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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 |
37 | d |= (PicoPad[0]&0x20) << 2; // red button -> C |
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38 | d = ~d; |
39 | break; |
40 | |
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41 | case 0x05: d = (PicoPicohw.pen_pos[0] >> 8) & 3; 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) & 3; break; |
44 | case 0x0b: d = PicoPicohw.pen_pos[1] & 0xff; break; |
45 | case 0x0d: d = (1 << (PicoPicohw.page & 7)) - 1; break; |
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46 | case 0x12: d = 0x80; break; |
47 | default: |
48 | elprintf(EL_UIO, "r8 : %06x, %02x @%06x", a&0xffffff, (u8)d, SekPc); |
49 | break; |
50 | } |
51 | } |
52 | |
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) |
76 | d = (PicoPicohw.fifo_bytes > 0x3f) ? 0 : (0x3f - PicoPicohw.fifo_bytes); |
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77 | |
78 | elprintf(EL_UIO, "r16: %06x, %04x @%06x", a&0xffffff, d, SekPc); |
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79 | |
80 | end: |
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81 | elprintf(EL_IO, "r16: %06x, %04x @%06x", a&0xffffff, d, SekPc); |
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82 | return d; |
83 | } |
84 | |
85 | static u32 PicoReadPico32(u32 a) |
86 | { |
87 | u32 d=0; |
88 | |
89 | if ((a&0xe00000)==0xe00000) { u16 *pm=(u16 *)(Pico.ram+(a&0xfffe)); d = (pm[0]<<16)|pm[1]; goto end; } // Ram |
90 | |
91 | a&=0xfffffe; |
92 | |
93 | if (a<Pico.romsize) { u16 *pm=(u16 *)(Pico.rom+a); d = (pm[0]<<16)|pm[1]; goto end; } // Rom |
94 | |
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95 | if ((a&0xfffff0)==0xc00000) { |
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96 | d = (PicoVideoRead(a)<<16)|PicoVideoRead(a+2); |
97 | goto end; |
98 | } |
99 | |
100 | elprintf(EL_UIO, "r32: %06x, %08x @%06x", a&0xffffff, d, SekPc); |
101 | |
102 | end: |
103 | elprintf(EL_IO, "r32: %06x, %08x @%06x", a&0xffffff, d, SekPc); |
104 | return d; |
105 | } |
106 | |
107 | // ----------------------------------------------------------------- |
108 | // Write Ram |
109 | |
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110 | void dump(u16 w) |
111 | { |
112 | FILE *f = fopen("dump.bin", "a"); |
113 | fwrite(&w, 1, 2, f); |
114 | fclose(f); |
115 | } |
116 | |
117 | |
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118 | static void PicoWritePico8(u32 a,u8 d) |
119 | { |
120 | elprintf(EL_IO, "w8 : %06x, %02x @%06x", a&0xffffff, d, SekPc); |
121 | |
122 | if ((a&0xe00000)==0xe00000) { *(u8 *)(Pico.ram+((a^1)&0xffff))=d; return; } // Ram |
123 | |
124 | a&=0xffffff; |
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125 | if ((a&0xfffff9)==0xc00011) { if (PicoOpt&2) SN76496Write(d); return; } // PSG Sound |
126 | |
127 | if ((a&0xfffff0)==0xc00000) { // VDP |
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128 | d&=0xff; |
129 | PicoVideoWrite(a,(u16)(d|(d<<8))); // Byte access gets mirrored |
130 | return; |
131 | } |
132 | |
133 | elprintf(EL_UIO, "w8 : %06x, %02x @%06x", a&0xffffff, d, SekPc); |
134 | } |
135 | |
136 | static void PicoWritePico16(u32 a,u16 d) |
137 | { |
138 | elprintf(EL_IO, "w16: %06x, %04x", a&0xffffff, d); |
139 | |
140 | if ((a&0xe00000)==0xe00000) { *(u16 *)(Pico.ram+(a&0xfffe))=d; return; } // Ram |
141 | |
142 | a&=0xfffffe; |
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143 | if ((a&0xfffff0)==0xc00000) { PicoVideoWrite(a,(u16)d); return; } // VDP |
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144 | |
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145 | // if (a == 0x800010) dump(d); |
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146 | if (a == 0x800010) |
147 | { |
148 | PicoPicohw.fifo_bytes += 2; |
149 | |
150 | if (PicoPicohw.xpcm_ptr < PicoPicohw.xpcm_buffer + XPCM_BUFFER_SIZE) { |
151 | *PicoPicohw.xpcm_ptr++ = d >> 8; |
152 | *PicoPicohw.xpcm_ptr++ = d; |
153 | } |
154 | else if (PicoPicohw.xpcm_ptr == PicoPicohw.xpcm_buffer + XPCM_BUFFER_SIZE) { |
155 | elprintf(EL_ANOMALY, "xpcm_buffer overflow!"); |
156 | PicoPicohw.xpcm_ptr++; |
157 | } |
158 | } |
159 | else if (a == 0x800012) PicoPicohw.r12 = d; |
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160 | |
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161 | elprintf(EL_UIO, "w16: %06x, %04x", a&0xffffff, d); |
162 | } |
163 | |
164 | static void PicoWritePico32(u32 a,u32 d) |
165 | { |
166 | elprintf(EL_IO, "w32: %06x, %08x", a&0xffffff, d); |
167 | |
168 | if ((a&0xe00000)==0xe00000) |
169 | { |
170 | // Ram: |
171 | u16 *pm=(u16 *)(Pico.ram+(a&0xfffe)); |
172 | pm[0]=(u16)(d>>16); pm[1]=(u16)d; |
173 | return; |
174 | } |
175 | |
176 | a&=0xfffffe; |
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177 | if ((a&0xfffff0)==0xc00000) |
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178 | { |
179 | // VDP: |
180 | PicoVideoWrite(a, (u16)(d>>16)); |
181 | PicoVideoWrite(a+2,(u16)d); |
182 | return; |
183 | } |
184 | |
185 | elprintf(EL_UIO, "w32: %06x, %08x", a&0xffffff, d); |
186 | } |
187 | |
188 | #ifdef EMU_M68K |
189 | extern unsigned int (*pm68k_read_memory_8) (unsigned int address); |
190 | extern unsigned int (*pm68k_read_memory_16)(unsigned int address); |
191 | extern unsigned int (*pm68k_read_memory_32)(unsigned int address); |
192 | extern void (*pm68k_write_memory_8) (unsigned int address, unsigned char value); |
193 | extern void (*pm68k_write_memory_16)(unsigned int address, unsigned short value); |
194 | extern void (*pm68k_write_memory_32)(unsigned int address, unsigned int value); |
195 | extern unsigned int (*pm68k_read_memory_pcr_8) (unsigned int address); |
196 | extern unsigned int (*pm68k_read_memory_pcr_16)(unsigned int address); |
197 | extern unsigned int (*pm68k_read_memory_pcr_32)(unsigned int address); |
198 | |
199 | static unsigned int m68k_read_memory_pcrp_8(unsigned int a) |
200 | { |
201 | if((a&0xe00000)==0xe00000) return *(u8 *)(Pico.ram+((a^1)&0xffff)); // Ram |
202 | return 0; |
203 | } |
204 | |
205 | static unsigned int m68k_read_memory_pcrp_16(unsigned int a) |
206 | { |
207 | if((a&0xe00000)==0xe00000) return *(u16 *)(Pico.ram+(a&0xfffe)); // Ram |
208 | return 0; |
209 | } |
210 | |
211 | static unsigned int m68k_read_memory_pcrp_32(unsigned int a) |
212 | { |
213 | if((a&0xe00000)==0xe00000) { u16 *pm=(u16 *)(Pico.ram+(a&0xfffe)); return (pm[0]<<16)|pm[1]; } // Ram |
214 | return 0; |
215 | } |
216 | #endif // EMU_M68K |
217 | |
218 | |
219 | PICO_INTERNAL void PicoMemSetupPico(void) |
220 | { |
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221 | #ifdef EMU_C68K |
222 | PicoCpuCM68k.checkpc=PicoCheckPc; |
223 | PicoCpuCM68k.fetch8 =PicoCpuCM68k.read8 =PicoReadPico8; |
224 | PicoCpuCM68k.fetch16=PicoCpuCM68k.read16=PicoReadPico16; |
225 | PicoCpuCM68k.fetch32=PicoCpuCM68k.read32=PicoReadPico32; |
226 | PicoCpuCM68k.write8 =PicoWritePico8; |
227 | PicoCpuCM68k.write16=PicoWritePico16; |
228 | PicoCpuCM68k.write32=PicoWritePico32; |
229 | #endif |
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230 | #ifdef EMU_M68K |
231 | pm68k_read_memory_8 = PicoReadPico8; |
232 | pm68k_read_memory_16 = PicoReadPico16; |
233 | pm68k_read_memory_32 = PicoReadPico32; |
234 | pm68k_write_memory_8 = PicoWritePico8; |
235 | pm68k_write_memory_16 = PicoWritePico16; |
236 | pm68k_write_memory_32 = PicoWritePico32; |
237 | pm68k_read_memory_pcr_8 = m68k_read_memory_pcrp_8; |
238 | pm68k_read_memory_pcr_16 = m68k_read_memory_pcrp_16; |
239 | pm68k_read_memory_pcr_32 = m68k_read_memory_pcrp_32; |
240 | #endif |
241 | } |
242 | |