[Gmecm] EPROM Identification- (from Australian Delco VR 5L Auto)

[Andrew Huxtable, IT Support, Lonsdale]

Could it be that this is not a standard chip and is an aftermarket
'performance' chip?  A picture is worth 1000 words.....

Andrew

-----Original Message-----
From: gmecm-bounces at diy-efi.org [mailto:gmecm-bounces at diy-efi.org] On
Behalf Of John Lawson
Sent: Monday, 28 March 2005 9:40 AM
To: gmecm at diy-efi.org
Subject: Re: [Gmecm] EPROM Identification- (from Australian Delco VR 5L
Auto)

Justin,
I'm not having trouble identifying the chipset, just the chip (EPROM),
hence 
my question, "Any idea what type of chip this is, and what parameters I
have 
to set to re-burn it?"

The EPROM's on earlier Delcos I'm used to often have the type on them
(eg 
27128), but when they don't,  there's at least a manufacturer's name.
All 
that is inscribed on the anonymous piece of silicon I'm dealing with is
in 
my original question below.

I'd be grateful of any information that might help me understand how to
put 
a new binary on it- ie either the manufacturer and model description, or
the 
parameters required by a burner.

Thanks,

John



----- Original Message ----- 
From: "Justin Albury" <justin at jacomms.com>
To: <gmecm at diy-efi.org>
Sent: Sunday, March 27, 2005 8:41 PM
Subject: Re: [Gmecm] EPROM Identification- (from Australian Delco VR 5L 
Auto)


> The fact that it is a PCM(642) says that its a Auto.  Manuals ran 
> ECM(082).  All
> autos had a 27C512 EPROM and all manuals had a 27C256.  All V6's had
Knock
> decode boards in the MEMCAL and only HSV type V8's had Knock decode 
> boards.
> if you are still unsure on the memcal type ....take a digital pic of
the 
> chipset
> or the knock board and i will let you know what type it is.
>
> Justin
>
>
>
>
> Quoting John Lawson <jg_lawson at optusnet.com.au>:
>
>> I've just bought a 1617642 PCM out of a VR Commodore V8 Auto (I
think), 
>> with
>> a memcal that has an EPROM with the following written on it:
>>
>> 1616 7633
>> BLUP 9350 980
>> SINGAPORE 0263
>>
>> This should be a 512 Kbit EPROM if it's what I think it is.  It had a
>> handwritten "Bullet 5118" or "Bullet 3118" sticker on it, but no
Delco 
>> silver
>> sticker.
>>
>> I've tried to read it as a 27C512, and it just downloads 8787, F7F7
and
>> FFFF's.
>>
>> Any idea what type of chip this is, and what parameters I have to set
to
>> re-burn it?
>>
>> Thanks,
>>
>> John
>
>
>
>
> 



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