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Add IBM PS/1 Model 2133 (EMEA 451) emulation. Currently displays a cache error

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on boot, but otherwise seems to work fine.
This commit is contained in:
SarahW 2020-02-09 12:17:06 +00:00
commit 8870334114
14 changed files with 319 additions and 12 deletions
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62
src/ps1.c
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@ -301,3 +301,65 @@ void ps1mb_m2121_init()
mem_remap_top_384k();
}
/*Not sure what this SuperIO chip is, so define it here for now*/
static struct
{
int idx;
uint8_t regs[3];
} ps1_m2133_superio;
static uint16_t ps1_lpt_io[4] = {0x378, 0x3bc, 0x278, 0x378};
static uint16_t ps1_com_io[4] = {0x3f8, 0x2f8, 0x3e8, 0x2e8};
static uint8_t ps1_m2133_read(uint16_t port, void *p)
{
uint8_t ret = 0xff;
switch (port)
{
case 0x398:
ret = ps1_m2133_superio.idx;
break;
case 0x399:
if (ps1_m2133_superio.idx < 3)
ret = ps1_m2133_superio.regs[ps1_m2133_superio.idx];
break;
}
return ret;
}
static void ps1_m2133_write(uint16_t port, uint8_t val, void *p)
{
// pclog("ps1_m2133_write: port=%04x val=%02x\n", port, val);
switch (port)
{
case 0x398:
ps1_m2133_superio.idx = val;
break;
case 0x399:
if (ps1_m2133_superio.idx < 3)
{
ps1_m2133_superio.regs[ps1_m2133_superio.idx] = val;
lpt1_remove();
serial1_remove();
serial2_remove();
if (ps1_m2133_superio.regs[0] & 1)
lpt1_init(ps1_lpt_io[ps1_m2133_superio.regs[1] & 3]);
if (ps1_m2133_superio.regs[0] & 2)
serial1_set(ps1_com_io[(ps1_m2133_superio.regs[1] >> 2) & 3], 4);
if (ps1_m2133_superio.regs[0] & 4)
serial2_set(ps1_com_io[(ps1_m2133_superio.regs[1] >> 4) & 3], 3);
}
break;
}
}
void ps1mb_m2133_init(void)
{
io_sethandler(0x0398, 0x0002, ps1_m2133_read, NULL, NULL, ps1_m2133_write, NULL, NULL, NULL);
}