--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lldbg/cmd_w16.c	Thu Jun 09 00:02:41 2016 +0000
@@ -0,0 +1,30 @@
+/*
+ * w16 hexaddr xxxx -- write a 16-bit register or memory location
+ */
+
+#include <sys/types.h>
+#include "types.h"
+
+void
+lldbg_cmd_w16(argbulk)
+	char *argbulk;
+{
+	char *argv[3];
+	u_long addr, data;
+
+	if (lldbg_parse_args(argbulk, 2, 2, argv, 0) < 0)
+		return;
+	if (lldbg_parse_hexarg(argv[0], 8, &addr) < 0) {
+	      lldbg_printf("ERROR: arg1 must be a valid 32-bit hex address\n");
+		return;
+	}
+	if (addr & 1) {
+		lldbg_printf("ERROR: unaligned address\n");
+		return;
+	}
+	if (lldbg_parse_hexarg(argv[1], 4, &data) < 0) {
+		lldbg_printf("ERROR: arg2 must be a valid 16-bit hex value\n");
+		return;
+	}
+	*(volatile u16 *)addr = data;
+}