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 |
69996cb7 |
11 | |
12 | // pad delay (for 6 button pads) |
531a8f38 |
13 | #define PAD_DELAY() { \ |
14 | if(Pico.m.padDelay[0]++ > 25) Pico.m.padTHPhase[0]=0; \ |
15 | if(Pico.m.padDelay[1]++ > 25) Pico.m.padTHPhase[1]=0; \ |
16 | } |
69996cb7 |
17 | |
bf5fbbb4 |
18 | // CPUS_RUN |
c987bb5c |
19 | #ifndef CPUS_RUN |
ae214f1c |
20 | #define CPUS_RUN(m68k_cycles) \ |
c987bb5c |
21 | SekRunM68k(m68k_cycles) |
bf5fbbb4 |
22 | #endif |
23 | |
88fd63ad |
24 | // sync m68k to Pico.t.m68c_aim |
08769494 |
25 | static void SekSyncM68k(void) |
ed4402a7 |
26 | { |
27 | int cyc_do; |
28 | pprof_start(m68k); |
19886062 |
29 | pevt_log_m68k_o(EVT_RUN_START); |
ed4402a7 |
30 | |
88fd63ad |
31 | while ((cyc_do = Pico.t.m68c_aim - Pico.t.m68c_cnt) > 0) { |
32 | Pico.t.m68c_cnt += cyc_do; |
ae214f1c |
33 | |
34 | #if defined(EMU_C68K) |
35 | PicoCpuCM68k.cycles = cyc_do; |
36 | CycloneRun(&PicoCpuCM68k); |
88fd63ad |
37 | Pico.t.m68c_cnt -= PicoCpuCM68k.cycles; |
ed4402a7 |
38 | #elif defined(EMU_M68K) |
88fd63ad |
39 | Pico.t.m68c_cnt += m68k_execute(cyc_do) - cyc_do; |
ed4402a7 |
40 | #elif defined(EMU_F68K) |
88fd63ad |
41 | Pico.t.m68c_cnt += fm68k_emulate(cyc_do, 0) - cyc_do; |
ed4402a7 |
42 | #endif |
ae214f1c |
43 | } |
44 | |
45 | SekCyclesLeft = 0; |
ed4402a7 |
46 | |
12da51c2 |
47 | SekTrace(0); |
19886062 |
48 | pevt_log_m68k_o(EVT_RUN_END); |
ed4402a7 |
49 | pprof_end(m68k); |
50 | } |
51 | |
08769494 |
52 | static inline void SekRunM68k(int cyc) |
53 | { |
88fd63ad |
54 | Pico.t.m68c_aim += cyc; |
55 | cyc = Pico.t.m68c_aim - Pico.t.m68c_cnt; |
e42a47e2 |
56 | if (cyc <= 0) |
57 | return; |
88fd63ad |
58 | Pico.t.m68c_cnt += cyc >> 6; // refresh slowdowns |
08769494 |
59 | SekSyncM68k(); |
60 | } |
61 | |
e42a47e2 |
62 | static void do_hint(struct PicoVideo *pv) |
63 | { |
64 | pv->pending_ints |= 0x10; |
65 | if (pv->reg[0] & 0x10) { |
66 | elprintf(EL_INTS, "hint: @ %06x [%u]", SekPc, SekCyclesDone()); |
67 | SekInterrupt(4); |
68 | } |
69 | } |
70 | |
334f00e2 |
71 | static void do_timing_hacks_as(struct PicoVideo *pv, int vdp_slots) |
72 | { |
73 | pv->lwrite_cnt += vdp_slots - Pico.m.dma_xfers * 2; // wrong *2 |
74 | if (pv->lwrite_cnt > vdp_slots) |
75 | pv->lwrite_cnt = vdp_slots; |
76 | else if (pv->lwrite_cnt < 0) |
77 | pv->lwrite_cnt = 0; |
78 | if (Pico.m.dma_xfers) |
79 | SekCyclesBurn(CheckDMA()); |
80 | } |
81 | |
82 | static void do_timing_hacks_vb(void) |
83 | { |
84 | if (Pico.m.dma_xfers) |
85 | SekCyclesBurn(CheckDMA()); |
86 | } |
87 | |
69996cb7 |
88 | static int PicoFrameHints(void) |
89 | { |
e42a47e2 |
90 | struct PicoVideo *pv = &Pico.video; |
91 | int line_sample = Pico.m.pal ? 68 : 93; |
334f00e2 |
92 | int vdp_slots = (Pico.video.reg[12] & 1) ? 18 : 16; |
e42a47e2 |
93 | int lines, y, lines_vis, skip; |
94 | int vcnt_wrap, vcnt_adj; |
ae214f1c |
95 | unsigned int cycles; |
69996cb7 |
96 | int hint; // Hint counter |
97 | |
19886062 |
98 | pevt_log_m68k_o(EVT_FRAME_START); |
538a6098 |
99 | |
602133e1 |
100 | if ((PicoOpt&POPT_ALT_RENDERER) && !PicoSkipFrame && (pv->reg[1]&0x40)) { // fast rend., display enabled |
03e4f2a3 |
101 | // draw a frame just after vblank in alternative render mode |
102 | // yes, this will cause 1 frame lag, but this is inaccurate mode anyway. |
103 | PicoFrameFull(); |
104 | #ifdef DRAW_FINISH_FUNC |
105 | DRAW_FINISH_FUNC(); |
106 | #endif |
107 | skip = 1; |
108 | } |
109 | else skip=PicoSkipFrame; |
110 | |
88fd63ad |
111 | Pico.t.m68c_frame_start = SekCyclesDone(); |
3162a710 |
112 | pv->v_counter = Pico.m.scanline = 0; |
4b9c5888 |
113 | z80_resetCycles(); |
4f2cdbf5 |
114 | PsndStartFrame(); |
69996cb7 |
115 | |
e42a47e2 |
116 | // Load H-Int counter |
117 | hint = (pv->status & PVS_ACTIVE) ? pv->hint_cnt : pv->reg[10]; |
69996cb7 |
118 | |
e42a47e2 |
119 | pv->status |= PVS_ACTIVE; |
69996cb7 |
120 | |
e42a47e2 |
121 | for (y = 0; ; y++) |
69996cb7 |
122 | { |
9761a7d0 |
123 | pv->v_counter = Pico.m.scanline = y; |
124 | if ((pv->reg[12]&6) == 6) { // interlace mode 2 |
125 | pv->v_counter <<= 1; |
126 | pv->v_counter |= pv->v_counter >> 8; |
127 | pv->v_counter &= 0xff; |
128 | } |
69996cb7 |
129 | |
e42a47e2 |
130 | if ((y == 224 && !(pv->reg[1] & 8)) || y == 240) |
131 | break; |
132 | |
531a8f38 |
133 | PAD_DELAY(); |
69996cb7 |
134 | |
135 | // H-Interrupts: |
e42a47e2 |
136 | if (--hint < 0) |
69996cb7 |
137 | { |
e42a47e2 |
138 | hint = pv->reg[10]; // Reload H-Int counter |
139 | do_hint(pv); |
69996cb7 |
140 | } |
141 | |
142 | // decide if we draw this line |
b6d7ac70 |
143 | if (!skip && (PicoOpt & POPT_ALT_RENDERER)) |
fad24893 |
144 | { |
b6d7ac70 |
145 | // find the right moment for frame renderer, when display is no longer blanked |
146 | if ((pv->reg[1]&0x40) || y > 100) { |
147 | PicoFrameFull(); |
fad24893 |
148 | #ifdef DRAW_FINISH_FUNC |
b6d7ac70 |
149 | DRAW_FINISH_FUNC(); |
fad24893 |
150 | #endif |
b6d7ac70 |
151 | skip = 1; |
fad24893 |
152 | } |
153 | } |
69996cb7 |
154 | |
69996cb7 |
155 | // get samples from sound chips |
7b3f44c6 |
156 | if ((y == 224 || y == line_sample) && PsndOut) |
4b9c5888 |
157 | { |
ae214f1c |
158 | cycles = SekCyclesDone(); |
159 | |
be297089 |
160 | if (Pico.m.z80Run && !Pico.m.z80_reset && (PicoOpt&POPT_EN_Z80)) |
ae214f1c |
161 | PicoSyncZ80(cycles); |
ae214f1c |
162 | #ifdef PICO_CD |
fa8fb754 |
163 | if (PicoAHW & PAHW_MCD) |
164 | pcd_sync_s68k(cycles, 0); |
ae214f1c |
165 | #endif |
a8fd6e37 |
166 | #ifdef PICO_32X |
ae214f1c |
167 | p32x_sync_sh2s(cycles); |
a8fd6e37 |
168 | #endif |
7b3f44c6 |
169 | PsndGetSamples(y); |
4b9c5888 |
170 | } |
69996cb7 |
171 | |
172 | // Run scanline: |
88fd63ad |
173 | Pico.t.m68c_line_start = SekCyclesDone(); |
334f00e2 |
174 | do_timing_hacks_as(pv, vdp_slots); |
ae214f1c |
175 | CPUS_RUN(CYCLES_M68K_LINE); |
bf5fbbb4 |
176 | |
b0677887 |
177 | if (PicoLineHook) PicoLineHook(); |
19886062 |
178 | pevt_log_m68k_o(EVT_NEXT_LINE); |
69996cb7 |
179 | } |
180 | |
e42a47e2 |
181 | lines_vis = (pv->reg[1] & 8) ? 240 : 224; |
182 | if (y == lines_vis) |
183 | pv->status &= ~PVS_ACTIVE; |
184 | |
03e4f2a3 |
185 | if (!skip) |
b6d7ac70 |
186 | { |
ea38612f |
187 | if (Pico.est.DrawScanline < y) |
b6d7ac70 |
188 | PicoDrawSync(y - 1, 0); |
189 | #ifdef DRAW_FINISH_FUNC |
03e4f2a3 |
190 | DRAW_FINISH_FUNC(); |
8ab3e3c1 |
191 | #endif |
b6d7ac70 |
192 | } |
8ab3e3c1 |
193 | |
69996cb7 |
194 | // VDP FIFO |
e42a47e2 |
195 | pv->lwrite_cnt = 0; |
196 | Pico.video.status |= SR_EMPT; |
69996cb7 |
197 | |
5f9a0d16 |
198 | memcpy(PicoPadInt, PicoPad, sizeof(PicoPadInt)); |
531a8f38 |
199 | PAD_DELAY(); |
69996cb7 |
200 | |
e42a47e2 |
201 | // Last H-Int (normally): |
69996cb7 |
202 | if (--hint < 0) |
203 | { |
e42a47e2 |
204 | hint = pv->reg[10]; // Reload H-Int counter |
205 | do_hint(pv); |
69996cb7 |
206 | } |
207 | |
e42a47e2 |
208 | pv->status |= SR_VB; // go into vblank |
209 | pv->pending_ints |= 0x20; |
69996cb7 |
210 | |
211 | // the following SekRun is there for several reasons: |
212 | // there must be a delay after vblank bit is set and irq is asserted (Mazin Saga) |
213 | // also delay between F bit (bit 7) is set in SR and IRQ happens (Ex-Mutants) |
214 | // also delay between last H-int and V-int (Golden Axe 3) |
88fd63ad |
215 | Pico.t.m68c_line_start = SekCyclesDone(); |
334f00e2 |
216 | do_timing_hacks_vb(); |
ae214f1c |
217 | CPUS_RUN(CYCLES_M68K_VINT_LAG); |
4b9c5888 |
218 | |
e42a47e2 |
219 | if (pv->reg[1] & 0x20) { |
220 | elprintf(EL_INTS, "vint: @ %06x [%u]", SekPc, SekCyclesDone()); |
69996cb7 |
221 | SekInterrupt(6); |
222 | } |
ae214f1c |
223 | |
224 | cycles = SekCyclesDone(); |
be297089 |
225 | if (Pico.m.z80Run && !Pico.m.z80_reset && (PicoOpt&POPT_EN_Z80)) { |
ae214f1c |
226 | PicoSyncZ80(cycles); |
583ab72c |
227 | elprintf(EL_INTS, "zint"); |
69996cb7 |
228 | z80_int(); |
583ab72c |
229 | } |
69996cb7 |
230 | |
ae214f1c |
231 | #ifdef PICO_CD |
fa8fb754 |
232 | if (PicoAHW & PAHW_MCD) |
233 | pcd_sync_s68k(cycles, 0); |
ae214f1c |
234 | #endif |
a8fd6e37 |
235 | #ifdef PICO_32X |
ae214f1c |
236 | p32x_sync_sh2s(cycles); |
a8fd6e37 |
237 | p32x_start_blank(); |
238 | #endif |
239 | |
69996cb7 |
240 | // get samples from sound chips |
7b3f44c6 |
241 | if (y == 224 && PsndOut) |
7b3f44c6 |
242 | PsndGetSamples(y); |
69996cb7 |
243 | |
244 | // Run scanline: |
e42a47e2 |
245 | CPUS_RUN(CYCLES_M68K_LINE - CYCLES_M68K_VINT_LAG); |
bf5fbbb4 |
246 | |
b0677887 |
247 | if (PicoLineHook) PicoLineHook(); |
19886062 |
248 | pevt_log_m68k_o(EVT_NEXT_LINE); |
69996cb7 |
249 | |
e42a47e2 |
250 | if (Pico.m.pal) { |
251 | lines = 313; |
252 | vcnt_wrap = 0x103; |
253 | vcnt_adj = 57; |
254 | } |
255 | else { |
256 | lines = 262; |
257 | vcnt_wrap = 0xEB; |
258 | vcnt_adj = 6; |
259 | } |
69996cb7 |
260 | |
e42a47e2 |
261 | for (y++; y < lines - 1; y++) |
69996cb7 |
262 | { |
9761a7d0 |
263 | pv->v_counter = Pico.m.scanline = y; |
264 | if (y >= vcnt_wrap) |
e42a47e2 |
265 | pv->v_counter -= vcnt_adj; |
9761a7d0 |
266 | if ((pv->reg[12]&6) == 6) |
267 | pv->v_counter = (pv->v_counter << 1) | 1; |
268 | pv->v_counter &= 0xff; |
69996cb7 |
269 | |
531a8f38 |
270 | PAD_DELAY(); |
69996cb7 |
271 | |
e42a47e2 |
272 | if ((pv->status & PVS_ACTIVE) && --hint < 0) |
273 | { |
274 | hint = pv->reg[10]; // Reload H-Int counter |
275 | do_hint(pv); |
276 | } |
277 | |
69996cb7 |
278 | // Run scanline: |
88fd63ad |
279 | Pico.t.m68c_line_start = SekCyclesDone(); |
334f00e2 |
280 | do_timing_hacks_vb(); |
ae214f1c |
281 | CPUS_RUN(CYCLES_M68K_LINE); |
bf5fbbb4 |
282 | |
b0677887 |
283 | if (PicoLineHook) PicoLineHook(); |
19886062 |
284 | pevt_log_m68k_o(EVT_NEXT_LINE); |
69996cb7 |
285 | } |
286 | |
e42a47e2 |
287 | pv->status &= ~SR_VB; |
288 | |
289 | // last scanline |
290 | Pico.m.scanline = y; |
291 | pv->v_counter = 0xff; |
334f00e2 |
292 | pv->lwrite_cnt = 0; |
e42a47e2 |
293 | |
294 | PAD_DELAY(); |
295 | |
296 | if ((pv->status & PVS_ACTIVE) && --hint < 0) |
297 | { |
298 | hint = pv->reg[10]; // Reload H-Int counter |
299 | do_hint(pv); |
300 | } |
301 | |
302 | // Run scanline: |
88fd63ad |
303 | Pico.t.m68c_line_start = SekCyclesDone(); |
334f00e2 |
304 | do_timing_hacks_as(pv, vdp_slots); |
e42a47e2 |
305 | CPUS_RUN(CYCLES_M68K_LINE); |
306 | |
307 | if (PicoLineHook) PicoLineHook(); |
308 | pevt_log_m68k_o(EVT_NEXT_LINE); |
309 | |
ae214f1c |
310 | // sync cpus |
311 | cycles = SekCyclesDone(); |
be297089 |
312 | if (Pico.m.z80Run && !Pico.m.z80_reset && (PicoOpt&POPT_EN_Z80)) |
ae214f1c |
313 | PicoSyncZ80(cycles); |
4f2cdbf5 |
314 | if (PsndOut && ym2612.dacen && PsndDacLine < lines) |
315 | PsndDoDAC(lines - 1); |
5d638db0 |
316 | if (PsndOut && PsndPsgLine < lines) |
317 | PsndDoPSG(lines - 1); |
4b9c5888 |
318 | |
ae214f1c |
319 | #ifdef PICO_CD |
fa8fb754 |
320 | if (PicoAHW & PAHW_MCD) |
321 | pcd_sync_s68k(cycles, 0); |
ae214f1c |
322 | #endif |
a8fd6e37 |
323 | #ifdef PICO_32X |
ae214f1c |
324 | p32x_sync_sh2s(cycles); |
a8fd6e37 |
325 | #endif |
e53704e6 |
326 | timers_cycle(); |
327 | |
e42a47e2 |
328 | pv->hint_cnt = hint; |
329 | |
69996cb7 |
330 | return 0; |
331 | } |
332 | |
333 | #undef PAD_DELAY |
bf5fbbb4 |
334 | #undef CPUS_RUN |
69996cb7 |
335 | |
ae214f1c |
336 | // vim:shiftwidth=2:ts=2:expandtab |