nkeynes@2 | 1 | #include "dream.h"
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nkeynes@2 | 2 | #include "mem.h"
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nkeynes@11 | 3 | #include "aica/aica.h"
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nkeynes@2 | 4 | #include "asic.h"
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nkeynes@2 | 5 | #include "ide.h"
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nkeynes@2 | 6 | #include "dreamcast.h"
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nkeynes@16 | 7 | #include "maple.h"
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nkeynes@15 | 8 | #include "modules.h"
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nkeynes@15 | 9 |
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nkeynes@2 | 10 | /* Central switchboard for the system */
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nkeynes@2 | 11 |
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nkeynes@15 | 12 | #define MAX_MODULES 32
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nkeynes@15 | 13 | static int num_modules = 0;
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nkeynes@15 | 14 | static int dreamcast_state = 0;
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nkeynes@17 | 15 | static char *dreamcast_config = "DEFAULT";
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nkeynes@16 | 16 | dreamcast_module_t modules[MAX_MODULES];
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nkeynes@15 | 17 |
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nkeynes@16 | 18 | /**
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nkeynes@16 | 19 | * This function is responsible for defining how all the pieces of the
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nkeynes@16 | 20 | * dreamcast actually fit together. Among other things, this lets us
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nkeynes@16 | 21 | * (reasonably) easily redefine the structure for eg various versions of the
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nkeynes@16 | 22 | * Naomi.
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nkeynes@16 | 23 | *
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nkeynes@16 | 24 | * Note currently the locations of the various MMIO pages are hard coded in
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nkeynes@16 | 25 | * the MMIO definitions - they should probably be moved here.
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nkeynes@16 | 26 | */
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nkeynes@15 | 27 | void dreamcast_configure( )
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nkeynes@15 | 28 | {
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nkeynes@16 | 29 | /* Register the memory framework */
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nkeynes@15 | 30 | dreamcast_register_module( &mem_module );
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nkeynes@16 | 31 |
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nkeynes@16 | 32 | /* Setup standard memory map */
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nkeynes@16 | 33 | mem_create_ram_region( 0x0C000000, 16 MB, MEM_REGION_MAIN );
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nkeynes@16 | 34 | mem_create_ram_region( 0x00800000, 2 MB, MEM_REGION_AUDIO );
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nkeynes@16 | 35 | mem_create_ram_region( 0x00703000, 8 KB, MEM_REGION_AUDIO_SCRATCH );
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nkeynes@16 | 36 | mem_create_ram_region( 0x05000000, 8 MB, MEM_REGION_VIDEO );
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nkeynes@16 | 37 | mem_load_rom( "dcboot.rom", 0x00000000, 0x00200000, 0x89f2b1a1 );
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nkeynes@16 | 38 | mem_load_rom( "dcflash.rom",0x00200000, 0x00020000, 0x357c3568 );
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nkeynes@16 | 39 |
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nkeynes@16 | 40 | /* Load in the rest of the core modules */
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nkeynes@15 | 41 | dreamcast_register_module( &sh4_module );
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nkeynes@15 | 42 | dreamcast_register_module( &asic_module );
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nkeynes@15 | 43 | dreamcast_register_module( &pvr2_module );
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nkeynes@15 | 44 | dreamcast_register_module( &aica_module );
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nkeynes@15 | 45 | dreamcast_register_module( &maple_module );
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nkeynes@15 | 46 | dreamcast_register_module( &ide_module );
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nkeynes@16 | 47 |
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nkeynes@16 | 48 | /* Attach any default maple devices, ie a pair of controllers */
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nkeynes@16 | 49 | maple_device_t controller1 = controller_new();
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nkeynes@16 | 50 | maple_device_t controller2 = controller_new();
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nkeynes@16 | 51 | maple_attach_device( controller1, 0, 0 );
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nkeynes@16 | 52 | maple_attach_device( controller2, 1, 0 );
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nkeynes@15 | 53 | }
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nkeynes@15 | 54 |
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nkeynes@15 | 55 | void dreamcast_register_module( dreamcast_module_t module )
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nkeynes@15 | 56 | {
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nkeynes@15 | 57 | modules[num_modules++] = module;
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nkeynes@16 | 58 | if( module->init != NULL )
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nkeynes@16 | 59 | module->init();
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nkeynes@15 | 60 | }
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nkeynes@15 | 61 |
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nkeynes@15 | 62 |
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nkeynes@2 | 63 | void dreamcast_init( void )
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nkeynes@2 | 64 | {
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nkeynes@15 | 65 | dreamcast_configure();
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nkeynes@2 | 66 | }
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nkeynes@2 | 67 |
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nkeynes@2 | 68 | void dreamcast_reset( void )
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nkeynes@2 | 69 | {
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nkeynes@15 | 70 | int i;
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nkeynes@15 | 71 | for( i=0; i<num_modules; i++ ) {
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nkeynes@15 | 72 | if( modules[i]->reset != NULL )
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nkeynes@15 | 73 | modules[i]->reset();
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nkeynes@15 | 74 | }
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nkeynes@2 | 75 | }
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nkeynes@2 | 76 |
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nkeynes@15 | 77 | void dreamcast_start( void )
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nkeynes@15 | 78 | {
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nkeynes@15 | 79 | int i;
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nkeynes@15 | 80 | for( i=0; i<num_modules; i++ ) {
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nkeynes@15 | 81 | if( modules[i]->start != NULL )
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nkeynes@15 | 82 | modules[i]->start();
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nkeynes@15 | 83 | }
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nkeynes@15 | 84 | }
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nkeynes@2 | 85 | void dreamcast_stop( void )
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nkeynes@2 | 86 | {
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nkeynes@15 | 87 | int i;
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nkeynes@15 | 88 | for( i=0; i<num_modules; i++ ) {
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nkeynes@15 | 89 | if( modules[i]->stop != NULL )
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nkeynes@15 | 90 | modules[i]->stop();
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nkeynes@15 | 91 | }
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nkeynes@2 | 92 | }
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nkeynes@15 | 93 |
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nkeynes@15 | 94 | struct save_state_header {
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nkeynes@15 | 95 | char magic[16];
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nkeynes@15 | 96 | uint32_t version;
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nkeynes@17 | 97 | uint32_t module_count;
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nkeynes@15 | 98 | };
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nkeynes@15 | 99 |
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nkeynes@17 | 100 |
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nkeynes@17 | 101 | int dreamcast_load_state( FILE *f )
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nkeynes@15 | 102 | {
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nkeynes@17 | 103 | int i,j;
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nkeynes@17 | 104 | uint32_t count, len;
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nkeynes@17 | 105 | int have_read[MAX_MODULES];
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nkeynes@17 | 106 | char tmp[64];
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nkeynes@15 | 107 | struct save_state_header header;
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nkeynes@15 | 108 |
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nkeynes@15 | 109 | fread( &header, sizeof(header), 1, f );
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nkeynes@15 | 110 | if( strncmp( header.magic, DREAMCAST_SAVE_MAGIC, 16 ) != 0 ) {
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nkeynes@15 | 111 | ERROR( "Not a DreamOn save state file" );
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nkeynes@17 | 112 | return 1;
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nkeynes@15 | 113 | }
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nkeynes@15 | 114 | if( header.version != DREAMCAST_SAVE_VERSION ) {
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nkeynes@15 | 115 | ERROR( "DreamOn save state version not supported" );
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nkeynes@17 | 116 | return 1;
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nkeynes@17 | 117 | }
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nkeynes@17 | 118 | fread( &count, sizeof(count), 1, f );
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nkeynes@17 | 119 | if( count > MAX_MODULES ) {
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nkeynes@17 | 120 | ERROR( "DreamOn save state is corrupted" );
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nkeynes@17 | 121 | return 1;
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nkeynes@17 | 122 | }
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nkeynes@17 | 123 | for( i=0; i<MAX_MODULES; i++ ) {
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nkeynes@17 | 124 | have_read[i] = 0;
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nkeynes@15 | 125 | }
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nkeynes@15 | 126 |
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nkeynes@17 | 127 | for( i=0; i<count; i++ ) {
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nkeynes@17 | 128 | fread(tmp, 4, 1, f );
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nkeynes@17 | 129 | if( strcmp(tmp, "BLCK") != 0 ) {
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nkeynes@17 | 130 | ERROR( "DreamOn save state is corrupted" );
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nkeynes@17 | 131 | return 2;
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nkeynes@17 | 132 | }
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nkeynes@17 | 133 | len = fread_string(tmp, sizeof(tmp), f );
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nkeynes@17 | 134 | if( len > 64 || len < 1 ) {
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nkeynes@17 | 135 | ERROR( "DreamOn save state is corrupted" );
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nkeynes@17 | 136 | return 2;
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nkeynes@17 | 137 | }
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nkeynes@17 | 138 |
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nkeynes@17 | 139 | /* Find the matching module by name */
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nkeynes@17 | 140 | for( j=0; j<num_modules; j++ ) {
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nkeynes@17 | 141 | if( strcmp(modules[j]->name,tmp) == 0 ) {
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nkeynes@17 | 142 | have_read[j] = 1;
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nkeynes@17 | 143 | if( modules[j]->load == NULL ) {
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nkeynes@17 | 144 | ERROR( "DreamOn save state is corrupted" );
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nkeynes@17 | 145 | return 2;
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nkeynes@17 | 146 | } else if( modules[j]->load(f) != 0 ) {
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nkeynes@17 | 147 | ERROR( "DreamOn save state is corrupted" );
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nkeynes@17 | 148 | return 2;
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nkeynes@17 | 149 | }
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nkeynes@17 | 150 | break;
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nkeynes@17 | 151 | }
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nkeynes@17 | 152 | }
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nkeynes@17 | 153 | if( j == num_modules ) {
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nkeynes@17 | 154 | ERROR( "DreamOn save state contains unrecognized section" );
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nkeynes@17 | 155 | return 2;
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nkeynes@17 | 156 | }
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nkeynes@17 | 157 | }
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nkeynes@17 | 158 |
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nkeynes@17 | 159 | /* Any modules that we didn't load - reset to the default state.
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nkeynes@17 | 160 | * (ie it's not an error to skip a module if you don't actually
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nkeynes@17 | 161 | * care about its state).
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nkeynes@17 | 162 | */
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nkeynes@17 | 163 | for( j=0; j<num_modules; j++ ) {
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nkeynes@17 | 164 | if( have_read[j] == 0 && modules[j]->reset != NULL ) {
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nkeynes@17 | 165 | modules[j]->reset();
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nkeynes@17 | 166 | }
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nkeynes@15 | 167 | }
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nkeynes@15 | 168 | }
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nkeynes@15 | 169 |
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nkeynes@15 | 170 | void dreamcast_save_state( FILE *f )
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nkeynes@15 | 171 | {
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nkeynes@15 | 172 | int i;
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nkeynes@15 | 173 | struct save_state_header header;
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nkeynes@15 | 174 |
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nkeynes@15 | 175 | strcpy( header.magic, DREAMCAST_SAVE_MAGIC );
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nkeynes@15 | 176 | header.version = DREAMCAST_SAVE_VERSION;
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nkeynes@17 | 177 | header.module_count = num_modules;
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nkeynes@15 | 178 | fwrite( &header, sizeof(header), 1, f );
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nkeynes@17 | 179 | fwrite_string( dreamcast_config, f );
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nkeynes@15 | 180 | for( i=0; i<num_modules; i++ ) {
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nkeynes@15 | 181 | if( modules[i]->save != NULL ) {
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nkeynes@17 | 182 | fwrite( "BLCK", 4, 1, f );
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nkeynes@17 | 183 | fwrite_string( modules[i]->name, f );
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nkeynes@15 | 184 | modules[i]->save(f);
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nkeynes@15 | 185 | }
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nkeynes@15 | 186 | }
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nkeynes@15 | 187 | }
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nkeynes@15 | 188 |
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