Hi again !

Thanks for the reply and sample code !

I would like to start out by telling about my assembler experience - i have
read and understood Easy PIC'n by david benson and played alot around (so
far sucessfully) thats all

I cant seem to find some of the instructions you use in my list:

These are: PCL , PCLATH

As far as i understand from the PIC memory map the PCLATH is some kind of
address table which (please correct me if im wrong - which i probertly am)
is a better way of writing Tris right ?

PCL now thats more tricky because i cant seem to find any reference to this
command anywhere


Im most sorry that i didnt specify that the Target PIC is a 12C509A this is
ofcause a vital information.
but how ever if the code cant be executed on the target please let me know
as the 16C54 would be fine also.

Im not totally sure about your code, lets assume again that the target is
the 12C509A and i initialize it as is:

portb equ 0x06
org 0x000
start  movlw b'111100'
 tris portb

As we can see the we have the 4 input ports assigned and 2 output ports.

As im not totally aware of the functions of your code i "allow" my self to
ask these stupid questions:

movlw   high tb       ; doesnt "high" or "tb" need to be assigned as an
equate some where or is this some kind of special assembler command ?

movwf   PCLATH
movf    PORTB,W       ; Will this work when theres output ports assigned on
portb also ?

andlw   15    ; this i understand :)
tb  addwf   PCL,F         ; But ! which bits are MSB and LSB ???  - sorry
for asking stupid !

goto    target0000 ; this i understand :)
...

I thank you alot for the code you wrote and hope that you will help me get
on with assembler.

Best regards
Lasse Madsen

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