GM Trip Computer

[TK]

It will only work with a P4 that outputs the DIC stream (8192) in the
scheduler. It listens to three message streams.

Terry
----- Original Message -----
From: Scott Feaver <scott at j-body.com>
To: <gmecm at diy-efi.org>
Sent: Wednesday, May 31, 2000 10:30 AM
Subject: RE: GM Trip Computer


> Ya, I did get the info..  it doesn't seem to like the sunbird as much
> though, it doesn't read the fuel guage line right, nor the aldl line..  I
> will play with it a bit more when i get some more free time.  I kinda
> figured it would be a drop in kinda thing, at least for everything but the
> aldl line.
>
> Scott
>
> -----Original Message-----
> From: owner-gmecm at diy-efi.org [mailto:owner-gmecm at diy-efi.org]On Behalf
> Of Shawn R. Lin
> Sent: Wednesday, May 31, 2000 12:49 AM
> To: gmecm at diy-efi.org
> Subject: Re: GM Trip Computer
>
>
> Scott Feaver wrote:
> >
> > I have a trip computer from an 1990 Olds Cutlass...  Does anyone have a
> > wiring diagram for this thing, so I can figure out how to get some
> readings
> > in another car?
> >
> > Also, would this unit just read off the ALDL line?  And if it does,
would
> > the computer need to be coded to send it info?
>
> Did you ever get the info you need on this trip computer?
> I have wiring info for it, but I left that at my parents' house.
> I was able to use the trip computer from an '89 Olds Ninety Eight
> Regency 3.8L in my '89 Cutlass 2.8L with no problems.  I have 2 extra
> such trip computers but haven't yet tried one in a car that doesn't have
> it.
> Earlier versions of this trip computer used an NEC 78D14 CPU which had
> on board ROM, but newer versions used a 78D10 CPU with outboard ROM on
> EPROM.  That CPU is supposedly based on the Z80.  If you're good at
> reverse engineering, I have a text file somewhere with the 78Dxx opcodes
> if you want it.
>
> Shawn
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