> From: Victor Moisey [mailto:VMOISEY@ICH.UCT.AC.ZA]

> From the data manual:
> "Example 14-1 and Example 14-2 store and restore the STATUS and W
> registers. For the PIC16C74 and PIC16c73, the register,
> W_TEMP, must be
> defined in both banks and must be defined at the same offset
> from the the
> bank base address (i.e., if W_TEMP is defined at 0x20 in
> bank0, it must
> also be defined at 0xA0 in bank 1)."

> My problem is that defining W_TEMP in both banks produces an
> error.

Put the lines

W_TEMP  equ     20
W_TEMPBk1       equ     W_TEMP+80

into your code, that's all.

The command "movwf W_TEMP" in the interrupt will now addresses 20 or a0,
depending on STATUS,RP0.
The definition of W_TEMPBk1 is just for your remembrance, that a0 is in
use.

Martin Gramatke