Old 486 Board for ECU? Why?

[Diehl, Jeffrey]

Frederic,

Well, I wouldn't call you an oaf!  I am thinking of dabbling in this a bit
myself now.  I'm thinking of using a Linux box to talk to an array of
smaller circuits which control engine functions.  That is, my Linux software
would set a register on the #1 fuel injector control circuit to tell it how
much and when to fire.  The PC would be able to make many corrections a
second like this.  This will be complex, but it will give me the ability to
tweek almost any aspect of my car's operation.

As for your Linux installation, I would also use RedHat.  I would, however,
turn off most of the services, and modules.  Link it staticly with
everything you will need.

I would like to better understand what kind of performance problems you are
facing.  You mentioned that it will idle, but that's about it.  Are you not
able to make corrections quickly enough?

If you are trying to use 4 displays in graphics mode with svgalib, you could
try to write a middleware function which will put a dot on your 2x2
"virtual" display.  Then build from there.  This shouldn't be too bad.  

Talk to you later.

Mike Diehl,
MR-2, '87na

-----Original Message-----
From: Frederic Breitwieser [mailto:frederic at xephic.dynip.com]
Sent: May 03, 2000 5:54 PM
To: diy_efi at diy-efi.org
Subject: Re: Old 486 Board for ECU? Why?


> Yes, the PC form factor is bad.  However, it can be improved.  I can get a
> Baby AT motherboard which is about the size of my present ECU chassis.

PC 104 form facter now has pentiums and lower of course, on 4"x6"
boards.  Not bad. Not cheap either.

-- 

Frederic Breitwieser
Xephic Technology
769 Sylvan Ave #9
Bridgeport CT 06606

Tele: (203) 372-2707
 Fax: (603) 372-1147
Web: http://xephic.dynip.com/
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