;RUTINA PROGRAMARE SERIAL 8251

MOV AL,0CEH
MOV DX,0DD2H
OUT DX,AL
MOV AL,15H
OUT DX,AL
RET

;RUTINA PROGRAMARE PARALEL 8255

MOV AL,81H
MOV DX,0D56H
OUT DX,AL
RET

;RUTINA TRIMITERE CARACTER SERIAL 8251

SERIALT:
IN AL,DX
RCR AL,1
JNC SERIALT
MOV AL,CL
MOV DX,0DD0H
OUT DX,AL
RET

;RUTINA PRIMIRE CARACTER SERIAL 8251

SERIALP:
IN AL,DX
RCR AL,2
JNC SERIALP
MOV DX,0DD0H
IN AL,DX
MOV CL,AL
RET