--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/simtool/writecmd.c	Thu Feb 11 23:04:28 2021 +0000
@@ -0,0 +1,65 @@
+#include <sys/types.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "curfile.h"
+
+cmd_update_bin(argc, argv)
+	char **argv;
+{
+	unsigned offset, len;
+	u_char data[255];
+	int rc;
+
+	offset = strtoul(argv[1], 0, 0);
+	if (offset > 0xFFFF) {
+		fprintf(stderr, "error: offset argument is out of range\n");
+		return(-1);
+	}
+	rc = read_hex_data_file(argv[2], data);
+	if (rc < 0)
+		return(rc);
+	len = rc;
+	return update_bin_op(offset, data, len);
+}
+
+cmd_update_bin_imm(argc, argv)
+	char **argv;
+{
+	unsigned offset, len;
+	u_char data[255];
+	int rc;
+
+	offset = strtoul(argv[1], 0, 0);
+	if (offset > 0xFFFF) {
+		fprintf(stderr, "error: offset argument is out of range\n");
+		return(-1);
+	}
+	rc = decode_hex_data_from_string(argv[2], data, 1, 255);
+	if (rc < 0)
+		return(rc);
+	len = rc;
+	return update_bin_op(offset, data, len);
+}
+
+cmd_update_rec(argc, argv)
+	char **argv;
+{
+	unsigned recno;
+	u_char data[255];
+	int rc;
+
+	recno = strtoul(argv[1], 0, 0);
+	if (recno < 1 || recno > 255) {
+		fprintf(stderr,
+			"error: record number argument is out of range\n");
+		return(-1);
+	}
+	rc = read_hex_data_file(argv[2], data);
+	if (rc < 0)
+		return(rc);
+	if (rc != curfile_record_len) {
+		fprintf(stderr, "error: hex data length != EF record length\n");
+		return(-1);
+	}
+	return update_rec_op(recno, 0x04, data, curfile_record_len);
+}