Flash swapped address line.

[TK]

Thanks for the info. I think I am just over complicating the issue. I'll
check out the Intel application note.

Terry Kelley
-----Original Message-----
From: Ward <wspoonemore at excite.com>
To: gmecm at efi332.eng.ohio-state.edu <gmecm at efi332.eng.ohio-state.edu>
Date: Sunday, June 27, 1999 1:05 PM
Subject: Re: Flash swapped address line.


>If your research the Intel ap notes on the 512 Flash chip you will find the
>recomended "twisting" of the address lines to help a "noise" problem> I
>think these were the frist large scale production of theses chips.
>
>Orignialy I bugged them out from the CPU address pins. Then I wrote a small
>application to un-twist them, after learing to down load and up load them,
>the de-solder techneque quickly fell in to diss-use.
>
>Ward
>
>Ward
>
>On Sun, 27 Jun 1999 15:16:26 -0400, Ken Kelly wrote:
>
>> Terry,
>> I just looked at my code. It Know it works. It will take the prom images
>i got
>> from the T & E chips that I removed from my PCM and convert them to a
good
>(%
>> LT1 prom image? It swaps as I indicated. I sent you a copy of my software
>to
>> try.
>>
>> Ken
>>
>> TK wrote:
>> >
>> > I don't think this is right. The swap involves A0. I haven't figured
out
>the
>> > others yet.
>> >
>> > 4FC7 winds up at 0FF6, so 1 is being subtracted in the address.
>> > Same for 4FC8 -> 0FF7
>> > Terry
>> > -----Original Message-----
>> > From: Ken Kelly <kenkelly at lucent.com>
>> > To: gmecm at efi332.eng.ohio-state.edu <gmecm at efi332.eng.ohio-state.edu>
>> > Date: Sunday, June 27, 1999 4:22 AM
>> > Subject: Re: Flash swapped address line.
>> >
>> > >Terry,
>> > > I built a function into my editor to swap them back and forth. It can
>read
>> > the
>> > >raw Eprom format or the standard format.
>> > >
>> > >I think I ended up swapping A1 and A13,  A2 and A12,  A3 and A11.
>> > >
>> > > Ken
>> > >
>> > >TK wrote:
>> > >>
>> > >> I've been working on a 95 LT1 ECM and it's clear the address lines
to
>the
>> > >> flash eproms are swapped.
>> > >>
>> > >> Any chance you know which ones? The first 2K should be FF and there
>are
>> > >> groups of non-FF bytes in there.
>> > >>
>> > >> Any information appreciated.
>> > >>
>> > >> Terry Kelley
>> > >
>
>
>
>
>
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