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Add emulation of IBM PS/1 Model 2121.

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As part of this :
- FDC Specify command now completes immediately
- Implemented keyboard system flag status
- Added ability to remap 384kb reserved memory to above extended memory
This commit is contained in:
SarahW 2016-05-02 20:06:49 +01:00
commit 0724cfcae4
20 changed files with 461 additions and 26 deletions
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51
src/mem.c
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@ -38,6 +38,7 @@ static mem_mapping_t base_mapping;
mem_mapping_t ram_low_mapping;
static mem_mapping_t ram_high_mapping;
static mem_mapping_t ram_mid_mapping;
static mem_mapping_t ram_remapped_mapping;
mem_mapping_t bios_mapping[8];
static mem_mapping_t bios_high_mapping[8];
static mem_mapping_t romext_mapping;
@ -522,6 +523,15 @@ int loadbios()
mem_load_atide115_bios();
return 1;
case ROM_IBMPS1_2121:
f = romfopen("roms/ibmps1_2121/fc0000.bin", "rb");
if (!f) break;
fseek(f, 0x20000, SEEK_SET);
fread(rom, 0x20000, 1, f);
fclose(f);
biosmask = 0x1ffff;
return 1;
case ROM_DESKPRO_386:
f=romfopen("roms/deskpro386/109592-005.U11.bin","rb");
ff=romfopen("roms/deskpro386/109591-005.U13.bin","rb");
@ -1791,18 +1801,18 @@ void mem_init()
{
int c;
ram = malloc(mem_size * 1024);
ram = malloc((mem_size + 384) * 1024);
rom = malloc(0x20000);
vram = malloc(0x800000);
readlookup2 = malloc(1024 * 1024 * sizeof(uintptr_t));
writelookup2 = malloc(1024 * 1024 * sizeof(uintptr_t));
cachelookup2 = malloc(1024 * 1024);
biosmask = 0xffff;
pages = malloc(((mem_size * 1024) >> 12) * sizeof(page_t));
pages = malloc((((mem_size + 384) * 1024) >> 12) * sizeof(page_t));
page_lookup = malloc((1 << 20) * sizeof(page_t *));
memset(ram, 0, mem_size * 1024);
memset(pages, 0, ((mem_size * 1024) >> 12) * sizeof(page_t));
memset(ram, 0, (mem_size + 384) * 1024);
memset(pages, 0, (((mem_size + 384) * 1024) >> 12) * sizeof(page_t));
memset(page_lookup, 0, (1 << 20) * sizeof(page_t *));
@ -1850,18 +1860,41 @@ void mem_init()
// pclog("Mem resize %i %i\n",mem_size,c);
}
void mem_remap_top_384k()
{
int c;
for (c = ((mem_size * 1024) >> 12); c < (((mem_size + 384) * 1024) >> 12); c++)
{
pages[c].mem = &ram[c << 12];
pages[c].write_b = mem_write_ramb_page;
pages[c].write_w = mem_write_ramw_page;
pages[c].write_l = mem_write_raml_page;
}
for (c = (mem_size / 256); c < ((mem_size + 384) / 256); c++)
{
isram[c] = 1;
if (c >= 0xa && c <= 0xf)
isram[c] = 0;
}
mem_set_mem_state(mem_size * 1024, 384 * 1024, MEM_READ_INTERNAL | MEM_WRITE_INTERNAL);
mem_mapping_add(&ram_remapped_mapping, mem_size * 1024, 384 * 1024, mem_read_ram, mem_read_ramw, mem_read_raml, mem_write_ram, mem_write_ramw, mem_write_raml, ram + (mem_size * 1024), MEM_MAPPING_INTERNAL, NULL);
}
void mem_resize()
{
int c;
free(ram);
ram = malloc(mem_size * 1024);
memset(ram, 0, mem_size * 1024);
ram = malloc((mem_size + 384) * 1024);
memset(ram, 0, (mem_size + 384) * 1024);
free(pages);
pages = malloc(((mem_size * 1024) >> 12) * sizeof(page_t));
memset(pages, 0, ((mem_size * 1024) >> 12) * sizeof(page_t));
for (c = 0; c < ((mem_size * 1024) >> 12); c++)
pages = malloc((((mem_size + 384) * 1024) >> 12) * sizeof(page_t));
memset(pages, 0, (((mem_size + 384) * 1024) >> 12) * sizeof(page_t));
for (c = 0; c < (((mem_size + 384) * 1024) >> 12); c++)
{
pages[c].mem = &ram[c << 12];
pages[c].write_b = mem_write_ramb_page;