cff531af |
1 | /* |
89dbbf2b |
2 | * common code for base/cd/32x |
3 | * (C) notaz, 2007-2009,2013 |
cff531af |
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 |
69996cb7 |
12 | |
13 | // pad delay (for 6 button pads) |
531a8f38 |
14 | #define PAD_DELAY() { \ |
15 | if(Pico.m.padDelay[0]++ > 25) Pico.m.padTHPhase[0]=0; \ |
16 | if(Pico.m.padDelay[1]++ > 25) Pico.m.padTHPhase[1]=0; \ |
17 | } |
69996cb7 |
18 | |
bf5fbbb4 |
19 | // CPUS_RUN |
c987bb5c |
20 | #ifndef CPUS_RUN |
ae214f1c |
21 | #define CPUS_RUN(m68k_cycles) \ |
c987bb5c |
22 | SekRunM68k(m68k_cycles) |
bf5fbbb4 |
23 | #endif |
24 | |
08769494 |
25 | // sync m68k to SekCycleAim |
26 | static void SekSyncM68k(void) |
ed4402a7 |
27 | { |
28 | int cyc_do; |
29 | pprof_start(m68k); |
19886062 |
30 | pevt_log_m68k_o(EVT_RUN_START); |
ed4402a7 |
31 | |
ae214f1c |
32 | while ((cyc_do = SekCycleAim - SekCycleCnt) > 0) { |
33 | SekCycleCnt += cyc_do; |
34 | |
35 | #if defined(EMU_C68K) |
36 | PicoCpuCM68k.cycles = cyc_do; |
37 | CycloneRun(&PicoCpuCM68k); |
38 | SekCycleCnt -= PicoCpuCM68k.cycles; |
ed4402a7 |
39 | #elif defined(EMU_M68K) |
ae214f1c |
40 | SekCycleCnt += m68k_execute(cyc_do) - cyc_do; |
ed4402a7 |
41 | #elif defined(EMU_F68K) |
ae214f1c |
42 | SekCycleCnt += fm68k_emulate(cyc_do, 0, 0) - cyc_do; |
ed4402a7 |
43 | #endif |
ae214f1c |
44 | } |
45 | |
46 | SekCyclesLeft = 0; |
ed4402a7 |
47 | |
12da51c2 |
48 | SekTrace(0); |
19886062 |
49 | pevt_log_m68k_o(EVT_RUN_END); |
ed4402a7 |
50 | pprof_end(m68k); |
51 | } |
52 | |
08769494 |
53 | static inline void SekRunM68k(int cyc) |
54 | { |
55 | SekCycleAim += cyc; |
56 | SekSyncM68k(); |
57 | } |
58 | |
69996cb7 |
59 | static int PicoFrameHints(void) |
60 | { |
61 | struct PicoVideo *pv=&Pico.video; |
9761a7d0 |
62 | int lines, y, lines_vis = 224, line_sample, skip, vcnt_wrap; |
ae214f1c |
63 | unsigned int cycles; |
69996cb7 |
64 | int hint; // Hint counter |
65 | |
19886062 |
66 | pevt_log_m68k_o(EVT_FRAME_START); |
9761a7d0 |
67 | pv->v_counter = Pico.m.scanline = 0; |
538a6098 |
68 | |
602133e1 |
69 | if ((PicoOpt&POPT_ALT_RENDERER) && !PicoSkipFrame && (pv->reg[1]&0x40)) { // fast rend., display enabled |
03e4f2a3 |
70 | // draw a frame just after vblank in alternative render mode |
71 | // yes, this will cause 1 frame lag, but this is inaccurate mode anyway. |
72 | PicoFrameFull(); |
73 | #ifdef DRAW_FINISH_FUNC |
74 | DRAW_FINISH_FUNC(); |
75 | #endif |
76 | skip = 1; |
77 | } |
78 | else skip=PicoSkipFrame; |
79 | |
69996cb7 |
80 | if (Pico.m.pal) { |
69996cb7 |
81 | line_sample = 68; |
9761a7d0 |
82 | if (pv->reg[1]&8) lines_vis = 240; |
69996cb7 |
83 | } else { |
69996cb7 |
84 | line_sample = 93; |
85 | } |
86 | |
4b9c5888 |
87 | z80_resetCycles(); |
4b9c5888 |
88 | PsndDacLine = 0; |
7b3f44c6 |
89 | emustatus &= ~1; |
69996cb7 |
90 | |
91 | pv->status&=~0x88; // clear V-Int, come out of vblank |
92 | |
93 | hint=pv->reg[10]; // Load H-Int counter |
94 | //dprintf("-hint: %i", hint); |
95 | |
96 | // This is to make active scan longer (needed for Double Dragon 2, mainly) |
ae214f1c |
97 | CPUS_RUN(CYCLES_M68K_ASD); |
69996cb7 |
98 | |
b6d7ac70 |
99 | for (y = 0; y < lines_vis; y++) |
69996cb7 |
100 | { |
9761a7d0 |
101 | pv->v_counter = Pico.m.scanline = y; |
102 | if ((pv->reg[12]&6) == 6) { // interlace mode 2 |
103 | pv->v_counter <<= 1; |
104 | pv->v_counter |= pv->v_counter >> 8; |
105 | pv->v_counter &= 0xff; |
106 | } |
69996cb7 |
107 | |
108 | // VDP FIFO |
109 | pv->lwrite_cnt -= 12; |
110 | if (pv->lwrite_cnt <= 0) { |
111 | pv->lwrite_cnt=0; |
112 | Pico.video.status|=0x200; |
113 | } |
114 | |
531a8f38 |
115 | PAD_DELAY(); |
69996cb7 |
116 | |
117 | // H-Interrupts: |
118 | if (--hint < 0) // y <= lines_vis: Comix Zone, Golden Axe |
119 | { |
120 | hint=pv->reg[10]; // Reload H-Int counter |
121 | pv->pending_ints|=0x10; |
122 | if (pv->reg[0]&0x10) { |
ae214f1c |
123 | elprintf(EL_INTS, "hint: @ %06x [%i]", SekPc, SekCyclesDone()); |
69996cb7 |
124 | SekInterrupt(4); |
125 | } |
126 | } |
127 | |
128 | // decide if we draw this line |
b6d7ac70 |
129 | if (!skip && (PicoOpt & POPT_ALT_RENDERER)) |
fad24893 |
130 | { |
b6d7ac70 |
131 | // find the right moment for frame renderer, when display is no longer blanked |
132 | if ((pv->reg[1]&0x40) || y > 100) { |
133 | PicoFrameFull(); |
fad24893 |
134 | #ifdef DRAW_FINISH_FUNC |
b6d7ac70 |
135 | DRAW_FINISH_FUNC(); |
fad24893 |
136 | #endif |
b6d7ac70 |
137 | skip = 1; |
fad24893 |
138 | } |
139 | } |
69996cb7 |
140 | |
69996cb7 |
141 | // get samples from sound chips |
7b3f44c6 |
142 | if ((y == 224 || y == line_sample) && PsndOut) |
4b9c5888 |
143 | { |
ae214f1c |
144 | cycles = SekCyclesDone(); |
145 | |
be297089 |
146 | if (Pico.m.z80Run && !Pico.m.z80_reset && (PicoOpt&POPT_EN_Z80)) |
ae214f1c |
147 | PicoSyncZ80(cycles); |
4b9c5888 |
148 | if (ym2612.dacen && PsndDacLine <= y) |
149 | PsndDoDAC(y); |
ae214f1c |
150 | #ifdef PICO_CD |
08769494 |
151 | pcd_sync_s68k(cycles, 0); |
ae214f1c |
152 | #endif |
a8fd6e37 |
153 | #ifdef PICO_32X |
ae214f1c |
154 | p32x_sync_sh2s(cycles); |
a8fd6e37 |
155 | #endif |
7b3f44c6 |
156 | PsndGetSamples(y); |
4b9c5888 |
157 | } |
69996cb7 |
158 | |
159 | // Run scanline: |
53f948c9 |
160 | line_base_cycles = SekCyclesDone(); |
69996cb7 |
161 | if (Pico.m.dma_xfers) SekCyclesBurn(CheckDMA()); |
ae214f1c |
162 | CPUS_RUN(CYCLES_M68K_LINE); |
bf5fbbb4 |
163 | |
b0677887 |
164 | if (PicoLineHook) PicoLineHook(); |
19886062 |
165 | pevt_log_m68k_o(EVT_NEXT_LINE); |
69996cb7 |
166 | } |
167 | |
03e4f2a3 |
168 | if (!skip) |
b6d7ac70 |
169 | { |
170 | if (DrawScanline < y) |
171 | PicoDrawSync(y - 1, 0); |
172 | #ifdef DRAW_FINISH_FUNC |
03e4f2a3 |
173 | DRAW_FINISH_FUNC(); |
8ab3e3c1 |
174 | #endif |
b6d7ac70 |
175 | } |
8ab3e3c1 |
176 | |
947fb5f9 |
177 | // V-int line (224 or 240) |
178 | Pico.m.scanline = y; |
179 | pv->v_counter = 0xe0; // bad for 240 mode |
180 | if ((pv->reg[12]&6) == 6) pv->v_counter = 0xc1; |
181 | |
69996cb7 |
182 | // VDP FIFO |
183 | pv->lwrite_cnt=0; |
184 | Pico.video.status|=0x200; |
185 | |
5f9a0d16 |
186 | memcpy(PicoPadInt, PicoPad, sizeof(PicoPadInt)); |
531a8f38 |
187 | PAD_DELAY(); |
69996cb7 |
188 | |
189 | // Last H-Int: |
190 | if (--hint < 0) |
191 | { |
192 | hint=pv->reg[10]; // Reload H-Int counter |
193 | pv->pending_ints|=0x10; |
ae214f1c |
194 | //printf("rhint: %i @ %06x [%i|%i]\n", hint, SekPc, y, SekCyclesDone()); |
69996cb7 |
195 | if (pv->reg[0]&0x10) SekInterrupt(4); |
196 | } |
197 | |
69996cb7 |
198 | pv->status|=0x08; // go into vblank |
199 | pv->pending_ints|=0x20; |
200 | |
201 | // the following SekRun is there for several reasons: |
202 | // there must be a delay after vblank bit is set and irq is asserted (Mazin Saga) |
203 | // also delay between F bit (bit 7) is set in SR and IRQ happens (Ex-Mutants) |
204 | // also delay between last H-int and V-int (Golden Axe 3) |
53f948c9 |
205 | line_base_cycles = SekCyclesDone(); |
a4dfdb6d |
206 | if (Pico.m.dma_xfers) SekCyclesBurn(CheckDMA()); |
ae214f1c |
207 | CPUS_RUN(CYCLES_M68K_VINT_LAG); |
4b9c5888 |
208 | |
69996cb7 |
209 | if (pv->reg[1]&0x20) { |
ae214f1c |
210 | elprintf(EL_INTS, "vint: @ %06x [%i]", SekPc, SekCyclesDone()); |
69996cb7 |
211 | SekInterrupt(6); |
212 | } |
ae214f1c |
213 | |
214 | cycles = SekCyclesDone(); |
be297089 |
215 | if (Pico.m.z80Run && !Pico.m.z80_reset && (PicoOpt&POPT_EN_Z80)) { |
ae214f1c |
216 | PicoSyncZ80(cycles); |
583ab72c |
217 | elprintf(EL_INTS, "zint"); |
69996cb7 |
218 | z80_int(); |
583ab72c |
219 | } |
69996cb7 |
220 | |
ae214f1c |
221 | #ifdef PICO_CD |
08769494 |
222 | pcd_sync_s68k(cycles, 0); |
ae214f1c |
223 | #endif |
a8fd6e37 |
224 | #ifdef PICO_32X |
ae214f1c |
225 | p32x_sync_sh2s(cycles); |
a8fd6e37 |
226 | p32x_start_blank(); |
227 | #endif |
228 | |
69996cb7 |
229 | // get samples from sound chips |
7b3f44c6 |
230 | if (y == 224 && PsndOut) |
231 | { |
232 | if (ym2612.dacen && PsndDacLine <= y) |
233 | PsndDoDAC(y); |
234 | PsndGetSamples(y); |
235 | } |
69996cb7 |
236 | |
237 | // Run scanline: |
ae214f1c |
238 | CPUS_RUN(CYCLES_M68K_LINE - CYCLES_M68K_VINT_LAG - CYCLES_M68K_ASD); |
bf5fbbb4 |
239 | |
b0677887 |
240 | if (PicoLineHook) PicoLineHook(); |
19886062 |
241 | pevt_log_m68k_o(EVT_NEXT_LINE); |
69996cb7 |
242 | |
5e128c6d |
243 | lines = scanlines_total; |
244 | vcnt_wrap = Pico.m.pal ? 0x103 : 0xEB; // based on Gens, TODO: verify |
69996cb7 |
245 | |
b6d7ac70 |
246 | for (y++; y < lines; y++) |
69996cb7 |
247 | { |
9761a7d0 |
248 | pv->v_counter = Pico.m.scanline = y; |
249 | if (y >= vcnt_wrap) |
250 | pv->v_counter -= Pico.m.pal ? 56 : 6; |
251 | if ((pv->reg[12]&6) == 6) |
252 | pv->v_counter = (pv->v_counter << 1) | 1; |
253 | pv->v_counter &= 0xff; |
69996cb7 |
254 | |
531a8f38 |
255 | PAD_DELAY(); |
69996cb7 |
256 | |
69996cb7 |
257 | // Run scanline: |
53f948c9 |
258 | line_base_cycles = SekCyclesDone(); |
69996cb7 |
259 | if (Pico.m.dma_xfers) SekCyclesBurn(CheckDMA()); |
ae214f1c |
260 | CPUS_RUN(CYCLES_M68K_LINE); |
bf5fbbb4 |
261 | |
b0677887 |
262 | if (PicoLineHook) PicoLineHook(); |
19886062 |
263 | pevt_log_m68k_o(EVT_NEXT_LINE); |
69996cb7 |
264 | } |
265 | |
ae214f1c |
266 | // sync cpus |
267 | cycles = SekCyclesDone(); |
be297089 |
268 | if (Pico.m.z80Run && !Pico.m.z80_reset && (PicoOpt&POPT_EN_Z80)) |
ae214f1c |
269 | PicoSyncZ80(cycles); |
4b9c5888 |
270 | if (PsndOut && ym2612.dacen && PsndDacLine <= lines-1) |
271 | PsndDoDAC(lines-1); |
272 | |
ae214f1c |
273 | #ifdef PICO_CD |
08769494 |
274 | pcd_sync_s68k(cycles, 0); |
ae214f1c |
275 | #endif |
a8fd6e37 |
276 | #ifdef PICO_32X |
ae214f1c |
277 | p32x_sync_sh2s(cycles); |
a8fd6e37 |
278 | #endif |
e53704e6 |
279 | timers_cycle(); |
280 | |
69996cb7 |
281 | return 0; |
282 | } |
283 | |
284 | #undef PAD_DELAY |
bf5fbbb4 |
285 | #undef CPUS_RUN |
69996cb7 |
286 | |
ae214f1c |
287 | // vim:shiftwidth=2:ts=2:expandtab |