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Merge pull request #786 from tiseno100/master

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Added the "fixed" Rabbit code
This commit is contained in:
OBattler
2020-06-06 07:21:41 +02:00
committed by GitHub
parent 8e09593038 66c4ea194d
commit fbf9d22663
1 changed files with 119 additions and 0 deletions
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src/chipset/rabbit.c Normal file
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#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <wchar.h>
#define HAVE_STDARG_H
#include <86box/86box.h>
#include "cpu.h"
#include <86box/timer.h>
#include <86box/io.h>
#include <86box/device.h>
#include <86box/keyboard.h>
#include <86box/mem.h>
#include <86box/fdd.h>
#include <86box/fdc.h>
#include <86box/chipset.h>
typedef struct
{
uint8_t cur_reg,
regs[16];
} rabbit_t;
/*
static void
rabbit_recalcmapping(rabbit_t *dev)
{
uint32_t base;
uint32_t i, shflags = 0;
shadowbios = 0;
shadowbios_write = 0;
for (i = 0; i < 8; i++) {
base = 0xc0000 + (i << 15);
if (dev->regs[0x00] & 0x08) {
shadowbios |= (base >= 0xe0000) && (dev->regs[0x02] & 0x80);
shadowbios_write |= (base >= 0xe0000) && !(dev->regs[0x02] & 0x40);
shflags = (dev->regs[0x00] & 0x01) ? MEM_READ_INTERNAL : MEM_READ_EXTANY;
shflags |= (dev->regs[0x00] & 0x08) ? MEM_WRITE_EXTANY : MEM_WRITE_INTERNAL;
mem_set_mem_state(base, 0x8000, shflags);
} else
mem_set_mem_state(base, 0x8000, MEM_READ_EXTANY | MEM_WRITE_EXTERNAL);
}
flushmmucache();
}
*/
static void
rabbit_write(uint16_t addr, uint8_t val, void *priv)
{
rabbit_t *dev = (rabbit_t *) priv;
switch (addr) {
case 0x22:
dev->cur_reg = val;
break;
case 0x23:
dev->regs[dev->cur_reg] = val;
/*
if (dev->cur_reg == 0x00) {
rabbit_recalcmapping(dev);
}
*/
break;
}
}
static uint8_t
rabbit_read(uint16_t addr, void *priv)
{
uint8_t ret = 0xff;
rabbit_t *dev = (rabbit_t *) priv;
switch (addr) {
case 0x23:
ret = dev->regs[dev->cur_reg];
break;
}
return ret;
}
static void
rabbit_close(void *priv)
{
rabbit_t *dev = (rabbit_t *) priv;
free(dev);
}
static void *
rabbit_init(const device_t *info)
{
rabbit_t *dev = (rabbit_t *) malloc(sizeof(rabbit_t));
memset(dev, 0, sizeof(rabbit_t));
io_sethandler(0x0022, 0x0001, rabbit_read, NULL, NULL, rabbit_write, NULL, NULL, dev);
io_sethandler(0x0023, 0x0001, rabbit_read, NULL, NULL, rabbit_write, NULL, NULL, dev);
return dev;
}
const device_t rabbit_device = {
"SiS Rabbit",
0,
0,
rabbit_init, rabbit_close, NULL,
NULL, NULL, NULL,
NULL
};