51a902ae |
1 | // This is part of Pico Library |
2 | |
3 | // (c) Copyright 2006 notaz, All rights reserved. |
4 | // Free for non-commercial use. |
5 | |
6 | // For commercial use, separate licencing terms must be obtained. |
7 | |
8 | |
9 | #include "../PicoInt.h" |
10 | |
11 | // ym2612 |
12 | #include "../sound/ym2612.h" |
13 | |
14 | // sn76496 |
15 | extern int *sn76496_regs; |
16 | |
17 | |
18 | typedef enum { |
19 | CHUNK_M68K = 1, |
20 | CHUNK_RAM, |
21 | CHUNK_VRAM, |
22 | CHUNK_ZRAM, |
23 | CHUNK_CRAM, |
24 | CHUNK_VSRAM, |
25 | CHUNK_MISC, |
26 | CHUNK_VIDEO, |
27 | CHUNK_Z80, |
28 | CHUNK_PSG, |
29 | CHUNK_FM, |
30 | // CD stuff |
31 | } chunk_name_e; |
32 | |
33 | |
34 | static int write_chunk(chunk_name_e name, int len, void *data, void *file) |
35 | { |
36 | size_t bwritten = 0; |
37 | bwritten += areaWrite(&name, 1, 1, file); |
38 | bwritten += areaWrite(&len, 1, 4, file); |
39 | bwritten += areaWrite(data, 1, len, file); |
40 | |
41 | return (bwritten == len + 4 + 1); |
42 | } |
43 | |
44 | |
45 | #define CHECKED_WRITE(name,len,data) \ |
46 | if (!write_chunk(name, len, data, file)) return 1; |
47 | |
48 | #define CHECKED_WRITE_BUFF(name,buff) \ |
49 | if (!write_chunk(name, sizeof(buff), &buff, file)) return 1; |
50 | |
51 | int PicoCdSaveState(void *file) |
52 | { |
53 | unsigned char buff[0x60]; |
54 | void *ym2612_regs = YM2612GetRegs(); |
55 | |
56 | areaWrite("PicoSMCD", 1, 8, file); |
57 | areaWrite(&PicoVer, 1, 4, file); |
58 | |
59 | memset(buff, 0, sizeof(buff)); |
60 | PicoAreaPackCpu(buff, 0); |
61 | CHECKED_WRITE_BUFF(CHUNK_M68K, buff); |
62 | CHECKED_WRITE_BUFF(CHUNK_RAM, Pico.ram); |
63 | CHECKED_WRITE_BUFF(CHUNK_VRAM, Pico.vram); |
64 | CHECKED_WRITE_BUFF(CHUNK_ZRAM, Pico.zram); |
65 | CHECKED_WRITE_BUFF(CHUNK_CRAM, Pico.cram); |
66 | CHECKED_WRITE_BUFF(CHUNK_VSRAM, Pico.vsram); |
67 | CHECKED_WRITE_BUFF(CHUNK_MISC, Pico.m); |
68 | CHECKED_WRITE_BUFF(CHUNK_VIDEO, Pico.video); |
69 | if(PicoOpt&7) { |
70 | memset(buff, 0, sizeof(buff)); |
71 | z80_pack(buff); |
72 | CHECKED_WRITE_BUFF(CHUNK_Z80, buff); |
73 | } |
74 | if(PicoOpt&3) |
75 | CHECKED_WRITE(CHUNK_PSG, 28*4, sn76496_regs); |
76 | if(PicoOpt&1) |
77 | CHECKED_WRITE(CHUNK_FM, 0x200+4, ym2612_regs); |
78 | |
79 | // TODO: cd stuff |
80 | |
81 | return 0; |
82 | } |
83 | |
84 | static int g_read_offs = 0; |
85 | |
86 | #define CHECKED_READ(len,data) \ |
87 | if (areaRead(data, 1, len, file) != len) { \ |
88 | g_read_offs += len; \ |
89 | printf("areaRead: premature EOF\n"); \ |
90 | return 0; \ |
91 | } |
92 | |
93 | #define R_ERROR_RETURN(error) \ |
94 | { \ |
95 | printf("PicoCdLoadState @ %x: " error "\n", g_read_offs); \ |
96 | return 1; \ |
97 | } |
98 | |
99 | #define CHECKED_READ2(len2,data) \ |
100 | if (len2 != len) R_ERROR_RETURN("unexpected len, wanted " #len2); \ |
101 | CHECKED_READ(len2, data) |
102 | |
103 | #define CHECKED_READ_BUFF(buff) CHECKED_READ2(sizeof(buff), &buff); |
104 | |
105 | int PicoCdLoadState(void *file) |
106 | { |
107 | unsigned char buff[0x60]; |
108 | int ver, len; |
109 | void *ym2612_regs = YM2612GetRegs(); |
110 | |
111 | g_read_offs = 0; |
112 | CHECKED_READ(8, buff); |
113 | if (strncmp((char *)buff, "PicoSMCD", 8)) R_ERROR_RETURN("bad header"); |
114 | CHECKED_READ(4, &ver); |
115 | |
116 | while (!areaEof(file)) |
117 | { |
118 | CHECKED_READ(1, buff); |
119 | CHECKED_READ(4, &len); |
120 | if (len < 0 || len > 1024*256) R_ERROR_RETURN("bad length"); |
121 | |
122 | switch (buff[0]) |
123 | { |
124 | case CHUNK_M68K: |
125 | CHECKED_READ_BUFF(buff); |
126 | PicoAreaUnpackCpu(buff, 0); |
127 | break; |
128 | |
129 | case CHUNK_Z80: |
130 | CHECKED_READ_BUFF(buff); |
131 | z80_unpack(buff); |
132 | break; |
133 | |
134 | case CHUNK_RAM: CHECKED_READ_BUFF(Pico.ram); break; |
135 | case CHUNK_VRAM: CHECKED_READ_BUFF(Pico.vram); break; |
136 | case CHUNK_ZRAM: CHECKED_READ_BUFF(Pico.zram); break; |
137 | case CHUNK_CRAM: CHECKED_READ_BUFF(Pico.cram); break; |
138 | case CHUNK_VSRAM: CHECKED_READ_BUFF(Pico.vsram); break; |
139 | case CHUNK_MISC: CHECKED_READ_BUFF(Pico.m); break; |
140 | case CHUNK_VIDEO: CHECKED_READ_BUFF(Pico.video); break; |
141 | case CHUNK_PSG: CHECKED_READ2(28*4, sn76496_regs); break; |
142 | case CHUNK_FM: |
143 | CHECKED_READ2(0x200+4, ym2612_regs); |
144 | YM2612PicoStateLoad(); |
145 | break; |
146 | } |
147 | } |
148 | |
149 | return 0; |
150 | } |
151 | |