;Screen Control Assembly Lanuage Routines for Apple 1 ;Clear the Screen CLRSCR: RTS ;Do Nothing (Drop to RTS) ;Move Cursor to Specified Coordinates SETPOS EQU CLRSCR ;No Action ;Get Cursor Position GETPOS: LDA #$FF ;Return Error TAY RTS ;Get Screen Size GETSIZ: LDA #40 ;40 Columns LDY #24 ;24 Lines RTS