diff options
Diffstat (limited to 'romdb.c')
| -rw-r--r-- | romdb.c | 135 |
1 files changed, 1 insertions, 134 deletions
@@ -9,6 +9,7 @@ #include "xband.h" #include "realtec.h" #include "nor.h" +#include "sega_mapper.h" #define DOM_TITLE_START 0x120 #define DOM_TITLE_END 0x150 @@ -31,140 +32,6 @@ char const *save_type_name(uint8_t save_type) return "SRAM"; } -uint16_t read_sram_w(uint32_t address, m68k_context * context) -{ - genesis_context * gen = context->system; - address &= gen->save_ram_mask; - switch(gen->save_type) - { - case RAM_FLAG_BOTH: - return gen->save_storage[address] << 8 | gen->save_storage[address+1]; - case RAM_FLAG_EVEN: - return gen->save_storage[address >> 1] << 8 | 0xFF; - case RAM_FLAG_ODD: - return gen->save_storage[address >> 1] | 0xFF00; - } - return 0xFFFF;//We should never get here -} - -uint8_t read_sram_b(uint32_t address, m68k_context * context) -{ - genesis_context * gen = context->system; - address &= gen->save_ram_mask; - switch(gen->save_type) - { - case RAM_FLAG_BOTH: - return gen->save_storage[address]; - case RAM_FLAG_EVEN: - if (address & 1) { - return 0xFF; - } else { - return gen->save_storage[address >> 1]; - } - case RAM_FLAG_ODD: - if (address & 1) { - return gen->save_storage[address >> 1]; - } else { - return 0xFF; - } - } - return 0xFF;//We should never get here -} - -m68k_context * write_sram_area_w(uint32_t address, m68k_context * context, uint16_t value) -{ - genesis_context * gen = context->system; - if ((gen->bank_regs[0] & 0x3) == 1) { - address &= gen->save_ram_mask; - switch(gen->save_type) - { - case RAM_FLAG_BOTH: - gen->save_storage[address] = value >> 8; - gen->save_storage[address+1] = value; - break; - case RAM_FLAG_EVEN: - gen->save_storage[address >> 1] = value >> 8; - break; - case RAM_FLAG_ODD: - gen->save_storage[address >> 1] = value; - break; - } - } - return context; -} - -m68k_context * write_sram_area_b(uint32_t address, m68k_context * context, uint8_t value) -{ - genesis_context * gen = context->system; - if ((gen->bank_regs[0] & 0x3) == 1) { - address &= gen->save_ram_mask; - switch(gen->save_type) - { - case RAM_FLAG_BOTH: - gen->save_storage[address] = value; - break; - case RAM_FLAG_EVEN: - if (!(address & 1)) { - gen->save_storage[address >> 1] = value; - } - break; - case RAM_FLAG_ODD: - if (address & 1) { - gen->save_storage[address >> 1] = value; - } - break; - } - } - return context; -} - -m68k_context * write_bank_reg_w(uint32_t address, m68k_context * context, uint16_t value) -{ - genesis_context * gen = context->system; - address &= 0xE; - address >>= 1; - gen->bank_regs[address] = value; - if (!address) { - if (value & 1) { - //Used for games that only use the mapper for SRAM - if (context->mem_pointers[gen->mapper_start_index]) { - gen->mapper_temp = context->mem_pointers[gen->mapper_start_index]; - } - context->mem_pointers[gen->mapper_start_index] = NULL; - //For games that need more than 4MB - for (int i = 4; i < 8; i++) - { - context->mem_pointers[gen->mapper_start_index + i] = NULL; - } - } else { - //Used for games that only use the mapper for SRAM - if (!context->mem_pointers[gen->mapper_start_index]) { - context->mem_pointers[gen->mapper_start_index] = gen->mapper_temp; - } - //For games that need more than 4MB - for (int i = 4; i < 8; i++) - { - context->mem_pointers[gen->mapper_start_index + i] = gen->cart + 0x40000*gen->bank_regs[i]; - } - } - } else { - void *new_ptr = gen->cart + 0x40000*value; - if (context->mem_pointers[gen->mapper_start_index + address] != new_ptr) { - m68k_invalidate_code_range(gen->m68k, address * 0x80000, (address + 1) * 0x80000); - context->mem_pointers[gen->mapper_start_index + address] = new_ptr; - } - } - return context; -} - -m68k_context * write_bank_reg_b(uint32_t address, m68k_context * context, uint8_t value) -{ - if (address & 1) { - write_bank_reg_w(address, context, value); - } - return context; -} - tern_node *load_rom_db() { tern_node *db = parse_bundled_config("rom.db"); |