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 | |
28 | elprintf(EL_UIO, "r8 : %06x, %02x @%06x", a&0xffffff, (u8)d, SekPc); |
29 | |
30 | end: |
31 | elprintf(EL_IO, "r8 : %06x, %02x @%06x", a&0xffffff, (u8)d, SekPc); |
32 | return d; |
33 | } |
34 | |
35 | static u32 PicoReadPico16(u32 a) |
36 | { |
37 | u32 d=0; |
38 | |
39 | if ((a&0xe00000)==0xe00000) { d=*(u16 *)(Pico.ram+(a&0xfffe)); goto end; } // Ram |
40 | |
41 | a&=0xfffffe; |
42 | |
43 | if (a<Pico.romsize) { d = *(u16 *)(Pico.rom+a); goto end; } // Rom |
44 | |
45 | if ((a&0xffffe0)==0xc00000) { |
46 | d = PicoVideoRead(a); |
47 | goto end; |
48 | } |
49 | |
50 | elprintf(EL_UIO, "r16: %06x, %04x @%06x", a&0xffffff, d, SekPc); |
51 | |
52 | end: |
53 | elprintf(EL_IO, "r16: %06x, %04x @%06x", a&0xffffff, d, SekPc); |
54 | return d; |
55 | } |
56 | |
57 | static u32 PicoReadPico32(u32 a) |
58 | { |
59 | u32 d=0; |
60 | |
61 | if ((a&0xe00000)==0xe00000) { u16 *pm=(u16 *)(Pico.ram+(a&0xfffe)); d = (pm[0]<<16)|pm[1]; goto end; } // Ram |
62 | |
63 | a&=0xfffffe; |
64 | |
65 | if (a<Pico.romsize) { u16 *pm=(u16 *)(Pico.rom+a); d = (pm[0]<<16)|pm[1]; goto end; } // Rom |
66 | |
67 | if ((a&0xffffe0)==0xc00000) { |
68 | d = (PicoVideoRead(a)<<16)|PicoVideoRead(a+2); |
69 | goto end; |
70 | } |
71 | |
72 | elprintf(EL_UIO, "r32: %06x, %08x @%06x", a&0xffffff, d, SekPc); |
73 | |
74 | end: |
75 | elprintf(EL_IO, "r32: %06x, %08x @%06x", a&0xffffff, d, SekPc); |
76 | return d; |
77 | } |
78 | |
79 | // ----------------------------------------------------------------- |
80 | // Write Ram |
81 | |
82 | static void PicoWritePico8(u32 a,u8 d) |
83 | { |
84 | elprintf(EL_IO, "w8 : %06x, %02x @%06x", a&0xffffff, d, SekPc); |
85 | |
86 | if ((a&0xe00000)==0xe00000) { *(u8 *)(Pico.ram+((a^1)&0xffff))=d; return; } // Ram |
87 | |
88 | a&=0xffffff; |
89 | if ((a&0xffffe0)==0xc00000) { // VDP |
90 | d&=0xff; |
91 | PicoVideoWrite(a,(u16)(d|(d<<8))); // Byte access gets mirrored |
92 | return; |
93 | } |
94 | |
95 | elprintf(EL_UIO, "w8 : %06x, %02x @%06x", a&0xffffff, d, SekPc); |
96 | } |
97 | |
98 | static void PicoWritePico16(u32 a,u16 d) |
99 | { |
100 | elprintf(EL_IO, "w16: %06x, %04x", a&0xffffff, d); |
101 | |
102 | if ((a&0xe00000)==0xe00000) { *(u16 *)(Pico.ram+(a&0xfffe))=d; return; } // Ram |
103 | |
104 | a&=0xfffffe; |
105 | if ((a&0xffffe0)==0xc00000) { PicoVideoWrite(a,(u16)d); return; } // VDP |
106 | |
107 | elprintf(EL_UIO, "w16: %06x, %04x", a&0xffffff, d); |
108 | } |
109 | |
110 | static void PicoWritePico32(u32 a,u32 d) |
111 | { |
112 | elprintf(EL_IO, "w32: %06x, %08x", a&0xffffff, d); |
113 | |
114 | if ((a&0xe00000)==0xe00000) |
115 | { |
116 | // Ram: |
117 | u16 *pm=(u16 *)(Pico.ram+(a&0xfffe)); |
118 | pm[0]=(u16)(d>>16); pm[1]=(u16)d; |
119 | return; |
120 | } |
121 | |
122 | a&=0xfffffe; |
123 | if ((a&0xffffe0)==0xc00000) |
124 | { |
125 | // VDP: |
126 | PicoVideoWrite(a, (u16)(d>>16)); |
127 | PicoVideoWrite(a+2,(u16)d); |
128 | return; |
129 | } |
130 | |
131 | elprintf(EL_UIO, "w32: %06x, %08x", a&0xffffff, d); |
132 | } |
133 | |
134 | #ifdef EMU_M68K |
135 | extern unsigned int (*pm68k_read_memory_8) (unsigned int address); |
136 | extern unsigned int (*pm68k_read_memory_16)(unsigned int address); |
137 | extern unsigned int (*pm68k_read_memory_32)(unsigned int address); |
138 | extern void (*pm68k_write_memory_8) (unsigned int address, unsigned char value); |
139 | extern void (*pm68k_write_memory_16)(unsigned int address, unsigned short value); |
140 | extern void (*pm68k_write_memory_32)(unsigned int address, unsigned int value); |
141 | extern unsigned int (*pm68k_read_memory_pcr_8) (unsigned int address); |
142 | extern unsigned int (*pm68k_read_memory_pcr_16)(unsigned int address); |
143 | extern unsigned int (*pm68k_read_memory_pcr_32)(unsigned int address); |
144 | |
145 | static unsigned int m68k_read_memory_pcrp_8(unsigned int a) |
146 | { |
147 | if((a&0xe00000)==0xe00000) return *(u8 *)(Pico.ram+((a^1)&0xffff)); // Ram |
148 | return 0; |
149 | } |
150 | |
151 | static unsigned int m68k_read_memory_pcrp_16(unsigned int a) |
152 | { |
153 | if((a&0xe00000)==0xe00000) return *(u16 *)(Pico.ram+(a&0xfffe)); // Ram |
154 | return 0; |
155 | } |
156 | |
157 | static unsigned int m68k_read_memory_pcrp_32(unsigned int a) |
158 | { |
159 | if((a&0xe00000)==0xe00000) { u16 *pm=(u16 *)(Pico.ram+(a&0xfffe)); return (pm[0]<<16)|pm[1]; } // Ram |
160 | return 0; |
161 | } |
162 | #endif // EMU_M68K |
163 | |
164 | |
165 | PICO_INTERNAL void PicoMemSetupPico(void) |
166 | { |
167 | #ifdef EMU_M68K |
168 | pm68k_read_memory_8 = PicoReadPico8; |
169 | pm68k_read_memory_16 = PicoReadPico16; |
170 | pm68k_read_memory_32 = PicoReadPico32; |
171 | pm68k_write_memory_8 = PicoWritePico8; |
172 | pm68k_write_memory_16 = PicoWritePico16; |
173 | pm68k_write_memory_32 = PicoWritePico32; |
174 | pm68k_read_memory_pcr_8 = m68k_read_memory_pcrp_8; |
175 | pm68k_read_memory_pcr_16 = m68k_read_memory_pcrp_16; |
176 | pm68k_read_memory_pcr_32 = m68k_read_memory_pcrp_32; |
177 | #endif |
178 | } |
179 | |