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Add v0.7 source

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TomW 2013-04-21 14:54:35 +01:00
commit 3c253c2cf8
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102
src/wd76c10.c Normal file
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#include "ibm.h"
#include "fdc.h"
#include "io.h"
#include "mem.h"
#include "serial.h"
#include "wd76c10.h"
static uint16_t wd76c10_0092;
static uint16_t wd76c10_2072;
static uint16_t wd76c10_2872;
static uint16_t wd76c10_5872;
uint16_t wd76c10_read(uint16_t port)
{
switch (port)
{
case 0x0092:
return wd76c10_0092;
case 0x2072:
return wd76c10_2072;
case 0x2872:
return wd76c10_2872;
case 0x5872:
return wd76c10_5872;
}
return 0;
}
void wd76c10_write(uint16_t port, uint16_t val)
{
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;
serial1_remove();
serial2_remove();
switch ((val >> 5) & 7)
{
case 1: serial1_init(0x3f8); break;
case 2: serial1_init(0x2f8); break;
case 3: serial1_init(0x3e8); break;
case 4: serial1_init(0x2e8); break;
}
switch ((val >> 1) & 7)
{
case 1: serial2_init(0x3f8); break;
case 2: serial2_init(0x2f8); break;
case 3: serial2_init(0x3e8); break;
case 4: serial2_init(0x2e8); break;
}
break;
case 0x2872:
wd76c10_2872 = val;
fdc_remove();
if (!(val & 1))
fdc_init();
break;
case 0x5872:
wd76c10_5872 = val;
break;
}
}
uint8_t wd76c10_readb(uint16_t port)
{
if (port & 1)
return wd76c10_read(port & ~1) >> 8;
return wd76c10_read(port) & 0xff;
}
void wd76c10_writeb(uint16_t port, uint8_t val)
{
uint16_t temp = wd76c10_read(port);
if (port & 1)
wd76c10_write(port & ~1, (temp & 0x00ff) | (val << 8));
else
wd76c10_write(port , (temp & 0xff00) | val);
}
void wd76c10_init()
{
io_sethandler(0x0092, 0x0002, wd76c10_readb, wd76c10_read, NULL, wd76c10_writeb, wd76c10_write, NULL);
io_sethandler(0x2072, 0x0002, wd76c10_readb, wd76c10_read, NULL, wd76c10_writeb, wd76c10_write, NULL);
io_sethandler(0x2872, 0x0002, wd76c10_readb, wd76c10_read, NULL, wd76c10_writeb, wd76c10_write, NULL);
io_sethandler(0x5872, 0x0002, wd76c10_readb, wd76c10_read, NULL, wd76c10_writeb, wd76c10_write, NULL);
}