103 lines
1.6 KiB
C
103 lines
1.6 KiB
C
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/*
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* 86Box A hypervisor and IBM PC system emulator that specializes in
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* running old operating systems and software designed for IBM
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* PC systems and compatibles from 1981 through fairly recent
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* system designs based on the PCI bus.
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*
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* This file is part of the 86Box distribution.
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*
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* AV9194 clock generator emulation.
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*
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* Used by the S3 86c801 (V7-Mirage) card.
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*
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* Version: @(#)vid_av9194.c 1.0.1 2019/01/12
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*
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* Authors: Miran Grca, <mgrca8@gmail.com>
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*
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* Copyright 2016-2018 Miran Grca.
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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 "../86box.h"
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#include "../device.h"
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#include "vid_av9194.h"
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float
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av9194_getclock(int clock, void *p)
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{
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float ret = 0.0;
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switch (clock & 0x0f)
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{
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case 0:
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ret = 25175000.0;
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break;
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case 1:
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ret = 28322000.0;
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break;
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case 2:
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ret = 40000000.0;
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break;
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case 4:
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ret = 50000000.0;
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break;
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case 5:
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ret = 77000000.0;
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break;
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case 6:
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ret = 36000000.0;
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break;
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case 7:
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ret = 44900000.0;
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break;
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case 8:
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ret = 130000000.0;
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break;
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case 9:
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ret = 120000000.0;
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break;
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case 0xa:
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ret = 80000000.0;
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break;
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case 0xb:
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ret = 31500000.0;
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break;
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case 0xc:
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ret = 110000000.0;
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break;
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case 0xd:
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ret = 65000000.0;
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break;
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case 0xe:
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ret = 75000000.0;
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break;
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case 0xf:
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ret = 94500000.0;
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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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av9194_init(const device_t *info)
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{
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/* Return something non-NULL. */
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return (void *) &av9194_device;
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}
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const device_t av9194_device =
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{
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"AV9194 Clock Generator",
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0, 0,
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av9194_init, NULL,
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NULL, NULL, NULL, NULL
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};
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