151 lines
3.3 KiB
C
151 lines
3.3 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 a port 80h POST diagnostic card.
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*
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*
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*
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* Author: RichardG, <richardg867@gmail.com>
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*
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* Copyright 2020 RichardG.
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*/
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdint.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 <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/plat.h>
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#include <86box/ui.h>
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#include <86box/postcard.h>
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#include "cpu.h"
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static uint16_t postcard_port;
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static uint8_t postcard_written;
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static uint8_t postcard_code, postcard_prev_code;
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#define UISTR_LEN 13
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static char postcard_str[UISTR_LEN]; /* UI output string */
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extern void ui_sb_bugui(char *__str);
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#ifdef ENABLE_POSTCARD_LOG
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int postcard_do_log = ENABLE_POSTCARD_LOG;
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static void
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postcard_log(const char *fmt, ...)
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{
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va_list ap;
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if (postcard_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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int postcard_do_log = 0;
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#define postcard_log(fmt, ...)
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#endif
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static void
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postcard_setui(void)
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{
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if (!postcard_written)
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sprintf(postcard_str, "POST: -- --");
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else if (postcard_written == 1)
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sprintf(postcard_str, "POST: %02X --", postcard_code);
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else
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sprintf(postcard_str, "POST: %02X %02X", postcard_code, postcard_prev_code);
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ui_sb_bugui(postcard_str);
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if (postcard_do_log) {
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/* log same string sent to the UI */
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postcard_log("[%04X:%08X] %s\n", CS, cpu_state.pc, postcard_str);
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}
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}
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static void
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postcard_reset(void)
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{
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postcard_written = 0;
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postcard_code = postcard_prev_code = 0x00;
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postcard_setui();
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}
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static void
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postcard_write(uint16_t port, uint8_t val, void *priv)
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{
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if (postcard_written && (val == postcard_code))
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return;
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postcard_prev_code = postcard_code;
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postcard_code = val;
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if (postcard_written < 2)
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postcard_written++;
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postcard_setui();
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}
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static void *
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postcard_init(const device_t *info)
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{
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postcard_reset();
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if (machine_has_bus(machine, MACHINE_BUS_MCA))
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postcard_port = 0x680; /* MCA machines */
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else if (strstr(machines[machine].name, " PS/2 ") || strstr(machine_getname_ex(machine), " PS/1 "))
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postcard_port = 0x190; /* ISA PS/2 machines */
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else if (strstr(machines[machine].name, " IBM XT "))
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postcard_port = 0x60; /* IBM XT */
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else if (strstr(machines[machine].name, " IBM PCjr"))
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postcard_port = 0x10; /* IBM PCjr */
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else if (strstr(machines[machine].name, " Compaq ") && !machine_has_bus(machine, MACHINE_BUS_PCI))
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postcard_port = 0x84; /* ISA Compaq machines */
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else
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postcard_port = 0x80; /* AT and clone machines */
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postcard_log("POST card initializing on port %04Xh\n", postcard_port);
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if (postcard_port) io_sethandler(postcard_port, 1,
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NULL, NULL, NULL, postcard_write, NULL, NULL, NULL);
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return postcard_write;
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}
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static void
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postcard_close(UNUSED(void *priv))
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{
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if (postcard_port) io_removehandler(postcard_port, 1,
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NULL, NULL, NULL, postcard_write, NULL, NULL, NULL);
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}
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const device_t postcard_device = {
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"POST Card",
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DEVICE_ISA,
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0,
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postcard_init, postcard_close, NULL,
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{ NULL }, NULL, NULL,
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NULL
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};
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