a505894a10
- 86Box's own headers go to /86box - munt's public interface goes to /mt32emu - all slirp headers go to /slirp (might want to consider using only its public inteface) - single file headers from other projects go in include root
115 lines
2.0 KiB
C
115 lines
2.0 KiB
C
/*
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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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* Emulation of the IBM Expansion Unit (5161).
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*
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*
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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 <stdint.h>
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#include <stdio.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/86box.h>
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#include <86box/device.h>
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#include <86box/io.h>
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#include <86box/apm.h>
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#include <86box/dma.h>
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#include <86box/mem.h>
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#include <86box/pci.h>
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#include <86box/timer.h>
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#include <86box/pit.h>
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#include <86box/port_92.h>
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#include <86box/machine.h>
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#include <86box/intel_sio.h>
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typedef struct
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{
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uint8_t regs[8];
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} ibm_5161_t;
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static void
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ibm_5161_out(uint16_t port, uint8_t val, void *priv)
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{
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ibm_5161_t *dev = (ibm_5161_t *) priv;
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dev->regs[port & 0x0007] = val;
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}
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static uint8_t
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ibm_5161_in(uint16_t port, void *priv)
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{
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ibm_5161_t *dev = (ibm_5161_t *) priv;
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uint8_t ret = 0xff;
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ret = dev->regs[port & 0x0007];
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switch (port) {
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case 0x211:
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case 0x215:
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ret = (get_last_addr() >> 8) & 0xff;
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break;
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case 0x212:
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case 0x216:
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ret = get_last_addr() & 0xff;
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break;
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case 0x213:
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ret = dev->regs[3] & 0x01;
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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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ibm_5161_close(void *p)
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{
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ibm_5161_t *dev = (ibm_5161_t *) p;
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free(dev);
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}
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static void *
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ibm_5161_init(const device_t *info)
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{
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ibm_5161_t *dev = (ibm_5161_t *) malloc(sizeof(ibm_5161_t));
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memset(dev, 0, sizeof(ibm_5161_t));
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/* Extender Card Registers */
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io_sethandler(0x0210, 0x0004,
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ibm_5161_in, NULL, NULL, ibm_5161_out, NULL, NULL, dev);
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/* Receiver Card Registers */
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io_sethandler(0x0214, 0x0003,
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ibm_5161_in, NULL, NULL, ibm_5161_out, NULL, NULL, dev);
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return dev;
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}
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const device_t ibm_5161_device =
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{
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"IBM Expansion Unit (5161)",
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0,
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0,
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ibm_5161_init,
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ibm_5161_close,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL
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};
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