139 lines
3.8 KiB
C
139 lines
3.8 KiB
C
/* Copyright holders: Sarah Walker
|
|
see COPYING for more details
|
|
*/
|
|
#include "../ibm.h"
|
|
#include "../io.h"
|
|
#include "../mem.h"
|
|
#include "../serial.h"
|
|
#include "../floppy/floppy.h"
|
|
#include "../floppy/fdc.h"
|
|
#include "machine_at.h"
|
|
#include "machine_at_wd76c10.h"
|
|
|
|
|
|
static uint16_t wd76c10_0092;
|
|
static uint16_t wd76c10_2072;
|
|
static uint16_t wd76c10_2872;
|
|
static uint16_t wd76c10_5872;
|
|
|
|
|
|
static uint16_t
|
|
wd76c10_read(uint16_t port, void *priv)
|
|
{
|
|
switch (port)
|
|
{
|
|
case 0x0092:
|
|
return wd76c10_0092;
|
|
|
|
case 0x2072:
|
|
return wd76c10_2072;
|
|
|
|
case 0x2872:
|
|
return wd76c10_2872;
|
|
|
|
case 0x5872:
|
|
return wd76c10_5872;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
static void
|
|
wd76c10_write(uint16_t port, uint16_t val, void *priv)
|
|
{
|
|
pclog("WD76C10 write %04X %04X\n", port, val);
|
|
switch (port)
|
|
{
|
|
case 0x0092:
|
|
wd76c10_0092 = val;
|
|
|
|
mem_a20_alt = val & 2;
|
|
mem_a20_recalc();
|
|
break;
|
|
|
|
case 0x2072:
|
|
wd76c10_2072 = val;
|
|
|
|
serial_remove(1);
|
|
if (!(val & 0x10))
|
|
{
|
|
switch ((val >> 5) & 7)
|
|
{
|
|
case 1: serial_setup(1, 0x3f8, 4); break;
|
|
case 2: serial_setup(1, 0x2f8, 4); break;
|
|
case 3: serial_setup(1, 0x3e8, 4); break;
|
|
case 4: serial_setup(1, 0x2e8, 4); break;
|
|
default: serial_remove(1); break;
|
|
}
|
|
}
|
|
serial_remove(2);
|
|
if (!(val & 0x01))
|
|
{
|
|
switch ((val >> 1) & 7)
|
|
{
|
|
case 1: serial_setup(2, 0x3f8, 3); break;
|
|
case 2: serial_setup(2, 0x2f8, 3); break;
|
|
case 3: serial_setup(2, 0x3e8, 3); break;
|
|
case 4: serial_setup(2, 0x2e8, 3); break;
|
|
default: serial_remove(1); break;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case 0x2872:
|
|
wd76c10_2872 = val;
|
|
|
|
fdc_remove();
|
|
if (!(val & 1))
|
|
fdc_add();
|
|
break;
|
|
|
|
case 0x5872:
|
|
wd76c10_5872 = val;
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
static uint8_t
|
|
wd76c10_readb(uint16_t port, void *priv)
|
|
{
|
|
if (port & 1)
|
|
return wd76c10_read(port & ~1, priv) >> 8;
|
|
return wd76c10_read(port, priv) & 0xff;
|
|
}
|
|
|
|
|
|
static void
|
|
wd76c10_writeb(uint16_t port, uint8_t val, void *priv)
|
|
{
|
|
uint16_t temp = wd76c10_read(port, priv);
|
|
if (port & 1)
|
|
wd76c10_write(port & ~1, (temp & 0x00ff) | (val << 8), priv);
|
|
else
|
|
wd76c10_write(port , (temp & 0xff00) | val, priv);
|
|
}
|
|
|
|
|
|
static void wd76c10_init(void)
|
|
{
|
|
io_sethandler(0x0092, 2,
|
|
wd76c10_readb, wd76c10_read, NULL,
|
|
wd76c10_writeb, wd76c10_write, NULL, NULL);
|
|
io_sethandler(0x2072, 2,
|
|
wd76c10_readb, wd76c10_read, NULL,
|
|
wd76c10_writeb, wd76c10_write, NULL, NULL);
|
|
io_sethandler(0x2872, 2,
|
|
wd76c10_readb, wd76c10_read, NULL,
|
|
wd76c10_writeb, wd76c10_write, NULL, NULL);
|
|
io_sethandler(0x5872, 2,
|
|
wd76c10_readb, wd76c10_read, NULL,
|
|
wd76c10_writeb, wd76c10_write, NULL, NULL);
|
|
}
|
|
|
|
void machine_at_wd76c10_init(void)
|
|
{
|
|
machine_at_ide_init();
|
|
wd76c10_init();
|
|
}
|