diff --git a/asm/hello_world.as b/asm/hello_world.as
index a146665..f5f5b25 100644
--- a/asm/hello_world.as
+++ b/asm/hello_world.as
@@ -1,33 +1,33 @@
 
 ; -- Store "Hello World" string in memory.
-movl 	$1, 72 ; H
-sw	$0, $1, 0
-movl 	$1, 69 ; E
-sw	$0, $1, 1
-movl 	$1, 76 ; L
-sw	$0, $1, 2
-sw	$0, $1, 3
-movl 	$1, 79 ; O
-sw	$0, $1, 4
-movl 	$1, 32 ; Space
-sw	$0, $1, 5
-movl 	$1, 87 ; W
-sw	$0, $1, 6
-movl 	$1, 79 ; O
-sw	$0, $1, 7
-movl 	$1, 82 ; R
-sw	$0, $1, 8
-movl 	$1, 76 ; L
-sw	$0, $1, 9
-movl 	$1, 68 ; D
-sw	$0, $1, 10
+movl 	$0x1, 72 ; H
+sw	$0x0, $0x1, 0
+movl 	$0x1, 69 ; E
+sw	$0x0, $0x1, 1
+movl 	$0x1, 76 ; L
+sw	$0x0, $0x1, 2
+sw	$0x0, $0x1, 3
+movl 	$0x1, 79 ; O
+sw	$0x0, $0x1, 4
+movl 	$0x1, 32 ; Space
+sw	$0x0, $0x1, 5
+movl 	$0x1, 87 ; W
+sw	$0x0, $0x1, 6
+movl 	$0x1, 79 ; O
+sw	$0x0, $0x1, 7
+movl 	$0x1, 82 ; R
+sw	$0x0, $0x1, 8
+movl 	$0x1, 76 ; L
+sw	$0x0, $0x1, 9
+movl	$0x1, 68 ; D
+sw	$0x0, $0x1, 10
 
 ; -- setup print loop.
-movl 	$1, 1		; Load 1 in R1 (used for increment the counter)
+movl 	$0x1, 1		; Load 1 in R1 (used for increment the counter)
 _start:
-ld	$15, $0, 0	; Load memory address stored in R0 into R15
-int     $10, 2		; Print character
-add 	$0, $0, $1	; Add 1 (R1) to counter (R0)
-beq	$15, $2, 1	; Branch to "noop" (skipping next instruction) if R15 = 0 (R2 holds 0)
-jmp     _start		; jump back to "_start" label
+ld	$0xF, $0x0, 0		; Load memory address stored in R0 into R15
+int	$0xA, 2			; Print character
+add	$0x0, $0x0, $0x1	; Add 1 (R1) to counter (R0)
+beq	$0xF, $0x2, 1		; Branch to "noop" (skipping next instruction) if R15 = 0 (R2 holds 0)
+jmp     _start			; jump back to "_start" label
 noop