From e0697186a2f9b6139636ff5d5c162879c85caf9c Mon Sep 17 00:00:00 2001
From: Keith Packard <keithp@keithp.com>
Date: Sun, 28 Dec 2008 00:11:13 -0800
Subject: [PATCH 1/1] Use SFR access funcs. Support 'dump' command. Add -m
 (monitor) flag.

Not all SFRs are visible in the unified address space, so the SFR-specific
accessors are required.

The dump command is the same as the various 'd*'
commands, but also supports dumping program memory.

The new -m (monitor) flag watches the command stream between s51 and sdcdb.

Signed-off-by: Keith Packard <keithp@keithp.com>
---
 s51/s51-command.c | 34 +++++++++++++++++++++++++++++-----
 s51/s51-main.c    | 14 +++++++-------
 s51/s51.h         |  1 +
 3 files changed, 37 insertions(+), 12 deletions(-)

diff --git a/s51/s51-command.c b/s51/s51-command.c
index b4f853be..25328f1e 100644
--- a/s51/s51-command.c
+++ b/s51/s51-command.c
@@ -46,6 +46,21 @@ parse_uint16(char *value, uint16_t *uint16)
 	return command_success;
 }
 
+static enum command_result
+parse_uint8(char *value, uint8_t *uint8)
+{
+	int	v;
+	enum command_result result;
+
+	result = parse_int(value, &v);
+	if (result != command_success)
+		return command_error;
+	if (v < 0 || v > 0xff)
+		return command_error;
+	*uint8 = v;
+	return command_success;
+}
+
 enum command_result
 command_quit (int argc, char **argv)
 {
@@ -97,19 +112,19 @@ command_di (int argc, char **argv)
 enum command_result
 command_ds (int argc, char **argv)
 {
-	uint16_t start, end;
-	uint8_t	memory[65536];
+	uint8_t start, end;
+	uint8_t	memory[0x100];
 	uint8_t status;
 	int length;
 	
 	if (argc != 3)
 		return command_error;
-	if (parse_uint16(argv[1], &start) != command_success)
+	if (parse_uint8(argv[1], &start) != command_success)
 		return command_error;
-	if (parse_uint16(argv[2], &end) != command_success)
+	if (parse_uint8(argv[2], &end) != command_success)
 		return command_error;
 	length = (int) end - (int) start + 1;
-	status = ccdbg_read_memory(s51_dbg, start + 0xdf00, memory, length);
+	status = ccdbg_read_sfr(s51_dbg, start, memory, length);
 	dump_bytes(memory, length, start);
 	return command_success;
 }
@@ -143,6 +158,15 @@ command_set (int argc, char **argv)
 enum command_result
 command_dump (int argc, char **argv)
 {
+	if (argv[1]) {
+		if (strcmp(argv[1], "rom") == 0 ||
+		    strcmp(argv[1], "xram") == 0)
+			return command_dx(argc-1, argv+1);
+		if (strcmp(argv[1], "iram") == 0)
+			return command_di(argc-1, argv+1);
+		if (strcmp(argv[1], "sfr") == 0)
+			return command_ds(argc-1, argv+1);
+	}
 	return command_error;
 }
 
diff --git a/s51/s51-main.c b/s51/s51-main.c
index 27ed571a..eef55157 100644
--- a/s51/s51-main.c
+++ b/s51/s51-main.c
@@ -31,6 +31,7 @@ static double freq = 11059200;
 char *s51_prompt = "> ";
 struct ccdbg *s51_dbg;
 int s51_interrupted = 0;
+int s51_monitor = 0;
 
 static FILE *s51_input;
 static FILE *s51_output;
@@ -54,7 +55,7 @@ main(int argc, char **argv)
 	char *endptr;
 	struct sigvec vec, ovec;
 
-	while ((opt = getopt(argc, argv, "PVvHht:X:c:r:Z:s:S:p:")) != -1) {
+	while ((opt = getopt(argc, argv, "PVvHhmt:X:c:r:Z:s:S:p:")) != -1) {
 		switch (opt) {
 		case 't':
 			cpu = optarg;
@@ -100,6 +101,9 @@ main(int argc, char **argv)
 		case 'h':
 			usage ();
 			break;
+		case 'm':
+			s51_monitor = 1;
+			break;
 		}
 	}
 	if (s51_port) {
@@ -174,10 +178,8 @@ s51_printf(char *format, ...)
 
 	va_start(ap, format);
 	vfprintf(s51_output, format, ap);
-#if 1
-	if (s51_port)
+	if (s51_monitor)
 		vfprintf(stdout, format, ap);
-#endif
 	va_end(ap);
 }
 
@@ -197,10 +199,8 @@ s51_read_line(char *line, int len)
 		s51_putc('\0');
 	fflush(s51_output);
 	ret = fgets(line, len, s51_input) != NULL;
-#if 1
-	if (s51_port)
+	if (s51_monitor)
 		printf("> %s", line);
-#endif
 	fflush(stdout);
 	return ret;
 }
diff --git a/s51/s51.h b/s51/s51.h
index 7c96e2a6..eab61452 100644
--- a/s51/s51.h
+++ b/s51/s51.h
@@ -21,6 +21,7 @@
 extern char *s51_prompt;
 extern struct ccdbg *s51_dbg;
 extern int s51_interrupted;
+extern int s51_monitor;
 
 enum command_result {
 	command_success, command_debug, command_syntax, command_interrupt, command_error,
-- 
2.30.2