mirror of
https://github.com/86Box/86Box.git
synced 2026-02-22 09:35:32 -07:00
d386240fcb
Partially split off the Logitech Serial Mouse emulation from Microsoft Serial Mouse; Slightly reworked serial port emulation (the two UART's are now device_t's, non-FIFO mode implemented and is now default, FIFO mode reimplemented from scratch so it's now actually correct); Added the emulation of the SiS 85c497 chip to the SiS 85c496/497 chipset; Bugfixes to the emulated Super I/O chips and made them all device_t's now.
129 lines
2.2 KiB
C
129 lines
2.2 KiB
C
/* Copyright holders: Sarah Walker
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see COPYING for more details
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <wchar.h>
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#include "cpu/cpu.h"
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#include "device.h"
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#include "machine/machine.h"
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#include "io.h"
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#include "mem.h"
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#include "pit.h"
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#include "timer.h"
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#include "intel.h"
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typedef struct {
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uint16_t timer_latch;
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int64_t timer;
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} batman_t;
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static uint8_t
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batman_config_read(uint16_t port, void *priv)
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{
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uint8_t ret = 0x00;
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switch (port & 0x000f) {
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case 3:
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ret = 0xff;
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break;
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case 5:
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ret = 0xdf;
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break;
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}
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return ret;
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}
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static void
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batman_timer_over(void *priv)
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{
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batman_t *dev = (batman_t *) priv;
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dev->timer = 0;
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}
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static void
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batman_timer_write(uint16_t addr, uint8_t val, void *priv)
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{
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batman_t *dev = (batman_t *) priv;
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if (addr & 1)
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dev->timer_latch = (dev->timer_latch & 0xff) | (val << 8);
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else
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dev->timer_latch = (dev->timer_latch & 0xff00) | val;
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dev->timer = dev->timer_latch * TIMER_USEC;
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}
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static uint8_t
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batman_timer_read(uint16_t addr, void *priv)
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{
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batman_t *dev = (batman_t *) priv;
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uint16_t batman_timer_latch;
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uint8_t ret;
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cycles -= (int)PITCONST;
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timer_clock();
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if (dev->timer < 0)
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return 0;
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batman_timer_latch = dev->timer / TIMER_USEC;
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if (addr & 1)
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ret = batman_timer_latch >> 8;
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else
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ret = batman_timer_latch & 0xff;
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return ret;
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}
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static void
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intel_batman_close(void *priv)
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{
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batman_t *dev = (batman_t *) priv;
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free(dev);
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}
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static void *
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intel_batman_init(const device_t *info)
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{
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batman_t *dev = (batman_t *) malloc(sizeof(batman_t));
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memset(dev, 0, sizeof(batman_t));
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io_sethandler(0x0073, 0x0001,
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batman_config_read, NULL, NULL, NULL, NULL, NULL, dev);
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io_sethandler(0x0075, 0x0001,
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batman_config_read, NULL, NULL, NULL, NULL, NULL, dev);
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io_sethandler(0x0078, 0x0002,
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batman_timer_read, NULL, NULL, batman_timer_write, NULL, NULL, dev);
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timer_add(batman_timer_over, &dev->timer, &dev->timer, dev);
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return dev;
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}
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const device_t intel_batman_device = {
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"Intel Batman board chip",
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0,
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0,
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intel_batman_init, intel_batman_close, NULL,
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NULL, NULL, NULL,
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NULL
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};
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