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

[Mike Frels]

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
> 

_______________________________________________
diy_efi mailing list
diy_efi at diy-efi.org
http://lists.diy-efi.org/mailman/listinfo/diy_efi