Hi Salvador,

I don't know if you mean 7 to save & retrieve or 7 just to save, so here is
what I use on an 16C84. It is 7 for save & retrieve.

Obviously SaveW & SaveS are two registers that are not used for anything
else.

;--------------------------------------------------------------------------
;on going into the interrupt

Interrupt                       ;interrupt every 2mSec

        movwf   SaveW           ;Location to save W
        swapf   Status,W        ;move Status to W - not affecting flags
        movwf   SaveS           ;Location to save Status

; exit interrupt

        swapf   SaveS,W         ;get back Status
        movwf   Status
        swapf   SaveW           ;swap digits in SaveW (No Status effect)
        Swapf   SaveW,W         ;and get back to W (No Status effect)
        retfie                  ;return from interrupt (Set GIE to 1)

;------------------------------------------------------------------------

Cheers
        Dennis


____________________________________________________
FROST - Electronic Design, Manufacture & Consulting.
Dennis Frost
Tel:   +27 331 965125
Cel:   +83 2275216
Email: dennis.frost@pixie.co.za
Pietermaritzburg, South Africa
____________________________________________________

----------------snip---------------------
> 1) Anybody knows a short way to save the W and STATUS regs in the
interrupt
> routine (short means less than 7 instruction, that's the length of my
actual
> code to do this)?
> 2) I saw the code generated by the mplabc from Microchip but this code
doesn't
> save anything, Why?, Isn't very dangerous? I'm overlooking some special
> feacture of the PICs?
----------------snip---------------------