CPU's

[Bob Wooten]

now i am getting paranoid.  i am not a programmer (nor am i going to
pretend to be), i fight my way around & make it happen but a lot of this is
above my head.  If there might be two of Masks for what i think my
application is (I have what i think are certain knowns, that i am making
assumptions from) , how am i going to know for certain when i plug it into
Tuner cat or WinBin that I am going to be editing the right things for what
i think is a certain value in a table?  i have plugged my bin into the
WinBin & it looks right. that is to say that the tables are what i would
expect to be reasonable & do not have any large numbers where i would not
think they ought to be.  but that is not to say that this is not the right
things.

thanks again for the help.  THIS, is why i am hanging around, soaking up as
much as i can.  this , as far as i am concerned, is what helping fellow
enthusiasts, is all about.  

BW


> [Original Message]
> From: Ludis Langens <ludis at cruzers.com>
> To: <gmecm at diy-efi.org>
> Date: 12/5/00 2:29:08 AM
> Subject: Re: CPU's
>
> Bob Wooten wrote:
> > 
> > So let me see if i have this straight.  the BCC is not in the firmware,
> > though the prom ID is.  the prom ID has the detailed information
specific
> > to the application & it can lead one to the BCC.
> 
> The scan id in the chip does not have detailed info.  If you are lucky,
> the scan id by itself is enough to figure out the matching BCC.  Usually
> you have to use the context (what mask byte, what year, what engine,
> etc.) to get from the scan id to BCC.  If you are unlucky, one
> ECM+mask+application will have duplicated scan ids.  Someone posted such
> a chip on incoming.  Its one of two possible BCCs, I don't know which.
> 
> > here is what i am not following, you said that the Mask byte (not two
bits,
> > forgot the Basic EE from school), "might not have the same table
layout".
> > so, this means that there really is not a simple rule here.  i was
thinking
> > (assuming i suppose), that this being the truth would make it rather
easy
> > to write stuff like Win Bin & Tuner Cat for that Mask byte.  it appears
> > not.
> 
> There at least two-each of masks 32, 6E, and 8D.  The changes might be
> bug fixes with unchanged table layouts, or an extra table or constant
> might have been added.  The paranoid chip editor should be checking
> either the program code or perhaps some of the table headers.
> 
> -- 
> Ludis Langens                               ludis (at) cruzers (dot) com
> Mac, Fiero, & engine controller goodies:  http://www.cruzers.com/~ludis/
> 
> 
>
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--- Bob Wooten
--- r71chevy at earthlink.net
--- 71-91 Camaro


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