LD A, 123
LD BC, 12356
LD A, FEFEh
LD A, %00001111
LD A, $FE
LD A, ($FE)
LD HL, $FEFE
EX AF, AF'
LD A, 0FEFEh
LD BC, 12356
 
; Forma 1
LD BC, FFFEh
IN A, (C)       ; A = Lectura de puerto FFFEh
 
 
EX AF, AF'      ; Se cierra con ', correcto
LD BC, $FFFF