$ECF0/60656: Low Byte Screen Line Addresses ECF0: 00 28 50 78 A0 C8 F0 18 ECF8: 40 68 90 B8 E0 08 30 58 ED00: 80 A8 D0 F8 20 48 70 98 ED08: C0 Previous Page / Next Page Kernal-Reference: LDA $ECF0,X : $E9F0 LDA $ECF1,X : $E907