On Sat, Aug 03, 2002 at 04:36:21PM +1200, Jinx wrote:
> Tony, why do some of your instructions include the ,A ?

It's the 18XXXX "access bank". It's a special memory designation that consists
of the special function registers + 128 bytes of handily accessible general
purpose RAM in bank 0. It's special because you can access it directly without
having to switch/setup the bank select register. It's described in secton 4.10
of the 18FXXX datasheet.

>
> eg
>
> INCF    i2c_State,F,A           ; update I2C state variable
> BSF     SSPCON2,SEN,A   ; initiate I2C bus start condition
>
> but not with
>
> BSF    SSPCON2,RCEN  or  MOVWF   BuffBankFSR
>
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