Byron A Jeff wrote:

> So Wouter has solved the problem at some point. I'm not sure if he ever
> released that code. It probably added some restrictions like A jump is
> required from address 0-3. Then force a 4 word write to the save area and
> never overwrite the actual bootloader 0-3.

Sounds like fun to me :\

>
> BTW have you tried linwload? Woj wrote it quick and dirty several years ago
> as a C based Linux equivalent to xwisp for wloader. It works. I updated it
> to be kinder to system resources when waiting. I have the code posted on my
> page http://www.finitesite.com/d3jsys

I tried it but as you speculated/observed it messes up the bootloader
then the program fails to run. I had modified it a little to accept the
fact that I was using a different firmware version just to see what it
would do, but it did nothing anyway.

>
> Maybe you can use it as another test point to see if you can load.
>
> Hope this gives you some insight.
>
> BAJ
>

Thanks for the info. I'm going to put a DB15 connector on my chassis to
plug in my Wisp628, I've wasted too much time trying to figure the
bootloader out, and I know how to solder. A bootloader would be better
if I could find a hex file versus an MPLAB project file. I'm running an
877A at 20MHz.
I use Linux exclusively and gpasm doesn't like MPLAB.

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Martin Klingensmith
http://infoarchive.net/
http://nnytech.net/

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