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Xi 8088: add the UMB dip switch and allow the programming of the BIOS flash memory
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This commit is contained in:
pcem-maintainer 2021-07-04 18:32:57 -03:00
commit 78d0618363
5 changed files with 118 additions and 20 deletions
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21
src/mem.c
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@ -1468,7 +1468,22 @@ void mem_alloc()
memset(_mem_state, 0, sizeof(_mem_state));
mem_set_mem_state(0x000000, (mem_size > 640) ? 0xa0000 : mem_size * 1024, MEM_READ_INTERNAL | MEM_WRITE_INTERNAL);
mem_set_mem_state(0x0a0000, 0x60000, MEM_READ_EXTERNAL | MEM_WRITE_EXTERNAL);
if (romset == ROM_XI8088)
{
// Xi 8088 UMBs are selected by DIP Switches
mem_set_mem_state(0x0a0000, 0x20000, MEM_READ_EXTERNAL | MEM_WRITE_EXTERNAL);
mem_set_mem_state(0x0c0000, 0x08000, model_get_config_int("umb_c0000h_c7fff") ? (MEM_READ_INTERNAL | MEM_WRITE_INTERNAL) : (MEM_READ_EXTERNAL | MEM_WRITE_EXTERNAL));
mem_set_mem_state(0x0c8000, 0x08000, model_get_config_int("umb_c8000h_cffff") ? (MEM_READ_INTERNAL | MEM_WRITE_INTERNAL) : (MEM_READ_EXTERNAL | MEM_WRITE_EXTERNAL));
mem_set_mem_state(0x0d0000, 0x08000, model_get_config_int("umb_d0000h_d7fff") ? (MEM_READ_INTERNAL | MEM_WRITE_INTERNAL) : (MEM_READ_EXTERNAL | MEM_WRITE_EXTERNAL));
mem_set_mem_state(0x0d8000, 0x08000, model_get_config_int("umb_d8000h_dffff") ? (MEM_READ_INTERNAL | MEM_WRITE_INTERNAL) : (MEM_READ_EXTERNAL | MEM_WRITE_EXTERNAL));
mem_set_mem_state(0x0e0000, 0x08000, model_get_config_int("umb_e0000h_e7fff") ? (MEM_READ_INTERNAL | MEM_WRITE_INTERNAL) : (MEM_READ_EXTERNAL | MEM_WRITE_EXTERNAL));
mem_set_mem_state(0x0e8000, 0x08000, model_get_config_int("umb_e8000h_effff") ? (MEM_READ_INTERNAL | MEM_WRITE_INTERNAL) : (MEM_READ_EXTERNAL | MEM_WRITE_EXTERNAL));
mem_set_mem_state(0x0f0000, 0x10000, MEM_READ_EXTERNAL | MEM_WRITE_EXTERNAL);
}
else
{
mem_set_mem_state(0x0a0000, 0x60000, MEM_READ_EXTERNAL | MEM_WRITE_EXTERNAL);
}
mem_mapping_add(&ram_low_mapping, 0x00000, (mem_size > 640) ? 0xa0000 : mem_size * 1024, mem_read_ram, mem_read_ramw, mem_read_raml, mem_write_ram, mem_write_ramw, mem_write_raml, ram, MEM_MAPPING_INTERNAL, NULL);
if (mem_size > 1024)
@ -1484,8 +1499,8 @@ void mem_alloc()
mem_mapping_add(&ram_high_mapping, 0x100000, ((mem_size - 1024) * 1024), mem_read_ram, mem_read_ramw, mem_read_raml, mem_write_ram, mem_write_ramw, mem_write_raml, ram + 0x100000, MEM_MAPPING_INTERNAL, NULL);
}
}
if (mem_size > 768)
mem_mapping_add(&ram_mid_mapping, 0xa0000, 0x60000, mem_read_ram, mem_read_ramw, mem_read_raml, mem_write_ram, mem_write_ramw, mem_write_raml, ram + 0xa0000, MEM_MAPPING_INTERNAL, NULL);
if (mem_size > 768) // 640k - 768k is graphics RAM
mem_mapping_add(&ram_mid_mapping, 0xa0000, 0x60000, mem_read_ram, mem_read_ramw, mem_read_raml, mem_write_ram, mem_write_ramw, mem_write_raml, ram + 0xa0000, MEM_MAPPING_INTERNAL, NULL);
if (romset == ROM_IBMPS1_2011)
mem_mapping_add(&romext_mapping, 0xc8000, 0x08000, mem_read_romext, mem_read_romextw, mem_read_romextl, NULL, NULL, NULL, romext, 0, NULL);