6cadc2da |
1 | // Memory I/O handlers for Sega/Mega CD.\r |
2 | // Loosely based on Gens code.\r |
3 | // (c) Copyright 2007, Grazvydas "notaz" Ignotas\r |
cc68a136 |
4 | \r |
5 | // A68K no longer supported here\r |
6 | \r |
7 | //#define __debug_io\r |
8 | \r |
9 | #include "../PicoInt.h"\r |
10 | \r |
11 | #include "../sound/sound.h"\r |
12 | #include "../sound/ym2612.h"\r |
13 | #include "../sound/sn76496.h"\r |
14 | \r |
cb4a513a |
15 | #include "gfx_cd.h"\r |
4f265db7 |
16 | #include "pcm.h"\r |
cb4a513a |
17 | \r |
cc68a136 |
18 | typedef unsigned char u8;\r |
19 | typedef unsigned short u16;\r |
20 | typedef unsigned int u32;\r |
21 | \r |
22 | //#define __debug_io\r |
23 | //#define __debug_io2\r |
66fdc0f0 |
24 | \r |
721cd396 |
25 | #define rdprintf dprintf\r |
26 | //#define rdprintf(...)\r |
68cba51e |
27 | //#define wrdprintf dprintf\r |
913ef4b7 |
28 | #define wrdprintf(...)\r |
721cd396 |
29 | #define plprintf dprintf\r |
30 | //#define plprintf(...)\r |
cc68a136 |
31 | \r |
32 | // -----------------------------------------------------------------\r |
33 | \r |
7a1f6e45 |
34 | // poller detection\r |
2433f409 |
35 | //#undef USE_POLL_DETECT\r |
7a1f6e45 |
36 | #define POLL_LIMIT 16\r |
37 | #define POLL_CYCLES 124\r |
38 | // int m68k_poll_addr, m68k_poll_cnt;\r |
39 | unsigned int s68k_poll_adclk, s68k_poll_cnt;\r |
cc68a136 |
40 | \r |
4ff2d527 |
41 | #ifndef _ASM_CD_MEMORY_C\r |
cb4a513a |
42 | static u32 m68k_reg_read16(u32 a)\r |
cc68a136 |
43 | {\r |
44 | u32 d=0;\r |
45 | a &= 0x3e;\r |
672ad671 |
46 | // dprintf("m68k_regs r%2i: [%02x] @%06x", realsize&~1, a+(realsize&1), SekPc);\r |
cc68a136 |
47 | \r |
48 | switch (a) {\r |
672ad671 |
49 | case 0:\r |
c459aefd |
50 | d = ((Pico_mcd->s68k_regs[0x33]<<13)&0x8000) | Pico_mcd->m.busreq; // here IFL2 is always 0, just like in Gens\r |
672ad671 |
51 | goto end;\r |
cc68a136 |
52 | case 2:\r |
672ad671 |
53 | d = (Pico_mcd->s68k_regs[a]<<8) | (Pico_mcd->s68k_regs[a+1]&0xc7);\r |
c008977e |
54 | // the DMNA delay must only be visible on s68k side (Lunar2, Silpheed)\r |
55 | if (Pico_mcd->m.state_flags&2) { d &= ~1; d |= 2; }\r |
56 | //printf("m68k_regs r3: %02x @%06x\n", (u8)d, SekPc);\r |
cc68a136 |
57 | goto end;\r |
c459aefd |
58 | case 4:\r |
59 | d = Pico_mcd->s68k_regs[4]<<8;\r |
60 | goto end;\r |
61 | case 6:\r |
913ef4b7 |
62 | d = *(u16 *)(Pico_mcd->bios + 0x72);\r |
c459aefd |
63 | goto end;\r |
cc68a136 |
64 | case 8:\r |
cc68a136 |
65 | d = Read_CDC_Host(0);\r |
66 | goto end;\r |
c459aefd |
67 | case 0xA:\r |
fa1e5e29 |
68 | dprintf("m68k FIXME: reserved read");\r |
c459aefd |
69 | goto end;\r |
cc68a136 |
70 | case 0xC:\r |
1cd356a3 |
71 | d = Pico_mcd->m.timer_stopwatch >> 16;\r |
4ff2d527 |
72 | dprintf("m68k stopwatch timer read (%04x)", d);\r |
1cd356a3 |
73 | goto end;\r |
cc68a136 |
74 | }\r |
75 | \r |
cc68a136 |
76 | if (a < 0x30) {\r |
77 | // comm flag/cmd/status (0xE-0x2F)\r |
78 | d = (Pico_mcd->s68k_regs[a]<<8) | Pico_mcd->s68k_regs[a+1];\r |
79 | goto end;\r |
80 | }\r |
81 | \r |
fa1e5e29 |
82 | dprintf("m68k_regs FIXME invalid read @ %02x", a);\r |
cc68a136 |
83 | \r |
84 | end:\r |
85 | \r |
672ad671 |
86 | // dprintf("ret = %04x", d);\r |
cc68a136 |
87 | return d;\r |
88 | }\r |
4ff2d527 |
89 | #endif\r |
cc68a136 |
90 | \r |
4ff2d527 |
91 | #ifndef _ASM_CD_MEMORY_C\r |
92 | static\r |
93 | #endif\r |
94 | void m68k_reg_write8(u32 a, u32 d)\r |
cc68a136 |
95 | {\r |
96 | a &= 0x3f;\r |
672ad671 |
97 | // dprintf("m68k_regs w%2i: [%02x] %02x @%06x", realsize, a, d, SekPc);\r |
cc68a136 |
98 | \r |
99 | switch (a) {\r |
100 | case 0:\r |
672ad671 |
101 | d &= 1;\r |
cc68a136 |
102 | if ((d&1) && (Pico_mcd->s68k_regs[0x33]&(1<<2))) { dprintf("m68k: s68k irq 2"); SekInterruptS68k(2); }\r |
c459aefd |
103 | return;\r |
cc68a136 |
104 | case 1:\r |
672ad671 |
105 | d &= 3;\r |
51a902ae |
106 | if (!(d&1)) Pico_mcd->m.state_flags |= 1; // reset pending, needed to be sure we fetch the right vectors on reset\r |
c459aefd |
107 | if ( (Pico_mcd->m.busreq&1) != (d&1)) dprintf("m68k: s68k reset %i", !(d&1));\r |
108 | if ( (Pico_mcd->m.busreq&2) != (d&2)) dprintf("m68k: s68k brq %i", (d&2)>>1);\r |
51a902ae |
109 | if ((Pico_mcd->m.state_flags&1) && (d&3)==1) {\r |
cc68a136 |
110 | SekResetS68k(); // S68k comes out of RESET or BRQ state\r |
4ff2d527 |
111 | Pico_mcd->m.state_flags&=~1;\r |
112 | dprintf("m68k: resetting s68k, cycles=%i", SekCyclesLeft);\r |
cc68a136 |
113 | }\r |
c459aefd |
114 | Pico_mcd->m.busreq = d;\r |
115 | return;\r |
672ad671 |
116 | case 2:\r |
721cd396 |
117 | dprintf("m68k: prg wp=%02x", d);\r |
672ad671 |
118 | Pico_mcd->s68k_regs[2] = d; // really use s68k side register\r |
119 | return;\r |
66fdc0f0 |
120 | case 3: {\r |
121 | u32 dold = Pico_mcd->s68k_regs[3]&0x1f;\r |
c008977e |
122 | //printf("m68k_regs w3: %02x @%06x\n", (u8)d, SekPc);\r |
672ad671 |
123 | d &= 0xc2;\r |
66fdc0f0 |
124 | if ((dold>>6) != ((d>>6)&3))\r |
672ad671 |
125 | dprintf("m68k: prg bank: %i -> %i", (Pico_mcd->s68k_regs[a]>>6), ((d>>6)&3));\r |
126 | //if ((Pico_mcd->s68k_regs[3]&4) != (d&4)) dprintf("m68k: ram mode %i mbit", (d&4) ? 1 : 2);\r |
127 | //if ((Pico_mcd->s68k_regs[3]&2) != (d&2)) dprintf("m68k: %s", (d&4) ? ((d&2) ? "word swap req" : "noop?") :\r |
128 | // ((d&2) ? "word ram to s68k" : "word ram to m68k"));\r |
66fdc0f0 |
129 | if (dold & 4) {\r |
130 | d ^= 2; // writing 0 to DMNA actually sets it, 1 does nothing\r |
131 | } else {\r |
132 | //dold &= ~2; // ??\r |
89fa852d |
133 | #if 1\r |
134 | if ((d & 2) && !(dold & 2)) {\r |
135 | Pico_mcd->m.state_flags |= 2; // we must delay setting DMNA bit (needed for Silpheed)\r |
136 | d &= ~2;\r |
137 | }\r |
138 | #else\r |
66fdc0f0 |
139 | if (d & 2) dold &= ~1; // return word RAM to s68k in 2M mode\r |
89fa852d |
140 | #endif\r |
66fdc0f0 |
141 | }\r |
142 | Pico_mcd->s68k_regs[3] = d | dold; // really use s68k side register\r |
7a1f6e45 |
143 | #ifdef USE_POLL_DETECT\r |
144 | if ((s68k_poll_adclk&0xfe) == 2 && s68k_poll_cnt > POLL_LIMIT) {\r |
145 | SekSetStopS68k(0); s68k_poll_adclk = 0;\r |
2433f409 |
146 | plprintf("s68k poll release, a=%02x\n", a);\r |
7a1f6e45 |
147 | }\r |
148 | #endif\r |
672ad671 |
149 | return;\r |
66fdc0f0 |
150 | }\r |
c459aefd |
151 | case 6:\r |
d1df8786 |
152 | Pico_mcd->bios[0x72 + 1] = d; // simple hint vector changer\r |
c459aefd |
153 | return;\r |
154 | case 7:\r |
d1df8786 |
155 | Pico_mcd->bios[0x72] = d;\r |
913ef4b7 |
156 | dprintf("hint vector set to %08x", PicoRead32(0x70));\r |
c459aefd |
157 | return;\r |
7a1f6e45 |
158 | case 0xf:\r |
159 | d = (d << 1) | ((d >> 7) & 1); // rol8 1 (special case)\r |
cc68a136 |
160 | case 0xe:\r |
672ad671 |
161 | //dprintf("m68k: comm flag: %02x", d);\r |
cc68a136 |
162 | Pico_mcd->s68k_regs[0xe] = d;\r |
7a1f6e45 |
163 | #ifdef USE_POLL_DETECT\r |
164 | if ((s68k_poll_adclk&0xfe) == 0xe && s68k_poll_cnt > POLL_LIMIT) {\r |
165 | SekSetStopS68k(0); s68k_poll_adclk = 0;\r |
2433f409 |
166 | plprintf("s68k poll release, a=%02x\n", a);\r |
7a1f6e45 |
167 | }\r |
168 | #endif\r |
c459aefd |
169 | return;\r |
672ad671 |
170 | }\r |
171 | \r |
172 | if ((a&0xf0) == 0x10) {\r |
cc68a136 |
173 | Pico_mcd->s68k_regs[a] = d;\r |
7a1f6e45 |
174 | #ifdef USE_POLL_DETECT\r |
175 | if ((a&0xfe) == (s68k_poll_adclk&0xfe) && s68k_poll_cnt > POLL_LIMIT) {\r |
176 | SekSetStopS68k(0); s68k_poll_adclk = 0;\r |
2433f409 |
177 | plprintf("s68k poll release, a=%02x\n", a);\r |
7a1f6e45 |
178 | }\r |
179 | #endif\r |
672ad671 |
180 | return;\r |
cc68a136 |
181 | }\r |
182 | \r |
fa1e5e29 |
183 | dprintf("m68k FIXME: invalid write? [%02x] %02x", a, d);\r |
cc68a136 |
184 | }\r |
185 | \r |
2433f409 |
186 | #ifndef _ASM_CD_MEMORY_C\r |
187 | static\r |
188 | #endif\r |
189 | u32 s68k_poll_detect(u32 a, u32 d)\r |
190 | {\r |
191 | #ifdef USE_POLL_DETECT\r |
192 | // polling detection\r |
193 | if (a == (s68k_poll_adclk&0xff)) {\r |
194 | unsigned int clkdiff = SekCyclesDoneS68k() - (s68k_poll_adclk>>8);\r |
195 | if (clkdiff <= POLL_CYCLES) {\r |
196 | s68k_poll_cnt++;\r |
197 | //printf("-- diff: %u, cnt = %i\n", clkdiff, s68k_poll_cnt);\r |
198 | if (s68k_poll_cnt > POLL_LIMIT) {\r |
199 | SekSetStopS68k(1);\r |
200 | plprintf("s68k poll detected @ %06x, a=%02x\n", SekPcS68k, a);\r |
201 | }\r |
202 | s68k_poll_adclk = (SekCyclesDoneS68k() << 8) | a;\r |
203 | return d;\r |
204 | }\r |
205 | }\r |
206 | s68k_poll_adclk = (SekCyclesDoneS68k() << 8) | a;\r |
207 | s68k_poll_cnt = 0;\r |
208 | #endif\r |
209 | return d;\r |
210 | }\r |
cc68a136 |
211 | \r |
913ef4b7 |
212 | #define READ_FONT_DATA(basemask) \\r |
213 | { \\r |
214 | unsigned int fnt = *(unsigned int *)(Pico_mcd->s68k_regs + 0x4c); \\r |
215 | unsigned int col0 = (fnt >> 8) & 0x0f, col1 = (fnt >> 12) & 0x0f; \\r |
216 | if (fnt & (basemask << 0)) d = col1 ; else d = col0; \\r |
217 | if (fnt & (basemask << 1)) d |= col1 << 4; else d |= col0 << 4; \\r |
218 | if (fnt & (basemask << 2)) d |= col1 << 8; else d |= col0 << 8; \\r |
219 | if (fnt & (basemask << 3)) d |= col1 << 12; else d |= col0 << 12; \\r |
220 | }\r |
221 | \r |
cc68a136 |
222 | \r |
4ff2d527 |
223 | #ifndef _ASM_CD_MEMORY_C\r |
224 | static\r |
225 | #endif\r |
226 | u32 s68k_reg_read16(u32 a)\r |
cc68a136 |
227 | {\r |
228 | u32 d=0;\r |
cc68a136 |
229 | \r |
672ad671 |
230 | // dprintf("s68k_regs r%2i: [%02x] @ %06x", realsize&~1, a+(realsize&1), SekPcS68k);\r |
cc68a136 |
231 | \r |
232 | switch (a) {\r |
233 | case 0:\r |
7a1f6e45 |
234 | return ((Pico_mcd->s68k_regs[0]&3)<<8) | 1; // ver = 0, not in reset state\r |
672ad671 |
235 | case 2:\r |
2433f409 |
236 | d = (Pico_mcd->s68k_regs[2]<<8) | (Pico_mcd->s68k_regs[3]&0x1f);\r |
c008977e |
237 | //printf("s68k_regs r3: %02x @%06x\n", (u8)d, SekPcS68k);\r |
2433f409 |
238 | return s68k_poll_detect(a, d);\r |
cc68a136 |
239 | case 6:\r |
7a1f6e45 |
240 | return CDC_Read_Reg();\r |
cc68a136 |
241 | case 8:\r |
7a1f6e45 |
242 | return Read_CDC_Host(1); // Gens returns 0 here on byte reads\r |
cc68a136 |
243 | case 0xC:\r |
4f265db7 |
244 | d = Pico_mcd->m.timer_stopwatch >> 16;\r |
4ff2d527 |
245 | dprintf("s68k stopwatch timer read (%04x)", d);\r |
7a1f6e45 |
246 | return d;\r |
d1df8786 |
247 | case 0x30:\r |
7a1f6e45 |
248 | dprintf("s68k int3 timer read (%02x)", Pico_mcd->s68k_regs[31]);\r |
249 | return Pico_mcd->s68k_regs[31];\r |
cc68a136 |
250 | case 0x34: // fader\r |
7a1f6e45 |
251 | return 0; // no busy bit\r |
913ef4b7 |
252 | case 0x50: // font data (check: Lunar 2, Silpheed)\r |
253 | READ_FONT_DATA(0x00100000);\r |
7a1f6e45 |
254 | return d;\r |
913ef4b7 |
255 | case 0x52:\r |
256 | READ_FONT_DATA(0x00010000);\r |
7a1f6e45 |
257 | return d;\r |
913ef4b7 |
258 | case 0x54:\r |
259 | READ_FONT_DATA(0x10000000);\r |
7a1f6e45 |
260 | return d;\r |
913ef4b7 |
261 | case 0x56:\r |
262 | READ_FONT_DATA(0x01000000);\r |
7a1f6e45 |
263 | return d;\r |
cc68a136 |
264 | }\r |
265 | \r |
266 | d = (Pico_mcd->s68k_regs[a]<<8) | Pico_mcd->s68k_regs[a+1];\r |
267 | \r |
2433f409 |
268 | if (a >= 0x0e && a < 0x30)\r |
269 | return s68k_poll_detect(a, d);\r |
7a1f6e45 |
270 | \r |
cc68a136 |
271 | return d;\r |
272 | }\r |
273 | \r |
4ff2d527 |
274 | #ifndef _ASM_CD_MEMORY_C\r |
275 | static\r |
276 | #endif\r |
277 | void s68k_reg_write8(u32 a, u32 d)\r |
cc68a136 |
278 | {\r |
672ad671 |
279 | //dprintf("s68k_regs w%2i: [%02x] %02x @ %06x", realsize, a, d, SekPcS68k);\r |
cc68a136 |
280 | \r |
281 | // TODO: review against Gens\r |
48e8482f |
282 | // Warning: d might have upper bits set\r |
cc68a136 |
283 | switch (a) {\r |
672ad671 |
284 | case 2:\r |
285 | return; // only m68k can change WP\r |
fa1e5e29 |
286 | case 3: {\r |
287 | int dold = Pico_mcd->s68k_regs[3];\r |
c008977e |
288 | //printf("s68k_regs w3: %02x @%06x\n", (u8)d, SekPcS68k);\r |
672ad671 |
289 | d &= 0x1d;\r |
4ff2d527 |
290 | d |= dold&0xc2;\r |
d0d47c5b |
291 | if (d&4) {\r |
4ff2d527 |
292 | if ((d ^ dold) & 5) {\r |
293 | d &= ~2; // in case of mode or bank change we clear DMNA (m68k req) bit\r |
294 | #ifdef _ASM_CD_MEMORY_C\r |
295 | PicoMemResetCD(d);\r |
296 | #endif\r |
297 | }\r |
48e8482f |
298 | #ifdef _ASM_CD_MEMORY_C\r |
299 | if ((d ^ dold) & 0x1d)\r |
300 | PicoMemResetCDdecode(d);\r |
301 | #endif\r |
fa1e5e29 |
302 | if (!(dold & 4)) {\r |
303 | dprintf("wram mode 2M->1M");\r |
304 | wram_2M_to_1M(Pico_mcd->word_ram2M);\r |
4ff2d527 |
305 | }\r |
d0d47c5b |
306 | } else {\r |
fa1e5e29 |
307 | if (dold & 4) {\r |
308 | dprintf("wram mode 1M->2M");\r |
4ff2d527 |
309 | if (!(d&1)) { // it didn't set the ret bit, which means it doesn't want to give WRAM to m68k\r |
310 | d &= ~3;\r |
311 | d |= (dold&1) ? 2 : 1; // then give it to the one which had bank0 in 1M mode\r |
312 | }\r |
fa1e5e29 |
313 | wram_1M_to_2M(Pico_mcd->word_ram2M);\r |
4ff2d527 |
314 | #ifdef _ASM_CD_MEMORY_C\r |
315 | PicoMemResetCD(d);\r |
316 | #endif\r |
317 | }\r |
318 | else\r |
319 | d |= dold&1;\r |
320 | if (d&1) d &= ~2; // return word RAM to m68k in 2M mode\r |
d0d47c5b |
321 | }\r |
672ad671 |
322 | break;\r |
fa1e5e29 |
323 | }\r |
cc68a136 |
324 | case 4:\r |
325 | dprintf("s68k CDC dest: %x", d&7);\r |
326 | Pico_mcd->s68k_regs[4] = (Pico_mcd->s68k_regs[4]&0xC0) | (d&7); // CDC mode\r |
327 | return;\r |
328 | case 5:\r |
c459aefd |
329 | //dprintf("s68k CDC reg addr: %x", d&0xf);\r |
cc68a136 |
330 | break;\r |
331 | case 7:\r |
332 | CDC_Write_Reg(d);\r |
333 | return;\r |
334 | case 0xa:\r |
335 | dprintf("s68k set CDC dma addr");\r |
336 | break;\r |
d1df8786 |
337 | case 0xc:\r |
4f265db7 |
338 | case 0xd:\r |
d1df8786 |
339 | dprintf("s68k set stopwatch timer");\r |
4f265db7 |
340 | Pico_mcd->m.timer_stopwatch = 0;\r |
341 | return;\r |
1cd356a3 |
342 | case 0xe:\r |
7a1f6e45 |
343 | Pico_mcd->s68k_regs[0xf] = (d>>1) | (d<<7); // ror8 1, Gens note: Dragons lair\r |
1cd356a3 |
344 | return;\r |
d1df8786 |
345 | case 0x31:\r |
4f265db7 |
346 | dprintf("s68k set int3 timer: %02x", d);\r |
48e8482f |
347 | Pico_mcd->m.timer_int3 = (d & 0xff) << 16;\r |
d1df8786 |
348 | break;\r |
cc68a136 |
349 | case 0x33: // IRQ mask\r |
350 | dprintf("s68k irq mask: %02x", d);\r |
351 | if ((d&(1<<4)) && (Pico_mcd->s68k_regs[0x37]&4) && !(Pico_mcd->s68k_regs[0x33]&(1<<4))) {\r |
352 | CDD_Export_Status();\r |
cc68a136 |
353 | }\r |
354 | break;\r |
355 | case 0x34: // fader\r |
356 | Pico_mcd->s68k_regs[a] = (u8) d & 0x7f;\r |
357 | return;\r |
672ad671 |
358 | case 0x36:\r |
359 | return; // d/m bit is unsetable\r |
360 | case 0x37: {\r |
361 | u32 d_old = Pico_mcd->s68k_regs[0x37];\r |
362 | Pico_mcd->s68k_regs[0x37] = d&7;\r |
363 | if ((d&4) && !(d_old&4)) {\r |
cc68a136 |
364 | CDD_Export_Status();\r |
cc68a136 |
365 | }\r |
672ad671 |
366 | return;\r |
367 | }\r |
cc68a136 |
368 | case 0x4b:\r |
369 | Pico_mcd->s68k_regs[a] = (u8) d;\r |
370 | CDD_Import_Command();\r |
371 | return;\r |
372 | }\r |
373 | \r |
1cd356a3 |
374 | if ((a&0x1f0) == 0x10 || (a >= 0x38 && a < 0x42))\r |
cc68a136 |
375 | {\r |
fa1e5e29 |
376 | dprintf("s68k FIXME: invalid write @ %02x?", a);\r |
cc68a136 |
377 | return;\r |
378 | }\r |
379 | \r |
380 | Pico_mcd->s68k_regs[a] = (u8) d;\r |
381 | }\r |
382 | \r |
383 | \r |
4ff2d527 |
384 | #ifndef _ASM_CD_MEMORY_C\r |
fa1e5e29 |
385 | static u32 OtherRead16End(u32 a, int realsize)\r |
cc68a136 |
386 | {\r |
387 | u32 d=0;\r |
388 | \r |
672ad671 |
389 | if ((a&0xffffc0)==0xa12000) {\r |
cb4a513a |
390 | d=m68k_reg_read16(a);\r |
672ad671 |
391 | goto end;\r |
392 | }\r |
cc68a136 |
393 | \r |
fa1e5e29 |
394 | dprintf("m68k FIXME: unusual r%i: %06x @%06x", realsize&~1, (a&0xfffffe)+(realsize&1), SekPc);\r |
cc68a136 |
395 | \r |
396 | end:\r |
397 | return d;\r |
398 | }\r |
399 | \r |
cc68a136 |
400 | \r |
fa1e5e29 |
401 | static void OtherWrite8End(u32 a, u32 d, int realsize)\r |
cc68a136 |
402 | {\r |
cb4a513a |
403 | if ((a&0xffffc0)==0xa12000) { m68k_reg_write8(a, d); return; }\r |
cc68a136 |
404 | \r |
721cd396 |
405 | dprintf("m68k FIXME: strange w%i: [%06x], %08x @%06x", realsize, a&0xffffff, d, SekPc);\r |
cc68a136 |
406 | }\r |
407 | \r |
cc68a136 |
408 | \r |
fa1e5e29 |
409 | #undef _ASM_MEMORY_C\r |
410 | #include "../MemoryCmn.c"\r |
4ff2d527 |
411 | #include "cell_map.c"\r |
412 | #endif // !def _ASM_CD_MEMORY_C\r |
cc68a136 |
413 | \r |
2433f409 |
414 | \r |
cc68a136 |
415 | // -----------------------------------------------------------------\r |
416 | // Read Rom and read Ram\r |
417 | \r |
4ff2d527 |
418 | //u8 PicoReadM68k8_(u32 a);\r |
419 | #ifdef _ASM_CD_MEMORY_C\r |
420 | u8 PicoReadM68k8(u32 a);\r |
421 | #else\r |
422 | static u8 PicoReadM68k8(u32 a)\r |
cc68a136 |
423 | {\r |
424 | u32 d=0;\r |
425 | \r |
426 | if ((a&0xe00000)==0xe00000) { d = *(u8 *)(Pico.ram+((a^1)&0xffff)); goto end; } // Ram\r |
427 | \r |
428 | a&=0xffffff;\r |
429 | \r |
430 | if (a < 0x20000) { d = *(u8 *)(Pico_mcd->bios+(a^1)); goto end; } // bios\r |
431 | \r |
432 | // prg RAM\r |
721cd396 |
433 | if ((a&0xfe0000)==0x020000 && (Pico_mcd->m.busreq&3)!=1) {\r |
672ad671 |
434 | u8 *prg_bank = Pico_mcd->prg_ram_b[Pico_mcd->s68k_regs[3]>>6];\r |
cc68a136 |
435 | d = *(prg_bank+((a^1)&0x1ffff));\r |
436 | goto end;\r |
437 | }\r |
438 | \r |
d0d47c5b |
439 | // word RAM\r |
440 | if ((a&0xfc0000)==0x200000) {\r |
913ef4b7 |
441 | wrdprintf("m68k_wram r8: [%06x] @%06x", a, SekPc);\r |
d0d47c5b |
442 | if (Pico_mcd->s68k_regs[3]&4) { // 1M mode?\r |
fa1e5e29 |
443 | int bank = Pico_mcd->s68k_regs[3]&1;\r |
444 | if (a >= 0x220000)\r |
445 | a = (a&3) | (cell_map(a >> 2) << 2); // cell arranged\r |
446 | else a &= 0x1ffff;\r |
447 | d = Pico_mcd->word_ram1M[bank][a^1];\r |
d0d47c5b |
448 | } else {\r |
449 | // allow access in any mode, like Gens does\r |
fa1e5e29 |
450 | d = Pico_mcd->word_ram2M[(a^1)&0x3ffff];\r |
d0d47c5b |
451 | }\r |
913ef4b7 |
452 | wrdprintf("ret = %02x", (u8)d);\r |
d0d47c5b |
453 | goto end;\r |
454 | }\r |
455 | \r |
cc68a136 |
456 | if ((a&0xff4000)==0xa00000) { d=z80Read8(a); goto end; } // Z80 Ram\r |
457 | \r |
c459aefd |
458 | if ((a&0xffffc0)==0xa12000)\r |
459 | rdprintf("m68k_regs r8: [%02x] @%06x", a&0x3f, SekPc);\r |
672ad671 |
460 | \r |
cc68a136 |
461 | d=OtherRead16(a&~1, 8|(a&1)); if ((a&1)==0) d>>=8;\r |
462 | \r |
c459aefd |
463 | if ((a&0xffffc0)==0xa12000)\r |
464 | rdprintf("ret = %02x", (u8)d);\r |
672ad671 |
465 | \r |
cc68a136 |
466 | end:\r |
467 | \r |
468 | #ifdef __debug_io\r |
469 | dprintf("r8 : %06x, %02x @%06x", a&0xffffff, (u8)d, SekPc);\r |
470 | #endif\r |
471 | return (u8)d;\r |
472 | }\r |
4ff2d527 |
473 | #endif\r |
cc68a136 |
474 | \r |
ab0607f7 |
475 | \r |
4ff2d527 |
476 | #ifdef _ASM_CD_MEMORY_C\r |
477 | u16 PicoReadM68k16(u32 a);\r |
478 | #else\r |
479 | static u16 PicoReadM68k16(u32 a)\r |
cc68a136 |
480 | {\r |
481 | u16 d=0;\r |
482 | \r |
483 | if ((a&0xe00000)==0xe00000) { d=*(u16 *)(Pico.ram+(a&0xfffe)); goto end; } // Ram\r |
484 | \r |
485 | a&=0xfffffe;\r |
486 | \r |
487 | if (a < 0x20000) { d = *(u16 *)(Pico_mcd->bios+a); goto end; } // bios\r |
488 | \r |
489 | // prg RAM\r |
721cd396 |
490 | if ((a&0xfe0000)==0x020000 && (Pico_mcd->m.busreq&3)!=1) {\r |
672ad671 |
491 | u8 *prg_bank = Pico_mcd->prg_ram_b[Pico_mcd->s68k_regs[3]>>6];\r |
c008977e |
492 | wrdprintf("m68k_prgram r16: [%i,%06x] @%06x", Pico_mcd->s68k_regs[3]>>6, a, SekPc);\r |
cc68a136 |
493 | d = *(u16 *)(prg_bank+(a&0x1fffe));\r |
c008977e |
494 | wrdprintf("ret = %04x", d);\r |
cc68a136 |
495 | goto end;\r |
496 | }\r |
497 | \r |
d0d47c5b |
498 | // word RAM\r |
499 | if ((a&0xfc0000)==0x200000) {\r |
913ef4b7 |
500 | wrdprintf("m68k_wram r16: [%06x] @%06x", a, SekPc);\r |
d0d47c5b |
501 | if (Pico_mcd->s68k_regs[3]&4) { // 1M mode?\r |
fa1e5e29 |
502 | int bank = Pico_mcd->s68k_regs[3]&1;\r |
503 | if (a >= 0x220000)\r |
504 | a = (a&2) | (cell_map(a >> 2) << 2); // cell arranged\r |
505 | else a &= 0x1fffe;\r |
506 | d = *(u16 *)(Pico_mcd->word_ram1M[bank]+a);\r |
d0d47c5b |
507 | } else {\r |
508 | // allow access in any mode, like Gens does\r |
fa1e5e29 |
509 | d = *(u16 *)(Pico_mcd->word_ram2M+(a&0x3fffe));\r |
d0d47c5b |
510 | }\r |
913ef4b7 |
511 | wrdprintf("ret = %04x", d);\r |
d0d47c5b |
512 | goto end;\r |
513 | }\r |
514 | \r |
c459aefd |
515 | if ((a&0xffffc0)==0xa12000)\r |
516 | rdprintf("m68k_regs r16: [%02x] @%06x", a&0x3f, SekPc);\r |
672ad671 |
517 | \r |
cc68a136 |
518 | d = (u16)OtherRead16(a, 16);\r |
519 | \r |
c459aefd |
520 | if ((a&0xffffc0)==0xa12000)\r |
521 | rdprintf("ret = %04x", d);\r |
672ad671 |
522 | \r |
cc68a136 |
523 | end:\r |
524 | \r |
525 | #ifdef __debug_io\r |
526 | dprintf("r16: %06x, %04x @%06x", a&0xffffff, d, SekPc);\r |
527 | #endif\r |
528 | return d;\r |
529 | }\r |
4ff2d527 |
530 | #endif\r |
cc68a136 |
531 | \r |
ab0607f7 |
532 | \r |
4ff2d527 |
533 | #ifdef _ASM_CD_MEMORY_C\r |
534 | u32 PicoReadM68k32(u32 a);\r |
535 | #else\r |
536 | static u32 PicoReadM68k32(u32 a)\r |
cc68a136 |
537 | {\r |
538 | u32 d=0;\r |
539 | \r |
540 | if ((a&0xe00000)==0xe00000) { u16 *pm=(u16 *)(Pico.ram+(a&0xfffe)); d = (pm[0]<<16)|pm[1]; goto end; } // Ram\r |
541 | \r |
542 | a&=0xfffffe;\r |
543 | \r |
544 | if (a < 0x20000) { u16 *pm=(u16 *)(Pico_mcd->bios+a); d = (pm[0]<<16)|pm[1]; goto end; } // bios\r |
545 | \r |
546 | // prg RAM\r |
721cd396 |
547 | if ((a&0xfe0000)==0x020000 && (Pico_mcd->m.busreq&3)!=1) {\r |
672ad671 |
548 | u8 *prg_bank = Pico_mcd->prg_ram_b[Pico_mcd->s68k_regs[3]>>6];\r |
cc68a136 |
549 | u16 *pm=(u16 *)(prg_bank+(a&0x1fffe));\r |
550 | d = (pm[0]<<16)|pm[1];\r |
551 | goto end;\r |
552 | }\r |
553 | \r |
d0d47c5b |
554 | // word RAM\r |
555 | if ((a&0xfc0000)==0x200000) {\r |
913ef4b7 |
556 | wrdprintf("m68k_wram r32: [%06x] @%06x", a, SekPc);\r |
d0d47c5b |
557 | if (Pico_mcd->s68k_regs[3]&4) { // 1M mode?\r |
fa1e5e29 |
558 | int bank = Pico_mcd->s68k_regs[3]&1;\r |
559 | if (a >= 0x220000) { // cell arranged\r |
560 | u32 a1, a2;\r |
561 | a1 = (a&2) | (cell_map(a >> 2) << 2);\r |
4ff2d527 |
562 | if (a&2) a2 = cell_map((a+2) >> 2) << 2;\r |
563 | else a2 = a1 + 2;\r |
564 | d = *(u16 *)(Pico_mcd->word_ram1M[bank]+a1) << 16;\r |
565 | d |= *(u16 *)(Pico_mcd->word_ram1M[bank]+a2);\r |
bf098bc5 |
566 | } else {\r |
fa1e5e29 |
567 | u16 *pm=(u16 *)(Pico_mcd->word_ram1M[bank]+(a&0x1fffe)); d = (pm[0]<<16)|pm[1];\r |
bf098bc5 |
568 | }\r |
d0d47c5b |
569 | } else {\r |
570 | // allow access in any mode, like Gens does\r |
fa1e5e29 |
571 | u16 *pm=(u16 *)(Pico_mcd->word_ram2M+(a&0x3fffe)); d = (pm[0]<<16)|pm[1];\r |
d0d47c5b |
572 | }\r |
913ef4b7 |
573 | wrdprintf("ret = %08x", d);\r |
d0d47c5b |
574 | goto end;\r |
575 | }\r |
576 | \r |
c459aefd |
577 | if ((a&0xffffc0)==0xa12000)\r |
578 | rdprintf("m68k_regs r32: [%02x] @%06x", a&0x3f, SekPc);\r |
672ad671 |
579 | \r |
cc68a136 |
580 | d = (OtherRead16(a, 32)<<16)|OtherRead16(a+2, 32);\r |
581 | \r |
c459aefd |
582 | if ((a&0xffffc0)==0xa12000)\r |
583 | rdprintf("ret = %08x", d);\r |
672ad671 |
584 | \r |
cc68a136 |
585 | end:\r |
586 | #ifdef __debug_io\r |
587 | dprintf("r32: %06x, %08x @%06x", a&0xffffff, d, SekPc);\r |
588 | #endif\r |
589 | return d;\r |
590 | }\r |
4ff2d527 |
591 | #endif\r |
cc68a136 |
592 | \r |
ab0607f7 |
593 | \r |
cc68a136 |
594 | // -----------------------------------------------------------------\r |
cc68a136 |
595 | \r |
4ff2d527 |
596 | #ifdef _ASM_CD_MEMORY_C\r |
597 | void PicoWriteM68k8(u32 a,u8 d);\r |
598 | #else\r |
599 | static void PicoWriteM68k8(u32 a,u8 d)\r |
cc68a136 |
600 | {\r |
601 | #ifdef __debug_io\r |
602 | dprintf("w8 : %06x, %02x @%06x", a&0xffffff, d, SekPc);\r |
603 | #endif\r |
604 | //if ((a&0xe0ffff)==0xe0a9ba+0x69c)\r |
605 | // dprintf("w8 : %06x, %02x @%06x", a&0xffffff, d, SekPc);\r |
606 | \r |
607 | \r |
ab0607f7 |
608 | if ((a&0xe00000)==0xe00000) { // Ram\r |
609 | *(u8 *)(Pico.ram+((a^1)&0xffff)) = d;\r |
610 | return;\r |
611 | }\r |
cc68a136 |
612 | \r |
613 | a&=0xffffff;\r |
614 | \r |
615 | // prg RAM\r |
721cd396 |
616 | if ((a&0xfe0000)==0x020000 && (Pico_mcd->m.busreq&3)!=1) {\r |
672ad671 |
617 | u8 *prg_bank = Pico_mcd->prg_ram_b[Pico_mcd->s68k_regs[3]>>6];\r |
bf098bc5 |
618 | *(u8 *)(prg_bank+((a^1)&0x1ffff))=d;\r |
cc68a136 |
619 | return;\r |
620 | }\r |
621 | \r |
d0d47c5b |
622 | // word RAM\r |
623 | if ((a&0xfc0000)==0x200000) {\r |
913ef4b7 |
624 | wrdprintf("m68k_wram w8: [%06x] %02x @%06x", a, d, SekPc);\r |
d0d47c5b |
625 | if (Pico_mcd->s68k_regs[3]&4) { // 1M mode?\r |
fa1e5e29 |
626 | int bank = Pico_mcd->s68k_regs[3]&1;\r |
627 | if (a >= 0x220000)\r |
628 | a = (a&3) | (cell_map(a >> 2) << 2); // cell arranged\r |
629 | else a &= 0x1ffff;\r |
630 | *(u8 *)(Pico_mcd->word_ram1M[bank]+(a^1))=d;\r |
d0d47c5b |
631 | } else {\r |
632 | // allow access in any mode, like Gens does\r |
fa1e5e29 |
633 | *(u8 *)(Pico_mcd->word_ram2M+((a^1)&0x3ffff))=d;\r |
d0d47c5b |
634 | }\r |
635 | return;\r |
636 | }\r |
637 | \r |
2433f409 |
638 | if ((a&0xffffc0)==0xa12000) {\r |
c459aefd |
639 | rdprintf("m68k_regs w8: [%02x] %02x @%06x", a&0x3f, d, SekPc);\r |
2433f409 |
640 | m68k_reg_write8(a, d);\r |
641 | return;\r |
642 | }\r |
672ad671 |
643 | \r |
cc68a136 |
644 | OtherWrite8(a,d,8);\r |
645 | }\r |
4ff2d527 |
646 | #endif\r |
cc68a136 |
647 | \r |
ab0607f7 |
648 | \r |
4ff2d527 |
649 | #ifdef _ASM_CD_MEMORY_C\r |
650 | void PicoWriteM68k16(u32 a,u16 d);\r |
651 | #else\r |
652 | static void PicoWriteM68k16(u32 a,u16 d)\r |
cc68a136 |
653 | {\r |
654 | #ifdef __debug_io\r |
655 | dprintf("w16: %06x, %04x", a&0xffffff, d);\r |
656 | #endif\r |
cc68a136 |
657 | // dprintf("w16: %06x, %04x @%06x", a&0xffffff, d, SekPc);\r |
658 | \r |
ab0607f7 |
659 | if ((a&0xe00000)==0xe00000) { // Ram\r |
660 | *(u16 *)(Pico.ram+(a&0xfffe))=d;\r |
661 | return;\r |
662 | }\r |
cc68a136 |
663 | \r |
664 | a&=0xfffffe;\r |
665 | \r |
666 | // prg RAM\r |
721cd396 |
667 | if ((a&0xfe0000)==0x020000 && (Pico_mcd->m.busreq&3)!=1) {\r |
672ad671 |
668 | u8 *prg_bank = Pico_mcd->prg_ram_b[Pico_mcd->s68k_regs[3]>>6];\r |
c008977e |
669 | wrdprintf("m68k_prgram w16: [%i,%06x] %04x @%06x", Pico_mcd->s68k_regs[3]>>6, a, d, SekPc);\r |
cc68a136 |
670 | *(u16 *)(prg_bank+(a&0x1fffe))=d;\r |
671 | return;\r |
672 | }\r |
673 | \r |
d0d47c5b |
674 | // word RAM\r |
675 | if ((a&0xfc0000)==0x200000) {\r |
913ef4b7 |
676 | wrdprintf("m68k_wram w16: [%06x] %04x @%06x", a, d, SekPc);\r |
d0d47c5b |
677 | if (Pico_mcd->s68k_regs[3]&4) { // 1M mode?\r |
fa1e5e29 |
678 | int bank = Pico_mcd->s68k_regs[3]&1;\r |
679 | if (a >= 0x220000)\r |
680 | a = (a&2) | (cell_map(a >> 2) << 2); // cell arranged\r |
681 | else a &= 0x1fffe;\r |
682 | *(u16 *)(Pico_mcd->word_ram1M[bank]+a)=d;\r |
d0d47c5b |
683 | } else {\r |
684 | // allow access in any mode, like Gens does\r |
fa1e5e29 |
685 | *(u16 *)(Pico_mcd->word_ram2M+(a&0x3fffe))=d;\r |
d0d47c5b |
686 | }\r |
687 | return;\r |
688 | }\r |
689 | \r |
7a1f6e45 |
690 | // regs\r |
691 | if ((a&0xffffc0)==0xa12000) {\r |
c459aefd |
692 | rdprintf("m68k_regs w16: [%02x] %04x @%06x", a&0x3f, d, SekPc);\r |
7a1f6e45 |
693 | if (a == 0xe) { // special case, 2 byte writes would be handled differently\r |
694 | Pico_mcd->s68k_regs[0xe] = d >> 8;\r |
695 | #ifdef USE_POLL_DETECT\r |
696 | if ((s68k_poll_adclk&0xfe) == 0xe && s68k_poll_cnt > POLL_LIMIT) {\r |
6cadc2da |
697 | SekSetStopS68k(0); s68k_poll_adclk = 0;\r |
2433f409 |
698 | plprintf("s68k poll release, a=%02x\n", a);\r |
7a1f6e45 |
699 | }\r |
700 | #endif\r |
701 | return;\r |
702 | }\r |
703 | m68k_reg_write8(a, d>>8);\r |
704 | m68k_reg_write8(a+1,d&0xff);\r |
705 | return;\r |
706 | }\r |
cc68a136 |
707 | \r |
708 | OtherWrite16(a,d);\r |
709 | }\r |
4ff2d527 |
710 | #endif\r |
cc68a136 |
711 | \r |
ab0607f7 |
712 | \r |
4ff2d527 |
713 | #ifdef _ASM_CD_MEMORY_C\r |
714 | void PicoWriteM68k32(u32 a,u32 d);\r |
715 | #else\r |
716 | static void PicoWriteM68k32(u32 a,u32 d)\r |
cc68a136 |
717 | {\r |
718 | #ifdef __debug_io\r |
719 | dprintf("w32: %06x, %08x", a&0xffffff, d);\r |
720 | #endif\r |
721 | \r |
722 | if ((a&0xe00000)==0xe00000)\r |
723 | {\r |
724 | // Ram:\r |
725 | u16 *pm=(u16 *)(Pico.ram+(a&0xfffe));\r |
726 | pm[0]=(u16)(d>>16); pm[1]=(u16)d;\r |
727 | return;\r |
728 | }\r |
729 | \r |
730 | a&=0xfffffe;\r |
731 | \r |
732 | // prg RAM\r |
721cd396 |
733 | if ((a&0xfe0000)==0x020000 && (Pico_mcd->m.busreq&3)!=1) {\r |
672ad671 |
734 | u8 *prg_bank = Pico_mcd->prg_ram_b[Pico_mcd->s68k_regs[3]>>6];\r |
cc68a136 |
735 | u16 *pm=(u16 *)(prg_bank+(a&0x1fffe));\r |
736 | pm[0]=(u16)(d>>16); pm[1]=(u16)d;\r |
737 | return;\r |
738 | }\r |
739 | \r |
672ad671 |
740 | // word RAM\r |
d0d47c5b |
741 | if ((a&0xfc0000)==0x200000) {\r |
742 | if (d != 0) // don't log clears\r |
913ef4b7 |
743 | wrdprintf("m68k_wram w32: [%06x] %08x @%06x", a, d, SekPc);\r |
d0d47c5b |
744 | if (Pico_mcd->s68k_regs[3]&4) { // 1M mode?\r |
fa1e5e29 |
745 | int bank = Pico_mcd->s68k_regs[3]&1;\r |
746 | if (a >= 0x220000) { // cell arranged\r |
747 | u32 a1, a2;\r |
748 | a1 = (a&2) | (cell_map(a >> 2) << 2);\r |
4ff2d527 |
749 | if (a&2) a2 = cell_map((a+2) >> 2) << 2;\r |
750 | else a2 = a1 + 2;\r |
751 | *(u16 *)(Pico_mcd->word_ram1M[bank]+a1) = d >> 16;\r |
752 | *(u16 *)(Pico_mcd->word_ram1M[bank]+a2) = d;\r |
bf098bc5 |
753 | } else {\r |
fa1e5e29 |
754 | u16 *pm=(u16 *)(Pico_mcd->word_ram1M[bank]+(a&0x1fffe));\r |
755 | pm[0]=(u16)(d>>16); pm[1]=(u16)d;\r |
bf098bc5 |
756 | }\r |
d0d47c5b |
757 | } else {\r |
758 | // allow access in any mode, like Gens does\r |
fa1e5e29 |
759 | u16 *pm=(u16 *)(Pico_mcd->word_ram2M+(a&0x3fffe));\r |
d0d47c5b |
760 | pm[0]=(u16)(d>>16); pm[1]=(u16)d;\r |
761 | }\r |
672ad671 |
762 | return;\r |
d0d47c5b |
763 | }\r |
672ad671 |
764 | \r |
2433f409 |
765 | if ((a&0xffffc0)==0xa12000) {\r |
c459aefd |
766 | rdprintf("m68k_regs w32: [%02x] %08x @%06x", a&0x3f, d, SekPc);\r |
2433f409 |
767 | if ((a&0x3e) == 0xe) dprintf("m68k FIXME: w32 [%02x]", a&0x3f);\r |
768 | }\r |
cc68a136 |
769 | \r |
770 | OtherWrite16(a, (u16)(d>>16));\r |
771 | OtherWrite16(a+2,(u16)d);\r |
772 | }\r |
4ff2d527 |
773 | #endif\r |
cc68a136 |
774 | \r |
775 | \r |
721cd396 |
776 | // -----------------------------------------------------------------\r |
777 | // S68k\r |
cc68a136 |
778 | // -----------------------------------------------------------------\r |
779 | \r |
4ff2d527 |
780 | #ifdef _ASM_CD_MEMORY_C\r |
781 | u8 PicoReadS68k8(u32 a);\r |
782 | #else\r |
783 | static u8 PicoReadS68k8(u32 a)\r |
cc68a136 |
784 | {\r |
785 | u32 d=0;\r |
786 | \r |
787 | a&=0xffffff;\r |
788 | \r |
789 | // prg RAM\r |
790 | if (a < 0x80000) {\r |
791 | d = *(Pico_mcd->prg_ram+(a^1));\r |
792 | goto end;\r |
793 | }\r |
794 | \r |
795 | // regs\r |
796 | if ((a&0xfffe00) == 0xff8000) {\r |
cb4a513a |
797 | a &= 0x1ff;\r |
798 | rdprintf("s68k_regs r8: [%02x] @ %06x", a, SekPcS68k);\r |
2433f409 |
799 | if (a >= 0x0e && a < 0x30) {\r |
800 | d = Pico_mcd->s68k_regs[a];\r |
801 | s68k_poll_detect(a, d);\r |
802 | rdprintf("ret = %02x", (u8)d);\r |
803 | goto end;\r |
804 | }\r |
805 | else if (a >= 0x58 && a < 0x68)\r |
cb4a513a |
806 | d = gfx_cd_read(a&~1);\r |
807 | else d = s68k_reg_read16(a&~1);\r |
808 | if ((a&1)==0) d>>=8;\r |
c459aefd |
809 | rdprintf("ret = %02x", (u8)d);\r |
cc68a136 |
810 | goto end;\r |
811 | }\r |
812 | \r |
d0d47c5b |
813 | // word RAM (2M area)\r |
814 | if ((a&0xfc0000)==0x080000) { // 080000-0bffff\r |
fa1e5e29 |
815 | // test: batman returns\r |
913ef4b7 |
816 | wrdprintf("s68k_wram2M r8: [%06x] @%06x", a, SekPcS68k);\r |
fa1e5e29 |
817 | if (Pico_mcd->s68k_regs[3]&4) { // 1M decode mode?\r |
818 | int bank = !(Pico_mcd->s68k_regs[3]&1);\r |
819 | d = Pico_mcd->word_ram1M[bank][((a>>1)^1)&0x1ffff];\r |
820 | if (a&1) d &= 0x0f;\r |
821 | else d >>= 4;\r |
822 | dprintf("FIXME: decode");\r |
d0d47c5b |
823 | } else {\r |
824 | // allow access in any mode, like Gens does\r |
fa1e5e29 |
825 | d = Pico_mcd->word_ram2M[(a^1)&0x3ffff];\r |
d0d47c5b |
826 | }\r |
913ef4b7 |
827 | wrdprintf("ret = %02x", (u8)d);\r |
d0d47c5b |
828 | goto end;\r |
829 | }\r |
830 | \r |
831 | // word RAM (1M area)\r |
68cba51e |
832 | if ((a&0xfe0000)==0x0c0000 && (Pico_mcd->s68k_regs[3]&4)) { // 0c0000-0dffff\r |
fa1e5e29 |
833 | int bank;\r |
913ef4b7 |
834 | wrdprintf("s68k_wram1M r8: [%06x] @%06x", a, SekPcS68k);\r |
68cba51e |
835 | // if (!(Pico_mcd->s68k_regs[3]&4))\r |
836 | // dprintf("s68k_wram1M FIXME: wrong mode");\r |
fa1e5e29 |
837 | bank = !(Pico_mcd->s68k_regs[3]&1);\r |
838 | d = Pico_mcd->word_ram1M[bank][(a^1)&0x1ffff];\r |
913ef4b7 |
839 | wrdprintf("ret = %02x", (u8)d);\r |
d0d47c5b |
840 | goto end;\r |
841 | }\r |
842 | \r |
4f265db7 |
843 | // PCM\r |
844 | if ((a&0xff8000)==0xff0000) {\r |
1cd356a3 |
845 | dprintf("s68k_pcm r8: [%06x] @%06x", a, SekPcS68k);\r |
4f265db7 |
846 | a &= 0x7fff;\r |
847 | if (a >= 0x2000)\r |
848 | d = Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][(a>>1)&0xfff];\r |
849 | else if (a >= 0x20) {\r |
850 | a &= 0x1e;\r |
851 | d = Pico_mcd->pcm.ch[a>>2].addr >> PCM_STEP_SHIFT;\r |
852 | if (a & 2) d >>= 8;\r |
853 | }\r |
854 | dprintf("ret = %02x", (u8)d);\r |
855 | goto end;\r |
856 | }\r |
857 | \r |
ab0607f7 |
858 | // bram\r |
859 | if ((a&0xff0000)==0xfe0000) {\r |
860 | d = Pico_mcd->bram[(a>>1)&0x1fff];\r |
861 | goto end;\r |
862 | }\r |
863 | \r |
cc68a136 |
864 | dprintf("s68k r8 : %06x, %02x @%06x", a&0xffffff, (u8)d, SekPcS68k);\r |
865 | \r |
866 | end:\r |
867 | \r |
868 | #ifdef __debug_io2\r |
869 | dprintf("s68k r8 : %06x, %02x @%06x", a&0xffffff, (u8)d, SekPcS68k);\r |
870 | #endif\r |
871 | return (u8)d;\r |
872 | }\r |
4ff2d527 |
873 | #endif\r |
cc68a136 |
874 | \r |
ab0607f7 |
875 | \r |
4ff2d527 |
876 | //u16 PicoReadS68k16_(u32 a);\r |
877 | #ifdef _ASM_CD_MEMORY_C\r |
878 | u16 PicoReadS68k16(u32 a);\r |
879 | #else\r |
880 | static u16 PicoReadS68k16(u32 a)\r |
cc68a136 |
881 | {\r |
4f265db7 |
882 | u32 d=0;\r |
cc68a136 |
883 | \r |
884 | a&=0xfffffe;\r |
885 | \r |
886 | // prg RAM\r |
887 | if (a < 0x80000) {\r |
c008977e |
888 | wrdprintf("s68k_prgram r16: [%06x] @%06x", a, SekPcS68k);\r |
cc68a136 |
889 | d = *(u16 *)(Pico_mcd->prg_ram+a);\r |
c008977e |
890 | wrdprintf("ret = %04x", d);\r |
cc68a136 |
891 | goto end;\r |
892 | }\r |
893 | \r |
894 | // regs\r |
895 | if ((a&0xfffe00) == 0xff8000) {\r |
cb4a513a |
896 | a &= 0x1fe;\r |
897 | rdprintf("s68k_regs r16: [%02x] @ %06x", a, SekPcS68k);\r |
913ef4b7 |
898 | if (a >= 0x58 && a < 0x68)\r |
cb4a513a |
899 | d = gfx_cd_read(a);\r |
900 | else d = s68k_reg_read16(a);\r |
c459aefd |
901 | rdprintf("ret = %04x", d);\r |
cc68a136 |
902 | goto end;\r |
903 | }\r |
904 | \r |
d0d47c5b |
905 | // word RAM (2M area)\r |
906 | if ((a&0xfc0000)==0x080000) { // 080000-0bffff\r |
913ef4b7 |
907 | wrdprintf("s68k_wram2M r16: [%06x] @%06x", a, SekPcS68k);\r |
fa1e5e29 |
908 | if (Pico_mcd->s68k_regs[3]&4) { // 1M decode mode?\r |
909 | int bank = !(Pico_mcd->s68k_regs[3]&1);\r |
910 | d = Pico_mcd->word_ram1M[bank][((a>>1)^1)&0x1ffff];\r |
911 | d |= d << 4; d &= ~0xf0;\r |
912 | dprintf("FIXME: decode");\r |
d0d47c5b |
913 | } else {\r |
914 | // allow access in any mode, like Gens does\r |
fa1e5e29 |
915 | d = *(u16 *)(Pico_mcd->word_ram2M+(a&0x3fffe));\r |
d0d47c5b |
916 | }\r |
913ef4b7 |
917 | wrdprintf("ret = %04x", d);\r |
d0d47c5b |
918 | goto end;\r |
919 | }\r |
920 | \r |
921 | // word RAM (1M area)\r |
68cba51e |
922 | if ((a&0xfe0000)==0x0c0000 && (Pico_mcd->s68k_regs[3]&4)) { // 0c0000-0dffff\r |
fa1e5e29 |
923 | int bank;\r |
913ef4b7 |
924 | wrdprintf("s68k_wram1M r16: [%06x] @%06x", a, SekPcS68k);\r |
68cba51e |
925 | // if (!(Pico_mcd->s68k_regs[3]&4))\r |
926 | // dprintf("s68k_wram1M FIXME: wrong mode");\r |
fa1e5e29 |
927 | bank = !(Pico_mcd->s68k_regs[3]&1);\r |
928 | d = *(u16 *)(Pico_mcd->word_ram1M[bank]+(a&0x1fffe));\r |
913ef4b7 |
929 | wrdprintf("ret = %04x", d);\r |
ab0607f7 |
930 | goto end;\r |
931 | }\r |
932 | \r |
933 | // bram\r |
934 | if ((a&0xff0000)==0xfe0000) {\r |
4ff2d527 |
935 | dprintf("FIXME: s68k_bram r16: [%06x] @%06x", a, SekPcS68k);\r |
ab0607f7 |
936 | a = (a>>1)&0x1fff;\r |
4f265db7 |
937 | d = Pico_mcd->bram[a++]; // Gens does little endian here, and so do we..\r |
4ff2d527 |
938 | d|= Pico_mcd->bram[a++] << 8; // This is most likely wrong\r |
ab0607f7 |
939 | dprintf("ret = %04x", d);\r |
d0d47c5b |
940 | goto end;\r |
941 | }\r |
942 | \r |
4f265db7 |
943 | // PCM\r |
944 | if ((a&0xff8000)==0xff0000) {\r |
4ff2d527 |
945 | dprintf("FIXME: s68k_pcm r16: [%06x] @%06x", a, SekPcS68k);\r |
4f265db7 |
946 | a &= 0x7fff;\r |
947 | if (a >= 0x2000)\r |
948 | d = Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][(a>>1)&0xfff];\r |
949 | else if (a >= 0x20) {\r |
950 | a &= 0x1e;\r |
951 | d = Pico_mcd->pcm.ch[a>>2].addr >> PCM_STEP_SHIFT;\r |
952 | if (a & 2) d >>= 8;\r |
953 | }\r |
954 | dprintf("ret = %04x", d);\r |
955 | goto end;\r |
956 | }\r |
957 | \r |
cc68a136 |
958 | dprintf("s68k r16: %06x, %04x @%06x", a&0xffffff, d, SekPcS68k);\r |
959 | \r |
960 | end:\r |
961 | \r |
962 | #ifdef __debug_io2\r |
963 | dprintf("s68k r16: %06x, %04x @%06x", a&0xffffff, d, SekPcS68k);\r |
964 | #endif\r |
965 | return d;\r |
966 | }\r |
4ff2d527 |
967 | #endif\r |
cc68a136 |
968 | \r |
ab0607f7 |
969 | \r |
4ff2d527 |
970 | #ifdef _ASM_CD_MEMORY_C\r |
971 | u32 PicoReadS68k32(u32 a);\r |
972 | #else\r |
973 | static u32 PicoReadS68k32(u32 a)\r |
cc68a136 |
974 | {\r |
975 | u32 d=0;\r |
976 | \r |
977 | a&=0xfffffe;\r |
978 | \r |
979 | // prg RAM\r |
980 | if (a < 0x80000) {\r |
981 | u16 *pm=(u16 *)(Pico_mcd->prg_ram+a);\r |
982 | d = (pm[0]<<16)|pm[1];\r |
983 | goto end;\r |
984 | }\r |
985 | \r |
986 | // regs\r |
987 | if ((a&0xfffe00) == 0xff8000) {\r |
cb4a513a |
988 | a &= 0x1fe;\r |
989 | rdprintf("s68k_regs r32: [%02x] @ %06x", a, SekPcS68k);\r |
913ef4b7 |
990 | if (a >= 0x58 && a < 0x68)\r |
cb4a513a |
991 | d = (gfx_cd_read(a)<<16)|gfx_cd_read(a+2);\r |
992 | else d = (s68k_reg_read16(a)<<16)|s68k_reg_read16(a+2);\r |
c459aefd |
993 | rdprintf("ret = %08x", d);\r |
cc68a136 |
994 | goto end;\r |
995 | }\r |
996 | \r |
d0d47c5b |
997 | // word RAM (2M area)\r |
998 | if ((a&0xfc0000)==0x080000) { // 080000-0bffff\r |
913ef4b7 |
999 | wrdprintf("s68k_wram2M r32: [%06x] @%06x", a, SekPcS68k);\r |
fa1e5e29 |
1000 | if (Pico_mcd->s68k_regs[3]&4) { // 1M decode mode?\r |
1001 | int bank = !(Pico_mcd->s68k_regs[3]&1);\r |
1002 | a >>= 1;\r |
1003 | d = Pico_mcd->word_ram1M[bank][((a+0)^1)&0x1ffff] << 16;\r |
1004 | d |= Pico_mcd->word_ram1M[bank][((a+1)^1)&0x1ffff];\r |
1005 | d |= d << 4; d &= 0x0f0f0f0f;\r |
d0d47c5b |
1006 | } else {\r |
1007 | // allow access in any mode, like Gens does\r |
fa1e5e29 |
1008 | u16 *pm=(u16 *)(Pico_mcd->word_ram2M+(a&0x3fffe)); d = (pm[0]<<16)|pm[1];\r |
d0d47c5b |
1009 | }\r |
913ef4b7 |
1010 | wrdprintf("ret = %08x", d);\r |
d0d47c5b |
1011 | goto end;\r |
1012 | }\r |
1013 | \r |
1014 | // word RAM (1M area)\r |
68cba51e |
1015 | if ((a&0xfe0000)==0x0c0000 && (Pico_mcd->s68k_regs[3]&4)) { // 0c0000-0dffff\r |
fa1e5e29 |
1016 | int bank;\r |
913ef4b7 |
1017 | wrdprintf("s68k_wram1M r32: [%06x] @%06x", a, SekPcS68k);\r |
68cba51e |
1018 | // if (!(Pico_mcd->s68k_regs[3]&4))\r |
1019 | // dprintf("s68k_wram1M FIXME: wrong mode");\r |
fa1e5e29 |
1020 | bank = !(Pico_mcd->s68k_regs[3]&1);\r |
1021 | u16 *pm=(u16 *)(Pico_mcd->word_ram1M[bank]+(a&0x1fffe)); d = (pm[0]<<16)|pm[1];\r |
913ef4b7 |
1022 | wrdprintf("ret = %08x", d);\r |
ab0607f7 |
1023 | goto end;\r |
1024 | }\r |
1025 | \r |
4f265db7 |
1026 | // PCM\r |
1027 | if ((a&0xff8000)==0xff0000) {\r |
2433f409 |
1028 | dprintf("s68k_pcm r32: [%06x] @%06x", a, SekPcS68k);\r |
4f265db7 |
1029 | a &= 0x7fff;\r |
1030 | if (a >= 0x2000) {\r |
1031 | a >>= 1;\r |
1032 | d = Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][a&0xfff] << 16;\r |
1033 | d |= Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][(a+1)&0xfff];\r |
1034 | } else if (a >= 0x20) {\r |
1035 | a &= 0x1e;\r |
1036 | if (a & 2) {\r |
1037 | a >>= 2;\r |
1038 | d = (Pico_mcd->pcm.ch[a].addr >> (PCM_STEP_SHIFT-8)) & 0xff0000;\r |
1039 | d |= (Pico_mcd->pcm.ch[(a+1)&7].addr >> PCM_STEP_SHIFT) & 0xff;\r |
1040 | } else {\r |
1041 | d = Pico_mcd->pcm.ch[a>>2].addr >> PCM_STEP_SHIFT;\r |
1042 | d = ((d<<16)&0xff0000) | ((d>>8)&0xff); // PCM chip is LE\r |
1043 | }\r |
1044 | }\r |
1045 | dprintf("ret = %08x", d);\r |
1046 | goto end;\r |
1047 | }\r |
1048 | \r |
ab0607f7 |
1049 | // bram\r |
1050 | if ((a&0xff0000)==0xfe0000) {\r |
4ff2d527 |
1051 | dprintf("FIXME: s68k_bram r32: [%06x] @%06x", a, SekPcS68k);\r |
ab0607f7 |
1052 | a = (a>>1)&0x1fff;\r |
1053 | d = Pico_mcd->bram[a++] << 16; // middle endian? TODO: verify against Fusion..\r |
1054 | d|= Pico_mcd->bram[a++] << 24;\r |
1055 | d|= Pico_mcd->bram[a++];\r |
1056 | d|= Pico_mcd->bram[a++] << 8;\r |
1057 | dprintf("ret = %08x", d);\r |
d0d47c5b |
1058 | goto end;\r |
1059 | }\r |
1060 | \r |
cc68a136 |
1061 | dprintf("s68k r32: %06x, %08x @%06x", a&0xffffff, d, SekPcS68k);\r |
1062 | \r |
1063 | end:\r |
1064 | \r |
1065 | #ifdef __debug_io2\r |
1066 | dprintf("s68k r32: %06x, %08x @%06x", a&0xffffff, d, SekPcS68k);\r |
1067 | #endif\r |
1068 | return d;\r |
1069 | }\r |
4ff2d527 |
1070 | #endif\r |
cc68a136 |
1071 | \r |
ab0607f7 |
1072 | \r |
a4030801 |
1073 | #ifndef _ASM_CD_MEMORY_C\r |
0a051f55 |
1074 | /* check: jaguar xj 220 (draws entire world using decode) */\r |
1075 | static void decode_write8(u32 a, u8 d, int r3)\r |
1076 | {\r |
1077 | u8 *pd = Pico_mcd->word_ram1M[!(r3 & 1)] + (((a>>1)^1)&0x1ffff);\r |
1078 | u8 oldmask = (a&1) ? 0xf0 : 0x0f;\r |
1079 | \r |
0a051f55 |
1080 | r3 &= 0x18;\r |
1081 | d &= 0x0f;\r |
1082 | if (!(a&1)) d <<= 4;\r |
1083 | \r |
0a051f55 |
1084 | if (r3 == 8) {\r |
1085 | if ((!(*pd & (~oldmask))) && d) goto do_it;\r |
1086 | } else if (r3 > 8) {\r |
1087 | if (d) goto do_it;\r |
1088 | } else {\r |
1089 | goto do_it;\r |
1090 | }\r |
1091 | \r |
1092 | return;\r |
1093 | do_it:\r |
1094 | *pd = d | (*pd & oldmask);\r |
1095 | }\r |
1096 | \r |
1097 | \r |
1098 | static void decode_write16(u32 a, u16 d, int r3)\r |
1099 | {\r |
1100 | u8 *pd = Pico_mcd->word_ram1M[!(r3 & 1)] + (((a>>1)^1)&0x1ffff);\r |
1101 | \r |
1102 | //if ((a & 0x3ffff) < 0x28000) return;\r |
1103 | \r |
1104 | r3 &= 0x18;\r |
1105 | d &= 0x0f0f;\r |
1106 | d |= d >> 4;\r |
1107 | \r |
1108 | if (r3 == 8) {\r |
1109 | u8 dold = *pd;\r |
1110 | if (!(dold & 0xf0)) dold |= d & 0xf0;\r |
1111 | if (!(dold & 0x0f)) dold |= d & 0x0f;\r |
1112 | *pd = dold;\r |
1113 | } else if (r3 > 8) {\r |
1114 | u8 dold = *pd;\r |
1115 | if (!(d & 0xf0)) d |= dold & 0xf0;\r |
1116 | if (!(d & 0x0f)) d |= dold & 0x0f;\r |
1117 | *pd = d;\r |
1118 | } else {\r |
1119 | *pd = d;\r |
1120 | }\r |
0a051f55 |
1121 | }\r |
a4030801 |
1122 | #endif\r |
0a051f55 |
1123 | \r |
cc68a136 |
1124 | // -----------------------------------------------------------------\r |
1125 | \r |
4ff2d527 |
1126 | #ifdef _ASM_CD_MEMORY_C\r |
1127 | void PicoWriteS68k8(u32 a,u8 d);\r |
1128 | #else\r |
1129 | static void PicoWriteS68k8(u32 a,u8 d)\r |
cc68a136 |
1130 | {\r |
1131 | #ifdef __debug_io2\r |
1132 | dprintf("s68k w8 : %06x, %02x @%06x", a&0xffffff, d, SekPcS68k);\r |
1133 | #endif\r |
1134 | \r |
1135 | a&=0xffffff;\r |
1136 | \r |
1137 | // prg RAM\r |
1138 | if (a < 0x80000) {\r |
1139 | u8 *pm=(u8 *)(Pico_mcd->prg_ram+(a^1));\r |
721cd396 |
1140 | if (a >= (Pico_mcd->s68k_regs[2]<<8)) *pm=d;\r |
cc68a136 |
1141 | return;\r |
1142 | }\r |
1143 | \r |
1144 | // regs\r |
1145 | if ((a&0xfffe00) == 0xff8000) {\r |
cb4a513a |
1146 | a &= 0x1ff;\r |
1147 | rdprintf("s68k_regs w8: [%02x] %02x @ %06x", a, d, SekPcS68k);\r |
913ef4b7 |
1148 | if (a >= 0x58 && a < 0x68)\r |
48e8482f |
1149 | gfx_cd_write16(a&~1, (d<<8)|d);\r |
cb4a513a |
1150 | else s68k_reg_write8(a,d);\r |
cc68a136 |
1151 | return;\r |
1152 | }\r |
1153 | \r |
d0d47c5b |
1154 | // word RAM (2M area)\r |
1155 | if ((a&0xfc0000)==0x080000) { // 080000-0bffff\r |
0a051f55 |
1156 | int r3 = Pico_mcd->s68k_regs[3];\r |
913ef4b7 |
1157 | wrdprintf("s68k_wram2M w8: [%06x] %02x @%06x", a, d, SekPcS68k);\r |
0a051f55 |
1158 | if (r3 & 4) { // 1M decode mode?\r |
1159 | decode_write8(a, d, r3);\r |
d0d47c5b |
1160 | } else {\r |
1161 | // allow access in any mode, like Gens does\r |
fa1e5e29 |
1162 | *(u8 *)(Pico_mcd->word_ram2M+((a^1)&0x3ffff))=d;\r |
d0d47c5b |
1163 | }\r |
1164 | return;\r |
1165 | }\r |
1166 | \r |
1167 | // word RAM (1M area)\r |
68cba51e |
1168 | if ((a&0xfe0000)==0x0c0000 && (Pico_mcd->s68k_regs[3]&4)) { // 0c0000-0dffff\r |
1169 | // Wing Commander tries to write here in wrong mode\r |
fa1e5e29 |
1170 | int bank;\r |
d0d47c5b |
1171 | if (d)\r |
913ef4b7 |
1172 | wrdprintf("s68k_wram1M w8: [%06x] %02x @%06x", a, d, SekPcS68k);\r |
68cba51e |
1173 | // if (!(Pico_mcd->s68k_regs[3]&4))\r |
1174 | // dprintf("s68k_wram1M FIXME: wrong mode");\r |
fa1e5e29 |
1175 | bank = !(Pico_mcd->s68k_regs[3]&1);\r |
1176 | *(u8 *)(Pico_mcd->word_ram1M[bank]+((a^1)&0x1ffff))=d;\r |
d0d47c5b |
1177 | return;\r |
1178 | }\r |
1179 | \r |
4f265db7 |
1180 | // PCM\r |
1181 | if ((a&0xff8000)==0xff0000) {\r |
1182 | a &= 0x7fff;\r |
1183 | if (a >= 0x2000)\r |
1184 | Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][(a>>1)&0xfff] = d;\r |
1185 | else if (a < 0x12)\r |
1186 | pcm_write(a>>1, d);\r |
1187 | return;\r |
1188 | }\r |
1189 | \r |
ab0607f7 |
1190 | // bram\r |
1191 | if ((a&0xff0000)==0xfe0000) {\r |
1192 | Pico_mcd->bram[(a>>1)&0x1fff] = d;\r |
1193 | SRam.changed = 1;\r |
1194 | return;\r |
1195 | }\r |
1196 | \r |
cc68a136 |
1197 | dprintf("s68k w8 : %06x, %02x @%06x", a&0xffffff, d, SekPcS68k);\r |
1198 | }\r |
4ff2d527 |
1199 | #endif\r |
cc68a136 |
1200 | \r |
ab0607f7 |
1201 | \r |
4ff2d527 |
1202 | #ifdef _ASM_CD_MEMORY_C\r |
1203 | void PicoWriteS68k16(u32 a,u16 d);\r |
1204 | #else\r |
1205 | static void PicoWriteS68k16(u32 a,u16 d)\r |
cc68a136 |
1206 | {\r |
1207 | #ifdef __debug_io2\r |
1208 | dprintf("s68k w16: %06x, %04x @%06x", a&0xffffff, d, SekPcS68k);\r |
1209 | #endif\r |
1210 | \r |
1211 | a&=0xfffffe;\r |
1212 | \r |
1213 | // prg RAM\r |
1214 | if (a < 0x80000) {\r |
c008977e |
1215 | wrdprintf("s68k_prgram w16: [%06x] %04x @%06x", a, d, SekPcS68k);\r |
721cd396 |
1216 | if (a >= (Pico_mcd->s68k_regs[2]<<8)) // needed for Dungeon Explorer\r |
1217 | *(u16 *)(Pico_mcd->prg_ram+a)=d;\r |
cc68a136 |
1218 | return;\r |
1219 | }\r |
1220 | \r |
1221 | // regs\r |
1222 | if ((a&0xfffe00) == 0xff8000) {\r |
cb4a513a |
1223 | a &= 0x1fe;\r |
1224 | rdprintf("s68k_regs w16: [%02x] %04x @ %06x", a, d, SekPcS68k);\r |
913ef4b7 |
1225 | if (a >= 0x58 && a < 0x68)\r |
48e8482f |
1226 | gfx_cd_write16(a, d);\r |
cb4a513a |
1227 | else {\r |
1cd356a3 |
1228 | if (a == 0xe) { // special case, 2 byte writes would be handled differently\r |
1229 | Pico_mcd->s68k_regs[0xf] = d;\r |
4ff2d527 |
1230 | return;\r |
1cd356a3 |
1231 | }\r |
cb4a513a |
1232 | s68k_reg_write8(a, d>>8);\r |
1233 | s68k_reg_write8(a+1,d&0xff);\r |
1234 | }\r |
cc68a136 |
1235 | return;\r |
1236 | }\r |
1237 | \r |
d0d47c5b |
1238 | // word RAM (2M area)\r |
1239 | if ((a&0xfc0000)==0x080000) { // 080000-0bffff\r |
0a051f55 |
1240 | int r3 = Pico_mcd->s68k_regs[3];\r |
913ef4b7 |
1241 | wrdprintf("s68k_wram2M w16: [%06x] %04x @%06x", a, d, SekPcS68k);\r |
0a051f55 |
1242 | if (r3 & 4) { // 1M decode mode?\r |
1243 | decode_write16(a, d, r3);\r |
d0d47c5b |
1244 | } else {\r |
1245 | // allow access in any mode, like Gens does\r |
fa1e5e29 |
1246 | *(u16 *)(Pico_mcd->word_ram2M+(a&0x3fffe))=d;\r |
d0d47c5b |
1247 | }\r |
1248 | return;\r |
1249 | }\r |
1250 | \r |
1251 | // word RAM (1M area)\r |
68cba51e |
1252 | if ((a&0xfe0000)==0x0c0000 && (Pico_mcd->s68k_regs[3]&4)) { // 0c0000-0dffff\r |
fa1e5e29 |
1253 | int bank;\r |
d0d47c5b |
1254 | if (d)\r |
913ef4b7 |
1255 | wrdprintf("s68k_wram1M w16: [%06x] %04x @%06x", a, d, SekPcS68k);\r |
68cba51e |
1256 | // if (!(Pico_mcd->s68k_regs[3]&4))\r |
1257 | // dprintf("s68k_wram1M FIXME: wrong mode");\r |
fa1e5e29 |
1258 | bank = !(Pico_mcd->s68k_regs[3]&1);\r |
1259 | *(u16 *)(Pico_mcd->word_ram1M[bank]+(a&0x1fffe))=d;\r |
d0d47c5b |
1260 | return;\r |
1261 | }\r |
1262 | \r |
4f265db7 |
1263 | // PCM\r |
1264 | if ((a&0xff8000)==0xff0000) {\r |
1265 | a &= 0x7fff;\r |
1266 | if (a >= 0x2000)\r |
1267 | Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][(a>>1)&0xfff] = d;\r |
1268 | else if (a < 0x12)\r |
1269 | pcm_write(a>>1, d & 0xff);\r |
1270 | return;\r |
1271 | }\r |
1272 | \r |
ab0607f7 |
1273 | // bram\r |
1274 | if ((a&0xff0000)==0xfe0000) {\r |
1cd356a3 |
1275 | dprintf("s68k_bram w16: [%06x] %04x @%06x", a, d, SekPcS68k);\r |
ab0607f7 |
1276 | a = (a>>1)&0x1fff;\r |
1277 | Pico_mcd->bram[a++] = d; // Gens does little endian here, an so do we..\r |
1278 | Pico_mcd->bram[a++] = d >> 8;\r |
1279 | SRam.changed = 1;\r |
1280 | return;\r |
1281 | }\r |
1282 | \r |
cc68a136 |
1283 | dprintf("s68k w16: %06x, %04x @%06x", a&0xffffff, d, SekPcS68k);\r |
1284 | }\r |
4ff2d527 |
1285 | #endif\r |
cc68a136 |
1286 | \r |
ab0607f7 |
1287 | \r |
4ff2d527 |
1288 | #ifdef _ASM_CD_MEMORY_C\r |
1289 | void PicoWriteS68k32(u32 a,u32 d);\r |
1290 | #else\r |
1291 | static void PicoWriteS68k32(u32 a,u32 d)\r |
cc68a136 |
1292 | {\r |
1293 | #ifdef __debug_io2\r |
1294 | dprintf("s68k w32: %06x, %08x @%06x", a&0xffffff, d, SekPcS68k);\r |
1295 | #endif\r |
1296 | \r |
1297 | a&=0xfffffe;\r |
1298 | \r |
1299 | // prg RAM\r |
1300 | if (a < 0x80000) {\r |
721cd396 |
1301 | if (a >= (Pico_mcd->s68k_regs[2]<<8)) {\r |
1302 | u16 *pm=(u16 *)(Pico_mcd->prg_ram+a);\r |
1303 | pm[0]=(u16)(d>>16); pm[1]=(u16)d;\r |
1304 | }\r |
cc68a136 |
1305 | return;\r |
1306 | }\r |
1307 | \r |
1308 | // regs\r |
1309 | if ((a&0xfffe00) == 0xff8000) {\r |
cb4a513a |
1310 | a &= 0x1fe;\r |
1311 | rdprintf("s68k_regs w32: [%02x] %08x @ %06x", a, d, SekPcS68k);\r |
913ef4b7 |
1312 | if (a >= 0x58 && a < 0x68) {\r |
48e8482f |
1313 | gfx_cd_write16(a, d>>16);\r |
1314 | gfx_cd_write16(a+2, d&0xffff);\r |
cb4a513a |
1315 | } else {\r |
2433f409 |
1316 | if ((a&0x1fe) == 0xe) dprintf("s68k FIXME: w32 [%02x]", a&0x3f);\r |
cb4a513a |
1317 | s68k_reg_write8(a, d>>24);\r |
1318 | s68k_reg_write8(a+1,(d>>16)&0xff);\r |
1319 | s68k_reg_write8(a+2,(d>>8) &0xff);\r |
1320 | s68k_reg_write8(a+3, d &0xff);\r |
1321 | }\r |
cc68a136 |
1322 | return;\r |
1323 | }\r |
1324 | \r |
d0d47c5b |
1325 | // word RAM (2M area)\r |
1326 | if ((a&0xfc0000)==0x080000) { // 080000-0bffff\r |
0a051f55 |
1327 | int r3 = Pico_mcd->s68k_regs[3];\r |
913ef4b7 |
1328 | wrdprintf("s68k_wram2M w32: [%06x] %08x @%06x", a, d, SekPcS68k);\r |
0a051f55 |
1329 | if (r3 & 4) { // 1M decode mode?\r |
1330 | decode_write16(a , d >> 16, r3);\r |
1331 | decode_write16(a+2, d , r3);\r |
d0d47c5b |
1332 | } else {\r |
1333 | // allow access in any mode, like Gens does\r |
fa1e5e29 |
1334 | u16 *pm=(u16 *)(Pico_mcd->word_ram2M+(a&0x3fffe));\r |
d0d47c5b |
1335 | pm[0]=(u16)(d>>16); pm[1]=(u16)d;\r |
1336 | }\r |
1337 | return;\r |
1338 | }\r |
1339 | \r |
1340 | // word RAM (1M area)\r |
68cba51e |
1341 | if ((a&0xfe0000)==0x0c0000 && (Pico_mcd->s68k_regs[3]&4)) { // 0c0000-0dffff\r |
fa1e5e29 |
1342 | int bank;\r |
1343 | u16 *pm;\r |
d0d47c5b |
1344 | if (d)\r |
913ef4b7 |
1345 | wrdprintf("s68k_wram1M w32: [%06x] %08x @%06x", a, d, SekPcS68k);\r |
68cba51e |
1346 | // if (!(Pico_mcd->s68k_regs[3]&4))\r |
1347 | // dprintf("s68k_wram1M FIXME: wrong mode");\r |
fa1e5e29 |
1348 | bank = !(Pico_mcd->s68k_regs[3]&1);\r |
1349 | pm=(u16 *)(Pico_mcd->word_ram1M[bank]+(a&0x1fffe));\r |
1350 | pm[0]=(u16)(d>>16); pm[1]=(u16)d;\r |
d0d47c5b |
1351 | return;\r |
1352 | }\r |
ab0607f7 |
1353 | \r |
4f265db7 |
1354 | // PCM\r |
1355 | if ((a&0xff8000)==0xff0000) {\r |
1356 | a &= 0x7fff;\r |
1357 | if (a >= 0x2000) {\r |
1358 | a >>= 1;\r |
1359 | Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][a&0xfff] = (d >> 16);\r |
1360 | Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][(a+1)&0xfff] = d;\r |
1361 | } else if (a < 0x12) {\r |
1362 | a >>= 1;\r |
1363 | pcm_write(a, (d>>16) & 0xff);\r |
1364 | pcm_write(a+1, d & 0xff);\r |
1365 | }\r |
1366 | return;\r |
1367 | }\r |
1368 | \r |
ab0607f7 |
1369 | // bram\r |
1370 | if ((a&0xff0000)==0xfe0000) {\r |
1cd356a3 |
1371 | dprintf("s68k_bram w32: [%06x] %08x @%06x", a, d, SekPcS68k);\r |
ab0607f7 |
1372 | a = (a>>1)&0x1fff;\r |
1373 | Pico_mcd->bram[a++] = d >> 16; // middle endian? verify?\r |
1374 | Pico_mcd->bram[a++] = d >> 24;\r |
1375 | Pico_mcd->bram[a++] = d;\r |
1376 | Pico_mcd->bram[a++] = d >> 8;\r |
1377 | SRam.changed = 1;\r |
1378 | return;\r |
1379 | }\r |
1380 | \r |
cc68a136 |
1381 | dprintf("s68k w32: %06x, %08x @%06x", a&0xffffff, d, SekPcS68k);\r |
1382 | }\r |
4ff2d527 |
1383 | #endif\r |
cc68a136 |
1384 | \r |
1385 | \r |
1386 | // -----------------------------------------------------------------\r |
1387 | \r |
b837b69b |
1388 | \r |
1389 | #if defined(EMU_C68K)\r |
1390 | static __inline int PicoMemBaseM68k(u32 pc)\r |
1391 | {\r |
fa1e5e29 |
1392 | if ((pc&0xe00000)==0xe00000)\r |
1393 | return (int)Pico.ram-(pc&0xff0000); // Program Counter in Ram\r |
b837b69b |
1394 | \r |
1395 | if (pc < 0x20000)\r |
fa1e5e29 |
1396 | return (int)Pico_mcd->bios; // Program Counter in BIOS\r |
1397 | \r |
1398 | if ((pc&0xfc0000)==0x200000)\r |
b837b69b |
1399 | {\r |
fa1e5e29 |
1400 | if (!(Pico_mcd->s68k_regs[3]&4))\r |
1401 | return (int)Pico_mcd->word_ram2M - 0x200000; // Program Counter in Word Ram\r |
1402 | if (pc < 0x220000) {\r |
1403 | int bank = (Pico_mcd->s68k_regs[3]&1);\r |
1404 | return (int)Pico_mcd->word_ram1M[bank] - 0x200000;\r |
1405 | }\r |
b837b69b |
1406 | }\r |
1407 | \r |
fa1e5e29 |
1408 | // Error - Program Counter is invalid\r |
1409 | dprintf("m68k FIXME: unhandled jump to %06x", pc);\r |
1410 | \r |
1411 | return (int)Pico_mcd->bios;\r |
b837b69b |
1412 | }\r |
1413 | \r |
1414 | \r |
1415 | static u32 PicoCheckPcM68k(u32 pc)\r |
1416 | {\r |
1417 | pc-=PicoCpu.membase; // Get real pc\r |
1418 | pc&=0xfffffe;\r |
1419 | \r |
1420 | PicoCpu.membase=PicoMemBaseM68k(pc);\r |
1421 | \r |
1422 | return PicoCpu.membase+pc;\r |
1423 | }\r |
1424 | \r |
1425 | \r |
1426 | static __inline int PicoMemBaseS68k(u32 pc)\r |
1427 | {\r |
fa1e5e29 |
1428 | if (pc < 0x80000) // PRG RAM\r |
1429 | return (int)Pico_mcd->prg_ram;\r |
b837b69b |
1430 | \r |
fa1e5e29 |
1431 | if ((pc&0xfc0000)==0x080000) // WORD RAM 2M area (assume we are in the right mode..)\r |
1432 | return (int)Pico_mcd->word_ram2M - 0x080000;\r |
1433 | \r |
1434 | if ((pc&0xfe0000)==0x0c0000) { // word RAM 1M area\r |
1435 | int bank = !(Pico_mcd->s68k_regs[3]&1);\r |
1436 | return (int)Pico_mcd->word_ram1M[bank] - 0x0c0000;\r |
b837b69b |
1437 | }\r |
1438 | \r |
fa1e5e29 |
1439 | // Error - Program Counter is invalid\r |
1440 | dprintf("s68k FIXME: unhandled jump to %06x", pc);\r |
1441 | \r |
1442 | return (int)Pico_mcd->prg_ram;\r |
b837b69b |
1443 | }\r |
1444 | \r |
1445 | \r |
1446 | static u32 PicoCheckPcS68k(u32 pc)\r |
1447 | {\r |
1448 | pc-=PicoCpuS68k.membase; // Get real pc\r |
1449 | pc&=0xfffffe;\r |
1450 | \r |
1451 | PicoCpuS68k.membase=PicoMemBaseS68k(pc);\r |
1452 | \r |
1453 | return PicoCpuS68k.membase+pc;\r |
1454 | }\r |
1455 | #endif\r |
1456 | \r |
1457 | \r |
1458 | void PicoMemSetupCD()\r |
1459 | {\r |
1460 | dprintf("PicoMemSetupCD()");\r |
1461 | #ifdef EMU_C68K\r |
1462 | // Setup m68k memory callbacks:\r |
1463 | PicoCpu.checkpc=PicoCheckPcM68k;\r |
1464 | PicoCpu.fetch8 =PicoCpu.read8 =PicoReadM68k8;\r |
1465 | PicoCpu.fetch16=PicoCpu.read16=PicoReadM68k16;\r |
1466 | PicoCpu.fetch32=PicoCpu.read32=PicoReadM68k32;\r |
1467 | PicoCpu.write8 =PicoWriteM68k8;\r |
1468 | PicoCpu.write16=PicoWriteM68k16;\r |
1469 | PicoCpu.write32=PicoWriteM68k32;\r |
1470 | // s68k\r |
1471 | PicoCpuS68k.checkpc=PicoCheckPcS68k;\r |
1472 | PicoCpuS68k.fetch8 =PicoCpuS68k.read8 =PicoReadS68k8;\r |
1473 | PicoCpuS68k.fetch16=PicoCpuS68k.read16=PicoReadS68k16;\r |
1474 | PicoCpuS68k.fetch32=PicoCpuS68k.read32=PicoReadS68k32;\r |
1475 | PicoCpuS68k.write8 =PicoWriteS68k8;\r |
1476 | PicoCpuS68k.write16=PicoWriteS68k16;\r |
1477 | PicoCpuS68k.write32=PicoWriteS68k32;\r |
1478 | #endif\r |
7a1f6e45 |
1479 | // m68k_poll_addr = m68k_poll_cnt = 0;\r |
1480 | s68k_poll_adclk = s68k_poll_cnt = 0;\r |
b837b69b |
1481 | }\r |
1482 | \r |
1483 | \r |
cc68a136 |
1484 | #ifdef EMU_M68K\r |
1485 | unsigned char PicoReadCD8w (unsigned int a) {\r |
1486 | return m68ki_cpu_p == &PicoS68kCPU ? PicoReadS68k8(a) : PicoReadM68k8(a);\r |
1487 | }\r |
1488 | unsigned short PicoReadCD16w(unsigned int a) {\r |
1489 | return m68ki_cpu_p == &PicoS68kCPU ? PicoReadS68k16(a) : PicoReadM68k16(a);\r |
1490 | }\r |
1491 | unsigned int PicoReadCD32w(unsigned int a) {\r |
1492 | return m68ki_cpu_p == &PicoS68kCPU ? PicoReadS68k32(a) : PicoReadM68k32(a);\r |
1493 | }\r |
1494 | void PicoWriteCD8w (unsigned int a, unsigned char d) {\r |
1495 | if (m68ki_cpu_p == &PicoS68kCPU) PicoWriteS68k8(a, d); else PicoWriteM68k8(a, d);\r |
1496 | }\r |
1497 | void PicoWriteCD16w(unsigned int a, unsigned short d) {\r |
1498 | if (m68ki_cpu_p == &PicoS68kCPU) PicoWriteS68k16(a, d); else PicoWriteM68k16(a, d);\r |
1499 | }\r |
1500 | void PicoWriteCD32w(unsigned int a, unsigned int d) {\r |
1501 | if (m68ki_cpu_p == &PicoS68kCPU) PicoWriteS68k32(a, d); else PicoWriteM68k32(a, d);\r |
1502 | }\r |
1503 | \r |
1504 | // these are allowed to access RAM\r |
1505 | unsigned int m68k_read_pcrelative_CD8 (unsigned int a) {\r |
1506 | a&=0xffffff;\r |
1507 | if(m68ki_cpu_p == &PicoS68kCPU) {\r |
1508 | if (a < 0x80000) return *(u8 *)(Pico_mcd->prg_ram+(a^1)); // PRG Ram\r |
fa1e5e29 |
1509 | if ((a&0xfc0000)==0x080000 && !(Pico_mcd->s68k_regs[3]&4)) // word RAM (2M area: 080000-0bffff)\r |
1510 | return *(u8 *)(Pico_mcd->word_ram2M+((a^1)&0x3ffff));\r |
1511 | if ((a&0xfe0000)==0x0c0000 && (Pico_mcd->s68k_regs[3]&4)) { // word RAM (1M area: 0c0000-0dffff)\r |
1512 | int bank = !(Pico_mcd->s68k_regs[3]&1);\r |
1513 | return *(u8 *)(Pico_mcd->word_ram1M[bank]+((a^1)&0x1ffff));\r |
1514 | }\r |
1515 | dprintf("s68k_read_pcrelative_CD8 FIXME: can't handle %06x", a);\r |
cc68a136 |
1516 | } else {\r |
cc68a136 |
1517 | if((a&0xe00000)==0xe00000) return *(u8 *)(Pico.ram+((a^1)&0xffff)); // Ram\r |
fa1e5e29 |
1518 | if(a<0x20000) return *(u8 *)(Pico.rom+(a^1)); // Bios\r |
1519 | if((a&0xfc0000)==0x200000) { // word RAM\r |
1520 | if(!(Pico_mcd->s68k_regs[3]&4)) // 2M?\r |
1521 | return *(u8 *)(Pico_mcd->word_ram2M+((a^1)&0x3ffff));\r |
1522 | else if (a < 0x220000) {\r |
1523 | int bank = Pico_mcd->s68k_regs[3]&1;\r |
1524 | return *(u8 *)(Pico_mcd->word_ram1M[bank]+((a^1)&0x1ffff));\r |
1525 | }\r |
1526 | }\r |
1527 | dprintf("m68k_read_pcrelative_CD8 FIXME: can't handle %06x", a);\r |
cc68a136 |
1528 | }\r |
1529 | return 0;//(u8) lastread_d;\r |
1530 | }\r |
1531 | unsigned int m68k_read_pcrelative_CD16(unsigned int a) {\r |
1532 | a&=0xffffff;\r |
1533 | if(m68ki_cpu_p == &PicoS68kCPU) {\r |
1534 | if (a < 0x80000) return *(u16 *)(Pico_mcd->prg_ram+(a&~1)); // PRG Ram\r |
fa1e5e29 |
1535 | if ((a&0xfc0000)==0x080000 && !(Pico_mcd->s68k_regs[3]&4)) // word RAM (2M area: 080000-0bffff)\r |
1536 | return *(u16 *)(Pico_mcd->word_ram2M+(a&0x3fffe));\r |
1537 | if ((a&0xfe0000)==0x0c0000 && (Pico_mcd->s68k_regs[3]&4)) { // word RAM (1M area: 0c0000-0dffff)\r |
1538 | int bank = !(Pico_mcd->s68k_regs[3]&1);\r |
1539 | return *(u16 *)(Pico_mcd->word_ram1M[bank]+(a&0x1fffe));\r |
1540 | }\r |
1541 | dprintf("s68k_read_pcrelative_CD16 FIXME: can't handle %06x", a);\r |
cc68a136 |
1542 | } else {\r |
cc68a136 |
1543 | if((a&0xe00000)==0xe00000) return *(u16 *)(Pico.ram+(a&0xfffe)); // Ram\r |
fa1e5e29 |
1544 | if(a<0x20000) return *(u16 *)(Pico.rom+(a&~1)); // Bios\r |
1545 | if((a&0xfc0000)==0x200000) { // word RAM\r |
1546 | if(!(Pico_mcd->s68k_regs[3]&4)) // 2M?\r |
1547 | return *(u16 *)(Pico_mcd->word_ram2M+(a&0x3fffe));\r |
1548 | else if (a < 0x220000) {\r |
1549 | int bank = Pico_mcd->s68k_regs[3]&1;\r |
1550 | return *(u16 *)(Pico_mcd->word_ram1M[bank]+(a&0x1fffe));\r |
1551 | }\r |
1552 | }\r |
1553 | dprintf("m68k_read_pcrelative_CD16 FIXME: can't handle %06x", a);\r |
cc68a136 |
1554 | }\r |
b837b69b |
1555 | return 0;\r |
cc68a136 |
1556 | }\r |
1557 | unsigned int m68k_read_pcrelative_CD32(unsigned int a) {\r |
fa1e5e29 |
1558 | u16 *pm;\r |
cc68a136 |
1559 | a&=0xffffff;\r |
1560 | if(m68ki_cpu_p == &PicoS68kCPU) {\r |
1561 | if (a < 0x80000) { u16 *pm=(u16 *)(Pico_mcd->prg_ram+(a&~1)); return (pm[0]<<16)|pm[1]; } // PRG Ram\r |
fa1e5e29 |
1562 | if ((a&0xfc0000)==0x080000 && !(Pico_mcd->s68k_regs[3]&4)) // word RAM (2M area: 080000-0bffff)\r |
1563 | { pm=(u16 *)(Pico_mcd->word_ram2M+(a&0x3fffe)); return (pm[0]<<16)|pm[1]; }\r |
1564 | if ((a&0xfe0000)==0x0c0000 && (Pico_mcd->s68k_regs[3]&4)) { // word RAM (1M area: 0c0000-0dffff)\r |
1565 | int bank = !(Pico_mcd->s68k_regs[3]&1);\r |
1566 | pm=(u16 *)(Pico_mcd->word_ram1M[bank]+(a&0x1fffe));\r |
1567 | return (pm[0]<<16)|pm[1];\r |
1568 | }\r |
1569 | dprintf("s68k_read_pcrelative_CD32 FIXME: can't handle %06x", a);\r |
cc68a136 |
1570 | } else {\r |
cc68a136 |
1571 | if((a&0xe00000)==0xe00000) { u16 *pm=(u16 *)(Pico.ram+(a&0xfffe)); return (pm[0]<<16)|pm[1]; } // Ram\r |
fa1e5e29 |
1572 | if(a<0x20000) { u16 *pm=(u16 *)(Pico.rom+(a&~1)); return (pm[0]<<16)|pm[1]; }\r |
1573 | if((a&0xfc0000)==0x200000) { // word RAM\r |
1574 | if(!(Pico_mcd->s68k_regs[3]&4)) // 2M?\r |
1575 | { pm=(u16 *)(Pico_mcd->word_ram2M+(a&0x3fffe)); return (pm[0]<<16)|pm[1]; }\r |
1576 | else if (a < 0x220000) {\r |
1577 | int bank = Pico_mcd->s68k_regs[3]&1;\r |
1578 | pm=(u16 *)(Pico_mcd->word_ram1M[bank]+(a&0x1fffe));\r |
1579 | return (pm[0]<<16)|pm[1];\r |
1580 | }\r |
1581 | }\r |
1582 | dprintf("m68k_read_pcrelative_CD32 FIXME: can't handle %06x", a);\r |
cc68a136 |
1583 | }\r |
b837b69b |
1584 | return 0;\r |
cc68a136 |
1585 | }\r |
1586 | #endif // EMU_M68K\r |
1587 | \r |