check sum calculator

[rr]

Dave,

There is a checksum utility on incoming. It is a small DOS app. I
think it is called CkSum.exe, or close to that. It has the start and
an option end, along with a 'put' location. Execute it w/o cmd line
parms and it will give the options.

BobR.

Dave Zug wrote:

> would cause the prom to code. 52 I think. (bad CAL)
>
> It may correct the CS,  but if the BIN that was LOADED had a bad CS, the
> software may notify you of this (GME) or maybe refuse to load it <?>
>
> If the package has an option for "mark experimental" then the checksum will
> never fail, even if the chip really does have a checksum problem. good and
> bad.
>
> Look at the FTP docs for your cal if it exists, find the location of the
> cksum and set it experimental if the package you have wont support it.
>
> you can use your hex editor to calculate the cksum in some cases.
>
> anyone got a handy program to enter start, and end byte, and chsum byte
> location and "fix" a cksum? seems simple nuff and useful mebbe?
>
> ----- Original Message -----
> From: Kevin R <KEReyn at gte.net>
> To: GM ECM mailing list <gmecm at diy-efi.org>
> Sent: Thursday, November 09, 2000 7:05 PM
> Subject: check sum calculator
>
> > In reading about the winbin updates I have what is probably a very basic
> > question.
> > If I load a stock bin and change something in winbin(old version) and then
> > burn it to run in the car, can I assume the checksum will be wrong. What
> > would this cause?
> > Also I've been playing back and forth between winbin,TC, and a couple of
> hex
> > editors. Each offers it's own +s and -s. I believe TC already calculates
> the
> > CS.  If I changed a few items in winbin(that aren't listed in TC) or with
> > and editor, then change say fuel table s or spark in TC would it correct
> the
> > CS?
> >
> > Kevin R
>

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