LT1 obd2 disassembly

[Programmer]

Thanks !!

Lyndon.
----- Original Message -----
From: "Jason Haines" <jhaines15 at home.com>
To: "GM_ECM" <gmecm at diy-efi.org>
Cc: <nacelp at bright.net>
Sent: Thursday, August 30, 2001 5:51 PM
Subject: Re: LT1 obd2 disassembly


> That disassembly seems to be from a 1997 LT1 so it has to be an F-body
> (Camaro or Firebird - they used the same files in 1997). I think the
correct
> PCM part number for the 1997 LT1 F-body is 16242921. You can tell that the
> file is from a 1997 because the ID byte is 73 (it would be a 55 or 54 if
it
> was a 1996). The other half of the calibration should have an ID byte
value
> of 74.
>
> Jason
>
>
> ----- Original Message -----
> From: "Programmer" <nwester at eidnet.org>
> To: <gmecm at diy-efi.org>
> Sent: Thursday, August 30, 2001 3:27 PM
> Subject: Re: LT1 obd2 disassembly
>
>
> > Woah--you got my attention.
> > What's the app----what years ?
> >
> > Lyndon
> > ----- Original Message -----
> > From: Daa Wagon <daawagon at yahoo.com>
> > To: <gmecm at diy-efi.org>
> > Sent: August 29, 2001 7:51 PM
> > Subject: LT1 obd2 disassembly
> >
> >
> > >
> > > Years ago in the archives, there was a guy named T.H. working on
> > disassembling his obd2 LT1 PCM.  He has gone on to play with other toys,
> but
> > he has been kind enough to make it available.  It's pretty impressive,
if
> > that was me, I'd have gone thru a whole case of foil lined CSH's by the
> time
> > (if ever) I got that far ....
> > >
> > > Note that there are sections from $2000 up to $ffff and a second $8000
> to
> > $ffff which has to do with the bank switching to use a 128k eeprom.
It's
> > not obvious to me with just a quick look how it works, but I suppose I
> > should reread Motorola's how to on that:  AN432 - 128k byte addressing
w/
> > HC11.  I believe that this is the 't' side disassembly.
> > >
> > > Some of this may be common to the obd1 LT1, I learned a few things I
> > didn't know already, just looking at it for a little while.
> > >
> > > It's on incoming.
> > >
> > > ftp://ftp.diy-efi.org/incoming/LT1_obd2_tside_dis.zip
> > >
> > >
> > >
> > >
> > >
> > > ---------------------------------
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>
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