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comparison blastem.c @ 776:cbf97d335444

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Full support for Sega mapper when it comes to data. Code in remapped sections may not work reliably. SSF2 now works.
author Michael Pavone <pavone@retrodev.com>
date Mon, 20 Jul 2015 21:15:34 -0700
parents 41dc895e85ff
children 79b10b421d3c
comparison
equal deleted inserted replaced
775:22728a57d7f3 776:cbf97d335444
32 #define LINES_NTSC 262 32 #define LINES_NTSC 262
33 #define LINES_PAL 312 33 #define LINES_PAL 312
34 34
35 #define MAX_SOUND_CYCLES 100000 35 #define MAX_SOUND_CYCLES 100000
36 36
37 uint16_t cart[CARTRIDGE_WORDS]; 37 uint16_t *cart;
38 uint16_t ram[RAM_WORDS]; 38 uint16_t ram[RAM_WORDS];
39 uint8_t z80_ram[Z80_RAM_BYTES]; 39 uint8_t z80_ram[Z80_RAM_BYTES];
40 40
41 int headless = 0; 41 int headless = 0;
42 int exit_after = 0; 42 int exit_after = 0;
71 filesize -= SMD_BLOCK_SIZE; 71 filesize -= SMD_BLOCK_SIZE;
72 } 72 }
73 return filesize; 73 return filesize;
74 } 74 }
75 75
76 void byteswap_rom() 76 void byteswap_rom(int filesize)
77 { 77 {
78 for(unsigned short * cur = cart; cur - cart < CARTRIDGE_WORDS; ++cur) 78 for(unsigned short * cur = cart; cur - cart < filesize/2; ++cur)
79 { 79 {
80 *cur = (*cur >> 8) | (*cur << 8); 80 *cur = (*cur >> 8) | (*cur << 8);
81 } 81 }
82 } 82 }
83 83
86 uint8_t header[10]; 86 uint8_t header[10];
87 FILE * f = fopen(filename, "rb"); 87 FILE * f = fopen(filename, "rb");
88 if (!f) { 88 if (!f) {
89 return 0; 89 return 0;
90 } 90 }
91 fread(header, 1, sizeof(header), f); 91 if (sizeof(header) != fread(header, 1, sizeof(header), f)) {
92 fprintf(stderr, "Error reading from %s\n", filename);
93 exit(1);
94 }
92 fseek(f, 0, SEEK_END); 95 fseek(f, 0, SEEK_END);
93 long filesize = ftell(f); 96 long filesize = ftell(f);
94 if (filesize/2 > CARTRIDGE_WORDS) {
95 //carts bigger than 4MB not currently supported
96 filesize = CARTRIDGE_WORDS*2;
97 }
98 fseek(f, 0, SEEK_SET); 97 fseek(f, 0, SEEK_SET);
99 if (header[1] == SMD_MAGIC1 && header[8] == SMD_MAGIC2 && header[9] == SMD_MAGIC3) { 98 if (header[1] == SMD_MAGIC1 && header[8] == SMD_MAGIC2 && header[9] == SMD_MAGIC3) {
100 int i; 99 int i;
101 for (i = 3; i < 8; i++) { 100 for (i = 3; i < 8; i++) {
102 if (header[i] != 0) { 101 if (header[i] != 0) {
109 exit(1); 108 exit(1);
110 } 109 }
111 return load_smd_rom(filesize, f); 110 return load_smd_rom(filesize, f);
112 } 111 }
113 } 112 }
114 fread(cart, 2, filesize/2, f); 113 cart = malloc(filesize);
114 if (filesize != fread(cart, 1, filesize, f)) {
115 fprintf(stderr, "Error reading from %s\n", filename);
116 exit(1);
117 }
115 fclose(f); 118 fclose(f);
116 return filesize; 119 return filesize;
117 } 120 }
118 121
119 uint16_t read_dma_value(uint32_t address) 122 uint16_t read_dma_value(uint32_t address)
837 m68k_context *context = init_68k_context(&opts); 840 m68k_context *context = init_68k_context(&opts);
838 gen->m68k = context; 841 gen->m68k = context;
839 842
840 context->video_context = gen->vdp; 843 context->video_context = gen->vdp;
841 context->system = gen; 844 context->system = gen;
842 //cartridge ROM 845 for (int i = 0; i < rom->map_chunks; i++)
843 context->mem_pointers[0] = cart; 846 {
844 context->target_cycle = context->sync_cycle = gen->frame_end > gen->max_cycles ? gen->frame_end : gen->max_cycles; 847 if (rom->map[i].flags & MMAP_PTR_IDX) {
845 //work RAM 848 context->mem_pointers[rom->map[i].ptr_index] = rom->map[i].buffer;
846 context->mem_pointers[1] = ram; 849 }
847 //save RAM/map 850 }
848 context->mem_pointers[2] = rom->map[1].buffer;
849 context->mem_pointers[3] = (uint16_t *)gen->save_storage;
850 851
851 if (statefile) { 852 if (statefile) {
852 uint32_t pc = load_gst(gen, statefile); 853 uint32_t pc = load_gst(gen, statefile);
853 if (!pc) { 854 if (!pc) {
854 fprintf(stderr, "Failed to load save state %s\n", statefile); 855 fprintf(stderr, "Failed to load save state %s\n", statefile);
1024 fputs("You must specify a ROM filename!\n", stderr); 1025 fputs("You must specify a ROM filename!\n", stderr);
1025 return 1; 1026 return 1;
1026 } 1027 }
1027 tern_node *rom_db = load_rom_db(); 1028 tern_node *rom_db = load_rom_db();
1028 rom_info info = configure_rom(rom_db, cart, rom_size, base_map, sizeof(base_map)/sizeof(base_map[0])); 1029 rom_info info = configure_rom(rom_db, cart, rom_size, base_map, sizeof(base_map)/sizeof(base_map[0]));
1029 byteswap_rom(); 1030 byteswap_rom(rom_size);
1030 set_region(&info, force_version); 1031 set_region(&info, force_version);
1031 update_title(info.name); 1032 update_title(info.name);
1032 int def_width = 0; 1033 int def_width = 0;
1033 char *config_width = tern_find_path(config, "video\0width\0").ptrval; 1034 char *config_width = tern_find_path(config, "video\0width\0").ptrval;
1034 if (config_width) { 1035 if (config_width) {