I've upgraded two 16B1 (older variety with seperate RS232 driver and
receiver).
I programmed a BLANK 17C44 with the Phoenix code (a friend did this for
me). Both units have been modified to program all 16C devices with no
problems so far and this was done about 1 year ago.

I have programmed 16C877 devices down to 12C508's with no problems so
far.

The best and simplest test is to read and program a 16C84 as the 16B1
could handle this with no adapters. If this works then check your
adapter wiring very carefully.

Brent Brown wrote:
>
> Hi Bernard,
>
> Great to see someone else local on the PIClist!
>
> I have been silently watching threads on upgrading 16B1's as I have
> one myself that I would like to upgrade. Hope you get it sorted
> soon, then I'll follow your lead and upgrade mine. I have been trying
> to find out if a 16B1 will then be able to program a 16F877, I might
> be a little too optimistic, do you know the answer to this question?
> '508s are handled by my universal programmer OK but
> unfortunately it doesn't support the '877.
>
[ stuff deleted]

Nino.
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