Jason asked for:
>#1      A routine to clear all RAM on startup (16F84)

How about:

  movlw  0x00C          ;  Start at the Beginning of RAM
  movwf  FSR
Loop
  clrf   INDF           ;  Clear the Current Byte Pointed to
  incf   FSR
  movlw  0x050          ;  Has all the RAM been Cleared?
  subwf  FSR, w
  btfss  STATUS, Z
   goto  Loop           ;  Nope, Do the Next Location

>#2      A routine for saving and restoring W,STATUS, etc..  during interrupts..

This is explained in an APNote (which I can't find right now).

But, in a nutshell, the registers that are changed are saved before the
interrupt is serviced:

int

  movwf  _w             ;  Store "W"
  movf   STATUS, W      ;  Store the Status Register
  movwf  _status
                        ;  Repeat the last two lines for the Registers Used

To return from the interrupt, the "w" Register has to be loaded without
affecting the zero bit (which will happen with a "movf" instruction).

                        ;  Load regs in reverse order to how they were saved
  movf   _status, W     ;  For example, the Status Register
  movwf  STATUS
  swapf  _w             ;  Restore "w" using an instruction that doesn't change
  swapf  _w, W          ;   "STATUS" Bits.  Swap nybbles in the Register and
  retfie                ;   then Swap them again and leave result in "W"

myke

>
>I suppose I could come up with some on my own...
>But who wants to re-invent the wheel..  (especialy this early in the
>morning...)
>Jason E. Brown
>Other Worlds
>3801 Dayton Blvd
>Chattanooga TN 37415
>(423)870-1074
>
>othrwrld@cdc.net = business.
>jebrown@cdc.net   = me.
>
>

"My ancestors didn't spend millions of years clawing their way to the top of
the food chain, just so I could become a vegetarian"