Hi,
I do not understand your problem. Erased 14-bit core chips (those
mentioned by you) should read definitely 3FFF. I. e. they are blank. 0
what you have read is a mistake... a BIG mistake.

A small hint according P16Pro and speed: if it is suspicious for you,
there is in P16PRO.INI an entry called AutoAdjustment. You should turn it
on, and do a read cycle. It will be set up for you.

I hope it helps.

Imre


On Tue, 26 Jan 1999, Bill Arkin wrote:

> Can anyone cast some clarity upon this deadend situation?
>
> PBP compiled program about to go into brand new Digikey 16C74B's.  I have
> ITU PIC-1a programmer and new Datarase.  I go to read it before programming
> and I get a stream of 3FFF all through.  Hours of erasing and the same
> results on two different chips.  I download P16Pro software and get the same
> results.  I build a PIC001 programmer I had here and again get the same
> results.  Then I test a 16F84 on the ITU and it finally reads  the 0000's.
> I try another small 18 pin PIC, new OTP 16C71, and it again reads the 3FFF
> pattern.  I try a different cable.  I try all the parallel port settings,
> SPP, EPP, ECP, etc.  I try a different PC.  I make the test of no PIC
> inserted in the programmer and it returns 3FFF!  Why is no chip like all
> these other non EEPROM pics?  Interesting that on all chips and using both
> programmers, the blank test returns the result of all memory being blank yet
> the read appears to be faulty.  Of course, no programming is possible.
>
> I know that the timing factors for programming an EEPROM PIC are different
> than
> the windowed brethren.  And I think that could be significant here.  Another
> common factor is that both the computers are 300Mhz AMD's.
>
> Could it be that these DOS programs for programming the PIC's are not
> handling the CPU speed or type?  Anyone using the same computer platform
> with these devices or software?
>
> I really need some help....anyone have a clue??
>
> Bill Arkin
> **25 Years of Laser Services**
>            Holo-Spectra Inc.
>            7742B Gloria Ave.
>          Van Nuys, CA 91406
>               818 994-9577
>            www.lasershs.com
>
>