f62fc73862
Selected XT and AT clones can use either their built-in FDC controller or an external one (the IBM AT and Compaq AT machines don't support booting from a 1.44M floppy so this makes the external floppy useful).
Added the FDC to the Adaptec AHA-154xCF ("2" variant) and defaulted to None to keep compatibility with existing FDC's.
136 lines
3.0 KiB
C
136 lines
3.0 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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* 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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*
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*
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* Authors: Sarah Walker, <http://pcem-emulator.co.uk/>
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* Miran Grca, <mgrca8@gmail.com>
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* TheCollector1995, <mariogplayer@gmail.com>
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*
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* Copyright 2008-2019 Sarah Walker.
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* Copyright 2016-2019 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 <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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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 *p)
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{
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zenith_t *dev = (zenith_t *)p;
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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 *p)
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{
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zenith_t *dev = (zenith_t *)p;
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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(const device_t *info)
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{
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zenith_t *dev;
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dev = (zenith_t *)malloc(sizeof(zenith_t));
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memset(dev, 0x00, 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 *p)
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{
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zenith_t *dev = (zenith_t *)p;
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free(dev->scratchpad_ram);
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free(dev);
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}
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static const device_t zenith_scratchpad_device = {
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"Zenith scratchpad RAM",
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0, 0,
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zenith_scratchpad_init, zenith_scratchpad_close, NULL,
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NULL,
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NULL,
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NULL
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};
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int
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machine_xt_zenith_init(const machine_t *model)
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{
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int ret;
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ret = bios_load_linear(L"roms/machines/zdsupers/z184m v3.1d.10d",
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0x000f8000, 32768, 0);
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if (bios_only || !ret)
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return ret;
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machine_common_init(model);
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if (fdc_type == FDC_INTERNAL)
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device_add(&fdc_xt_device);
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lpt1_remove(); /* only one parallel port */
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lpt2_remove();
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lpt1_init(0x278);
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device_add(&i8250_device);
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serial_set_next_inst(2); /* So that serial_standalone_init() won't do anything. */
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device_add(&zenith_scratchpad_device);
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pit_ctr_set_out_func(&pit->counters[1], pit_refresh_timer_xt);
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device_add(&keyboard_xt_compaq_device);
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nmi_init();
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return ret;
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}
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