cff531af |
1 | /*\r |
2 | * PicoDrive\r |
3 | * (c) Copyright Dave, 2004\r |
4 | * (C) notaz, 2006-2010\r |
7bf552b5 |
5 | * (C) irixxxx, 2020-2024\r |
cff531af |
6 | *\r |
7 | * This work is licensed under the terms of MAME license.\r |
8 | * See COPYING file in the top-level directory.\r |
9 | */\r |
cc68a136 |
10 | \r |
efcba75f |
11 | #include "pico_int.h"\r |
cc68a136 |
12 | #include "sound/ym2612.h"\r |
13 | \r |
cc68a136 |
14 | struct Pico Pico;\r |
88fd63ad |
15 | struct PicoMem PicoMem;\r |
93f9619e |
16 | PicoInterface PicoIn;\r |
602133e1 |
17 | \r |
f8ef8ff7 |
18 | void (*PicoResetHook)(void) = NULL;\r |
b0677887 |
19 | void (*PicoLineHook)(void) = NULL;\r |
cc68a136 |
20 | \r |
cc68a136 |
21 | // to be called once on emu init\r |
2aa27095 |
22 | void PicoInit(void)\r |
cc68a136 |
23 | {\r |
24 | // Blank space for state:\r |
25 | memset(&Pico,0,sizeof(Pico));\r |
88fd63ad |
26 | memset(&PicoMem,0,sizeof(PicoMem));\r |
93f9619e |
27 | memset(&PicoIn.pad,0,sizeof(PicoIn.pad));\r |
28 | memset(&PicoIn.padInt,0,sizeof(PicoIn.padInt));\r |
cc68a136 |
29 | \r |
88fd63ad |
30 | Pico.est.Pico = &Pico;\r |
31 | Pico.est.PicoMem_vram = PicoMem.vram;\r |
32 | Pico.est.PicoMem_cram = PicoMem.cram;\r |
93f9619e |
33 | Pico.est.PicoOpt = &PicoIn.opt;\r |
ea38612f |
34 | \r |
cc68a136 |
35 | // Init CPUs:\r |
36 | SekInit();\r |
37 | z80_init(); // init even if we aren't going to use it\r |
38 | \r |
cc68a136 |
39 | PicoInitMCD();\r |
e807ac75 |
40 | PicoSVPInit();\r |
be2c4208 |
41 | Pico32xInit();\r |
a2f24bfa |
42 | PsndInit();\r |
99bdfd31 |
43 | \r |
1886ac5f |
44 | PicoVideoInit();\r |
99bdfd31 |
45 | PicoDrawInit();\r |
98a27142 |
46 | PicoDraw2Init();\r |
cc68a136 |
47 | }\r |
48 | \r |
49 | // to be called once on emu exit\r |
50 | void PicoExit(void)\r |
51 | {\r |
93f9619e |
52 | if (PicoIn.AHW & PAHW_MCD)\r |
4f265db7 |
53 | PicoExitMCD();\r |
ca482e5d |
54 | PicoCartUnload();\r |
cc68a136 |
55 | z80_exit();\r |
a2f24bfa |
56 | PsndExit();\r |
cc68a136 |
57 | \r |
a4fa71d4 |
58 | free(Pico.sv.data);\r |
59 | Pico.sv.data = NULL;\r |
60 | Pico.sv.start = Pico.sv.end = 0;\r |
19886062 |
61 | pevt_dump();\r |
cc68a136 |
62 | }\r |
63 | \r |
1cb1584b |
64 | void PicoPower(void)\r |
65 | {\r |
053fd9b4 |
66 | Pico.m.frame_count = 0;\r |
88fd63ad |
67 | Pico.t.m68c_cnt = Pico.t.m68c_aim = 0;\r |
053fd9b4 |
68 | \r |
1cb1584b |
69 | // clear all memory of the emulated machine\r |
88fd63ad |
70 | memset(&PicoMem,0,sizeof(PicoMem));\r |
1cb1584b |
71 | \r |
72 | memset(&Pico.video,0,sizeof(Pico.video));\r |
73 | memset(&Pico.m,0,sizeof(Pico.m));\r |
17bd69ad |
74 | memset(&Pico.t,0,sizeof(Pico.t));\r |
1cb1584b |
75 | \r |
531a8f38 |
76 | // my MD1 VA6 console has this in IO\r |
88fd63ad |
77 | PicoMem.ioports[1] = PicoMem.ioports[2] = PicoMem.ioports[3] = 0xff;\r |
531a8f38 |
78 | \r |
c7661b80 |
79 | Pico.video.hint_irq = (PicoIn.AHW & PAHW_PICO ? 5 : 4);\r |
80 | \r |
93f9619e |
81 | if (PicoIn.AHW & PAHW_MCD)\r |
1cb1584b |
82 | PicoPowerMCD();\r |
83 | \r |
93f9619e |
84 | if (PicoIn.opt & POPT_EN_32X)\r |
974fdb5b |
85 | PicoPower32x();\r |
86 | \r |
1cb1584b |
87 | PicoReset();\r |
96e59821 |
88 | \r |
89 | // powerup default VDP register values from TMSS BIOS\r |
90 | Pico.video.reg[0] = Pico.video.reg[1] = 0x04;\r |
91 | Pico.video.reg[0xc] = 0x81;\r |
92 | Pico.video.reg[0xf] = 0x02;\r |
93 | SATaddr = 0x0000;\r |
94 | SATmask = ~0x3ff;\r |
1cb1584b |
95 | }\r |
96 | \r |
1e6b5e39 |
97 | PICO_INTERNAL void PicoDetectRegion(void)\r |
cc68a136 |
98 | {\r |
1e6b5e39 |
99 | int support=0, hw=0, i;\r |
cc68a136 |
100 | unsigned char pal=0;\r |
7cbd42bc |
101 | char *pr = (char *)(Pico.rom + 0x1f0);\r |
cc68a136 |
102 | \r |
93f9619e |
103 | if (PicoIn.regionOverride)\r |
cc68a136 |
104 | {\r |
93f9619e |
105 | support = PicoIn.regionOverride;\r |
cc68a136 |
106 | }\r |
7cbd42bc |
107 | else if (strcmp(pr, "EUROPE") == 0 || strcmp(pr, "Europe") == 0)\r |
108 | {\r |
109 | // Unusual cartridge region 'code'\r |
110 | support|=8;\r |
111 | }\r |
cc68a136 |
112 | else\r |
113 | {\r |
114 | // Read cartridge region data:\r |
7cbd42bc |
115 | unsigned short *rd = (unsigned short *)pr;\r |
af37bca8 |
116 | int region = (rd[0] << 16) | rd[1];\r |
cc68a136 |
117 | \r |
af37bca8 |
118 | for (i = 0; i < 4; i++)\r |
cc68a136 |
119 | {\r |
af37bca8 |
120 | int c;\r |
cc68a136 |
121 | \r |
af37bca8 |
122 | c = region >> (i<<3);\r |
123 | c &= 0xff;\r |
124 | if (c <= ' ') continue;\r |
cc68a136 |
125 | \r |
51a902ae |
126 | if (c=='J') support|=1;\r |
127 | else if (c=='U') support|=4;\r |
128 | else if (c=='E') support|=8;\r |
129 | else if (c=='j') {support|=1; break; }\r |
130 | else if (c=='u') {support|=4; break; }\r |
131 | else if (c=='e') {support|=8; break; }\r |
cc68a136 |
132 | else\r |
133 | {\r |
134 | // New style code:\r |
135 | char s[2]={0,0};\r |
136 | s[0]=(char)c;\r |
137 | support|=strtol(s,NULL,16);\r |
138 | }\r |
139 | }\r |
140 | }\r |
141 | \r |
51a902ae |
142 | // auto detection order override\r |
93f9619e |
143 | if (PicoIn.autoRgnOrder) {\r |
144 | if (((PicoIn.autoRgnOrder>>0)&0xf) & support) support = (PicoIn.autoRgnOrder>>0)&0xf;\r |
145 | else if (((PicoIn.autoRgnOrder>>4)&0xf) & support) support = (PicoIn.autoRgnOrder>>4)&0xf;\r |
146 | else if (((PicoIn.autoRgnOrder>>8)&0xf) & support) support = (PicoIn.autoRgnOrder>>8)&0xf;\r |
51a902ae |
147 | }\r |
148 | \r |
cc68a136 |
149 | // Try to pick the best hardware value for English/50hz:\r |
150 | if (support&8) { hw=0xc0; pal=1; } // Europe\r |
151 | else if (support&4) hw=0x80; // USA\r |
152 | else if (support&2) { hw=0x40; pal=1; } // Japan PAL\r |
153 | else if (support&1) hw=0x00; // Japan NTSC\r |
154 | else hw=0x80; // USA\r |
155 | \r |
02ff0254 |
156 | if (!(PicoIn.AHW & PAHW_MCD)) hw |= 0x20; // No disk attached\r |
157 | \r |
158 | Pico.m.hardware=(unsigned char)hw; \r |
cc68a136 |
159 | Pico.m.pal=pal;\r |
1e6b5e39 |
160 | }\r |
161 | \r |
162 | int PicoReset(void)\r |
163 | {\r |
2ec9bec5 |
164 | if (Pico.romsize <= 0)\r |
165 | return 1;\r |
1e6b5e39 |
166 | \r |
12da51c2 |
167 | #if defined(CPU_CMP_R) || defined(CPU_CMP_W) || defined(DRC_CMP)\r |
93f9619e |
168 | PicoIn.opt |= POPT_DIS_VDP_FIFO|POPT_DIS_IDLE_DET;\r |
6d797957 |
169 | #endif\r |
170 | \r |
1e6b5e39 |
171 | /* must call now, so that banking is reset, and correct vectors get fetched */\r |
2ec9bec5 |
172 | if (PicoResetHook)\r |
173 | PicoResetHook();\r |
1e6b5e39 |
174 | \r |
93f9619e |
175 | memset(&PicoIn.padInt, 0, sizeof(PicoIn.padInt));\r |
2ec9bec5 |
176 | \r |
db2b6d99 |
177 | z80_reset();\r |
93f9619e |
178 | if (PicoIn.AHW & PAHW_SMS) {\r |
2ec9bec5 |
179 | PicoResetMS();\r |
180 | return 0;\r |
181 | }\r |
182 | \r |
183 | SekReset();\r |
8e4e84c2 |
184 | // ..but do not reset SekCycle* to not desync with addons\r |
185 | \r |
1e6b5e39 |
186 | // s68k doesn't have the TAS quirk, so we just globally set normal TAS handler in MCD mode (used by Batman games).\r |
93f9619e |
187 | SekSetRealTAS(PicoIn.AHW & PAHW_MCD);\r |
1e6b5e39 |
188 | \r |
1832075e |
189 | Pico.m.z80_bank68k = 0;\r |
af37bca8 |
190 | Pico.m.z80_reset = 1;\r |
1832075e |
191 | \r |
1e6b5e39 |
192 | PicoDetectRegion();\r |
51d6248b |
193 | \r |
194 | PicoVideoReset();\r |
cc68a136 |
195 | \r |
9d917eea |
196 | PsndReset(); // pal must be known here\r |
cc68a136 |
197 | \r |
1cb1584b |
198 | // create an empty "dma" to cause 68k exec start at random frame location\r |
133006a9 |
199 | Pico.t.m68c_line_start = Pico.t.m68c_aim;\r |
17bd69ad |
200 | PicoVideoFIFOWrite(rand() & 0x1fff, 0, 0, PVS_CPURD);\r |
1cb1584b |
201 | \r |
5ed2a20e |
202 | SekFinishIdleDet();\r |
203 | \r |
eb990fd6 |
204 | if (PicoIn.opt & POPT_EN_32X)\r |
205 | PicoReset32x();\r |
206 | \r |
93f9619e |
207 | if (PicoIn.AHW & PAHW_MCD) {\r |
1cb1584b |
208 | PicoResetMCD();\r |
cc68a136 |
209 | return 0;\r |
210 | }\r |
5ed2a20e |
211 | \r |
212 | // reinit, so that checksum checks pass\r |
93f9619e |
213 | if (!(PicoIn.opt & POPT_DIS_IDLE_DET))\r |
5ed2a20e |
214 | SekInitIdleDet();\r |
cc68a136 |
215 | \r |
1dceadae |
216 | // reset sram state; enable sram access by default if it doesn't overlap with ROM\r |
45f2f245 |
217 | Pico.m.sram_reg = 0;\r |
88fd63ad |
218 | if ((Pico.sv.flags & SRF_EEPROM) || Pico.romsize <= Pico.sv.start)\r |
45f2f245 |
219 | Pico.m.sram_reg |= SRR_MAPPED;\r |
cc68a136 |
220 | \r |
88fd63ad |
221 | if (Pico.sv.flags & SRF_ENABLED)\r |
222 | elprintf(EL_STATUS, "sram: %06x - %06x; eeprom: %i", Pico.sv.start, Pico.sv.end,\r |
223 | !!(Pico.sv.flags & SRF_EEPROM));\r |
cc68a136 |
224 | \r |
225 | return 0;\r |
226 | }\r |
227 | \r |
46bcb899 |
228 | // flush config changes before emu loop starts\r |
5e128c6d |
229 | void PicoLoopPrepare(void)\r |
230 | {\r |
93f9619e |
231 | if (PicoIn.regionOverride)\r |
5e128c6d |
232 | // force setting possibly changed..\r |
93f9619e |
233 | Pico.m.pal = (PicoIn.regionOverride == 2 || PicoIn.regionOverride == 8) ? 1 : 0;\r |
5e128c6d |
234 | \r |
70216221 |
235 | if (Pico.m.pal) {\r |
236 | Pico.t.vcnt_wrap = 0x103;\r |
237 | Pico.t.vcnt_adj = 57;\r |
238 | }\r |
239 | else {\r |
240 | Pico.t.vcnt_wrap = 0xEB;\r |
241 | Pico.t.vcnt_adj = 6;\r |
242 | }\r |
c5ecd7a0 |
243 | PicoVideoFIFOMode(Pico.video.reg[1]&0x40, Pico.video.reg[12]&1);\r |
70216221 |
244 | \r |
2446536b |
245 | Pico.m.dirtyPal = 1;\r |
246 | rendstatus_old = -1;\r |
3d7abd69 |
247 | \r |
7263343d |
248 | if (PicoIn.AHW & PAHW_MCD)\r |
249 | PicoMCDPrepare();\r |
3d7abd69 |
250 | if (PicoIn.AHW & PAHW_32X)\r |
251 | Pico32xPrepare();\r |
5e128c6d |
252 | }\r |
253 | \r |
efcba75f |
254 | #include "pico_cmn.c"\r |
4b9c5888 |
255 | \r |
4b9c5888 |
256 | /* sync z80 to 68k */\r |
ae214f1c |
257 | PICO_INTERNAL void PicoSyncZ80(unsigned int m68k_cycles_done)\r |
cc68a136 |
258 | {\r |
a6523294 |
259 | int m68k_cnt;\r |
4b9c5888 |
260 | int cnt;\r |
a6523294 |
261 | \r |
88fd63ad |
262 | m68k_cnt = m68k_cycles_done - Pico.t.m68c_frame_start;\r |
263 | Pico.t.z80c_aim = cycles_68k_to_z80(m68k_cnt);\r |
264 | cnt = Pico.t.z80c_aim - Pico.t.z80c_cnt;\r |
cc68a136 |
265 | \r |
f6c49d38 |
266 | pprof_start(z80);\r |
267 | \r |
ae214f1c |
268 | elprintf(EL_BUSREQ, "z80 sync %i (%u|%u -> %u|%u)", cnt,\r |
88fd63ad |
269 | Pico.t.z80c_cnt, Pico.t.z80c_cnt * 15 / 7 / 488,\r |
270 | Pico.t.z80c_aim, Pico.t.z80c_aim * 15 / 7 / 488);\r |
4b9c5888 |
271 | \r |
272 | if (cnt > 0)\r |
88fd63ad |
273 | Pico.t.z80c_cnt += z80_run(cnt);\r |
f6c49d38 |
274 | \r |
275 | pprof_end(z80);\r |
cc68a136 |
276 | }\r |
277 | \r |
4b9c5888 |
278 | \r |
2aa27095 |
279 | void PicoFrame(void)\r |
cc68a136 |
280 | {\r |
f6c49d38 |
281 | pprof_start(frame);\r |
282 | \r |
8c1952f0 |
283 | Pico.m.frame_count++;\r |
284 | \r |
93f9619e |
285 | if (PicoIn.AHW & PAHW_SMS) {\r |
19954be1 |
286 | PicoFrameMS();\r |
f6c49d38 |
287 | goto end;\r |
cc68a136 |
288 | }\r |
19954be1 |
289 | \r |
93f9619e |
290 | if (PicoIn.AHW & PAHW_32X) {\r |
fa8fb754 |
291 | PicoFrame32x(); // also does MCD+32X\r |
f6c49d38 |
292 | goto end;\r |
3e49ffd0 |
293 | }\r |
cc68a136 |
294 | \r |
93f9619e |
295 | if (PicoIn.AHW & PAHW_MCD) {\r |
fa8fb754 |
296 | PicoFrameMCD();\r |
f6c49d38 |
297 | goto end;\r |
974fdb5b |
298 | }\r |
299 | \r |
17bd69ad |
300 | //if(Pico.video.reg[12]&0x2) Pico.video.status ^= SR_ODD; // change odd bit in interlace mode\r |
cc68a136 |
301 | \r |
19954be1 |
302 | PicoFrameStart();\r |
2aa27095 |
303 | PicoFrameHints();\r |
f6c49d38 |
304 | \r |
305 | end:\r |
306 | pprof_end(frame);\r |
cc68a136 |
307 | }\r |
308 | \r |
a12e0116 |
309 | void PicoFrameDrawOnly(void)\r |
310 | {\r |
93f9619e |
311 | if (!(PicoIn.AHW & PAHW_SMS)) {\r |
87b0845f |
312 | PicoFrameStart();\r |
d515a352 |
313 | PicoDrawSync(Pico.m.pal?239:223, 0, 0);\r |
87b0845f |
314 | } else {\r |
315 | PicoFrameDrawOnlyMS();\r |
316 | }\r |
a12e0116 |
317 | }\r |
318 | \r |
4609d0cd |
319 | void PicoGetInternal(pint_t which, pint_ret_t *r)\r |
8e5427a0 |
320 | {\r |
321 | switch (which)\r |
322 | {\r |
4609d0cd |
323 | case PI_ROM: r->vptr = Pico.rom; break;\r |
324 | case PI_ISPAL: r->vint = Pico.m.pal; break;\r |
325 | case PI_IS40_CELL: r->vint = Pico.video.reg[12]&1; break;\r |
326 | case PI_IS240_LINES: r->vint = Pico.m.pal && (Pico.video.reg[1]&8); break;\r |
8e5427a0 |
327 | }\r |
8e5427a0 |
328 | }\r |
329 | \r |
6311a3ba |
330 | // vim:ts=2:sw=2:expandtab\r |