diff --git a/zxbrainfuck/main.asm b/zxbrainfuck/main.asm
index bf0fbda..510cff6 100644
--- a/zxbrainfuck/main.asm
+++ b/zxbrainfuck/main.asm
@@ -4,7 +4,7 @@ org $7530
 ; System variables
 tv_flag     equ $5c3c   ; TV flags variable
 last_k      equ $5c08   ; Last pressed key
-clear_screen equ $0daf  ; Rom routine to clear the screen
+clr_screen  equ $0daf   ; Rom routine to clear the screen
 
 ; Brainfuck opcodes
 OP_INC_DP   equ ">"     ; $3e - 62
@@ -58,7 +58,7 @@ start
     ld (tv_flag), a         ; Enables rst $10 output to the TV
     push bc                 ; Save BC on the stack
 
-    call clear_screen
+    call clr_screen         ; Clear the screen with a ROM routine
 
     call clear_memory       ; Set all memory cells to 0
 
@@ -89,6 +89,8 @@ end_main
 
 ; -------------------------------------
 
+; Sets all BF memory cells to 0
+; Starts clearing at the end
 clear_memory
     ld bc, memory_size
 clear_memory_loop