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https://github.com/86Box/86Box.git
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90 lines
2.3 KiB
C
90 lines
2.3 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 Radisys EPC-2012 Configuration registers.
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*
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* Authors: Miran Grca, <mgrca8@gmail.com>
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*
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* Copyright 2025 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/machine.h>
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#include <86box/lpt.h>
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#include <86box/machine.h>
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#include <86box/chipset.h>
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#include <86box/plat_unused.h>
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typedef struct radisys_config_t {
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uint8_t regs[2];
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} radisys_config_t;
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static uint8_t
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radisys_config_read(uint16_t port, void *priv)
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{
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radisys_config_t *dev = (radisys_config_t *) priv;
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uint8_t ret = dev->regs[port & 0x0001];
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return ret;
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}
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static void
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radisys_config_write(uint16_t port, uint8_t val, void *priv)
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{
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radisys_config_t *dev = (radisys_config_t *) priv;
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dev->regs[port & 0x0001] = val;
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if (!(port & 0x0001) && machine_has_jumpered_ecp_dma(machine, MACHINE_DMA_USE_CONFIG))
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lpt1_dma((val & 0x02) ? 3 : 1);
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}
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static void
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radisys_config_close(void *priv)
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{
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radisys_config_t *dev = (radisys_config_t *) priv;
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free(dev);
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}
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static void *
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radisys_config_init(UNUSED(const device_t *info))
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{
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/* We have to return something non-NULL. */
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radisys_config_t *dev = (radisys_config_t *) calloc(1, sizeof(radisys_config_t));
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/* 370h is also supported. */
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io_sethandler(0x0270, 0x0002, radisys_config_read, NULL, NULL, radisys_config_write, NULL, NULL, dev);
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return dev;
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}
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const device_t radisys_config_device = {
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.name = "Radisys EPC-2012 Configuration",
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.internal_name = "radisys_config",
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.flags = 0,
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.local = 0,
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.init = radisys_config_init,
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.close = radisys_config_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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