simulator for 8051

Sir,
We are using 8051microcontroller.The program is written in assembly language but when compiled through Top View Simulator error occurs at instruction
MOV P1,A; It is displaying P1 as undefined symbol.Tell us about other simulators.

try using proteus VSM co-simulator. it supports keil integration and will give you the realtime results. you can download the demo from..
www.labcenter.co.uk
if you are simulating lcd.. then please dont use any simulator except proteus. coz.. the real time results are not given by any other simulator software.

plz reply , how to get the full version of this proteus dem0 v. 6.9 . beacuse in proteus demo i can't save the design . otherwise send me crack .. if someone have the full version of cd then please upload it ....

sorry but we dont have crack stuff on the site. well.. you can just try the design.. what else you want from demo.. or google it.. if u need the crack

u can use RIDE51 from raisonance..

i think he was asking for free..

try with keil or edsim51