7c67e867c8
IBM.H is gone, video stuff re-organized. Keyboard stuff reorganized. Machines that have their own video, mouse and/or keyboard now have all this in their machine file. Fixed and other cleanups here and there.
71 lines
1.7 KiB
C
71 lines
1.7 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 <string.h>
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#include <wchar.h>
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#include "cpu/cpu.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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uint8_t batman_brdconfig(uint16_t port, void *p)
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{
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switch (port)
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{
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case 0x73:
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return 0xff;
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case 0x75:
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return 0xdf;
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}
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return 0;
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}
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static uint16_t batman_timer_latch;
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static int64_t batman_timer = 0;
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static void batman_timer_over(void *p)
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{
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batman_timer = 0;
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}
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static void batman_timer_write(uint16_t addr, uint8_t val, void *p)
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{
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if (addr & 1)
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batman_timer_latch = (batman_timer_latch & 0xff) | (val << 8);
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else
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batman_timer_latch = (batman_timer_latch & 0xff00) | val;
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batman_timer = batman_timer_latch * TIMER_USEC;
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}
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static uint8_t batman_timer_read(uint16_t addr, void *p)
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{
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uint16_t batman_timer_latch;
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cycles -= (int)PITCONST;
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timer_clock();
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if (batman_timer < 0)
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return 0;
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batman_timer_latch = batman_timer / TIMER_USEC;
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if (addr & 1)
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return batman_timer_latch >> 8;
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return batman_timer_latch & 0xff;
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}
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void intel_batman_init()
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{
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io_sethandler(0x0073, 0x0001, batman_brdconfig, NULL, NULL, NULL, NULL, NULL, NULL);
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io_sethandler(0x0075, 0x0001, batman_brdconfig, NULL, NULL, NULL, NULL, NULL, NULL);
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io_sethandler(0x0078, 0x0002, batman_timer_read, NULL, NULL, batman_timer_write, NULL, NULL, NULL);
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timer_add(batman_timer_over, &batman_timer, &batman_timer, NULL);
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}
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