--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/target-utils/c139explore/dac.c	Wed Oct 26 01:53:12 2016 +0000
@@ -0,0 +1,31 @@
+/*
+ * Code for exercising Motorola's vibrator, which is driven
+ * via the Iota auxiliary DAC on this phone.
+ */
+
+#include <sys/types.h>
+#include "types.h"
+#include "abbdefs.h"
+
+void
+cmd_dacon()
+{
+	abb_reg_write(TOGBR1, 0x20);
+}
+
+void
+cmd_dac(argbulk)
+	char *argbulk;
+{
+	char *argv[2];
+	u32 val;
+
+	if (parse_args(argbulk, 1, 1, argv, 0) < 0)
+		return;
+	val = strtoul(argv[0], 0, 0);
+	if (val > 0x3FF) {
+		printf("ERROR: argument out of range\n");
+		return;
+	}
+	abb_reg_write(AUXDAC, val);
+}