On the fly mods & checksums.

[David A. Cooley]

Don't think it needs reset...
I was running a JET 6 in 1 chip in my 93 Jimmy, BCD pushbutton switch
selected the program.  You could be flying down the road and change
programs and feel the difference... Selected Valet at 65 once... Engine
*kinda* lost power!



At 04:46 PM 2/12/99 -0600, you wrote:

>The checksome is only checked at reset as far as I can
>tell, but there's a byte that you can set to disable the check.
>
>But I think we're going to have to reset the ECM, because
>I think there are places where the code loads a value out
>of the PROM and sticks it in RAM to work with it.
>
>What does the ECM do if the 6811 is reset while it is
>running... will it be able to detect that the engine is
>running and resume fueling, etc.?
>I know there's a lot of RAM cleared at reset/startup.
>
>There are certain things that are done at start up,
>that may be reset.... e.g. start-up coolant temp
>and baro pressure... what's going to happen here?
>
>Just thinking and typing at the same time...
>~~~~~~
>Ron Gregory                 Syclone VIN #1452
>rgregory at iname.com          Garland, TX
>
>

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           David Cooley N5XMT           Internet: N5XMT at bellsouth.net
     Packet: N5XMT at KQ4LO.#INT.NC.USA.NA   T.A.P.R. Member #7068
       I am Pentium of Borg...division is futile...you will be approximated.
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