--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/simtool/writeops.c	Sun Mar 14 07:11:25 2021 +0000
@@ -0,0 +1,56 @@
+#include <sys/types.h>
+#include <string.h>
+#include <strings.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "simresp.h"
+
+update_bin_op(offset, data, len)
+	unsigned offset, len;
+	u_char *data;
+{
+	u_char cmd[260];
+	int rc;
+
+	/* UPDATE BINARY command APDU */
+	cmd[0] = 0xA0;
+	cmd[1] = 0xD6;
+	cmd[2] = offset >> 8;
+	cmd[3] = offset;
+	cmd[4] = len;
+	bcopy(data, cmd + 5, len);
+	rc = apdu_exchange(cmd, len + 5);
+	if (rc < 0)
+		return(rc);
+	if (sim_resp_sw != 0x9000) {
+		fprintf(stderr, "bad SW response to UPDATE BINARY: %04X\n",
+			sim_resp_sw);
+		return(-1);
+	}
+	return(0);
+}
+
+update_rec_op(recno, mode, data, len)
+	unsigned recno, mode, len;
+	u_char *data;
+{
+	u_char cmd[260];
+	int rc;
+
+	/* UPDATE RECORD command APDU */
+	cmd[0] = 0xA0;
+	cmd[1] = 0xDC;
+	cmd[2] = recno;
+	cmd[3] = mode;
+	cmd[4] = len;
+	bcopy(data, cmd + 5, len);
+	rc = apdu_exchange(cmd, len + 5);
+	if (rc < 0)
+		return(rc);
+	if (sim_resp_sw != 0x9000) {
+		fprintf(stderr, "bad SW response to UPDATE RECORD: %04X\n",
+			sim_resp_sw);
+		return(-1);
+	}
+	return(0);
+}