cff531af |
1 | /* |
2 | * common code for pico.c and cd/pico.c |
3 | * (C) notaz, 2007-2009 |
4 | * |
5 | * This work is licensed under the terms of MAME license. |
6 | * See COPYING file in the top-level directory. |
7 | */ |
8b99ab90 |
8 | |
69996cb7 |
9 | #define CYCLES_M68K_LINE 488 // suitable for both PAL/NTSC |
10 | #define CYCLES_M68K_VINT_LAG 68 |
11 | #define CYCLES_M68K_ASD 148 |
bf5fbbb4 |
12 | #define CYCLES_S68K_LINE 795 |
236990cf |
13 | #define CYCLES_S68K_VINT_LAG 111 |
bf5fbbb4 |
14 | #define CYCLES_S68K_ASD 241 |
69996cb7 |
15 | |
16 | // pad delay (for 6 button pads) |
17 | #define PAD_DELAY \ |
602133e1 |
18 | if (PicoOpt&POPT_6BTN_PAD) { \ |
69996cb7 |
19 | if(Pico.m.padDelay[0]++ > 25) Pico.m.padTHPhase[0]=0; \ |
20 | if(Pico.m.padDelay[1]++ > 25) Pico.m.padTHPhase[1]=0; \ |
21 | } |
22 | |
bf5fbbb4 |
23 | // CPUS_RUN |
c987bb5c |
24 | #ifndef CPUS_RUN |
538a6098 |
25 | #define CPUS_RUN(m68k_cycles,s68k_cycles) \ |
c987bb5c |
26 | SekRunM68k(m68k_cycles) |
bf5fbbb4 |
27 | #endif |
28 | |
ed4402a7 |
29 | static __inline void SekRunM68k(int cyc) |
30 | { |
31 | int cyc_do; |
32 | pprof_start(m68k); |
19886062 |
33 | pevt_log_m68k_o(EVT_RUN_START); |
ed4402a7 |
34 | |
35 | SekCycleAim+=cyc; |
19886062 |
36 | if ((cyc_do=SekCycleAim-SekCycleCnt) <= 0) |
37 | goto out; |
38 | |
ed4402a7 |
39 | #if defined(EMU_CORE_DEBUG) |
40 | // this means we do run-compare |
41 | SekCycleCnt+=CM_compareRun(cyc_do, 0); |
42 | #elif defined(EMU_C68K) |
43 | PicoCpuCM68k.cycles=cyc_do; |
44 | CycloneRun(&PicoCpuCM68k); |
45 | SekCycleCnt+=cyc_do-PicoCpuCM68k.cycles; |
46 | #elif defined(EMU_M68K) |
47 | SekCycleCnt+=m68k_execute(cyc_do); |
48 | #elif defined(EMU_F68K) |
3e5b912c |
49 | SekCycleCnt+=fm68k_emulate(cyc_do, 0, 0); |
ed4402a7 |
50 | #endif |
51 | |
19886062 |
52 | out: |
12da51c2 |
53 | SekTrace(0); |
19886062 |
54 | pevt_log_m68k_o(EVT_RUN_END); |
ed4402a7 |
55 | pprof_end(m68k); |
56 | } |
57 | |
69996cb7 |
58 | static int PicoFrameHints(void) |
59 | { |
60 | struct PicoVideo *pv=&Pico.video; |
9761a7d0 |
61 | int lines, y, lines_vis = 224, line_sample, skip, vcnt_wrap; |
69996cb7 |
62 | int hint; // Hint counter |
63 | |
19886062 |
64 | pevt_log_m68k_o(EVT_FRAME_START); |
9761a7d0 |
65 | pv->v_counter = Pico.m.scanline = 0; |
538a6098 |
66 | |
602133e1 |
67 | if ((PicoOpt&POPT_ALT_RENDERER) && !PicoSkipFrame && (pv->reg[1]&0x40)) { // fast rend., display enabled |
03e4f2a3 |
68 | // draw a frame just after vblank in alternative render mode |
69 | // yes, this will cause 1 frame lag, but this is inaccurate mode anyway. |
70 | PicoFrameFull(); |
71 | #ifdef DRAW_FINISH_FUNC |
72 | DRAW_FINISH_FUNC(); |
73 | #endif |
74 | skip = 1; |
75 | } |
76 | else skip=PicoSkipFrame; |
77 | |
69996cb7 |
78 | if (Pico.m.pal) { |
69996cb7 |
79 | line_sample = 68; |
9761a7d0 |
80 | if (pv->reg[1]&8) lines_vis = 240; |
69996cb7 |
81 | } else { |
69996cb7 |
82 | line_sample = 93; |
83 | } |
84 | |
85 | SekCyclesReset(); |
4b9c5888 |
86 | z80_resetCycles(); |
bf5fbbb4 |
87 | #ifdef PICO_CD |
88 | SekCyclesResetS68k(); |
89 | #endif |
4b9c5888 |
90 | PsndDacLine = 0; |
7b3f44c6 |
91 | emustatus &= ~1; |
69996cb7 |
92 | |
93 | pv->status&=~0x88; // clear V-Int, come out of vblank |
94 | |
95 | hint=pv->reg[10]; // Load H-Int counter |
96 | //dprintf("-hint: %i", hint); |
97 | |
98 | // This is to make active scan longer (needed for Double Dragon 2, mainly) |
538a6098 |
99 | CPUS_RUN(CYCLES_M68K_ASD, CYCLES_S68K_ASD); |
69996cb7 |
100 | |
b6d7ac70 |
101 | for (y = 0; y < lines_vis; y++) |
69996cb7 |
102 | { |
9761a7d0 |
103 | pv->v_counter = Pico.m.scanline = y; |
104 | if ((pv->reg[12]&6) == 6) { // interlace mode 2 |
105 | pv->v_counter <<= 1; |
106 | pv->v_counter |= pv->v_counter >> 8; |
107 | pv->v_counter &= 0xff; |
108 | } |
69996cb7 |
109 | |
110 | // VDP FIFO |
111 | pv->lwrite_cnt -= 12; |
112 | if (pv->lwrite_cnt <= 0) { |
113 | pv->lwrite_cnt=0; |
114 | Pico.video.status|=0x200; |
115 | } |
116 | |
117 | PAD_DELAY |
bf5fbbb4 |
118 | #ifdef PICO_CD |
119 | check_cd_dma(); |
120 | #endif |
69996cb7 |
121 | |
122 | // H-Interrupts: |
123 | if (--hint < 0) // y <= lines_vis: Comix Zone, Golden Axe |
124 | { |
125 | hint=pv->reg[10]; // Reload H-Int counter |
126 | pv->pending_ints|=0x10; |
127 | if (pv->reg[0]&0x10) { |
128 | elprintf(EL_INTS, "hint: @ %06x [%i]", SekPc, SekCycleCnt); |
129 | SekInterrupt(4); |
130 | } |
131 | } |
132 | |
133 | // decide if we draw this line |
b6d7ac70 |
134 | if (!skip && (PicoOpt & POPT_ALT_RENDERER)) |
fad24893 |
135 | { |
b6d7ac70 |
136 | // find the right moment for frame renderer, when display is no longer blanked |
137 | if ((pv->reg[1]&0x40) || y > 100) { |
138 | PicoFrameFull(); |
fad24893 |
139 | #ifdef DRAW_FINISH_FUNC |
b6d7ac70 |
140 | DRAW_FINISH_FUNC(); |
fad24893 |
141 | #endif |
b6d7ac70 |
142 | skip = 1; |
fad24893 |
143 | } |
144 | } |
69996cb7 |
145 | |
69996cb7 |
146 | // get samples from sound chips |
7b3f44c6 |
147 | if ((y == 224 || y == line_sample) && PsndOut) |
4b9c5888 |
148 | { |
be297089 |
149 | if (Pico.m.z80Run && !Pico.m.z80_reset && (PicoOpt&POPT_EN_Z80)) |
4b9c5888 |
150 | PicoSyncZ80(SekCycleCnt); |
151 | if (ym2612.dacen && PsndDacLine <= y) |
152 | PsndDoDAC(y); |
a8fd6e37 |
153 | #ifdef PICO_32X |
19886062 |
154 | p32x_sync_sh2s(SekCyclesDoneT2()); |
a8fd6e37 |
155 | #endif |
7b3f44c6 |
156 | PsndGetSamples(y); |
4b9c5888 |
157 | } |
69996cb7 |
158 | |
159 | // Run scanline: |
160 | if (Pico.m.dma_xfers) SekCyclesBurn(CheckDMA()); |
538a6098 |
161 | CPUS_RUN(CYCLES_M68K_LINE, CYCLES_S68K_LINE); |
bf5fbbb4 |
162 | |
163 | #ifdef PICO_CD |
164 | update_chips(); |
017512f2 |
165 | #else |
b0677887 |
166 | if (PicoLineHook) PicoLineHook(); |
bf5fbbb4 |
167 | #endif |
19886062 |
168 | pevt_log_m68k_o(EVT_NEXT_LINE); |
69996cb7 |
169 | } |
170 | |
03e4f2a3 |
171 | if (!skip) |
b6d7ac70 |
172 | { |
173 | if (DrawScanline < y) |
174 | PicoDrawSync(y - 1, 0); |
175 | #ifdef DRAW_FINISH_FUNC |
03e4f2a3 |
176 | DRAW_FINISH_FUNC(); |
8ab3e3c1 |
177 | #endif |
b6d7ac70 |
178 | } |
8ab3e3c1 |
179 | |
947fb5f9 |
180 | // V-int line (224 or 240) |
181 | Pico.m.scanline = y; |
182 | pv->v_counter = 0xe0; // bad for 240 mode |
183 | if ((pv->reg[12]&6) == 6) pv->v_counter = 0xc1; |
184 | |
69996cb7 |
185 | // VDP FIFO |
186 | pv->lwrite_cnt=0; |
187 | Pico.video.status|=0x200; |
188 | |
5f9a0d16 |
189 | memcpy(PicoPadInt, PicoPad, sizeof(PicoPadInt)); |
69996cb7 |
190 | PAD_DELAY |
bf5fbbb4 |
191 | #ifdef PICO_CD |
192 | check_cd_dma(); |
193 | #endif |
69996cb7 |
194 | |
195 | // Last H-Int: |
196 | if (--hint < 0) |
197 | { |
198 | hint=pv->reg[10]; // Reload H-Int counter |
199 | pv->pending_ints|=0x10; |
200 | //printf("rhint: %i @ %06x [%i|%i]\n", hint, SekPc, y, SekCycleCnt); |
201 | if (pv->reg[0]&0x10) SekInterrupt(4); |
202 | } |
203 | |
69996cb7 |
204 | pv->status|=0x08; // go into vblank |
205 | pv->pending_ints|=0x20; |
206 | |
207 | // the following SekRun is there for several reasons: |
208 | // there must be a delay after vblank bit is set and irq is asserted (Mazin Saga) |
209 | // also delay between F bit (bit 7) is set in SR and IRQ happens (Ex-Mutants) |
210 | // also delay between last H-int and V-int (Golden Axe 3) |
236990cf |
211 | CPUS_RUN(CYCLES_M68K_VINT_LAG, CYCLES_S68K_VINT_LAG); |
4b9c5888 |
212 | |
69996cb7 |
213 | if (pv->reg[1]&0x20) { |
214 | elprintf(EL_INTS, "vint: @ %06x [%i]", SekPc, SekCycleCnt); |
215 | SekInterrupt(6); |
216 | } |
be297089 |
217 | if (Pico.m.z80Run && !Pico.m.z80_reset && (PicoOpt&POPT_EN_Z80)) { |
4b9c5888 |
218 | PicoSyncZ80(SekCycleCnt); |
583ab72c |
219 | elprintf(EL_INTS, "zint"); |
69996cb7 |
220 | z80_int(); |
583ab72c |
221 | } |
69996cb7 |
222 | |
a8fd6e37 |
223 | #ifdef PICO_32X |
19886062 |
224 | p32x_sync_sh2s(SekCyclesDoneT2()); |
a8fd6e37 |
225 | p32x_start_blank(); |
226 | #endif |
227 | |
69996cb7 |
228 | // get samples from sound chips |
7b3f44c6 |
229 | if (y == 224 && PsndOut) |
230 | { |
231 | if (ym2612.dacen && PsndDacLine <= y) |
232 | PsndDoDAC(y); |
233 | PsndGetSamples(y); |
234 | } |
69996cb7 |
235 | |
236 | // Run scanline: |
237 | if (Pico.m.dma_xfers) SekCyclesBurn(CheckDMA()); |
bf5fbbb4 |
238 | CPUS_RUN(CYCLES_M68K_LINE - CYCLES_M68K_VINT_LAG - CYCLES_M68K_ASD, |
236990cf |
239 | CYCLES_S68K_LINE - CYCLES_S68K_VINT_LAG - CYCLES_S68K_ASD); |
bf5fbbb4 |
240 | |
241 | #ifdef PICO_CD |
017512f2 |
242 | update_chips(); |
243 | #else |
b0677887 |
244 | if (PicoLineHook) PicoLineHook(); |
bf5fbbb4 |
245 | #endif |
19886062 |
246 | pevt_log_m68k_o(EVT_NEXT_LINE); |
69996cb7 |
247 | |
5e128c6d |
248 | lines = scanlines_total; |
249 | vcnt_wrap = Pico.m.pal ? 0x103 : 0xEB; // based on Gens, TODO: verify |
69996cb7 |
250 | |
b6d7ac70 |
251 | for (y++; y < lines; y++) |
69996cb7 |
252 | { |
9761a7d0 |
253 | pv->v_counter = Pico.m.scanline = y; |
254 | if (y >= vcnt_wrap) |
255 | pv->v_counter -= Pico.m.pal ? 56 : 6; |
256 | if ((pv->reg[12]&6) == 6) |
257 | pv->v_counter = (pv->v_counter << 1) | 1; |
258 | pv->v_counter &= 0xff; |
69996cb7 |
259 | |
260 | PAD_DELAY |
bf5fbbb4 |
261 | #ifdef PICO_CD |
262 | check_cd_dma(); |
263 | #endif |
69996cb7 |
264 | |
69996cb7 |
265 | // Run scanline: |
266 | if (Pico.m.dma_xfers) SekCyclesBurn(CheckDMA()); |
538a6098 |
267 | CPUS_RUN(CYCLES_M68K_LINE, CYCLES_S68K_LINE); |
bf5fbbb4 |
268 | |
269 | #ifdef PICO_CD |
270 | update_chips(); |
017512f2 |
271 | #else |
b0677887 |
272 | if (PicoLineHook) PicoLineHook(); |
bf5fbbb4 |
273 | #endif |
19886062 |
274 | pevt_log_m68k_o(EVT_NEXT_LINE); |
69996cb7 |
275 | } |
276 | |
4b9c5888 |
277 | // sync z80 |
be297089 |
278 | if (Pico.m.z80Run && !Pico.m.z80_reset && (PicoOpt&POPT_EN_Z80)) |
e53704e6 |
279 | PicoSyncZ80(Pico.m.pal ? 151809 : 127671); // cycles adjusted for converter |
4b9c5888 |
280 | if (PsndOut && ym2612.dacen && PsndDacLine <= lines-1) |
281 | PsndDoDAC(lines-1); |
282 | |
a8fd6e37 |
283 | #ifdef PICO_32X |
19886062 |
284 | p32x_sync_sh2s(SekCyclesDoneT2()); |
a8fd6e37 |
285 | #endif |
e53704e6 |
286 | timers_cycle(); |
287 | |
69996cb7 |
288 | return 0; |
289 | } |
290 | |
291 | #undef PAD_DELAY |
bf5fbbb4 |
292 | #undef CPUS_RUN |
69996cb7 |
293 | |