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Altered device memory mapping.

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This commit is contained in:
TomW 2013-10-19 17:06:55 +01:00
commit 7735e82085
43 changed files with 662 additions and 381 deletions
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24
src/vid_pc1640.c
View file

@ -13,6 +13,9 @@
typedef struct pc1640_t
{
mem_mapping_t cga_mapping;
mem_mapping_t ega_mapping;
cga_t cga;
ega_t ega;
@ -28,25 +31,27 @@ void pc1640_out(uint16_t addr, uint8_t val, void *p)
{
case 0x3db:
pc1640->cga_enabled = val & 0x40;
mem_removehandler(0xa0000, 0x20000, ega_read, NULL, NULL, ega_write, NULL, NULL, &pc1640->ega);
mem_removehandler(0xb8000, 0x08000, cga_read, NULL, NULL, cga_write, NULL, NULL, &pc1640->cga);
if (pc1640->cga_enabled)
mem_sethandler(0xb8000, 0x08000, cga_read, NULL, NULL, cga_write, NULL, NULL, &pc1640->cga);
{
mem_mapping_enable(&pc1640->cga_mapping);
mem_mapping_disable(&pc1640->ega_mapping);
}
else
{
{
mem_mapping_disable(&pc1640->cga_mapping);
switch (pc1640->ega.gdcreg[6] & 0xc)
{
case 0x0: /*128k at A0000*/
mem_sethandler(0xa0000, 0x20000, ega_read, NULL, NULL, ega_write, NULL, NULL, &pc1640->ega);
mem_mapping_set_addr(&pc1640->ega_mapping, 0xa0000, 0x20000);
break;
case 0x4: /*64k at A0000*/
mem_sethandler(0xa0000, 0x10000, ega_read, NULL, NULL, ega_write, NULL, NULL, &pc1640->ega);
mem_mapping_set_addr(&pc1640->ega_mapping, 0xa0000, 0x10000);
break;
case 0x8: /*32k at B0000*/
mem_sethandler(0xb0000, 0x08000, ega_read, NULL, NULL, ega_write, NULL, NULL, &pc1640->ega);
mem_mapping_set_addr(&pc1640->ega_mapping, 0xb0000, 0x08000);
break;
case 0xC: /*32k at B8000*/
mem_sethandler(0xb8000, 0x08000, ega_read, NULL, NULL, ega_write, NULL, NULL, &pc1640->ega);
mem_mapping_set_addr(&pc1640->ega_mapping, 0xb8000, 0x08000);
break;
}
}
@ -115,7 +120,8 @@ void *pc1640_init()
cga_init(&pc1640->cga);
timer_add(pc1640_poll, &pc1640->vidtime, TIMER_ALWAYS_ENABLED, pc1640);
mem_sethandler(0xb8000, 0x08000, cga_read, NULL, NULL, cga_write, NULL, NULL, cga);
mem_mapping_add(&pc1640->cga_mapping, 0xb8000, 0x08000, cga_read, NULL, NULL, cga_write, NULL, NULL, cga);
mem_mapping_add(&pc1640->ega_mapping, 0, 0, ega_read, NULL, NULL, ega_write, NULL, NULL, ega);
io_sethandler(0x03a0, 0x0040, pc1640_in, NULL, NULL, pc1640_out, NULL, NULL, pc1640);
return cga;
}