minor changes

asm/asm_test.asm

@@ -1,26 +1,6 @@
 .ORIG x3000
-  AND R0, R0, #0
-  AND R1, R1, #0
-  AND R3, R3, #0
-  LEA R0, NUM
-  ADD R1, R1, R0
-  LD R2, ASCII
-
-FOR_LOOP
-  LDR R4, R1, #0
-  BRz END_LOOP
-  ADD R4, R4, R2
-  STR R4, R1, #0
-  ADD R1, R1, #1
-  BRnzp FOR_LOOP
-END_LOOP
-
-  PUTs
+LEA R0, HELLO_WORLD
+PUTS
 HALT
-
-ASCII .fill  x30
-NUM   .fill  x01
-      .fill  x02
-      .fill  x03
-      .fill  x04
+HELLO_STR .STRINGZ "Hello World!"
 .END

asm/helloworld

@@ -0,0 +1,26 @@
+.ORIG x3000
+  AND R0, R0, #0    ; Clear R0
+  AND R1, R1, #0    ; Clear R1
+  AND R3, R3, #0    ; Clear R3
+  LEA R0, NUM       ; pointer [mem]NUM
+  ADD R1, R1, R0    ; Store the pointer address of R0 into R1
+  LD R2, ASCII      ; load the ascii offset into R2
+
+FOR_LOOP
+  LDR R4, R1, #0    ; load the contents of mem address of R1 into R4
+  BRz END_LOOP
+  ADD R4, R4, R2    ; Add our number to the ASCII offset
+  STR R4, R1, #0    ; Store the new value in R4 into [mem] address R1
+  ADD R1, R1, #1    ; move our memory pointer down one
+  BRnzp FOR_LOOP    ; loop again until we get an x00 char
+END_LOOP
+
+  PUTs              ; print our string starting from [mem]address in R0
+HALT                ; Trap x25
+
+ASCII .fill  x30    ; Our ASCII offset
+NUM   .fill  x01    ; Our Number to print
+      .fill  x02
+      .fill  x03
+      .fill  x04
+.END