9037e45d |
1 | #include "../PicoInt.h" |
2 | |
3 | #ifndef UTYPES_DEFINED |
4 | typedef unsigned char u8; |
5 | typedef unsigned short u16; |
6 | typedef unsigned int u32; |
7 | #define UTYPES_DEFINED |
8 | #endif |
9 | |
10 | // ----------------------------------------------------------------- |
11 | // Read Rom and read Ram |
12 | |
13 | static u32 PicoReadPico8(u32 a) |
14 | { |
15 | u32 d=0; |
16 | |
17 | if ((a&0xe00000)==0xe00000) { d = *(u8 *)(Pico.ram+((a^1)&0xffff)); goto end; } // Ram |
18 | if (a<Pico.romsize) { d = *(u8 *)(Pico.rom+(a^1)); goto end; } // Rom |
19 | |
20 | a&=0xffffff; |
21 | |
22 | if ((a&0xffffe0)==0xc00000) { // VDP |
23 | d=PicoVideoRead(a); |
24 | if ((a&1)==0) d>>=8; |
25 | goto end; |
26 | } |
27 | |
406c96c5 |
28 | if ((a&0xffffe0)==0x800000) // Pico I/O |
29 | { |
30 | switch (a & 0x1f) |
31 | { |
32 | case 0x03: |
33 | d = PicoPad[0]&0x0f; // d-pad |
34 | d |= (PicoPad[0]&0x20) >> 1; // red button -> C |
35 | d |= (PicoPad[0]&0x40) << 1; // pen tap -> A |
36 | d = ~d; |
37 | break; |
38 | |
39 | case 0x05: d = (PicoPicoPenPos[0] >> 8) & 3; break; // what is MS bit for? Games read it.. |
40 | case 0x07: d = PicoPicoPenPos[0] & 0xff; break; |
41 | case 0x09: d = (PicoPicoPenPos[1] >> 8) & 3; break; |
42 | case 0x0b: d = PicoPicoPenPos[1] & 0xff; break; |
43 | case 0x0d: d = (1 << (PicoPicoPage & 7)) - 1;break; |
44 | case 0x12: d = 0x80; break; |
45 | default: |
46 | elprintf(EL_UIO, "r8 : %06x, %02x @%06x", a&0xffffff, (u8)d, SekPc); |
47 | break; |
48 | } |
49 | } |
50 | |
51 | // elprintf(EL_UIO, "r8 : %06x, %02x @%06x", a&0xffffff, (u8)d, SekPc); |
9037e45d |
52 | |
53 | end: |
54 | elprintf(EL_IO, "r8 : %06x, %02x @%06x", a&0xffffff, (u8)d, SekPc); |
55 | return d; |
56 | } |
57 | |
58 | static u32 PicoReadPico16(u32 a) |
59 | { |
60 | u32 d=0; |
61 | |
62 | if ((a&0xe00000)==0xe00000) { d=*(u16 *)(Pico.ram+(a&0xfffe)); goto end; } // Ram |
63 | |
64 | a&=0xfffffe; |
65 | |
66 | if (a<Pico.romsize) { d = *(u16 *)(Pico.rom+a); goto end; } // Rom |
67 | |
68 | if ((a&0xffffe0)==0xc00000) { |
69 | d = PicoVideoRead(a); |
70 | goto end; |
71 | } |
72 | |
406c96c5 |
73 | if (a == 0x800010) d = 0x0f; |
74 | |
75 | elprintf(EL_UIO, "r16: %06x, %04x @%06x", a&0xffffff, d, SekPc); |
9037e45d |
76 | |
77 | end: |
406c96c5 |
78 | elprintf(EL_IO, "r16: %06x, %04x @%06x", a&0xffffff, d, SekPc); |
9037e45d |
79 | return d; |
80 | } |
81 | |
82 | static u32 PicoReadPico32(u32 a) |
83 | { |
84 | u32 d=0; |
85 | |
86 | if ((a&0xe00000)==0xe00000) { u16 *pm=(u16 *)(Pico.ram+(a&0xfffe)); d = (pm[0]<<16)|pm[1]; goto end; } // Ram |
87 | |
88 | a&=0xfffffe; |
89 | |
90 | if (a<Pico.romsize) { u16 *pm=(u16 *)(Pico.rom+a); d = (pm[0]<<16)|pm[1]; goto end; } // Rom |
91 | |
92 | if ((a&0xffffe0)==0xc00000) { |
93 | d = (PicoVideoRead(a)<<16)|PicoVideoRead(a+2); |
94 | goto end; |
95 | } |
96 | |
97 | elprintf(EL_UIO, "r32: %06x, %08x @%06x", a&0xffffff, d, SekPc); |
98 | |
99 | end: |
100 | elprintf(EL_IO, "r32: %06x, %08x @%06x", a&0xffffff, d, SekPc); |
101 | return d; |
102 | } |
103 | |
104 | // ----------------------------------------------------------------- |
105 | // Write Ram |
106 | |
406c96c5 |
107 | void dump(u16 w) |
108 | { |
109 | FILE *f = fopen("dump.bin", "a"); |
110 | fwrite(&w, 1, 2, f); |
111 | fclose(f); |
112 | } |
113 | |
114 | |
9037e45d |
115 | static void PicoWritePico8(u32 a,u8 d) |
116 | { |
117 | elprintf(EL_IO, "w8 : %06x, %02x @%06x", a&0xffffff, d, SekPc); |
118 | |
119 | if ((a&0xe00000)==0xe00000) { *(u8 *)(Pico.ram+((a^1)&0xffff))=d; return; } // Ram |
120 | |
121 | a&=0xffffff; |
122 | if ((a&0xffffe0)==0xc00000) { // VDP |
123 | d&=0xff; |
124 | PicoVideoWrite(a,(u16)(d|(d<<8))); // Byte access gets mirrored |
125 | return; |
126 | } |
127 | |
128 | elprintf(EL_UIO, "w8 : %06x, %02x @%06x", a&0xffffff, d, SekPc); |
129 | } |
130 | |
131 | static void PicoWritePico16(u32 a,u16 d) |
132 | { |
133 | elprintf(EL_IO, "w16: %06x, %04x", a&0xffffff, d); |
134 | |
135 | if ((a&0xe00000)==0xe00000) { *(u16 *)(Pico.ram+(a&0xfffe))=d; return; } // Ram |
136 | |
137 | a&=0xfffffe; |
138 | if ((a&0xffffe0)==0xc00000) { PicoVideoWrite(a,(u16)d); return; } // VDP |
139 | |
406c96c5 |
140 | // if (a == 0x800010) dump(d); |
141 | |
9037e45d |
142 | elprintf(EL_UIO, "w16: %06x, %04x", a&0xffffff, d); |
143 | } |
144 | |
145 | static void PicoWritePico32(u32 a,u32 d) |
146 | { |
147 | elprintf(EL_IO, "w32: %06x, %08x", a&0xffffff, d); |
148 | |
149 | if ((a&0xe00000)==0xe00000) |
150 | { |
151 | // Ram: |
152 | u16 *pm=(u16 *)(Pico.ram+(a&0xfffe)); |
153 | pm[0]=(u16)(d>>16); pm[1]=(u16)d; |
154 | return; |
155 | } |
156 | |
157 | a&=0xfffffe; |
158 | if ((a&0xffffe0)==0xc00000) |
159 | { |
160 | // VDP: |
161 | PicoVideoWrite(a, (u16)(d>>16)); |
162 | PicoVideoWrite(a+2,(u16)d); |
163 | return; |
164 | } |
165 | |
166 | elprintf(EL_UIO, "w32: %06x, %08x", a&0xffffff, d); |
167 | } |
168 | |
169 | #ifdef EMU_M68K |
170 | extern unsigned int (*pm68k_read_memory_8) (unsigned int address); |
171 | extern unsigned int (*pm68k_read_memory_16)(unsigned int address); |
172 | extern unsigned int (*pm68k_read_memory_32)(unsigned int address); |
173 | extern void (*pm68k_write_memory_8) (unsigned int address, unsigned char value); |
174 | extern void (*pm68k_write_memory_16)(unsigned int address, unsigned short value); |
175 | extern void (*pm68k_write_memory_32)(unsigned int address, unsigned int value); |
176 | extern unsigned int (*pm68k_read_memory_pcr_8) (unsigned int address); |
177 | extern unsigned int (*pm68k_read_memory_pcr_16)(unsigned int address); |
178 | extern unsigned int (*pm68k_read_memory_pcr_32)(unsigned int address); |
179 | |
180 | static unsigned int m68k_read_memory_pcrp_8(unsigned int a) |
181 | { |
182 | if((a&0xe00000)==0xe00000) return *(u8 *)(Pico.ram+((a^1)&0xffff)); // Ram |
183 | return 0; |
184 | } |
185 | |
186 | static unsigned int m68k_read_memory_pcrp_16(unsigned int a) |
187 | { |
188 | if((a&0xe00000)==0xe00000) return *(u16 *)(Pico.ram+(a&0xfffe)); // Ram |
189 | return 0; |
190 | } |
191 | |
192 | static unsigned int m68k_read_memory_pcrp_32(unsigned int a) |
193 | { |
194 | if((a&0xe00000)==0xe00000) { u16 *pm=(u16 *)(Pico.ram+(a&0xfffe)); return (pm[0]<<16)|pm[1]; } // Ram |
195 | return 0; |
196 | } |
197 | #endif // EMU_M68K |
198 | |
199 | |
200 | PICO_INTERNAL void PicoMemSetupPico(void) |
201 | { |
406c96c5 |
202 | #ifdef EMU_C68K |
203 | PicoCpuCM68k.checkpc=PicoCheckPc; |
204 | PicoCpuCM68k.fetch8 =PicoCpuCM68k.read8 =PicoReadPico8; |
205 | PicoCpuCM68k.fetch16=PicoCpuCM68k.read16=PicoReadPico16; |
206 | PicoCpuCM68k.fetch32=PicoCpuCM68k.read32=PicoReadPico32; |
207 | PicoCpuCM68k.write8 =PicoWritePico8; |
208 | PicoCpuCM68k.write16=PicoWritePico16; |
209 | PicoCpuCM68k.write32=PicoWritePico32; |
210 | #endif |
9037e45d |
211 | #ifdef EMU_M68K |
212 | pm68k_read_memory_8 = PicoReadPico8; |
213 | pm68k_read_memory_16 = PicoReadPico16; |
214 | pm68k_read_memory_32 = PicoReadPico32; |
215 | pm68k_write_memory_8 = PicoWritePico8; |
216 | pm68k_write_memory_16 = PicoWritePico16; |
217 | pm68k_write_memory_32 = PicoWritePico32; |
218 | pm68k_read_memory_pcr_8 = m68k_read_memory_pcrp_8; |
219 | pm68k_read_memory_pcr_16 = m68k_read_memory_pcrp_16; |
220 | pm68k_read_memory_pcr_32 = m68k_read_memory_pcrp_32; |
221 | #endif |
222 | } |
223 | |