How to identify eprom

[nacelp]

> Thanks for the info.  I have a few more questions please based upon your
> previous response.  You mentioned an adapter to connect the memcal in the
> chip burner.  I am not sure that I have all the lingo down yet.  Is the
> memcal the entire chip housing.

Yes

 I see that the one I am looking at has 4
> chips on it.  I assume that I am only reprogramming the larger brown chip
> with the sticker covering the window?

Yes

Does that chip need to be removed
> from the main housing?

Not wiht using an adapter.  Get a AHW60G-NO  from Digi-key  800 344 4539.
It's largeenough to make two 28 pin adapters.  It's what I use.

What would you recommend for a chip burner?

I use Needhams, thou there are others

A chip
> eraser?

I use a Datarazer II, lots of sources, price shop the electronics sites.

  Do I make the adapter you mentioned?

When you see the part and know to cut it in two to do just the prom it gets
apparent.
Grumpy

  Thanks again.
>
> Dan Plaskett
> ----- Original Message -----
> From: "nacelp" <nacelp at bright.net>
> To: <gmecm at diy-efi.org>
> Sent: Sunday, February 06, 2000 4:54 PM
> Subject: Re: How to identify eprom
>
>
> >
> > > First let me say that I am relatively new to the list.  I recently
> pulled
> > a
> > > 7727 out of an 88 Cutlass complete with wiring harness for my TPI
> > conversion
> > > of my 61 355ci vette.  I am using a 91 Corvette TPI.  In my
educational
> > trek
> > > through the archives and other various sites I believe I have learned
> that
> > > most if not all of the 7730 and 7727 ecm applications used a 27C256
> eprom.
> > > First, is this correct?
> >
> > For at least your v-8 application all the proms, I've seen are 256.
> >
> >   Second, is it simply a matter of erasing the chip
> > > (I saw some sites referring to special ultraviolet lights for erasure)
> and
> > > using a burner to reprogram it with something like the software
> TunerCat?
> >
> > Just that easy, got to make an adapter for putting the memcal in the
chip
> > burner, there are a bunch of answers for that,
> >
> > > Third, where do you get the original bin file to start with?
> >
> > One other point is that you need to start with a v-8 memcal.  I'd
suggest
> > buying a new one from GM to make sure your starting with a "good known"
> > item.
> > Then have fun.  That will also give ya a .bin.  At the FTP there should
be
> a
> > AUJP, that is for a 91 auto TPI.  Oh also easier to start with the right
> > tranny .bin  the IAC function seems to be very different manual to auto.
> > Grumpy
> >
> >
> >   Thanks for the
> > > assistance.
> > >
> > > Dan Plaskett
> > >
> >
>
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