RE: Problem reading original EPROM

["Marteney, Steven J." <smarteney@xlvision.com>]

Nope.  This is straight from a Needham's PC EPROM programmer.  Anyone out
there reading OEM chips?  According to the ECMguy's site, location $0008
should read $6E for an 89 165 F-body 350TPI.  My internal buffer after
reading the PROM verifies that, but, like I said, the checksum is different
everytime.

Help is greatly appreciated.  My guess is maybe this is a slow EPROM and I'm
commanding the reader to read it too fast, but I don't know.
Steve 


		-----Original Message-----
		From:	Patrick G. Moore [mailto:pmoore@cmr.gov]
		Sent:	Monday, May 08, 2000 2:40 PM
		To:	gmecm@diy-efi.org
		Subject:	Re: Problem reading original EPROM

		"Marteney, Steven J." wrote:
		> 
		> Do these things have a security bit?  I tried to read the
original EPROM for
		> my 165 ECM (89 F-body 350 TPI) and the programmer keeps
giving different
		> checksums every time I check it.  The code is APYU3516.
What should the
		> programmer be configured for?  The chip doesn't have a
recognizable part
		> number (LAE8824).  ECMGuy's page says it is a 27C128.
What am I doing
		> wrong?  Any hints?
		> 
		> Thanks in advance,
		> Steve Marteney
		Hi,

		Are you using the pocket programmer?  I had some trouble at
first reading
		my eprom.  You must make sure you don't have the chip in
there before
		you initialize it from the PC.  It would look like it read
fine, but it
		would not verify, until I carefully followed the
instructions.

		HTH
		Pat

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