PC's and EFI

[John Morris]

I've seen the plans for a card which goes into a PC.  It has some
static RAM on it, and an interface cable which can plug directly into
a ROM socket.  You just download your program into the static RAM, and
the board pretends like it's a ROM to the microcontroller board.
There may also have been a similar circuit that interfaces to a
parallel port, too; I think that's probably exactly what you want?  If
you're interested, I could dig it up and tell you more.
	JMan


>X-Authentication-Warning: esl.eng.ohio-state.edu: mail set sender to owner-diy_efi using -f
>Date: Tue, 17 Mar 1998 12:11:35 -0600
>From: Joe Boucher <BoucherJC at lmtas.lmco.com>
>Organization: Lockheed Martin
>
>You guys and your software jokes!  You crack me up!  (Did any other mechanical
>types understand it?  Uh, huh.  Me neither.)
>
>Before you two get into a pissing contest to see who can piss higher up the PC
>tree, let me try to deflect the conversation a little.  How hard would it be to
>hook a laptop to a GM ecm directly to the eprom to develop the various maps and
>flags for tuning a custom engine setup?  The idea is to avoid having to pull and
>replace the prom chip for every small change.  The idea would be to feed the ecm
>with data out of the laptop until the prom maps are nailed down, then burn the
>prom from the file in the laptop.
>
>The configuration of the prom chips I have seen are 24 and 28 pins.  The parallel
>port has 25 pins or so (25, 26, whatever it takes). I'm guessing this might
>reguire a separate board if a lead for each pin of the prom is required.
>
>And I'm sure some software is required.
>
>Whatyathink?  This inquiring mechanical mind wants to know.
>
>Joe Boucher
>'70 RS/SS Camaro  '81 TBI Suburban
>
>