC_FETCHBITS));\r |
998 | // S68k\r |
999 | // PRG RAM is default\r |
1000 | for (i = 0; i < M68K_FETCHBANK1; i++)\r |
1001 | PicoCpuFS68k.Fetch[i] = (unsigned int)Pico_mcd->prg_ram - (i<<(24-FAMEC_FETCHBITS));\r |
1002 | // real PRG RAM\r |
1003 | for (i = 0; i < M68K_FETCHBANK1 && (i<<(24-FAMEC_FETCHBITS)) < 0x80000; i++)\r |
1004 | PicoCpuFS68k.Fetch[i] = (unsigned int)Pico_mcd->prg_ram;\r |
1005 | // WORD RAM 2M area\r |
1006 | for (i = M68K_FETCHBANK1*0x08/0x100; i < M68K_FETCHBANK1 && (i<<(24-FAMEC_FETCHBITS)) < 0xc0000; i++)\r |
1007 | PicoCpuFS68k.Fetch[i] = (unsigned int)Pico_mcd->word_ram2M - 0x80000;\r |
af37bca8 |
1008 | // PicoMemRemapCD() will setup word ram for both\r |
3aa1e148 |
1009 | }\r |
1010 | #endif\r |
9037e45d |
1011 | #ifdef EMU_M68K\r |
1012 | m68k_mem_setup_cd();\r |
1013 | #endif\r |
3aa1e148 |
1014 | \r |
7a1f6e45 |
1015 | // m68k_poll_addr = m68k_poll_cnt = 0;\r |
1016 | s68k_poll_adclk = s68k_poll_cnt = 0;\r |
b837b69b |
1017 | }\r |
1018 | \r |
1019 | \r |
cc68a136 |
1020 | #ifdef EMU_M68K\r |
af37bca8 |
1021 | u32 m68k_read8(u32 a);\r |
1022 | u32 m68k_read16(u32 a);\r |
1023 | u32 m68k_read32(u32 a);\r |
1024 | void m68k_write8(u32 a, u8 d);\r |
1025 | void m68k_write16(u32 a, u16 d);\r |
1026 | void m68k_write32(u32 a, u32 d);\r |
1027 | \r |
9037e45d |
1028 | static unsigned int PicoReadCD8w (unsigned int a) {\r |
af37bca8 |
1029 | return m68ki_cpu_p == &PicoCpuMS68k ? s68k_read8(a) : m68k_read8(a);\r |
cc68a136 |
1030 | }\r |
9037e45d |
1031 | static unsigned int PicoReadCD16w(unsigned int a) {\r |
af37bca8 |
1032 | return m68ki_cpu_p == &PicoCpuMS68k ? s68k_read16(a) : m68k_read16(a);\r |
cc68a136 |
1033 | }\r |
9037e45d |
1034 | static unsigned int PicoReadCD32w(unsigned int a) {\r |
af37bca8 |
1035 | return m68ki_cpu_p == &PicoCpuMS68k ? s68k_read32(a) : m68k_read32(a);\r |
cc68a136 |
1036 | }\r |
9037e45d |
1037 | static void PicoWriteCD8w (unsigned int a, unsigned char d) {\r |
af37bca8 |
1038 | if (m68ki_cpu_p == &PicoCpuMS68k) s68k_write8(a, d); else m68k_write8(a, d);\r |
cc68a136 |
1039 | }\r |
9037e45d |
1040 | static void PicoWriteCD16w(unsigned int a, unsigned short d) {\r |
af37bca8 |
1041 | if (m68ki_cpu_p == &PicoCpuMS68k) s68k_write16(a, d); else m68k_write16(a, d);\r |
cc68a136 |
1042 | }\r |
9037e45d |
1043 | static void PicoWriteCD32w(unsigned int a, unsigned int d) {\r |
af37bca8 |
1044 | if (m68ki_cpu_p == &PicoCpuMS68k) s68k_write32(a, d); else m68k_write32(a, d);\r |
cc68a136 |
1045 | }\r |
1046 | \r |
9037e45d |
1047 | extern unsigned int (*pm68k_read_memory_8) (unsigned int address);\r |
1048 | extern unsigned int (*pm68k_read_memory_16)(unsigned int address);\r |
1049 | extern unsigned int (*pm68k_read_memory_32)(unsigned int address);\r |
1050 | extern void (*pm68k_write_memory_8) (unsigned int address, unsigned char value);\r |
1051 | extern void (*pm68k_write_memory_16)(unsigned int address, unsigned short value);\r |
1052 | extern void (*pm68k_write_memory_32)(unsigned int address, unsigned int value);\r |
9037e45d |
1053 | \r |
1054 | static void m68k_mem_setup_cd(void)\r |
1055 | {\r |
1056 | pm68k_read_memory_8 = PicoReadCD8w;\r |
1057 | pm68k_read_memory_16 = PicoReadCD16w;\r |
1058 | pm68k_read_memory_32 = PicoReadCD32w;\r |
1059 | pm68k_write_memory_8 = PicoWriteCD8w;\r |
1060 | pm68k_write_memory_16 = PicoWriteCD16w;\r |
1061 | pm68k_write_memory_32 = PicoWriteCD32w;\r |
9037e45d |
1062 | }\r |
cc68a136 |
1063 | #endif // EMU_M68K\r |
1064 | \r |