seeking atmel 29c256

[David Griffith]

On Thu, 10 Jun 2010, Phill Harvey-Smith wrote:

> On 10/06/2010 07:13, David Griffith wrote:
>> 
>> Does anyone here know of a decent supply of 29c256 flash EEPROM chips or
>> a drop-in replacement? I'm having a nasty time trying to source these
>> for the P112 project.
>
> Farnell have several 28c256 chips which are pin compatible.

Ugh!  9 pounds each?  I need to buy around 90 of these.

The P112 was designed with a 32-pin socket for the boot ROM, so a 29F010 
(which I found for a good price) looks like it would work as long as pins 
1 and 2 are grounded.  I'm not quite sure yet.  Now to find whatever old 
version of Protel Dave Brooks used.  I should be able to make the change 
by directly modifying the gerbers, I guess.

I'm going to go to bed tonight rather annoyed.  Damn chips going out of 
production then the price goes sky-high.


-- 
David Griffith
dgriffi at cs.csubak.edu

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