Implement POST card device

2020-03-23 17:03:28 -03:00
parent 89bc4a58d2
commit 79fb541ce5
10 changed files with 205 additions and 4 deletions
--- a/src/postcard.c
+++ b/src/postcard.c
@@ -0,0 +1,142 @@
+/*
+ * 86Box	A hypervisor and IBM PC system emulator that specializes in
+ *		running old operating systems and software designed for IBM
+ *		PC systems and compatibles from 1981 through fairly recent
+ *		system designs based on the PCI bus.
+ *
+ *		This file is part of the 86Box distribution.
+ *
+ *		Implementation of a port 80h POST diagnostic card.
+ *
+ * Version:	@(#)postcard.c	1.0.0	2020/03/23
+ *
+ * Author:	RichardG, <richardg867@gmail.com>
+ *		Copyright 2020 RichardG.
+ */
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <string.h>
+#include <wchar.h>
+#define HAVE_STDARG_H
+#include "86box.h"
+#include "86box_io.h"
+#include "device.h"
+#include "machine.h"
+#include "plat.h"
+#include "ui.h"
+#include "postcard.h"
+
+
+static uint16_t	postcard_port;
+static uint8_t	postcard_written;
+static uint8_t	postcard_code, postcard_prev_code;
+#define UISTR_LEN	13
+static char	postcard_str[UISTR_LEN];	/* UI output string */
+
+
+extern void	ui_sb_bugui(char *__str);
+
+
+#ifdef ENABLE_POSTCARD_LOG
+int postcard_do_log = ENABLE_POSTCARD_LOG;
+
+
+static void
+postcard_log(const char *fmt, ...)
+{
+    va_list ap;
+
+    if (postcard_do_log) {
+	va_start(ap, fmt);
+	pclog_ex(fmt, ap);
+	va_end(ap);
+    }
+}
+#else
+int postcard_do_log = 0;
+
+#define postcard_log(fmt, ...)
+#endif
+
+
+static void
+postcard_setui(void)
+{
+    if (!postcard_written)
+    	sprintf(postcard_str, "POST: -- --");
+    else if (postcard_written == 1)
+    	sprintf(postcard_str, "POST: %02X --", postcard_code);
+    else
+    	sprintf(postcard_str, "POST: %02X %02X", postcard_code, postcard_prev_code);
+
+    ui_sb_bugui(postcard_str);
+
+    if (postcard_do_log) {
+    	/* log same string sent to the UI */
+    	int len = strlen(postcard_str);
+    	postcard_str[len + 1] = '\0';
+    	postcard_str[len] = '\n';
+    	postcard_log(postcard_str);
+    }
+}
+
+
+static void
+postcard_reset(void)
+{
+    postcard_written = 0;
+    postcard_code = postcard_prev_code = 0x00;
+
+    postcard_setui();
+}
+
+
+static void
+postcard_write(uint16_t port, uint8_t val, void *priv)
+{
+    postcard_prev_code = postcard_code;
+    postcard_code = val;
+    if (postcard_written < 2)
+    	postcard_written++;
+
+    postcard_setui();
+}
+
+
+static void *
+postcard_init(const device_t *info)
+{
+    postcard_reset();
+
+    if (machines[machine].flags & MACHINE_MCA)
+    	postcard_port = 0x680; /* MCA machines */
+    else if (strstr(machines[machine].name, " PS/2 "))
+    	postcard_port = 0x90;  /* ISA PS/2 machines */
+    else
+    	postcard_port = 0x80;  /* AT and clone machines */
+    postcard_log("POST card initializing on port %04Xh\n", postcard_port);
+
+    if (postcard_port) io_sethandler(postcard_port, 1,
+		  NULL, NULL, NULL, postcard_write, NULL, NULL,  NULL);
+
+    return postcard_write;
+}
+
+
+static void
+postcard_close(UNUSED(void *priv))
+{
+    if (postcard_port) io_removehandler(postcard_port, 1,
+		     NULL, NULL, NULL, postcard_write, NULL, NULL,  NULL);
+}
+
+
+const device_t postcard_device = {
+    "POST Card",
+    DEVICE_ISA,
+    0,
+    postcard_init, postcard_close, NULL,
+    NULL, NULL, NULL,
+    NULL
+};