Well, jump to location 0 or whatever the power_on routine is is good enough, but one thing is that you have to initialise EVERY SFR in the initialisation routine. Do not rely on default values especialy if you intend to do a soft reset.

One problem is that of pending interrupts, its a good idea to call a reti instruction a couple of time to get rid of them.

So it might go:

_00: jmp power_on

; any reti, label it to something
intr_retn:
reti ; spare location


power_on:
mov ie, #0 ; most important, disable all involuntary
; activities of the controller
acall intr_retn
acall intr_retn ; this will clear any pending ints

; go about your regular initialisation


Any comments?

Girish