Bryan Mumford wrote:

> I would say the "CLRF   register, w" is non standard...

It's OK on the 18-series PICs *if* the value of w is "1" or "0".

> because the
> Microchip data sheets show no options on CLRF.

The data sheet for the 18-series PIC does. Have you specified
what PIC use are using ?

> The square root code
> in the archive uses both:
>
>      CLRF    register, f
>      CLRF    register, w
>
> As I said, I think I have converted these correctly to plain CLRF and
> CLRF with an extra CLRW.

Which could be wrong since the CLRF <file>,w  does *not* clear W, AFAIK.


> I was thrown by the use of "btfsc   ALUSTA,c" until I learned that
> the ALUSTA register is used in 17 family parts. I substituted the
> Parallax "snc" (skip no carry). Just to be cautious, I also tried
> "skip if carry".

Parallax ??  What processor *are* you using ?

> After my conversions of the posted routines to compile under the
> Tech-Tools assembler still failed to give me the square root of 25, I
> was offered an alternate routine by Scott Datallo. But his has a new
> assortment opcodes not listed in the Microchip data sheets. These
> include "setff" and "rcall".
>
> I've always used the Parallax extensions, but I had no idea there
> were so many other variations.

What are the "Parallax extensions" ?

Jan-Erik.

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