some ECM clarifications, please

[Bruce Plecan]

-----Original Message-----
From: Steve Ravet <steve.ravet at arm.com>
To: diy_efi <diy_efi at efi332.eng.ohio-state.edu>
Date: Friday, October 02, 1998 7:22 PM
Subject: some ECM clarifications, please


>A couple questions I had while doing some work on the WWW page:
>
>1)  mempak refers to the EPROM in GM ECMs, right?

While some of the gray matter has decayed, the last I recall from
a gm service school was a memcal, which has a blue cover,
and from what I gather here on the list all the calibration data
is stored with in that.

A Prom as usually referred to is just eprom in a black plastic holder.
>
>2)  calpak refers to some socketed thing with resistors in it that runs
>the car if the ECM dies, right?

Called netres, and me gots mention of that right close.  Netres,
is for resistor network, and for like you said limp home mode,
Will do backup fuel delivery, it's fixed timing as I understand it.
>
>3)  On the codes for the bins, ie ANAL, is the four letter code unique
>among all ECMs?  Or might I find an ANAL '747 in addition to an ANAL
>'6965?

I've seen that exactly one time, and that was with a chip Holden,
and a USA chip.  Shannen has mentioned that he likes to have the
four numerical code with it to make sure it right.

  I want to know because I'm trying to organize the FTP site
>some.  Can someone look up (or tell me how to look up) the applications
>for various broadcast codes?  I'd like to have them listed also.

Many of the catalog listings seem to be about $70, tool folks
Snap-On, and such sell them.  Only real free source are obsolete
ones.  There are thousands of bins..  Mine is old, and stops at
92, but the price was right.  Some independent shop might want to
update, and sell the old one right.
>
>Ok, so that's three questions, not two.

OK< so there's some answers
Bruce
>
>--steve
>
>-- 
>Steve Ravet
>steve.ravet at arm.com
>Advanced Risc Machines, Inc.
>www.arm.com
>