1 #include "../PicoInt.h"
4 typedef unsigned char u8;
5 typedef unsigned short u16;
6 typedef unsigned int u32;
10 // -----------------------------------------------------------------
11 // Read Rom and read Ram
13 static u32 PicoReadPico8(u32 a)
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
22 if ((a&0xffffe0)==0xc00000) { // VDP
28 if ((a&0xffffe0)==0x800000) // Pico I/O
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
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;
46 elprintf(EL_UIO, "r8 : %06x, %02x @%06x", a&0xffffff, (u8)d, SekPc);
51 // elprintf(EL_UIO, "r8 : %06x, %02x @%06x", a&0xffffff, (u8)d, SekPc);
54 elprintf(EL_IO, "r8 : %06x, %02x @%06x", a&0xffffff, (u8)d, SekPc);
58 static u32 PicoReadPico16(u32 a)
62 if ((a&0xe00000)==0xe00000) { d=*(u16 *)(Pico.ram+(a&0xfffe)); goto end; } // Ram
66 if (a<Pico.romsize) { d = *(u16 *)(Pico.rom+a); goto end; } // Rom
68 if ((a&0xffffe0)==0xc00000) {
73 if (a == 0x800010) d = 0x0f;
75 elprintf(EL_UIO, "r16: %06x, %04x @%06x", a&0xffffff, d, SekPc);
78 elprintf(EL_IO, "r16: %06x, %04x @%06x", a&0xffffff, d, SekPc);
82 static u32 PicoReadPico32(u32 a)
86 if ((a&0xe00000)==0xe00000) { u16 *pm=(u16 *)(Pico.ram+(a&0xfffe)); d = (pm[0]<<16)|pm[1]; goto end; } // Ram
90 if (a<Pico.romsize) { u16 *pm=(u16 *)(Pico.rom+a); d = (pm[0]<<16)|pm[1]; goto end; } // Rom
92 if ((a&0xffffe0)==0xc00000) {
93 d = (PicoVideoRead(a)<<16)|PicoVideoRead(a+2);
97 elprintf(EL_UIO, "r32: %06x, %08x @%06x", a&0xffffff, d, SekPc);
100 elprintf(EL_IO, "r32: %06x, %08x @%06x", a&0xffffff, d, SekPc);
104 // -----------------------------------------------------------------
109 FILE *f = fopen("dump.bin", "a");
115 static void PicoWritePico8(u32 a,u8 d)
117 elprintf(EL_IO, "w8 : %06x, %02x @%06x", a&0xffffff, d, SekPc);
119 if ((a&0xe00000)==0xe00000) { *(u8 *)(Pico.ram+((a^1)&0xffff))=d; return; } // Ram
122 if ((a&0xffffe0)==0xc00000) { // VDP
124 PicoVideoWrite(a,(u16)(d|(d<<8))); // Byte access gets mirrored
128 elprintf(EL_UIO, "w8 : %06x, %02x @%06x", a&0xffffff, d, SekPc);
131 static void PicoWritePico16(u32 a,u16 d)
133 elprintf(EL_IO, "w16: %06x, %04x", a&0xffffff, d);
135 if ((a&0xe00000)==0xe00000) { *(u16 *)(Pico.ram+(a&0xfffe))=d; return; } // Ram
138 if ((a&0xffffe0)==0xc00000) { PicoVideoWrite(a,(u16)d); return; } // VDP
140 // if (a == 0x800010) dump(d);
142 elprintf(EL_UIO, "w16: %06x, %04x", a&0xffffff, d);
145 static void PicoWritePico32(u32 a,u32 d)
147 elprintf(EL_IO, "w32: %06x, %08x", a&0xffffff, d);
149 if ((a&0xe00000)==0xe00000)
152 u16 *pm=(u16 *)(Pico.ram+(a&0xfffe));
153 pm[0]=(u16)(d>>16); pm[1]=(u16)d;
158 if ((a&0xffffe0)==0xc00000)
161 PicoVideoWrite(a, (u16)(d>>16));
162 PicoVideoWrite(a+2,(u16)d);
166 elprintf(EL_UIO, "w32: %06x, %08x", a&0xffffff, d);
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);
180 static unsigned int m68k_read_memory_pcrp_8(unsigned int a)
182 if((a&0xe00000)==0xe00000) return *(u8 *)(Pico.ram+((a^1)&0xffff)); // Ram
186 static unsigned int m68k_read_memory_pcrp_16(unsigned int a)
188 if((a&0xe00000)==0xe00000) return *(u16 *)(Pico.ram+(a&0xfffe)); // Ram
192 static unsigned int m68k_read_memory_pcrp_32(unsigned int a)
194 if((a&0xe00000)==0xe00000) { u16 *pm=(u16 *)(Pico.ram+(a&0xfffe)); return (pm[0]<<16)|pm[1]; } // Ram
200 PICO_INTERNAL void PicoMemSetupPico(void)
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;
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;