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Changed the way mem_add_bios() determine if the CPU has 16-bit bus or not, fixes #667.

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OBattler
2020-04-19 14:16:21 +02:00
parent d4781bd409
commit 5de8564fdc
1 changed files with 7 additions and 2 deletions
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9
src/mem.c
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@@ -2192,6 +2192,11 @@ mem_set_mem_state_smm(uint32_t base, uint32_t size, int state)
void
mem_add_bios(void)
{
int temp_cpu_type, temp_cpu_16bitbus;
temp_cpu_type = machines[machine].cpu[cpu_manufacturer].cpus[cpu_effective].cpu_type;
temp_cpu_16bitbus = (temp_cpu_type == CPU_286 || temp_cpu_type == CPU_386SX || temp_cpu_type == CPU_486SLC || temp_cpu_type == CPU_IBM386SLC || temp_cpu_type == CPU_IBM486SLC );
if (biosmask > 0x1ffff) {
/* 256k+ BIOS'es only have low mappings at E0000-FFFFF. */
mem_mapping_add(&bios_mapping, 0xe0000, 0x20000,
@@ -2212,12 +2217,12 @@ mem_add_bios(void)
}
if (AT) {
mem_mapping_add(&bios_high_mapping, biosaddr | (cpu_16bitbus ? 0x00f00000 : 0xfff00000), biosmask + 1,
mem_mapping_add(&bios_high_mapping, biosaddr | (temp_cpu_16bitbus ? 0x00f00000 : 0xfff00000), biosmask + 1,
mem_read_bios,mem_read_biosw,mem_read_biosl,
mem_write_null,mem_write_nullw,mem_write_nulll,
rom, MEM_MAPPING_EXTERNAL|MEM_MAPPING_ROM|MEM_MAPPING_ROMCS, 0);
mem_set_mem_state(biosaddr | (cpu_16bitbus ? 0x00f00000 : 0xfff00000), biosmask + 1,
mem_set_mem_state(biosaddr | (temp_cpu_16bitbus ? 0x00f00000 : 0xfff00000), biosmask + 1,
MEM_READ_ROMCS | MEM_WRITE_ROMCS);
}
}