Old 486 Board for ECU??

[Diehl, Jeffrey]

I've got a few comments on this.  

The PC powersupply supplies 5 and 12 volts.  If you were to run the PC in a
car application, you would only have to use a 12 and 5 volt regulator, not
an inverter.  And I believe that the 12 volt supply is only used by the
floppy/hard drives.

I wonder how quickly your car will "boot up" if it has to boot from
floppy...  This is a (minor?) concern.

I don't happen to believe that a Java ECU program would be fast enough to
control any engine function.   Maybe it would be able to controll the
headlights...  ;^)



-----Original Message-----
From: Axel Rietschin [mailto:Axel_Rietschin at compuserve.com]
Sent: April 30, 2000 2:45 PM
To: diy_efi at diy-efi.org
Subject: Re: Old 486 Board for ECU??


That said, there is no doubts a PC can boot without a hard disk. You can
write your own BIOS with POST and bootstrap routines that suit your needs.
Also, there is plenty of space in a typical car to fit even the largest PC
motherboard and you can always use a standard PC power supply with a
12V-to-110/220 converter in front of it. Last, a 3.5" floppy is certainly
big enough to hold the largest engine control program and huge maps, except
maybe if you are coding in Java(tm)

;-)

--Axel



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