( blank ) :dev/r fff8 ( std read port ) :dev/w fff9 ( std write port ) :test 0010 ;x 1 ;y 2 |0100 @RESET #12 =x #1234 =y ~x ~y #ef =test BRK |c000 @FRAME BRK |d000 @ERROR BRK |FFFA .RESET .FRAME .ERROR