[Diy_efi] Audi Chip

[Programmer]

You're probably as organized as me. I've got Bosch code mixed up with some
Dodge and GM stuff...gets hard to keep everything together, so I'm starting
to burn CD's of my directories. Thanks for any help--I send you that MAC11C
file later...

Lyndon

----- Original Message -----
From: "Gerard" <gerard at poboxes.com>
To: "List for general do-it-yourself EFI talk" <diy_efi at diy-efi.org>
Sent: Monday, March 31, 2003 12:19 PM
Subject: Re: [Diy_efi] Audi Chip


> Okay, here is what I found in my ancient and dusty archives.
>
> Item number 1: check out http://www.datarescue.com for the IDA Pro
> disassembler which handles the Hitachi 6303 microprocessors.
>
> Next, if the ROM is really an EPROM then it should be a HN482764 in the
> MAC11. If it is a one time programmable device then it is a HN6B64P, so
> I reckon that item you have there is perhaps one of these. Given the "B"
> and "13" ... well, one of us has bad eyesight. :P
>
> The I/O chip should be marked D2808C. The CPU is probably something like
> HD63B03XD, based on the Motorola 6802 with extra stuff in it I am told.
>
> One word of warning before you disassemble, find the tables and bump
> things up. The onboard MAP sensor is only going to go up to 1.9 bar MAP.
> I had the Motorola replacement part number around somewhere, but it is
> somewhere in the ancient inbox and I still have to find it.
>
> I'm going to send you my disassembled code for the MAC13A which is based
> on the MAC12 ECU, but just use it as a guideline because I have no idea
> how it relates to the MAC11 stuff. I will send you an e-mail address of
> someone who can help you with the MAC11 as he did the disassembly files
> for the MAC11 through MAC14.
>
> Basically, there are a couple timing maps in the unit along with boost
> and rpm maps, a checksum area and a overboost cut-out area. The ECU will
> start with one of the timing maps and it is picks up knock and retards
> timing beyond a limit then it switches to the other timing map which is
> set up for poor fuel.
>
> I do have (somewhere around here) a MAC13A ROM I pulled from a crashed
> Audi 200 turbo which was done by some Porsche tuning shop many, many
> years ago. I had the bin files, but ofcourse they're probably now on CD
> somewhere. How organised am I, huh? :)
>
> Stay tuned for more breaking news.
>
> I'll send it to your personal address so save the list of a Word
> document file.
>
> G.
>
> Programmer wrote:
> >
> > I couldn't get anything with a 2764 setting. Not sure why. My S4Dataman
says
> > this chip is a 512K Ram chip, but I know that's not correct. It does
appear
> > to be a '64--from the number at least.
> > If you can dig up more info, that'd be great.
> >
> > Lyndon
>
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