hello everyone!!

i got the code of darrel taylor's instant interrupts and eagerly tried his program of toggling an led. but when i tried to compile it inside microcode studio using PIC16F84A as the target processor, i get an assembler error that says like this:

Error[113]c:\progra~1\mecani~1\mcs\instan~1.asm 115:Symbol not previously defined (PIR1)

When i compiled it with PIC16F628A,it was succesful but has no hex file generated. Do i need to comment out some lines in his DT_INTS-14.bas and ReEnterPBP.bas include files?

any suggestions or comments is highly appreciated. Thank you very much!!