;
; Author:	Elektor
; Software:	ESS 543 IC10
; Project:	High Res Graphics Board
; Function:	Row Address Decoder
; Indentifier:	IC10
; Device:	82S123
;
; Could be ported to a PAL16L8
;
; A4 = !RAS
; A3 = !ALL
; A2 = MSL2
; A1 = MSL1
; A0 = MSL0
;
;
;
.cpu 6502
.org 0 
;
; Assembles online at https://www.asm80.com/
;
;
; collective accessing
	.db	$00
	.db	$00
	.db	$00
	.db	$00
	.db	$00
	.db	$00
	.db	$00
	.db	$00
; selective accessing
	.db	0b11111110	; !RAS0
	.db	0b11111101	; !RAS1
	.db	0b11111011	; !RAS2
	.db	0b11110111	; !RAS3
	.db	0b11101111	; !RAS4
	.db	0b11011111	; !RAS5
	.db	0b10111111	; !RAS6
	.db	0b01111111	; !RAS7
; no accessing
	.db	$FF
	.db	$FF
	.db	$FF
	.db	$FF
	.db	$FF
	.db	$FF
	.db	$FF
	.db	$FF
; no accessing
	.db	$FF
	.db	$FF
	.db	$FF
	.db	$FF
	.db	$FF
	.db	$FF
	.db	$FF
	.db	$FF
.end