[Diy_efi] Re: Problem Reading '730 BINs...

[Mike Frels]

I searched through the boards for a while but did not find anything directly related to my type problem with a PB10. I am going to play with reading the chip again tonight and see what else I can come up with before I get disgusted and got to bed. I will prolly post to the forums with my problem as well tomorrow. 

I saw something interesting last night when looking at the files in the reader/burner's directory. The bins that I saved after reading them, even though they did not compare, were only 16KB in length. Exactly 1/2 of what I should be getting out of a 256 chip?????

Mike

-----Original Message-----
From: Stekman at comcast.net
Sent: Feb 10, 2004 9:42 PM
To: Mike Frels <mfrels at ix.netcom.com>, 
	A list for Do-It-Yourself EFI <diy_efi at diy-efi.org>
Subject: Re: [Diy_efi] Re: Problem Reading '730 BINs...

you said you are changing this over in a 86 camaro?  if so, have you checked out the thirdgen.org forums? 
> Bill,
> 
> Thanks for listening and responding. Please forgive me if I am not glib in 
> programming speak. It is not my trade. I just do this to be able to improve my 
> car. Anyway... when I do a checksum of the loaded bin in buffer it shows 8100 
> with a compliment of 7F00. Checksum of the device shows E600 with a compliment 
> of 1A00. What else can I provide that would be of use?
> 
> BTW I have attempted to read the bins of other eproms I have for a '730 ECM and 
> they all flunk the compare. The error will be at different locations but the 
> consistency is they all get an error.
> 
> What should the range for a 27C256 show? 7FFF?
> 
> Mike
> 
> -----Original Message-----
> From: Bill Shaw <b.shaw at comcast.net>
> Sent: Feb 10, 2004 6:33 PM
> To: diy_efi at diy-efi.org
> Subject: [Diy_efi] Re: Problem Reading '730 BINs...
> 
> Hey Mike,
> 
> Yes,  it seems list traffic is WAY down from when I was here last also.
> 
> It could be a bad bit in the eprom.  Are there more errors than just this
> one? Did you try multiple times and get the same result each time?  Do you
> know which is correct,  $40 or $80?  Any way you can run a checksum on the
> bin to see which is correct?
> 
> If you can figure out which is correct you could just patch the buffer and
> burn it into a new eprom.
> 
> hth,
> 
> Bill
> 
> > From: Mike Frels <mfrels at ix.netcom.com>
> > 
> > I posted this to GMECM last night but got no replies. As a matter of fact I
> > have seen no list activity at all since re-joining it a while back. So I
> > thought I'd try here as well for some help with my project. BTW my project is
> > changing from MAF to MAP sensor system on my '86 Camaro. The question regards
> > reading the bin file from what I believe is a 27C256 chip in a 1991 Camaro OEM
> > eprom.
> > 
> > Any help would be appreciated...
> > 
> > Mike
> > 
> > -----Forwarded Message-----
> > From: Mike Frels <mfrels at ix.netcom.com>
> > Sent: Feb 10, 2004 7:25 AM
> > To: gmecm at diy-efi.org
> > Subject: Fw: [3] Problem Reading '730 BINs...
> > 
> > 
> > Just when I was getting a smug grin making real progress on the first stage of
> > my 165-730 swap and ready to plug everything in this coming weekend to give it
> > a test something slaps me back to humility. I can't read the bin from the
> > prom. I am using the same PB10 I always used in the past hooked to the same
> > computer that I had when I made my last read/edits. I have verified
> > functionality by reading one of my '165 proms with success. They load and pass
> > the Compare with Buffer. When I load the '730 eproms I have(to turn off VATS)
> > they read in successfully but flunk the Compare. Both Device and Buffer
> > Address are 117E. The Device Data and Buffer Data are different though with C0
> > and 40 respectively. I have tried every different brand that lists 27C256 for
> > my Selected Device but no luck. Is it me doing something obviously wrong?
> > 
> > Mike
> > 
> 
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