diff --git a/wozmon.cc b/wozmon.cc
index 95685ed..7434aa5 100644
--- a/wozmon.cc
+++ b/wozmon.cc
@@ -106,7 +106,8 @@ void wozmon() {
     uint32_t cur_addr = 0;
     uint32_t cur_data = 0;
 
-    char inbuf[64] = {};
+    char inbuf[64];
+    inbuf[0] = 0;
     char* inptr = inbuf;
 
     while (1) {
diff --git a/wozmon.s b/wozmon.s
index 64fa19e..db462f1 100644
--- a/wozmon.s
+++ b/wozmon.s
@@ -96,19 +96,13 @@ _ZN12_GLOBAL__N_114WriteHexNibbleEh:
 	.global	main
 	.type	main, @function
 main:
+    movw    $0x8000, %sp
 	movw	%sp,	%bp
 	subw	$76,	%sp
+	movb	$0,	-64(%bp)
 	leaw	-64(%bp),	%di
-	movw	$64,	%ax
-	pushw	%ax
-	xorw	%ax,	%ax
-	movw	%ax,	%es
-	pushw	%ax
-	pushw	%di
-	call	memset
-	addw	$6,	%sp
-	movw	%es,	%si
-	movw	%es,	-70(%bp)
+	xorw	%si,	%si
+	movw	%si,	-70(%bp)
 .L18:
 #APP
 ;# 11 "wozmon.cc" 1