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diff --git a/misc/test_vm/src/geekos/util.asm b/misc/test_vm/src/geekos/util.asm
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+; This code is adapted from Kernel Toolkit 0.2
+; and Linux version 2.2.x, so the following copyrights apply:
+
+; Copyright (C) 1991, 1992 Linus Torvalds
+; modified by Drew Eckhardt
+; modified by Bruce Evans (bde)
+; adapted for Kernel Toolkit by Luigi Sgro
+
+%ifndef UTIL_ASM
+%define UTIL_ASM
+%include "defs.asm"
+%include "symbol.asm"
+	
+[BITS 16]
+	
+; The following were copied from ktk-0.2 bootsect.asm, and were presumably
+; from the Linux bootsect code.  I changed them a little so they
+; don't clobber the caller's registers.
+
+EXPORT PrintHex
+
+[SECTION .text]
+; Print the word contained in the dx register to the screen.
+align 8
+PrintHex:
+	pusha
+	mov   cx, 4      	; 4 hex digits
+.PrintDigit:
+	rol   dx, 4      	; rotate so that lowest 4 bits are used
+   	mov   ax, 0E0Fh		; ah = request, al = mask for nybble
+   	and   al, dl
+   	add   al, 90h		; convert al to ascii hex (four instructions)
+   	daa			; I've spent 1 hour to understand how it works..
+   	adc   al, 40h
+   	daa
+   	int   10h
+   	loop  .PrintDigit
+	popa
+   	ret
+
+; Print a newline.
+align 8
+PrintNL:			; print CR and NL
+	push	ax
+	mov	ax, 0E0Dh	; CR
+       	int	10h
+       	mov	al, 0Ah		; LF
+       	int	10h
+	pop	ax
+       	ret
+
+	
+%endif