Hi Steve;
Is it something like this?

;assuming p0.0-p0.3

mov dptr,#lookup;#1
loop:
mov a,p0;#2
clr acc.3;#3
movc a,@a+dptr;#4
jb p0.3,goto_p2;#5
mov p1,a;#6
jmp loop;#7
goto_p2:
mov p2,a ;#8
jmp loop;#9

;8 bytes
lookup:
db 01h,02h,04h,08h,10h,020h,040h,080h

Pranav