153 lines
3.5 KiB
C
153 lines
3.5 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 Phoenix 486 Jumper Readout
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*
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* Copyright 2020 Tiseno100
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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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/*
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Bit 7 = Super I/O chip: 1 = enabled, 0 = disabled;
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Bit 6 = Graphics card: 1 = standalone, 0 = on-board;
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Bit 5 = ???? (if 1, siren and hangs);
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Bit 4 = ????;
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Bit 3 = ????;
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Bit 2 = ????;
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Bit 1 = ????;
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Bit 0 = ????.
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*/
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typedef struct
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{
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uint8_t type, jumper;
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} phoenix_486_jumper_t;
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#ifdef ENABLE_PHOENIX_486_JUMPER_LOG
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int phoenix_486_jumper_do_log = ENABLE_PHOENIX_486_JUMPER_LOG;
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static void
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phoenix_486_jumper_log(const char *fmt, ...)
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{
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va_list ap;
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if (phoenix_486_jumper_do_log) {
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va_start(ap, fmt);
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pclog_ex(fmt, ap);
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va_end(ap);
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}
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}
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#else
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#define phoenix_486_jumper_log(fmt, ...)
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#endif
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static void
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phoenix_486_jumper_write(uint16_t addr, uint8_t val, void *priv)
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{
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phoenix_486_jumper_t *dev = (phoenix_486_jumper_t *) priv;
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phoenix_486_jumper_log("Phoenix 486 Jumper: Write %02x\n", val);
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if (dev->type == 1)
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dev->jumper = val & 0xbf;
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else
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dev->jumper = val;
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}
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static uint8_t
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phoenix_486_jumper_read(uint16_t addr, void *priv)
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{
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phoenix_486_jumper_t *dev = (phoenix_486_jumper_t *) priv;
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phoenix_486_jumper_log("Phoenix 486 Jumper: Read %02x\n", dev->jumper);
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return dev->jumper;
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}
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static void
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phoenix_486_jumper_reset(void *priv)
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{
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phoenix_486_jumper_t *dev = (phoenix_486_jumper_t *) priv;
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if (dev->type == 1)
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dev->jumper = 0x00;
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else {
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dev->jumper = 0x9f;
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if (gfxcard != 0x01)
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dev->jumper |= 0x40;
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}
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}
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static void
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phoenix_486_jumper_close(void *priv)
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{
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phoenix_486_jumper_t *dev = (phoenix_486_jumper_t *) priv;
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free(dev);
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}
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static void *
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phoenix_486_jumper_init(const device_t *info)
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{
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phoenix_486_jumper_t *dev = (phoenix_486_jumper_t *) malloc(sizeof(phoenix_486_jumper_t));
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memset(dev, 0, sizeof(phoenix_486_jumper_t));
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dev->type = info->local;
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phoenix_486_jumper_reset(dev);
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io_sethandler(0x0078, 0x0001, phoenix_486_jumper_read, NULL, NULL, phoenix_486_jumper_write, NULL, NULL, dev);
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return dev;
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}
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const device_t phoenix_486_jumper_device = {
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.name = "Phoenix 486 Jumper Readout",
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.internal_name = "phoenix_486_jumper",
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.flags = 0,
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.local = 0,
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.init = phoenix_486_jumper_init,
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.close = phoenix_486_jumper_close,
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.reset = phoenix_486_jumper_reset,
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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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const device_t phoenix_486_jumper_pci_device = {
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.name = "Phoenix 486 Jumper Readout (PCI machines)",
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.internal_name = "phoenix_486_jumper_pci",
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.flags = 0,
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.local = 1,
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.init = phoenix_486_jumper_init,
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.close = phoenix_486_jumper_close,
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.reset = phoenix_486_jumper_reset,
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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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