Right - most of 8052 clones have quite enough pins so you should be able to create a procedure that picks the right function depending on, say, a dip switch or a jumper attached to pins on a different port.
Say,

MOV P0,#FFh
MOV P1,#FFh
CLR C
LOOP:
MOV P0.0,C
MOV C,P0.1
LOOP2
JNB P1.0,DO_ANL
JNB P1.1,DO_ORL
JNB P1.2,DO_XRL
JMP LOOP2

DO_ANL:
ANL C,P0.2
JMP LOOP

DO_ORL
ORL C,P0.2
JMP LOOP

DO_XRL
;do your homework, there's no bitwise XRL in '52.
;so write your own.
JMP LOOP