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Diffstat (limited to 'romdb.c')
-rw-r--r--romdb.c84
1 files changed, 48 insertions, 36 deletions
diff --git a/romdb.c b/romdb.c
index a422fe7..b79635e 100644
--- a/romdb.c
+++ b/romdb.c
@@ -273,10 +273,21 @@ m68k_context * write_bank_reg_w(uint32_t address, m68k_context * context, uint16
gen->bank_regs[address] = value;
if (!address) {
if (value & 1) {
- context->mem_pointers[2] = NULL;
+ for (int i = 0; i < 8; i++)
+ {
+ context->mem_pointers[gen->mapper_start_index + i] = NULL;
+ }
} else {
- context->mem_pointers[2] = cart + 0x200000/2;
+ //Used for games that only use the mapper for SRAM
+ context->mem_pointers[gen->mapper_start_index] = cart + 0x200000/2;
+ //For games that need more than 4MB
+ for (int i = 1; i < 8; i++)
+ {
+ context->mem_pointers[gen->mapper_start_index + i] = cart + 0x40000*gen->bank_regs[i];
+ }
}
+ } else {
+ context->mem_pointers[gen->mapper_start_index + address] = cart + 0x40000*value;
}
return context;
}
@@ -284,17 +295,7 @@ m68k_context * write_bank_reg_w(uint32_t address, m68k_context * context, uint16
m68k_context * write_bank_reg_b(uint32_t address, m68k_context * context, uint8_t value)
{
if (address & 1) {
- genesis_context * gen = context->system;
- address &= 0xE;
- address >>= 1;
- gen->bank_regs[address] = value;
- if (!address) {
- if (value & 1) {
- context->mem_pointers[2] = NULL;
- } else {
- context->mem_pointers[2] = cart + 0x200000/2;
- }
- }
+ write_bank_reg_w(address, context, value);
}
return context;
}
@@ -526,7 +527,7 @@ void add_memmap_header(rom_info *info, uint8_t *rom, uint32_t size, memmap_chunk
info->map[1].end = 0x400000;
info->map[1].mask = 0x1FFFFF;
info->map[1].flags = MMAP_READ | MMAP_PTR_IDX | MMAP_FUNC_NULL;
- info->map[1].ptr_index = 2;
+ info->map[1].ptr_index = info->mapper_start_index = 0;
info->map[1].read_16 = (read_16_fun)read_sram_w;//these will only be called when mem_pointers[2] == NULL
info->map[1].read_8 = (read_8_fun)read_sram_b;
info->map[1].write_16 = (write_16_fun)write_sram_area_w;//these will be called all writes to the area
@@ -571,6 +572,7 @@ typedef struct {
uint32_t rom_size;
int index;
int num_els;
+ uint16_t ptr_index;
} map_iter_state;
void eeprom_read_fun(char *key, tern_val val, void *data)
@@ -727,31 +729,41 @@ void map_iter_fun(char *key, tern_val val, void *data)
}
map->mask = calc_mask(state->info->save_size, start, end);
} else if (!strcmp(dtype, "Sega mapper")) {
- map->buffer = state->rom + offset;
- //TODO: Calculate this
- map->ptr_index = 2;
- map->flags = MMAP_READ | MMAP_PTR_IDX | MMAP_FUNC_NULL;
- map->mask = calc_mask(state->rom_size - offset, start, end);
+ state->info->mapper_start_index = state->ptr_index++;
+ state->info->map_chunks+=7;
+ state->info->map = realloc(state->info->map, sizeof(memmap_chunk) * state->info->map_chunks);
+ memset(state->info->map + state->info->map_chunks - 7, 0, sizeof(memmap_chunk) * 7);
+ map = state->info->map + state->index;
char *save_device = tern_find_path(node, "save\0device\0").ptrval;
- if (save_device && !strcmp(save_device, "SRAM")) {
- process_sram_def(key, state);
- map->read_16 = (read_16_fun)read_sram_w;//these will only be called when mem_pointers[2] == NULL
- map->read_8 = (read_8_fun)read_sram_b;
- map->write_16 = (write_16_fun)write_sram_area_w;//these will be called all writes to the area
- map->write_8 = (write_8_fun)write_sram_area_b;
- } else if (save_device && !strcmp(save_device, "EEPROM")) {
+ if (save_device && !strcmp(save_device, "EEPROM")) {
process_eeprom_def(key, state);
add_eeprom_map(node, start & map->mask, end & map->mask, state);
- map->write_16 = write_eeprom_i2c_w;
- map->write_8 = write_eeprom_i2c_b;
- map->read_16 = read_eeprom_i2c_w;
- map->read_8 = read_eeprom_i2c_b;
}
- state->info->map_chunks++;
- state->info->map = realloc(state->info->map, sizeof(memmap_chunk) * state->info->map_chunks);
- state->index++;
- memset(state->info->map + state->info->map_chunks - 1, 0, sizeof(memmap_chunk));
- map = state->info->map + state->index;
+ for (int i = 0; i < 7; i++, state->index++, map++)
+ {
+ map->start = start + i * 0x80000;
+ map->end = start + (i + 1) * 0x80000;
+ map->mask = 0x7FFFF;
+ map->buffer = state->rom + offset + i * 0x80000;
+ map->ptr_index = state->ptr_index++;
+ if (i < 3 || !save_device) {
+ map->flags = MMAP_READ | MMAP_PTR_IDX;
+ } else {
+ map->flags = MMAP_READ | MMAP_PTR_IDX | MMAP_FUNC_NULL;
+ if (!strcmp(save_device, "SRAM")) {
+ process_sram_def(key, state);
+ map->read_16 = (read_16_fun)read_sram_w;//these will only be called when mem_pointers[2] == NULL
+ map->read_8 = (read_8_fun)read_sram_b;
+ map->write_16 = (write_16_fun)write_sram_area_w;//these will be called all writes to the area
+ map->write_8 = (write_8_fun)write_sram_area_b;
+ } else if (!strcmp(save_device, "EEPROM")) {
+ map->write_16 = write_eeprom_i2c_w;
+ map->write_8 = write_eeprom_i2c_b;
+ map->read_16 = read_eeprom_i2c_w;
+ map->read_8 = read_eeprom_i2c_b;
+ }
+ }
+ }
map->start = 0xA13000;
map->end = 0xA13100;
map->mask = 0xFF;
@@ -817,7 +829,7 @@ rom_info configure_rom(tern_node *rom_db, void *vrom, uint32_t rom_size, memmap_
info.eeprom_map = NULL;
info.num_eeprom = 0;
memset(info.map, 0, sizeof(memmap_chunk) * info.map_chunks);
- map_iter_state state = {&info, rom, entry, rom_size, 0, info.map_chunks - base_chunks};
+ map_iter_state state = {&info, rom, entry, rom_size, 0, info.map_chunks - base_chunks, 0};
tern_foreach(map, map_iter_fun, &state);
memcpy(info.map + state.index, base_map, sizeof(memmap_chunk) * base_chunks);
} else {
generated by cgit v1.2.3 (git 2.25.1) at 2025-06-19 14:26:52 +0000