Selectable chips & boost programming

[Frank]

I sure would like a copy.
Thanks
Frank Pearson
repair at frontiernet.net
----- Original Message -----
From: "Keith" <kgil1 at tampabay.rr.com>
To: <gmecm at diy-efi.org>
Sent: Friday, February 25, 2000 5:47 PM
Subject: Re: Selectable chips & boost programming


> can you send it my way too. I'd like to make one also..
> Thanks
> Keith
>
> Programmer wrote:
> >
> > Hmmm...guess I'll have to do a schematic and send it your way and see if
> > I've got it right <g>...
> >
> > Thanks !!
> >
> > LW
> >
> > >Don't have anything in hardcopy, but it used a 27C128 chip stock, so I
used
> > >a 27C010, mapped all the similar address, Data, power and control lines
to
> > >a 28 pin plug so the plug looked like a 27128 to the ECM. Took the 3
> > >additional address lines and ran them to a BCD thumbwheel switch, and
the
> > >Thumbwheel switch I believe grounded the lines when they were active (I
> > >could have that backwards...) and used pull-up resistors on the lines
to
> > >the switch. I loaded a program into the burner, set the switch on the
> > >number I wanted that program to be in the chip, and burned it, loaded
the
> > >next bin, set the switch to where it was supposed to be and burned it,
etc.
> > >You could switch programs on the fly without a hiccup out of the engine
> > >(unless you were screaming and selected valet or security mode!).
Worked
> > great!
> > >
> > >
> > >===========================================================
> > >David Cooley N5XMT Internet: N5XMT at bellsouth.net
> > >Packet: N5XMT at KQ4LO.#INT.NC.USA.NA T.A.P.R. Member #7068
> > >We are Borg... Prepare to be assimilated!
> > >===========================================================
> > >
> >
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> --
> Keith Gill F.A.S.T.
> Riverview, FL
> '91 GMC Syclone #2173
> '75 Oldsmobile Hurst/Olds
> '92 Nissan Sentra SE-R
> http://www.mindspring.com/~keith455
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