US Corrado G60 EPROM chip specs
-------------------------------
The G60 ECU is based on the Motorolla MC68HC11 cpu.
It's an 8 bit cpu that runs at 2MHz. It's roughly based on
the 6800 cpu, but with lots of extra things on board, from
what I can remember from the data sheet.
The program is stored in an EPROM that's quite easy to replace.
The EPROM chip only stores information on variable type settings,
the real code is usually someplace else in the car.
Also, the real code usually has default
settings that override any variable settings that might be too
far out of range.
This is probably there to protect VW and
control people like AutoThority and APS (Neuspeed).
[Jim Berilla / jb@falstaff.MAE.cwru.edu]
It appears that the code is the same in both [AutoTh vs OEM] chips.
The major difference is some tables of numbers.
Another difference is that AutoThority added a copyright
notice in the EPROM data. (The Bosch chip has no copyright notice,
neither on the label, nor in the EPROM data.) A few other bytes were
changed, I suspect to make the checksum come out right.
Desciption:
-----------
The chips used by VW [for the G60] are standard off the shelf stuff.
They have used several suppliers of the blanks, and they
have also switched to faster chips over the years.
The chips seem to be interchangable, though it is probably
better to go with the newer and faster chip.
Because AA & APS make no distinction between any of the G60
performance chips, it is reasonably safe to assume that they
all store the same type of info in the same locations.
Essentially, they are 256K generic EPROMs.
There are a total of 28 pins, 14 on each side (DIP).
See EuroCar (1990 or 1991) on how to gain access to the ECU
and the chip. Always disconnect the battery AND ground
yourself to the base of the ECU to avoid electrostatic dammage.
Anyone with an EPROM unit can download the info from these
chips back them up onto a floppy.
Newer/Faster chips:
-------------------
On the top there is a silver sticker (over the window)
and presumably it's Bosch/VWs number for the chip:
1 267 356 351
27C256-20
Than on the top of the actual chip it says:
Texas Instruments Logo
B 57 995
LDP8918
On the bottom side it says:
JL27C256D/074851
SINGAPORE 18
You have to look at the JL27C256 number, I was told that the
JL27 identifies it as a generic chip and the 256 is simply
the chip size, yes 256K. Commonly available. Used in the later
1990 G60's.
Older/Slower Chips:
-------------------
Silver Sticker:
1 267 356 189
LD27256-25
Top:
Intel Logo
857604
S7804
U910178MS
Bottom:
7851312TBC
PHILIPPINES HP08
Harder to find. Less energy efficient than the above. Used in the
early 1990 G60's.
VR6 Chips
---------
The chip used by APS for the VR6 has the following numbers:
dpi 89136N
M27512 F1
It looks like a 512k EPROM, though I am not sure what speed it is.
------------------------------------------------------------------------------
DISCLAIMER: Tampering with these chips may void warrantee and be
illegal in your state. The above are mere opinions.
There is absolutely no guarantee that any of this is correct.
EPROM contents are copyrighted!
The poster of this article is not necessarily the author and therefore
absolves him/herself from any liabilities!
DIGIFANT (Late A2 != Corrado)
=============================
From: porban@eeserv.ee.umanitoba.ca (Peter Orban)
Organization: Electrical Engineering, U of Manitoba, Winnipeg, Manitoba, Canada
The Digifant I have in my '88 Jetta has two processors in it:
an Intel 8039, and a Motorola SC 80984. The Intel is
connected to a 2764 EPROM. I have not heard about the Motorola
beast, but I guess it is a processor, as it has a 4MHz quartz
attached to it and has a UV vindow on it, just like other
Motorola microcontrollers.
The serial output goes to a simple light, and it flashes the
code out. You get to that mode by grounding that output
when you turn on the ignition. (It must be I/O line).
That feature was installed on '89 California cars. You can
find the detailed wiring and codes in the Bentley manual.
When I took apart my Digifant control box, I noticed, that
the output pin for the test light was wired up, but I had
no wires and connectors in the cable hooking up the box to
the engine and other parts of the car.
There is no aftermarket chip available for the Digifant controllers,
and I would guess, the reason being the dual processor architecture.
(Generally there is no way to read out code/data from programable
Motorola microcontrollers.)
If anyone knows more about the Digifant controller or the
Motorola processor, I would like to hear about it!
From: Marek_gh@ix.netcom.com (Gerald Marek)
Newsgroups: rec.autos.tech
Subject: VW G60 Power Chip & brain
Date: 8 Jan 1995 22:13:03 GMT
For some reason I blew up my controll unit (digifant 1). I had
to buy a new one from the dealer $700. I then went to fix the old one,
and found the two Opamp (tlc.....) to be blow. That fixed the problem.
So if your car smokes every time you step on the gas it is probably the
opamps amplifing the oxygen sensor signal. They are about $5 from
Newark. I now have the new brain (still under warranty) for sale. Also I
would be willing to sell the power chip from Autotech (Stage 1).
chip $160
Brain $375
Both $500
Gerald
Marek_gh@ix.netcom.com
(912) 952 0592 leave msg.
Date: Fri, 13 Jan 1995 14:41:14 -0800
From: Marek_gh@ix.netcom.com (Gerald Marek)
Subject: Re: brain
You wrote:
>
>I have a question for you...how did you figure out what was
>wrong with G60 ECU?
Well It ran fine. By this I mean that it kept it's idle, it idled high
when cold and normal when warm... So I knew that the brain still
controlled the engine, but it just ran rich (black smoke and black
residue on bumper). So I knew that the information to the ECU was
somehow 'distorted'. I checked all my sensors mainly the O2 sensor and
all was fine. So the amplification of one of the input signals was off.
A opamp is used to amplify a signal. Should the opamp fail, the signal
will still make it to the uprocessor, but it will not be amplified - in
fact it will be decreased in power. There are two opamps in the brain
that have a very high input impedence 10^12 Ohms. This means that the
opamp will not degrade the signal by 'sucking' up any current like
normal opamps. These high impedence opamps are used only when dealing
with extremly low current signals, such as most automotive sensors.
The only draw back to these high impedence opamps is that they
are very, very, very static sensitive. By just touching one (if you are
not grounded) you run the risc of blowing one.
All in all just replace all the opamps that start with TlC....,
which are these high impedence op amps. You can order them from NeWark.
If the ECU is blown such that it does not work at all, no more idle,
then the uProcessor may be blown. No help there, since the software is
embedded in these. So just replacing the uP will not fix it, you would
also need an uP programmer (hardware) and the software that goes in
them.
Hope this helps, if you need more information please Email, I will be
glad to give any electrical help.
Gerald
Marek_gh@ix.netcom.com
From: millerb@pt9217.ped.pto.ford.com (Bryan Miller)
Newsgroups: rec.autos.vw
Subject: Re: Make your own replacement chip
Date: 10 Jan 1995 14:34:54 GMT
jhamill@tiac.net appears to have written:
>In <3esj4p$qlv@pt9201.ped.pto.ford.com>, millerb@pt9217.ped.pto.ford.com (Bryan Miller) writes:
>>Drbob27 (drbob27@aol.com) appears to have written:
>>>> If you started with the OEM values for the EEPROM
>>>>(available on the net) and tweaked them on your own you could
>>>>arrive at an effective replacement chip.
>
> If its so easy, try it.
Thank you, I have...
>>I'm not sure what timing maps have to do with anything. Since most
>>functions are stored as lookup table in memory all you really need
>>to do is locate the tables and play with the numbers (in small deltas)
>>until you get what you want. An example is A/F ratio tables and
>>multipliers. Most Superchips merely run the engine richer than
>>stoich or at least richer than the original calibration allowed.
>>Another thing to play with is the top speed fuel cut-out calibration.
>>This is usually just a number in memory that can be altered to suit
>>the driver's needs.
> Gee, if anyone is really interested, I have dissassembled G-60 EPROMS,
>it isn't all that interesting to look at unless you know Motorolla 68HC11 code.
>I have a 68HC11 assembler too, but as someone else stated, you need an
>emulator and a chassis dyno to get very far. The $250 isn't for the chip,
>it's for the time to write the software, which in this instance is labor
>intensive and time consuming. The program that runs the engine doesn't
>look too complicated, and the lookup tables aren't that huge, but without
>the right tools you'd be playing a massive guessing game.
A simulator or emulator will work. Motorola has free software for the
HC11 on their BBS. Access to a code profiler and a logic analyzer would
help also. A dyno is not needed. We use dynos here to arrive at
the baseline numbers. The calibration community further tweaks those
numbers by driving the car and calibrating by feel (and emission tests!)
and calculations involving torque and BHP. If it sounds emperical, well
it is... A dyno will only give you numbers that may or may not prove
out under real driving conditions.
cheers,
Bryan (millerb@ACM.org)
-----------------------------------------------------------------
"Imagination is more important than knowledge." - Albert Einstein
Date: Fri, 31 May 1996 01:37:47 -0400 (EDT)
From: Hulda Jowett
Subject: Chips (fwd)
This popped up on the quattro list today. Thought some may find it
interesting. An actual response from a company! Superchips claims 195 hp
for the G60 C with only a chip.
>'superchips' has used some grossly misleading and outright false =
>advertising here in the US claiming 'chip upgrades' where, in fact, the =
>chip's contents were never changed in any way whatsoever. I would avoid =
>them as well as avoiding TAP. Go with the true, experienced experts, IA, =
>it is worth the $.
>
>- -glen
>
I'm not going to get into an argument over this, but apart from the Eclipse
where we offered 255 HP and got it by mechanical means instaed of
electronic, what else have we done wrong?
Finally, your statement that we have misled and made false claims about chip
upgrades is WRONG. Our 300ZX single turbo and Isuzu Turbo kits have only
electrical parts in them, not electronic. BUT THEY ALL GIVE THE POWER WE CLAIM.
All chips and kit upgrades come with a 30day money back warranty so if its
not upto your standards you can return it. We only claim to get more power
so be careful what you put in writing, even on the net.
Peter Wales pjwales@magicnet.net
President Superchips Inc Orlando Fl
Chairman Superchips Ltd Buckingham England "Timing is everything"
Superchips home page with all the answers http://www.superchips.com