Emulate

[Christian Hack]

Just a quick note about this EPROM emulator.

It won't let you program in real time. You will be able to sit there with a laptop
and upload your new code, start the engine and see what happens.

If it doesn't work you will have to stop the engine, modify your code and reupload
the whole thing probably (only a few seconds at a decent serial port rate and a smallish
PROM - say 16k x 8)

If you try to upload to the emulator with the engine running, the emulator will disconnect
the SRAM from the emulation port and load in the new code. In the meantime the
engine computer will have crashed since it has no code to run and the engine will
stall.

Even if it was possible to only change one byte at a time, the SRAM would still have
to be disconnected for a short while, causing the engine computer crash still.

The only hope you would have is if the real time program in the engine computer
was able to reset and restart while the flywheel was still turning causing the engine
to at least stutter.

I know my engine computer was crashing due to a not very long extension cable which
brought the PROM connector outside the box. I was getting noise on the cable and the
computer was constantly crashing. It idled like s..t and I didn't even dare drive it.
Eventhough it crashed it managed to restart in time to keep the engine going (although
not very well).

BTW: a short length of the good old al foil fixed that problem no worries.

If you just want to have a quick change system though (rather than erasing and programming
EPROMS) it seems to be pretty good value.


--
Christian Hack
christianh at edmi.com.au


> 
> At 10:40 AM 16/9/98 -0500, you wrote:
> >Could these be used to emulate the prom in a 747 ecu?  I could actually
> >afford one of these!
> >
> >And the web page had what appeared to be a prom burner that wasn't too
> >badly priced.
> >
> >Joe Boucher
> >'70 RS/SS Camaro  '81 TBI Suburban
> >
> >> From: Stuart Bunning <stuart at kenelec.com.au>
> >> Date: Wed, 16 Sep 1998 14:35:59 -1000
> >> Subject: Re: Emulate
> >>
> >> I don't think so !
> >> are we talking about the samwe em-32 The EM-32 i know of is a 32k
> >eprom
> >> emulator for more info visit this
> >> site below for TCG products in Tiawan
> >>
> >> http://www.at-taiwan.com/~com00121/
> >>
> >> >>>>
> >> >>>> Anybody have a clue what a EM-32 Board is?.
> >> >>>> If you would e-mail me I'd appreciate it
> >> >>>> Bruce       nacelp at bright.net
> >> >>>>
> >> >>>>A 32 bit Evaluation Module with Electro Magnetic protection
> >> >>>>used on some F1 engines.
> >> >>>>alex
> >>
> >


--
Christian Hack
christianh at edmi.com.au
EDMI Pty Ltd
Ph : (07) 3888 3066
FAX : (07) 3888 3583