Hullo All;

I have a problem using a 16C64.

The following code:


00028 init    bsf     STATUS,5      ;go to
bank 1
00029         movlw   0x3F
00030         movwf   TRISA   ;set port a as
inputs
00031         clrf    TRISB   ;set ports,b,c
& d as outputs
00032         clrf    TRISC
00033         clrf    TRISD
00034         bcf     STATUS,5      ;back to
bank 0
00035         clrf    PORTA
00036         clrf    PORTB
00037         clrf    PORTC
00038         clrf    PORTD


When I single-step it on MPSIM, at the
instruction to clear PORTA, (00035) PORTA
remains at 3F and the program steps on to
the next instruction

Is this an oddity of MPSIM, the 16c64 or me?

Thanx for any help

________________________________________
Ken Parkyn              email:
K.Parkyn@sct.gu.edu.au
Office of Technical Services,  Electronics
Workshop
GRIFFITH UNIVERSITY Nathan Qld.4111
Australia
P.O.Box 185  Ph:(07)3875 7289
Fax:(07)38757151
________________________________________