Andrew Mayo wrote:

> Hear hear!. But also my pet gripe. Please may we have a CMP
> instruction.
> It is very aggravating that you cannot test a register for a value
> without destroying W or another register (AFAIK). And could Mchip take
> the individual responsible for the bizarre sublw instruction and the
> backwards behaviour of the C flag and shoot him or her before they
> design any more microcontrollers. Finally can we have an instruction
> to
> save W and status when servicing an interrupt and another to restore
> them to avoid this silly swapf mumbo-jumbo - ingenious but peculiar.
>
I'd go along with that 10,000%! While we're at it, how about being able
to indirectly address individual register bits, so you could step your
way through register bits for various bit tests and operations.

> Take heart - code-protected devices *can* be saved - use a germicidal
> UV
> lamp to restore them from the dead - takes about 10 mins. Feeble EPROM
> erasers don't cut it for this task.
>
And they're really really really sanitary when you're done, too! ;-)

-Frank


Frank Richterkessing

FRANK.RICHTERKESSING@APPL.GE.COM