Memcals & Netres

[Jon Fedock]

What motor/transmission combo is this? Just for comparison purposes I
reverse-derived some of the resistor networks and put them in incoming some
time ago as 165netres.bmp and 6cylnetres.bmp (sorry so rough, paint was all
I had). Also, if anyone has any v-8 730/727 memcals for sale cheap I need
one (for testing purposes) thanks.
Jon

----- Original Message -----
From: Malcolm Robb, LC 0112G <Webmaster at lotus-carlton.fsnet.co.uk>
To: <gmecm at diy-efi.org>
Sent: Tuesday, May 08, 2001 4:27 PM
Subject: Re: Memcals & Netres


: This development MEMCAL's netres is discrete resistors only.  The
production
: MEMCAL as fitted to my car has these resistors integrated into 2 'chips',
: which I understand is normal. Whilst I don't doubt that this combination
of
: resistors is unique to my type of car (a 1990 Vauxhall/Opel Lotus
Carlton),
: it should give anyone trying to decypher their own netres's resistor
values
: an idea of the connectivity. You'll need to be good friends with Mr Ohm
and
: Mr Thevenin though !
:
: I have compared the EPROM code in the development MEMCAL with my car's
: production one, and everything is the same except for 2 values in one of
the
: Spark Advance tables. I also know that the development MEMCAL works in my
: car. Therefore <flame suit on> I'm assuming that both the ESC and NETRES
are
: discrete component implementations of the production version.
:
: If anyone wants to redraw the circuits in a more user friendly way, I have
: no objections. Use the circuits, photos and info as you want, at your own
: discression & risk. It would be nice to produce a 'TurboP4.pdf" style
: document covering the Memcal & Netres.
: <flame suit off>
:
: Cheers,
: Malcolm Robb
:
: ----- Original Message -----
: From: steve ravet <sravet at arm.com>
: To: <gmecm at diy-efi.org>
: Sent: Tuesday, May 08, 2001 6:22 PM
: Subject: Re: Memcals & Netres
:
:
: > Is this netres a chip, or is it actually discrete components?
: >
: > --steve
: >
: > "Malcolm Robb, LC 0112G" wrote:
: > >
: > > Hi,
: > > A few months ago I came across a development MEMCAL for the 01228331
ECU
: > > used in my Lotus. I've discussed it off list with a few people, but I
: don't
: > > think the information has got public here yet. Anyway, I've traced out
: the
: > > circuit diagram, and made a pdf file from it together with some
photo's.
: > > I've put it on incoming as ftp://ftp.diy-efi.org/incoming/memcal.pdf
: > >
: > > I haven't bothered with the EPROM part of the MEMCAL, coz we all know
: how
: > > that's wired in, don't we ! But I have worked out the NETRES and ESC
: filter
: > > components. If you have any questions, or want me to measure anything
: else,
: > > please be quick because the MEMCAL's owner has asked for it back !
: > >
: > > Cheers,
: > > Malcolm Robb
: > --
: > Steve Ravet
: > steve.ravet at arm.com
: > ARM,Inc.
: > www.arm.com
:
:
: --------------------------------------------------------------------------
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