aldl protocol

[Ronald T. Webb]

I've got the engine/ecm/etc for a '92 tracker, that I will be using in a
homebuilt aircraft project.

The ECM is NOT GM. It is made by Mitsubishi, based on the MELPS 7700
microcontroller (6502 upgrade popular in Japan). The components are proprietary,
and I cannot even identify the EPROM with certainty.

Mitsubishi's web site is quite good, with a lot of data sheets for these chips,
but the chip that I think is the EPROM does not compute...It may be a RIOT chip
(ROM-I/O-Timer).

It would be interesting to follow your project, and I may be able to help...

Pat Ford wrote:

> On Tue, 5 Jan 1999, Bruce Plecan wrote:
>
> > Date: Tue, 5 Jan 1999 09:56:01 -0500
> > From: Bruce Plecan <nacelp at bright.net>
> > To: diy_efi at efi332.eng.ohio-state.edu
> > Subject: Re: aldl protocol
> >
> >
> > -----Original Message-----
> > From: Pat Ford <pford at qnx.com>
> > To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
> > Date: Tuesday, January 05, 1999 9:33 AM
> > Subject: aldl protocol
> >
> > There is lots of info about the ALDL, in the archives, but, are you trying
> > to access
> > the calibrations thru the ALDL?.  The only ones that I know that have that
>
> I'm trying to down load the calibrations, planning on eventualy doing a
> custom controller
>
> > access,
> > are the late Flash Prom series.  If your's does allow that would you share
> > how it's
> > done.
>
> when i pop the ecu open I'll report whats inside ( I'll try to draw a
> schematic)
>
> >   The ALDL can be used for diagnostics, and a scanner can be had for less
> > than the time to invent the link,
>
> wheres the fun in that 8*) , actualy this is a learning project as well,
> I am a class a mechanic and now a programmer, and want to try programming
> this beast
>
> >well again in the archives is alotta
>
> is there a search engine, and what are any helpful shortcuts
>
> thanks
>
> > material.
> > Bruce
> >
> >
> > >  Hi Folks;
> > > does anybody have the protocol used by gm on the aldl port.
> > >i have a 92 tracker and want to play around with some settings
> > >
> > >THANKS
> > >
> > >Pat Ford                           email: pford at qnx.com
> > >QNX Software Systems, Ltd.           WWW: http://www.qnx.com
> > >(613) 591-0931      (voice)         mail: 175 Terrence Matthews
> > >(613) 591-3579      (fax)                 Kanata, Ontario, Canada K2M 1W8
> > >
> >
> >
>
> Pat Ford                           email: pford at qnx.com
> QNX Software Systems, Ltd.           WWW: http://www.qnx.com
> (613) 591-0931      (voice)         mail: 175 Terrence Matthews
> (613) 591-3579      (fax)                 Kanata, Ontario, Canada K2M 1W8