mirror of
https://github.com/86Box/86Box.git
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109 lines
2.8 KiB
C
109 lines
2.8 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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* Emulation of various Zenith PC compatible machines.
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* Currently only the Zenith Data Systems Supersport is emulated.
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*
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* Authors: Tux,
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* Miran Grca, <mgrca8@gmail.com>
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* TheCollector1995, <mariogplayer@gmail.com>
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* EngiNerd <webmaster.crrc@yahoo.it>
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*
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* Copyright 2016-2019 Tux.
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* Copyright 2016-2019 Miran Grca.
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* Copyright 2020 EngiNerd.
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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 <string.h>
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#include <stdlib.h>
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#include <wchar.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/dma.h>
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#include <86box/nmi.h>
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#include <86box/pic.h>
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#include <86box/pit.h>
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#include <86box/mem.h>
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#include <86box/rom.h>
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#include <86box/device.h>
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#include <86box/fdd.h>
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#include <86box/fdc.h>
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#include <86box/fdc_ext.h>
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#include <86box/gameport.h>
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#include <86box/keyboard.h>
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#include <86box/lpt.h>
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#include <86box/serial.h>
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#include <86box/machine.h>
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#include <86box/io.h>
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#include <86box/video.h>
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#include <86box/plat_unused.h>
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#include <86box/chipset.h>
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typedef struct {
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mem_mapping_t scratchpad_mapping;
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uint8_t *scratchpad_ram;
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} zenith_t;
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static uint8_t
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zenith_scratchpad_read(uint32_t addr, void *priv)
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{
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const zenith_t *dev = (zenith_t *) priv;
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return dev->scratchpad_ram[addr & 0x3fff];
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}
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static void
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zenith_scratchpad_write(uint32_t addr, uint8_t val, void *priv)
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{
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zenith_t *dev = (zenith_t *) priv;
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dev->scratchpad_ram[addr & 0x3fff] = val;
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}
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static void *
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zenith_scratchpad_init(UNUSED(const device_t *info))
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{
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zenith_t *dev;
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dev = (zenith_t *) calloc(1, sizeof(zenith_t));
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dev->scratchpad_ram = malloc(0x4000);
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mem_mapping_add(&dev->scratchpad_mapping, 0xf0000, 0x4000,
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zenith_scratchpad_read, NULL, NULL,
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zenith_scratchpad_write, NULL, NULL,
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dev->scratchpad_ram, MEM_MAPPING_EXTERNAL, dev);
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return dev;
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}
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static void
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zenith_scratchpad_close(void *priv)
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{
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zenith_t *dev = (zenith_t *) priv;
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free(dev->scratchpad_ram);
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free(dev);
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}
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const device_t zenith_scratchpad_device = {
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.name = "Zenith scratchpad RAM",
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.internal_name = "zenith_scratchpad",
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.flags = 0,
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.local = 0,
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.init = zenith_scratchpad_init,
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.close = zenith_scratchpad_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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