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1 | #include "../PicoInt.h" |
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2 | #include "../sound/sn76496.h" |
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3 | |
4 | #ifndef UTYPES_DEFINED |
5 | typedef unsigned char u8; |
6 | typedef unsigned short u16; |
7 | typedef unsigned int u32; |
8 | #define UTYPES_DEFINED |
9 | #endif |
10 | |
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11 | |
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12 | // ----------------------------------------------------------------- |
13 | // Read Rom and read Ram |
14 | |
15 | static u32 PicoReadPico8(u32 a) |
16 | { |
17 | u32 d=0; |
18 | |
19 | if ((a&0xe00000)==0xe00000) { d = *(u8 *)(Pico.ram+((a^1)&0xffff)); goto end; } // Ram |
20 | if (a<Pico.romsize) { d = *(u8 *)(Pico.rom+(a^1)); goto end; } // Rom |
21 | |
22 | a&=0xffffff; |
23 | |
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24 | if ((a&0xfffff0)==0xc00000) { // VDP |
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25 | d=PicoVideoRead(a); |
26 | if ((a&1)==0) d>>=8; |
27 | goto end; |
28 | } |
29 | |
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30 | if ((a&0xffffe0)==0x800000) // Pico I/O |
31 | { |
32 | switch (a & 0x1f) |
33 | { |
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34 | case 0x01: d = PicoPicohw.r1; break; |
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35 | case 0x03: |
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36 | d = PicoPad[0]&0x1f; // d-pad |
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37 | d |= (PicoPad[0]&0x20) << 2; // pen push -> C |
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38 | d = ~d; |
39 | break; |
40 | |
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41 | case 0x05: d = (PicoPicohw.pen_pos[0] >> 8); break; // what is MS bit for? Games read it.. |
42 | case 0x07: d = PicoPicohw.pen_pos[0] & 0xff; break; |
43 | case 0x09: d = (PicoPicohw.pen_pos[1] >> 8); break; |
44 | case 0x0b: d = PicoPicohw.pen_pos[1] & 0xff; break; |
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45 | case 0x0d: d = (1 << (PicoPicohw.page & 7)) - 1; break; |
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46 | case 0x12: d = PicoPicohw.fifo_bytes == 0 ? 0x80 : 0; break; // guess |
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47 | default: |
48 | elprintf(EL_UIO, "r8 : %06x, %02x @%06x", a&0xffffff, (u8)d, SekPc); |
49 | break; |
50 | } |
51 | } |
52 | |
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53 | //elprintf(EL_UIO, "r8 : %06x, %02x @%06x", a&0xffffff, (u8)d, SekPc); |
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54 | |
55 | end: |
56 | elprintf(EL_IO, "r8 : %06x, %02x @%06x", a&0xffffff, (u8)d, SekPc); |
57 | return d; |
58 | } |
59 | |
60 | static u32 PicoReadPico16(u32 a) |
61 | { |
62 | u32 d=0; |
63 | |
64 | if ((a&0xe00000)==0xe00000) { d=*(u16 *)(Pico.ram+(a&0xfffe)); goto end; } // Ram |
65 | |
66 | a&=0xfffffe; |
67 | |
68 | if (a<Pico.romsize) { d = *(u16 *)(Pico.rom+a); goto end; } // Rom |
69 | |
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70 | if ((a&0xfffff0)==0xc00000) { |
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71 | d = PicoVideoRead(a); |
72 | goto end; |
73 | } |
74 | |
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75 | if (a == 0x800010) |
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76 | d = (PicoPicohw.fifo_bytes > 0x3f) ? 0 : (0x3f - PicoPicohw.fifo_bytes); |
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77 | else if (a == 0x800012) |
78 | d = PicoPicohw.fifo_bytes == 0 ? 0x8000 : 0; // guess |
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79 | else |
80 | elprintf(EL_UIO, "r16: %06x, %04x @%06x", a&0xffffff, d, SekPc); |
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81 | |
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82 | //elprintf(EL_UIO, "r16: %06x, %04x @%06x", a&0xffffff, d, SekPc); |
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83 | |
84 | end: |
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85 | elprintf(EL_IO, "r16: %06x, %04x @%06x", a&0xffffff, d, SekPc); |
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86 | return d; |
87 | } |
88 | |
89 | static u32 PicoReadPico32(u32 a) |
90 | { |
91 | u32 d=0; |
92 | |
93 | if ((a&0xe00000)==0xe00000) { u16 *pm=(u16 *)(Pico.ram+(a&0xfffe)); d = (pm[0]<<16)|pm[1]; goto end; } // Ram |
94 | |
95 | a&=0xfffffe; |
96 | |
97 | if (a<Pico.romsize) { u16 *pm=(u16 *)(Pico.rom+a); d = (pm[0]<<16)|pm[1]; goto end; } // Rom |
98 | |
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99 | if ((a&0xfffff0)==0xc00000) { |
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100 | d = (PicoVideoRead(a)<<16)|PicoVideoRead(a+2); |
101 | goto end; |
102 | } |
103 | |
104 | elprintf(EL_UIO, "r32: %06x, %08x @%06x", a&0xffffff, d, SekPc); |
105 | |
106 | end: |
107 | elprintf(EL_IO, "r32: %06x, %08x @%06x", a&0xffffff, d, SekPc); |
108 | return d; |
109 | } |
110 | |
111 | // ----------------------------------------------------------------- |
112 | // Write Ram |
113 | |
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114 | /* |
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115 | void dump(u16 w) |
116 | { |
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117 | static FILE *f[0x10] = { NULL, }; |
118 | char fname[32]; |
119 | int num = PicoPicohw.r12 & 0xf; |
120 | |
121 | sprintf(fname, "ldump%i.bin", num); |
122 | if (f[num] == NULL) |
123 | f[num] = fopen(fname, "wb"); |
124 | fwrite(&w, 1, 2, f[num]); |
125 | //fclose(f); |
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126 | } |
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127 | */ |
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128 | |
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129 | static void PicoWritePico8(u32 a,u8 d) |
130 | { |
131 | elprintf(EL_IO, "w8 : %06x, %02x @%06x", a&0xffffff, d, SekPc); |
132 | |
133 | if ((a&0xe00000)==0xe00000) { *(u8 *)(Pico.ram+((a^1)&0xffff))=d; return; } // Ram |
134 | |
135 | a&=0xffffff; |
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136 | if ((a&0xfffff9)==0xc00011) { if (PicoOpt&2) SN76496Write(d); return; } // PSG Sound |
137 | |
138 | if ((a&0xfffff0)==0xc00000) { // VDP |
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139 | d&=0xff; |
140 | PicoVideoWrite(a,(u16)(d|(d<<8))); // Byte access gets mirrored |
141 | return; |
142 | } |
143 | |
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144 | switch (a & 0x1f) { |
145 | case 0x19: case 0x1b: case 0x1d: case 0x1f: break; // 'S' 'E' 'G' 'A' |
146 | default: |
147 | elprintf(EL_UIO, "w8 : %06x, %02x @%06x", a&0xffffff, d, SekPc); |
148 | break; |
149 | } |
150 | //elprintf(EL_UIO, "w8 : %06x, %02x @%06x", a&0xffffff, d, SekPc); |
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151 | } |
152 | |
153 | static void PicoWritePico16(u32 a,u16 d) |
154 | { |
155 | elprintf(EL_IO, "w16: %06x, %04x", a&0xffffff, d); |
156 | |
157 | if ((a&0xe00000)==0xe00000) { *(u16 *)(Pico.ram+(a&0xfffe))=d; return; } // Ram |
158 | |
159 | a&=0xfffffe; |
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160 | if ((a&0xfffff0)==0xc00000) { PicoVideoWrite(a,(u16)d); return; } // VDP |
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161 | |
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162 | // if (a == 0x800010) dump(d); |
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163 | if (a == 0x800010) |
164 | { |
165 | PicoPicohw.fifo_bytes += 2; |
166 | |
167 | if (PicoPicohw.xpcm_ptr < PicoPicohw.xpcm_buffer + XPCM_BUFFER_SIZE) { |
168 | *PicoPicohw.xpcm_ptr++ = d >> 8; |
169 | *PicoPicohw.xpcm_ptr++ = d; |
170 | } |
171 | else if (PicoPicohw.xpcm_ptr == PicoPicohw.xpcm_buffer + XPCM_BUFFER_SIZE) { |
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172 | elprintf(EL_ANOMALY|EL_PICOHW, "xpcm_buffer overflow!"); |
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173 | PicoPicohw.xpcm_ptr++; |
174 | } |
175 | } |
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176 | else if (a == 0x800012) { |
177 | int r12_old = PicoPicohw.r12; |
178 | PicoPicohw.r12 = d; |
179 | if (r12_old != d) |
180 | PicoReratePico(); |
181 | } |
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182 | else |
183 | elprintf(EL_UIO, "w16: %06x, %04x", a&0xffffff, d); |
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184 | |
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185 | //elprintf(EL_UIO, "w16: %06x, %04x", a&0xffffff, d); |
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186 | } |
187 | |
188 | static void PicoWritePico32(u32 a,u32 d) |
189 | { |
190 | elprintf(EL_IO, "w32: %06x, %08x", a&0xffffff, d); |
191 | |
192 | if ((a&0xe00000)==0xe00000) |
193 | { |
194 | // Ram: |
195 | u16 *pm=(u16 *)(Pico.ram+(a&0xfffe)); |
196 | pm[0]=(u16)(d>>16); pm[1]=(u16)d; |
197 | return; |
198 | } |
199 | |
200 | a&=0xfffffe; |
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201 | if ((a&0xfffff0)==0xc00000) |
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202 | { |
203 | // VDP: |
204 | PicoVideoWrite(a, (u16)(d>>16)); |
205 | PicoVideoWrite(a+2,(u16)d); |
206 | return; |
207 | } |
208 | |
209 | elprintf(EL_UIO, "w32: %06x, %08x", a&0xffffff, d); |
210 | } |
211 | |
212 | #ifdef EMU_M68K |
213 | extern unsigned int (*pm68k_read_memory_8) (unsigned int address); |
214 | extern unsigned int (*pm68k_read_memory_16)(unsigned int address); |
215 | extern unsigned int (*pm68k_read_memory_32)(unsigned int address); |
216 | extern void (*pm68k_write_memory_8) (unsigned int address, unsigned char value); |
217 | extern void (*pm68k_write_memory_16)(unsigned int address, unsigned short value); |
218 | extern void (*pm68k_write_memory_32)(unsigned int address, unsigned int value); |
219 | extern unsigned int (*pm68k_read_memory_pcr_8) (unsigned int address); |
220 | extern unsigned int (*pm68k_read_memory_pcr_16)(unsigned int address); |
221 | extern unsigned int (*pm68k_read_memory_pcr_32)(unsigned int address); |
222 | |
223 | static unsigned int m68k_read_memory_pcrp_8(unsigned int a) |
224 | { |
225 | if((a&0xe00000)==0xe00000) return *(u8 *)(Pico.ram+((a^1)&0xffff)); // Ram |
226 | return 0; |
227 | } |
228 | |
229 | static unsigned int m68k_read_memory_pcrp_16(unsigned int a) |
230 | { |
231 | if((a&0xe00000)==0xe00000) return *(u16 *)(Pico.ram+(a&0xfffe)); // Ram |
232 | return 0; |
233 | } |
234 | |
235 | static unsigned int m68k_read_memory_pcrp_32(unsigned int a) |
236 | { |
237 | if((a&0xe00000)==0xe00000) { u16 *pm=(u16 *)(Pico.ram+(a&0xfffe)); return (pm[0]<<16)|pm[1]; } // Ram |
238 | return 0; |
239 | } |
240 | #endif // EMU_M68K |
241 | |
242 | |
243 | PICO_INTERNAL void PicoMemSetupPico(void) |
244 | { |
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245 | #ifdef EMU_C68K |
246 | PicoCpuCM68k.checkpc=PicoCheckPc; |
247 | PicoCpuCM68k.fetch8 =PicoCpuCM68k.read8 =PicoReadPico8; |
248 | PicoCpuCM68k.fetch16=PicoCpuCM68k.read16=PicoReadPico16; |
249 | PicoCpuCM68k.fetch32=PicoCpuCM68k.read32=PicoReadPico32; |
250 | PicoCpuCM68k.write8 =PicoWritePico8; |
251 | PicoCpuCM68k.write16=PicoWritePico16; |
252 | PicoCpuCM68k.write32=PicoWritePico32; |
253 | #endif |
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254 | #ifdef EMU_M68K |
255 | pm68k_read_memory_8 = PicoReadPico8; |
256 | pm68k_read_memory_16 = PicoReadPico16; |
257 | pm68k_read_memory_32 = PicoReadPico32; |
258 | pm68k_write_memory_8 = PicoWritePico8; |
259 | pm68k_write_memory_16 = PicoWritePico16; |
260 | pm68k_write_memory_32 = PicoWritePico32; |
261 | pm68k_read_memory_pcr_8 = m68k_read_memory_pcrp_8; |
262 | pm68k_read_memory_pcr_16 = m68k_read_memory_pcrp_16; |
263 | pm68k_read_memory_pcr_32 = m68k_read_memory_pcrp_32; |
264 | #endif |
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265 | #ifdef EMU_F68K |
266 | // use standard setup, only override handlers |
267 | PicoMemSetup(); |
268 | PicoCpuFM68k.read_byte =PicoReadPico8; |
269 | PicoCpuFM68k.read_word =PicoReadPico16; |
270 | PicoCpuFM68k.read_long =PicoReadPico32; |
271 | PicoCpuFM68k.write_byte=PicoWritePico8; |
272 | PicoCpuFM68k.write_word=PicoWritePico16; |
273 | PicoCpuFM68k.write_long=PicoWritePico32; |
274 | #endif |
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275 | } |
276 | |