annotate assembler

md/Atari/entries/two-plus-two.md

@@ -4,13 +4,15 @@
 10 ;
 20 ;ADDNRS.SRC
 30 ;
-40        *=$0600
+40        *=$0600    ; Begin program at 1536 decimal.
 50 ;
-60        CLD
-70 ADDNRS CLC
-80        LDA #2
-90        ADC #2
-100       STA $CB
-110       RTS
-120       .END
+52 ;  See notes below this snippet for details
+54 ;
+60        CLD        ; Clear Decimal Mode 
+70 ADDNRS CLC        ; Clear Carry
+80        LDA #2     ; Load Accumulator From Immediate 2
+90        ADC #2     ; Add Immediate 2 To Accumulator With Carry
+100       STA $CB    ; Store Accumulator To Location 203
+110       RTS        ; Return To Stack
+120       .END       ; Program End Macro
 </pre>