diff --git a/vga.asm b/vga.asm
index cee73f5..55c7995 100644
--- a/vga.asm
+++ b/vga.asm
@@ -79,7 +79,7 @@ _fillScreen_loop:
 _latchCopyCube:
   push ebp
   mov ebp,esp
-  ; we need an x and y variable
+  ; we need a y variable
   sub esp,4 ; y
 
   ; enable latch reads
@@ -99,9 +99,9 @@ _latchCopyCube:
 _latchCopyCube_yLoop:
   mov [ebp-4],cx ; put y back in loop
 
-  mov eax,[ebp-4] ; put y in ax
+  mov eax,[ebp-4] ; put y in eax
   dec eax ; offset by 1 for loop
-  ; can only multiply in ax
+  ; can only multiply in eax by register
   mov bl,80
   mul bl ; number of lines
   add eax,0xa0000 ; vga base address
@@ -109,8 +109,7 @@ _latchCopyCube_yLoop:
   ; start x loop
   mov cx,4
 _latchCopyCube_xLoop:
-
-  ; fill latches
+  ; fill latches via memory read
   mov bl, BYTE PTR [eax]
 
   ; write blank