In message  <199703101403.JAA05256@mail4.uts.ohio-state.edu>
 PICLIST@MITVMA.MIT.EDU writes:
> Greetings:
>
>  Can a register and a particular bit be assigned a name.
>
> ie...
>
> btfss    snyc
>
> Where snyc would represent 6,1
>
> I tried equate with no luck, maybe a macro ?
>
Joseph,

I use #define. eg:

#define sync  6, 1
...

    btfss  sync

I find this to be invaluable for defining what is connected to the
pins on the PIC. For example, in a prototype I may have IIC memory.
SDA connected to porta, 0 and SCL to porta, 1.

In my code I would have

#define SDA porta, 0
#define SCL porta, 1

and later would have a routine which read data from the IIC device
and would refer to the port pins using only SDA and SCL:

  bcf   SDA         ; example only - not proper code :-)
  bsf   SCL
  bcf   SCL
  btfss SDA
  ...
  return

When I come to layout the PCB, I might find that the layout is
significantly easier if the pins were swapped. All I need to do
is change the #define lines.

Also, if you want to change the direction of the port pin you
can use the same #defined text. eg:

  bsf  status, rp0      ; goto page 1

  bsf  trisa, 0         ; produces the same code as
  bsf  SDA

  bcf  status, rp0      ; back to page 1

I hope this helps,

Mike Watson