672ad671 |
1 | // (c) Copyright 2007 notaz, All rights reserved. |
cc68a136 |
2 | |
3 | |
4 | #include "../PicoInt.h" |
cc68a136 |
5 | |
6 | |
76276b0b |
7 | extern unsigned char formatted_bram[4*0x10]; |
89fa852d |
8 | extern unsigned int s68k_poll_adclk; |
9 | |
721cd396 |
10 | void (*PicoMCDopenTray)(void) = NULL; |
11 | int (*PicoMCDcloseTray)(void) = NULL; |
89fa852d |
12 | |
13 | #define dump_ram(ram,fname) \ |
14 | { \ |
15 | int i, d; \ |
16 | FILE *f; \ |
17 | \ |
18 | for (i = 0; i < sizeof(ram); i+=2) { \ |
19 | d = (ram[i]<<8) | ram[i+1]; \ |
20 | *(unsigned short *)(ram+i) = d; \ |
21 | } \ |
22 | f = fopen(fname, "wb"); \ |
23 | if (f) { \ |
24 | fwrite(ram, 1, sizeof(ram), f); \ |
25 | fclose(f); \ |
26 | } \ |
27 | for (i = 0; i < sizeof(ram); i+=2) { \ |
28 | d = (ram[i]<<8) | ram[i+1]; \ |
29 | *(unsigned short *)(ram+i) = d; \ |
30 | } \ |
31 | } |
cc68a136 |
32 | |
33 | |
eff55556 |
34 | PICO_INTERNAL int PicoInitMCD(void) |
cc68a136 |
35 | { |
36 | SekInitS68k(); |
37 | Init_CD_Driver(); |
38 | |
39 | return 0; |
40 | } |
41 | |
42 | |
eff55556 |
43 | PICO_INTERNAL void PicoExitMCD(void) |
cc68a136 |
44 | { |
45 | End_CD_Driver(); |
89fa852d |
46 | |
47 | //dump_ram(Pico_mcd->prg_ram, "prg.bin"); |
48 | //dump_ram(Pico.ram, "ram.bin"); |
cc68a136 |
49 | } |
50 | |
eff55556 |
51 | PICO_INTERNAL int PicoResetMCD(int hard) |
cc68a136 |
52 | { |
51a902ae |
53 | if (hard) { |
a4030801 |
54 | int fmt_size = sizeof(formatted_bram); |
55 | memset(Pico_mcd->prg_ram, 0, sizeof(Pico_mcd->prg_ram)); |
56 | memset(Pico_mcd->word_ram2M, 0, sizeof(Pico_mcd->word_ram2M)); |
57 | memset(Pico_mcd->pcm_ram, 0, sizeof(Pico_mcd->pcm_ram)); |
58 | memset(Pico_mcd->bram, 0, sizeof(Pico_mcd->bram)); |
59 | memcpy(Pico_mcd->bram + sizeof(Pico_mcd->bram) - fmt_size, formatted_bram, fmt_size); |
51a902ae |
60 | } |
61 | memset(Pico_mcd->s68k_regs, 0, sizeof(Pico_mcd->s68k_regs)); |
4f265db7 |
62 | memset(&Pico_mcd->pcm, 0, sizeof(Pico_mcd->pcm)); |
5c69a605 |
63 | memset(&Pico_mcd->m, 0, sizeof(Pico_mcd->m)); |
51a902ae |
64 | |
d1df8786 |
65 | *(unsigned int *)(Pico_mcd->bios + 0x70) = 0xffffffff; // reset hint vector (simplest way to implement reg6) |
c008977e |
66 | Pico_mcd->m.state_flags |= 1; // s68k reset pending |
672ad671 |
67 | Pico_mcd->s68k_regs[3] = 1; // 2M word RAM mode with m68k access after reset |
cc68a136 |
68 | |
cc68a136 |
69 | Reset_CD(); |
5c69a605 |
70 | LC89510_Reset(); |
51a902ae |
71 | gfx_cd_reset(); |
4ff2d527 |
72 | #ifdef _ASM_CD_MEMORY_C |
73 | PicoMemResetCD(1); |
00bd648e |
74 | //PicoMemResetCDdecode(1); // don't have to call this in 2M mode |
4ff2d527 |
75 | #endif |
cc68a136 |
76 | |
6cadc2da |
77 | // use SRam.data for RAM cart |
78 | if (SRam.data) free(SRam.data); |
79 | SRam.data = NULL; |
80 | if (PicoOpt&0x8000) |
81 | SRam.data = calloc(1, 0x12000); |
82 | |
cc68a136 |
83 | return 0; |
84 | } |
85 | |
eff55556 |
86 | static __inline void SekRunM68k(int cyc) |
cc68a136 |
87 | { |
88 | int cyc_do; |
89 | SekCycleAim+=cyc; |
90 | if((cyc_do=SekCycleAim-SekCycleCnt) < 0) return; |
b837b69b |
91 | #if defined(EMU_C68K) |
92 | PicoCpu.cycles=cyc_do; |
93 | CycloneRun(&PicoCpu); |
94 | SekCycleCnt+=cyc_do-PicoCpu.cycles; |
95 | #elif defined(EMU_M68K) |
cc68a136 |
96 | m68k_set_context(&PicoM68kCPU); |
97 | SekCycleCnt+=m68k_execute(cyc_do); |
98 | #endif |
99 | } |
100 | |
101 | static __inline void SekRunS68k(int cyc) |
102 | { |
103 | int cyc_do; |
104 | SekCycleAimS68k+=cyc; |
105 | if((cyc_do=SekCycleAimS68k-SekCycleCntS68k) < 0) return; |
b837b69b |
106 | #if defined(EMU_C68K) |
107 | PicoCpuS68k.cycles=cyc_do; |
108 | CycloneRun(&PicoCpuS68k); |
109 | SekCycleCntS68k+=cyc_do-PicoCpuS68k.cycles; |
110 | #elif defined(EMU_M68K) |
cc68a136 |
111 | m68k_set_context(&PicoS68kCPU); |
112 | SekCycleCntS68k+=m68k_execute(cyc_do); |
113 | #endif |
114 | } |
115 | |
7336a99a |
116 | #define PS_STEP_M68K ((488<<16)/20) // ~24 |
117 | //#define PS_STEP_S68K 13 |
68cba51e |
118 | |
a4030801 |
119 | #ifdef _ASM_CD_PICO_C |
120 | void SekRunPS(int cyc_m68k, int cyc_s68k); |
121 | #else |
68cba51e |
122 | static __inline void SekRunPS(int cyc_m68k, int cyc_s68k) |
123 | { |
7336a99a |
124 | int cycn, cycn_s68k, cyc_do; |
fb9bec94 |
125 | int ex; |
68cba51e |
126 | SekCycleAim+=cyc_m68k; |
127 | SekCycleAimS68k+=cyc_s68k; |
7336a99a |
128 | |
129 | // fprintf(stderr, "=== start %3i/%3i [%3i/%3i] {%05i.%i} ===\n", cyc_m68k, cyc_s68k, |
130 | // SekCycleAim-SekCycleCnt, SekCycleAimS68k-SekCycleCntS68k, Pico.m.frame_count, Pico.m.scanline); |
131 | |
132 | /* loop 488 downto 0 in steps of PS_STEP */ |
133 | for (cycn = (488<<16)-PS_STEP_M68K; cycn >= 0; cycn -= PS_STEP_M68K) |
134 | { |
135 | ex = 0; |
136 | cycn_s68k = (cycn + cycn/2 + cycn/8) >> 16; |
7336a99a |
137 | if ((cyc_do = SekCycleAim-SekCycleCnt-(cycn>>16)) > 0) { |
68cba51e |
138 | #if defined(EMU_C68K) |
7336a99a |
139 | PicoCpu.cycles = cyc_do; |
68cba51e |
140 | CycloneRun(&PicoCpu); |
7336a99a |
141 | SekCycleCnt += cyc_do - PicoCpu.cycles; |
68cba51e |
142 | #elif defined(EMU_M68K) |
143 | m68k_set_context(&PicoM68kCPU); |
7336a99a |
144 | SekCycleCnt += (ex = m68k_execute(cyc_do)); |
68cba51e |
145 | #endif |
7336a99a |
146 | } |
7336a99a |
147 | if ((cyc_do = SekCycleAimS68k-SekCycleCntS68k-cycn_s68k) > 0) { |
68cba51e |
148 | #if defined(EMU_C68K) |
7336a99a |
149 | PicoCpuS68k.cycles = cyc_do; |
68cba51e |
150 | CycloneRun(&PicoCpuS68k); |
7336a99a |
151 | SekCycleCntS68k += cyc_do - PicoCpuS68k.cycles; |
68cba51e |
152 | #elif defined(EMU_M68K) |
153 | m68k_set_context(&PicoS68kCPU); |
7336a99a |
154 | SekCycleCntS68k += (ex = m68k_execute(cyc_do)); |
68cba51e |
155 | #endif |
7336a99a |
156 | } |
68cba51e |
157 | } |
68cba51e |
158 | } |
7336a99a |
159 | #endif |
68cba51e |
160 | |
161 | |
bf098bc5 |
162 | static __inline void check_cd_dma(void) |
163 | { |
164 | int ddx; |
165 | |
c459aefd |
166 | if (!(Pico_mcd->scd.Status_CDC & 0x08)) return; |
bf098bc5 |
167 | |
168 | ddx = Pico_mcd->s68k_regs[4] & 7; |
169 | if (ddx < 2) return; // invalid |
c459aefd |
170 | if (ddx < 4) { |
171 | Pico_mcd->s68k_regs[4] |= 0x40; // Data set ready in host port |
172 | return; |
173 | } |
bf098bc5 |
174 | if (ddx == 6) return; // invalid |
175 | |
176 | Update_CDC_TRansfer(ddx); // now go and do the actual transfer |
177 | } |
178 | |
4f265db7 |
179 | static __inline void update_chips(void) |
180 | { |
181 | int counter_timer, int3_set; |
182 | int counter75hz_lim = Pico.m.pal ? 2080 : 2096; |
183 | |
184 | // 75Hz CDC update |
185 | if ((Pico_mcd->m.counter75hz+=10) >= counter75hz_lim) { |
186 | Pico_mcd->m.counter75hz -= counter75hz_lim; |
187 | Check_CD_Command(); |
188 | } |
189 | |
190 | // update timers |
191 | counter_timer = Pico.m.pal ? 0x21630 : 0x2121c; // 136752 : 135708; |
192 | Pico_mcd->m.timer_stopwatch += counter_timer; |
193 | if ((int3_set = Pico_mcd->s68k_regs[0x31])) { |
194 | Pico_mcd->m.timer_int3 -= counter_timer; |
195 | if (Pico_mcd->m.timer_int3 < 0) { |
196 | if (Pico_mcd->s68k_regs[0x33] & (1<<3)) { |
69996cb7 |
197 | elprintf(EL_INTS, "s68k: timer irq 3"); |
4f265db7 |
198 | SekInterruptS68k(3); |
199 | Pico_mcd->m.timer_int3 += int3_set << 16; |
200 | } |
201 | // is this really what happens if irq3 is masked out? |
202 | Pico_mcd->m.timer_int3 &= 0xffffff; |
203 | } |
204 | } |
205 | |
206 | // update gfx chip |
207 | if (Pico_mcd->rot_comp.Reg_58 & 0x8000) |
208 | gfx_cd_update(); |
89fa852d |
209 | |
210 | // delayed setting of DMNA bit (needed for Silpheed) |
211 | if (Pico_mcd->m.state_flags & 2) { |
212 | Pico_mcd->m.state_flags &= ~2; |
46969540 |
213 | if (!(Pico_mcd->s68k_regs[3] & 4)) { |
214 | Pico_mcd->s68k_regs[3] |= 2; |
215 | Pico_mcd->s68k_regs[3] &= ~1; |
89fa852d |
216 | #ifdef USE_POLL_DETECT |
46969540 |
217 | if ((s68k_poll_adclk&0xfe) == 2) { |
218 | SekSetStopS68k(0); s68k_poll_adclk = 0; |
219 | } |
89fa852d |
220 | #endif |
46969540 |
221 | } |
89fa852d |
222 | } |
4f265db7 |
223 | } |
224 | |
b837b69b |
225 | |
bf5fbbb4 |
226 | static __inline void getSamples(int y) |
cc68a136 |
227 | { |
bf5fbbb4 |
228 | int len = sound_render(0, PsndLen); |
229 | if (PicoWriteSound) PicoWriteSound(len); |
230 | // clear sound buffer |
231 | sound_clear(); |
232 | } |
cc68a136 |
233 | |
cc68a136 |
234 | |
bf5fbbb4 |
235 | #define PICO_CD |
236 | #include "../PicoFrameHints.c" |
cc68a136 |
237 | |
238 | |
eff55556 |
239 | PICO_INTERNAL int PicoFrameMCD(void) |
cc68a136 |
240 | { |
241 | if(!(PicoOpt&0x10)) |
242 | PicoFrameStart(); |
243 | |
bf5fbbb4 |
244 | PicoFrameHints(); |
cc68a136 |
245 | |
246 | return 0; |
247 | } |
248 | |
249 | |