nkeynes@18 | 1 | #include <errno.h>
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nkeynes@2 | 2 | #include "dream.h"
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nkeynes@2 | 3 | #include "mem.h"
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nkeynes@11 | 4 | #include "aica/aica.h"
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nkeynes@2 | 5 | #include "asic.h"
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nkeynes@2 | 6 | #include "ide.h"
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nkeynes@2 | 7 | #include "dreamcast.h"
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nkeynes@16 | 8 | #include "maple.h"
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nkeynes@15 | 9 | #include "modules.h"
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nkeynes@15 | 10 |
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nkeynes@2 | 11 | /* Central switchboard for the system */
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nkeynes@2 | 12 |
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nkeynes@15 | 13 | #define MAX_MODULES 32
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nkeynes@15 | 14 | static int num_modules = 0;
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nkeynes@15 | 15 | static int dreamcast_state = 0;
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nkeynes@17 | 16 | static char *dreamcast_config = "DEFAULT";
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nkeynes@16 | 17 | dreamcast_module_t modules[MAX_MODULES];
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nkeynes@15 | 18 |
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nkeynes@23 | 19 | struct save_state_header {
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nkeynes@23 | 20 | char magic[16];
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nkeynes@23 | 21 | uint32_t version;
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nkeynes@23 | 22 | uint32_t module_count;
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nkeynes@23 | 23 | };
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nkeynes@23 | 24 |
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nkeynes@23 | 25 |
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nkeynes@16 | 26 | /**
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nkeynes@16 | 27 | * This function is responsible for defining how all the pieces of the
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nkeynes@16 | 28 | * dreamcast actually fit together. Among other things, this lets us
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nkeynes@16 | 29 | * (reasonably) easily redefine the structure for eg various versions of the
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nkeynes@16 | 30 | * Naomi.
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nkeynes@16 | 31 | *
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nkeynes@16 | 32 | * Note currently the locations of the various MMIO pages are hard coded in
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nkeynes@16 | 33 | * the MMIO definitions - they should probably be moved here.
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nkeynes@16 | 34 | */
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nkeynes@15 | 35 | void dreamcast_configure( )
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nkeynes@15 | 36 | {
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nkeynes@16 | 37 | /* Register the memory framework */
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nkeynes@15 | 38 | dreamcast_register_module( &mem_module );
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nkeynes@16 | 39 |
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nkeynes@16 | 40 | /* Setup standard memory map */
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nkeynes@16 | 41 | mem_create_ram_region( 0x0C000000, 16 MB, MEM_REGION_MAIN );
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nkeynes@16 | 42 | mem_create_ram_region( 0x00800000, 2 MB, MEM_REGION_AUDIO );
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nkeynes@16 | 43 | mem_create_ram_region( 0x00703000, 8 KB, MEM_REGION_AUDIO_SCRATCH );
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nkeynes@16 | 44 | mem_create_ram_region( 0x05000000, 8 MB, MEM_REGION_VIDEO );
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nkeynes@16 | 45 | mem_load_rom( "dcboot.rom", 0x00000000, 0x00200000, 0x89f2b1a1 );
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nkeynes@16 | 46 | mem_load_rom( "dcflash.rom",0x00200000, 0x00020000, 0x357c3568 );
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nkeynes@16 | 47 |
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nkeynes@16 | 48 | /* Load in the rest of the core modules */
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nkeynes@15 | 49 | dreamcast_register_module( &sh4_module );
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nkeynes@15 | 50 | dreamcast_register_module( &asic_module );
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nkeynes@15 | 51 | dreamcast_register_module( &pvr2_module );
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nkeynes@15 | 52 | dreamcast_register_module( &aica_module );
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nkeynes@15 | 53 | dreamcast_register_module( &maple_module );
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nkeynes@15 | 54 | dreamcast_register_module( &ide_module );
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nkeynes@16 | 55 |
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nkeynes@16 | 56 | /* Attach any default maple devices, ie a pair of controllers */
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nkeynes@16 | 57 | maple_device_t controller1 = controller_new();
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nkeynes@16 | 58 | maple_device_t controller2 = controller_new();
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nkeynes@16 | 59 | maple_attach_device( controller1, 0, 0 );
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nkeynes@16 | 60 | maple_attach_device( controller2, 1, 0 );
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nkeynes@15 | 61 | }
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nkeynes@15 | 62 |
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nkeynes@15 | 63 | void dreamcast_register_module( dreamcast_module_t module )
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nkeynes@15 | 64 | {
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nkeynes@15 | 65 | modules[num_modules++] = module;
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nkeynes@16 | 66 | if( module->init != NULL )
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nkeynes@16 | 67 | module->init();
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nkeynes@15 | 68 | }
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nkeynes@15 | 69 |
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nkeynes@15 | 70 |
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nkeynes@2 | 71 | void dreamcast_init( void )
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nkeynes@2 | 72 | {
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nkeynes@15 | 73 | dreamcast_configure();
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nkeynes@23 | 74 | dreamcast_state = STATE_STOPPED;
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nkeynes@2 | 75 | }
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nkeynes@2 | 76 |
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nkeynes@2 | 77 | void dreamcast_reset( void )
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nkeynes@2 | 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]->reset != NULL )
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nkeynes@15 | 82 | modules[i]->reset();
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nkeynes@15 | 83 | }
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nkeynes@2 | 84 | }
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nkeynes@2 | 85 |
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nkeynes@23 | 86 | void dreamcast_run( void )
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nkeynes@15 | 87 | {
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nkeynes@15 | 88 | int i;
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nkeynes@23 | 89 | if( dreamcast_state != STATE_RUNNING ) {
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nkeynes@23 | 90 | for( i=0; i<num_modules; i++ ) {
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nkeynes@23 | 91 | if( modules[i]->start != NULL )
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nkeynes@23 | 92 | modules[i]->start();
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nkeynes@23 | 93 | }
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nkeynes@15 | 94 | }
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nkeynes@23 | 95 | dreamcast_state = STATE_RUNNING;
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nkeynes@23 | 96 | while( dreamcast_state == STATE_RUNNING ) {
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nkeynes@23 | 97 | for( i=0; i<num_modules; i++ ) {
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nkeynes@23 | 98 | if( modules[i]->run_time_slice != NULL )
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nkeynes@23 | 99 | modules[i]->run_time_slice( TIMESLICE_LENGTH );
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nkeynes@23 | 100 | }
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nkeynes@23 | 101 |
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nkeynes@23 | 102 | }
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nkeynes@23 | 103 |
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nkeynes@15 | 104 | for( i=0; i<num_modules; i++ ) {
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nkeynes@15 | 105 | if( modules[i]->stop != NULL )
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nkeynes@15 | 106 | modules[i]->stop();
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nkeynes@15 | 107 | }
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nkeynes@23 | 108 | dreamcast_state = STATE_STOPPED;
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nkeynes@23 | 109 | update_gui();
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nkeynes@2 | 110 | }
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nkeynes@15 | 111 |
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nkeynes@23 | 112 | void dreamcast_stop( void )
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nkeynes@23 | 113 | {
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nkeynes@23 | 114 | if( dreamcast_state == STATE_RUNNING )
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nkeynes@23 | 115 | dreamcast_state = STATE_STOPPING;
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nkeynes@23 | 116 | }
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nkeynes@17 | 117 |
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nkeynes@18 | 118 | int dreamcast_load_state( const gchar *filename )
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nkeynes@15 | 119 | {
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nkeynes@17 | 120 | int i,j;
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nkeynes@17 | 121 | uint32_t count, len;
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nkeynes@17 | 122 | int have_read[MAX_MODULES];
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nkeynes@17 | 123 | char tmp[64];
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nkeynes@15 | 124 | struct save_state_header header;
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nkeynes@18 | 125 | FILE *f;
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nkeynes@18 | 126 |
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nkeynes@18 | 127 | f = fopen( filename, "r" );
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nkeynes@18 | 128 | if( f == NULL ) return errno;
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nkeynes@15 | 129 |
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nkeynes@15 | 130 | fread( &header, sizeof(header), 1, f );
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nkeynes@15 | 131 | if( strncmp( header.magic, DREAMCAST_SAVE_MAGIC, 16 ) != 0 ) {
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nkeynes@15 | 132 | ERROR( "Not a DreamOn save state file" );
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nkeynes@17 | 133 | return 1;
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nkeynes@15 | 134 | }
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nkeynes@15 | 135 | if( header.version != DREAMCAST_SAVE_VERSION ) {
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nkeynes@15 | 136 | ERROR( "DreamOn save state version not supported" );
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nkeynes@17 | 137 | return 1;
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nkeynes@17 | 138 | }
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nkeynes@18 | 139 | if( header.module_count > MAX_MODULES ) {
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nkeynes@18 | 140 | ERROR( "DreamOn save state is corrupted (bad module count)" );
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nkeynes@17 | 141 | return 1;
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nkeynes@17 | 142 | }
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nkeynes@17 | 143 | for( i=0; i<MAX_MODULES; i++ ) {
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nkeynes@17 | 144 | have_read[i] = 0;
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nkeynes@15 | 145 | }
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nkeynes@15 | 146 |
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nkeynes@18 | 147 | for( i=0; i<header.module_count; i++ ) {
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nkeynes@17 | 148 | fread(tmp, 4, 1, f );
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nkeynes@18 | 149 | if( strncmp(tmp, "BLCK", 4) != 0 ) {
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nkeynes@18 | 150 | ERROR( "DreamOn save state is corrupted (missing block header %d)", i );
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nkeynes@17 | 151 | return 2;
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nkeynes@17 | 152 | }
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nkeynes@17 | 153 | len = fread_string(tmp, sizeof(tmp), f );
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nkeynes@17 | 154 | if( len > 64 || len < 1 ) {
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nkeynes@18 | 155 | ERROR( "DreamOn save state is corrupted (bad string)" );
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nkeynes@17 | 156 | return 2;
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nkeynes@17 | 157 | }
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nkeynes@17 | 158 |
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nkeynes@17 | 159 | /* Find the matching module by name */
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nkeynes@17 | 160 | for( j=0; j<num_modules; j++ ) {
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nkeynes@17 | 161 | if( strcmp(modules[j]->name,tmp) == 0 ) {
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nkeynes@17 | 162 | have_read[j] = 1;
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nkeynes@17 | 163 | if( modules[j]->load == NULL ) {
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nkeynes@18 | 164 | ERROR( "DreamOn save state is corrupted (no loader for %s)", modules[j]->name );
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nkeynes@17 | 165 | return 2;
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nkeynes@17 | 166 | } else if( modules[j]->load(f) != 0 ) {
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nkeynes@18 | 167 | ERROR( "DreamOn save state is corrupted (%s failed)", modules[j]->name );
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nkeynes@17 | 168 | return 2;
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nkeynes@17 | 169 | }
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nkeynes@17 | 170 | break;
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nkeynes@17 | 171 | }
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nkeynes@17 | 172 | }
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nkeynes@17 | 173 | if( j == num_modules ) {
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nkeynes@17 | 174 | ERROR( "DreamOn save state contains unrecognized section" );
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nkeynes@17 | 175 | return 2;
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nkeynes@17 | 176 | }
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nkeynes@17 | 177 | }
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nkeynes@17 | 178 |
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nkeynes@17 | 179 | /* Any modules that we didn't load - reset to the default state.
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nkeynes@17 | 180 | * (ie it's not an error to skip a module if you don't actually
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nkeynes@17 | 181 | * care about its state).
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nkeynes@17 | 182 | */
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nkeynes@17 | 183 | for( j=0; j<num_modules; j++ ) {
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nkeynes@17 | 184 | if( have_read[j] == 0 && modules[j]->reset != NULL ) {
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nkeynes@17 | 185 | modules[j]->reset();
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nkeynes@17 | 186 | }
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nkeynes@15 | 187 | }
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nkeynes@18 | 188 | fclose(f);
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nkeynes@18 | 189 | INFO( "Save state read from %s", filename );
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nkeynes@15 | 190 | }
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nkeynes@15 | 191 |
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nkeynes@18 | 192 | int dreamcast_save_state( const gchar *filename )
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nkeynes@15 | 193 | {
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nkeynes@15 | 194 | int i;
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nkeynes@18 | 195 | FILE *f;
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nkeynes@15 | 196 | struct save_state_header header;
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nkeynes@15 | 197 |
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nkeynes@18 | 198 | f = fopen( filename, "w" );
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nkeynes@18 | 199 | if( f == NULL )
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nkeynes@18 | 200 | return errno;
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nkeynes@15 | 201 | strcpy( header.magic, DREAMCAST_SAVE_MAGIC );
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nkeynes@15 | 202 | header.version = DREAMCAST_SAVE_VERSION;
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nkeynes@18 | 203 | header.module_count = 0;
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nkeynes@18 | 204 |
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nkeynes@18 | 205 | for( i=0; i<num_modules; i++ ) {
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nkeynes@18 | 206 | if( modules[i]->save != NULL )
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nkeynes@18 | 207 | header.module_count++;
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nkeynes@18 | 208 | }
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nkeynes@15 | 209 | fwrite( &header, sizeof(header), 1, f );
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nkeynes@15 | 210 | for( i=0; i<num_modules; i++ ) {
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nkeynes@15 | 211 | if( modules[i]->save != NULL ) {
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nkeynes@17 | 212 | fwrite( "BLCK", 4, 1, f );
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nkeynes@17 | 213 | fwrite_string( modules[i]->name, f );
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nkeynes@15 | 214 | modules[i]->save(f);
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nkeynes@15 | 215 | }
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nkeynes@15 | 216 | }
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nkeynes@18 | 217 | fclose( f );
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nkeynes@18 | 218 | INFO( "Save state written to %s", filename );
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nkeynes@15 | 219 | }
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nkeynes@15 | 220 |
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