checker_board.asm

; Description:

INCLUDE Irvine32.inc

SetColor PROTO forecolor:BYTE, backcolor:BYTE
WriteColorChar PROTO char:BYTE, forecolor:BYTE, backcolor:BYTE
PrintRowOdd PROTO color:BYTE
PrintRowEven PROTO color:BYTE

.data

rows = 8
columns = 8
horizCharsPerSquare = 2

.code
main PROC
	mov ecx, rows /horizCharsPerSquare

L1: INVOKE PrintRowOdd, gray
	call Crlf
	INVOKE PrintRowEven, gray
	call Crlf
	loop L1

	INVOKE SetColor, lightGray, black
	call Crlf

	exit

main ENDP

PrintRowOdd PROC uses ecx,
	color:BYTE

	mov ecx, columns / 2

L1: INVOKE WriteColorChar, ' ', color, color
	INVOKE WriteColorChar, ' ', color, color
	INVOKE WriteColorChar, ' ', white, white
	INVOKE WriteColorChar, ' ', white, white

	loop L1

	ret

PrintRowOdd ENDP

PrintRowEven PROC uses ecx,
	color:BYTE

	mov ecx, columns / horizCharsPerSquare

L1: INVOKE WriteColorChar, ' ', white, white
	INVOKE WriteColorChar, ' ', white, white
	INVOKE WriteColorChar, ' ', color, color
	INVOKE WriteColorChar, ' ', color, color

	loop L1

	ret

PrintRowEven ENDP

SetColor PROC, forecolor:BYTE, backcolor:BYTE
	movzx eax, backcolor
	shl eax, 4
	add al, forecolor
	call SetTextColor

	ret
SetColor ENDP

WriteColorChar PROC USES eax,
	char:BYTE, forecolor:BYTE, backcolor:BYTE
	
	INVOKE SetColor, forecolor, backcolor
	mov al, char
	call WriteChar

	ret
WriteColorChar ENDP

END main

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; OUTPUT
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