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neogeo: fill RAM with initial non-zero value. Fixes Double Dragon CD.

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This commit is contained in:
Sorgelig
2023-07-30 23:41:05 +08:00
parent ebdc9c23f0
commit cc340ca5af
1 changed files with 14 additions and 2 deletions
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16
support/neogeo/neogeo_loader.cpp
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@@ -327,13 +327,13 @@ static uint32_t crom_sz_max = 0;
static uint32_t crom_start = 0;
#define ALIGN_1MB ((1024*1024)-1)
static void notify_core(uint8_t index, uint32_t size)
static void notify_core(uint8_t index, uint32_t size, uint32_t memcp_force = 0)
{
user_io_set_index(10);
user_io_set_download(1);
if (index == 4 || index == 6) size = (size + ALIGN_1MB) & ~ALIGN_1MB;
char memcp = !(index == 9 || (index >= 16 && index < 64));
char memcp = memcp_force || !(index == 9 || (index >= 16 && index < 64));
printf("notify_core(%d,%d): memcp = %d\n", index, size, memcp);
if (index == 15 && size > crom_sz_max) crom_sz_max = size;
@@ -353,6 +353,17 @@ static void notify_core(uint8_t index, uint32_t size)
user_io_set_download(0);
}
static uint32_t fill_ram(uint32_t size, uint8_t pattern)
{
void *base = shmem_map(0x30000000, size);
if (!base) return 0;
memset(base, pattern, size);
shmem_unmap(base, size);
notify_core(18, size, 1);
return 1;
}
static uint32_t crom_sz = 0;
static uint32_t neogeo_tx(const char* path, const char* name, uint8_t neo_file_type, int16_t index, uint32_t offset, uint32_t size, uint32_t expand = 0, int swap = 0)
{
@@ -1144,6 +1155,7 @@ int neogeo_romset_tx(char* name, int cd_en)
neogeo_tx(home, "sp-s2.sp1", NEO_FILE_RAW, 0, 0, 0x20000);
}
} else {
fill_ram(128 * 1024, 0xAA);
sprintf(full_path, "%s/uni-bioscd.rom", home);
if (!(mask & 0x8000) && FileExists(full_path)) {
neogeo_tx(home, "uni-bioscd.rom", NEO_FILE_RAW, 0, 0, 0x80000);