remove duplicate mov's

messages.asm

@@ -55,9 +55,9 @@ mov dl, WIDTH	; right col number (80)
 int 0x10
 
 ;; Set cursor to bottom of screen
+;; dh already contains HEIGHT
 mov ah, 0x02	; set cursor position
 mov bh, 0x00	; page number
-mov dh, HEIGHT	; row (bottommost row)
 mov dl, 0x00	; col (leftmost col)
 int 0x10
 
@@ -71,8 +71,9 @@ int 0x10
 	cmp al, 0x00	; null
 	je .virtual_kbd_loop_init
 
-	mov ah, 0x01
-	mov dx, 0x00
+	;; print character to serial port
+	mov ah, 0x01	; transmit char
+	mov dx, 0x00	; COM1
 	int 0x14
 
 	cmp al, 0x08 	; backspace
@@ -142,9 +143,9 @@ newline:
 	int 0x10
 
 	;; Move cursor to beginning of screen
+	;; dh already contains HEIGHT
 	mov ah, 0x02	; set cursors position
 	mov bh, 0x00	; page number
-	mov dh, HEIGHT	; row
 	mov dl, 0x00	; col
 	int 0x10
 
@@ -316,5 +317,5 @@ is_from_virtual_kbd: db 0x00
 ;; Magic number must be in the last 2 bytes of the sector so
 ;; fill the binary with zeroes until it is 510 bytes in size
 ;; (magic number will use up the remaining 2)
-times 510 - ($ - $$) db 0
+;times 510 - ($ - $$) db 0
 dw 0xAA55 ;; Magic number to mark sector as bootable