76 lines
1.9 KiB
C
76 lines
1.9 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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* This file is part of the 86Box distribution.
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*
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* Implementation of the NEC Mate NX MA30D/23D Unknown Readout.
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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 2020-2023 Miran Grca.
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*/
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#include <stdarg.h>
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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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#define HAVE_STDARG_H
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#include <86box/86box.h>
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#include "cpu.h"
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#include <86box/timer.h>
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#include <86box/io.h>
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#include <86box/device.h>
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#include <86box/chipset.h>
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#include <86box/plat_unused.h>
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static uint8_t
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nec_mate_unk_read(UNUSED(uint16_t addr), void *priv)
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{
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/* Expected by this NEC machine.
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It writes something on ports 3D6C, 3D6D, and 3D6E, then expects to read
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2Ah from port 3D6D. Then it repeats this with ports 6A, 6B, and 6C.
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*/
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return 0x2a;
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}
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static void
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nec_mate_unk_close(void *priv)
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{
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uint8_t *dev = (uint8_t *) priv;
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free(dev);
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}
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static void *
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nec_mate_unk_init(const device_t *info)
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{
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/* We have to return something non-NULL. */
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uint8_t *dev = (uint8_t *) calloc(1, sizeof(uint8_t));
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io_sethandler(0x006b, 0x0001, nec_mate_unk_read, NULL, NULL, NULL, NULL, NULL, NULL);
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io_sethandler(0x3d6d, 0x0001, nec_mate_unk_read, NULL, NULL, NULL, NULL, NULL, NULL);
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return dev;
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}
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const device_t nec_mate_unk_device = {
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.name = "NEC Mate NX MA30D/23D Unknown Readout",
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.internal_name = "nec_mate_unk",
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.flags = 0,
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.local = 0,
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.init = nec_mate_unk_init,
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.close = nec_mate_unk_close,
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.reset = NULL,
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{ .available = NULL },
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.speed_changed = NULL,
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.force_redraw = NULL,
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.config = NULL
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};
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