747 Rom Emulator / design

[Daniel N]

Please Excuse me if i sound stupid here and/or correct me if i'm wrong.

But what if your Tuning a car on a Engine dyno, and you change one of the 
settings, and the engine goes into limp mode whilst on load on the dyno? I 
dunno about you folks :) .. but i've seen quite a few aftermarket EFI 
setup's on the dyno dynamics Dyno's we got here in australia.. and i dont 
really see it being a good thing?
like i said, correct me if i'm wrong..

Also, a little on the Emulator board, isnt there a simpler way of doing it ? 
I mean, i'm not saying its bad or anything, but compared to the Kalmaker 
emulator we have here for the Holden Delcos.. it looked much smaller / 
simpler.. but then again have i missed something? Has anybody here seen the 
kalmaker setup ?


Daniel


>From: rr <RRauscher at nni.com>
>Reply-To: gmecm at diy-efi.org
>To: gmecm at diy-efi.org
>Subject: Re: 747 Rom Emulator / design
>Date: Thu, 27 Jul 2000 17:22:46 -0400
>
>
>Dual port ram is really not required. It's expensive and can be
>tough to get. Remember that the ecm's bus cycle time is almost
>a usec. Some 100 to 150 nsec SRAM can easily be updated
>within a part of the cycle.
>
>Another way to look at it is: Does it matter if the ecm goes into
>limp when your updating the ram, you can't be driving at
>the same time your punching keys on a laptop.
>
>BobR.
>
><snip>
>
>
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