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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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src/headland.c Normal file
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#include "ibm.h"
#include "io.h"
#include "mem.h"
#include "cpu.h"
#include "headland.h"
static int headland_index;
static uint8_t headland_regs[256];
void headland_write(uint16_t addr, uint8_t val)
{
if (addr & 1)
{
if (headland_index == 0xc1 && !is486) val = 0;
headland_regs[headland_index] = val;
pclog("Headland write %02X %02X\n",headland_index,val);
if (headland_index == 0x82)
{
shadowbios = val & 0x10;
shadowbios_write = !(val & 0x10);
if (shadowbios)
mem_sethandler(0xf0000, 0x10000, mem_read_ram, mem_read_ramw, mem_read_raml, NULL, NULL, NULL );
else
mem_sethandler(0xf0000, 0x10000, mem_read_bios, mem_read_biosw, mem_read_biosl, mem_write_ram, mem_write_ramw, mem_write_raml);
}
}
else headland_index = val;
}
uint8_t headland_read(uint16_t addr)
{
if (addr & 1)
{
if ((headland_index >= 0xc0 || headland_index == 0x20) && cpu_iscyrix)
return 0xff; /*Don't conflict with Cyrix config registers*/
return headland_regs[headland_index];
}
return headland_index;
}
void headland_init()
{
io_sethandler(0x0022, 0x0002, headland_read, NULL, NULL, headland_write, NULL, NULL);
}