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Re: Memory Emulator (was ASBX code is AMXY)



when it comes to soldering  I'm about 11 thumbs too. but I would like to see
what's involved.
byE
Mike
Swayze
mswayze@truswood.com
kswayze@bellsouth.net
----- Original Message -----
From: "nacelp" <nacelp@bright.net>
To: <gmecm@diy-efi.org>
Sent: Friday, April 14, 2000 12:25 PM
Subject: Re: Memory Emulator (was ASBX code is AMXY)


>
>
> Eeer, well, having seen John's ecm, it is very slick, and looks at least
as
> good, as if it was of oem manufacture.  Also, I been playing with
> breadboards, soldering for a long time, and John's work is something that
I
> wouldn't even attempt.   I'm sure there are lots of guys around here that
> can deal with SMT stuff, just that for us 11+ fingered types, don't try
this
> without adult supervision <g>..
> Grumpy
>
>
> > The '730 had provisions for an extra RAM chip that makes adding NVRAM
> > in place of the EPROM easy... on the main PCB not the MEMCAL. I
> > started out with wanting to do it on the MEMCAL too, but it didn't
> > take long ohming out traces to see the board modification was much
> > easier. My ECM has only two visible external modifications; two
> > switches... one two disable NVRAM writes, the other to switch between
> > EPROM and NVRAM. On the PCB, I stood-off the NVRAM chip in the extra
> > RAM's location.... All but 6-8 pins aligned. A few wires, and it was
> > done.  Ok... maybe not that easy... but close...
> > | So, that's the theory! Now I'm off to modify my ASBX/AMXY, etc. code
> > I've been running my '730 that way for about a year now without
> > failure. The axxc bin that I have made available
> > <ftp://jsgpc.mrcday.com/pub/gmecm/axxc.S_032000> has my ALDL
> > modifications; ALDL mode 11. This modification will let you modify any
> > address with the engine running or not. I would hope that this is a
> > good starting point for other bins with similar ECM boards.
> > john gwynne


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