AND GR1, 0

LOAD GR0, *0xFE
AND GR0, 0xF
STORE GR0, *0xFF
ADD GR1, *0xFF

LOAD GR0, *0xFE
LSR GR0, *4
AND GR0, 0xF
STORE GR0, *0xFF
ADD GR1, *0xFF

LOAD GR0, *0xFE
LSR GR0, *8
AND GR0, 0xF
STORE GR0, *0xFF
ADD GR1, *0xFF

LOAD GR0, *0xFE
LSR GR0, *12
AND GR0, 0xF
STORE GR0, *0xFF
ADD GR1, *0xFF

STORE GR1, *0xFF

HALT GR0, *0

STORE GR1, *0xFF