Thank you, Uwe.
I found a note from 1995 that this chip was
once-programmable. Also, Fatcity once hosted a mailing
list dedicated to..
"..Purpose: Developers, engineers and users of the
Motorola MC68HC05 family of devices can talk about the
chip, how to use it, share techniques, code,
schematics, discuss tools, etc.."
So I hope it is flashable; but what are the chances of
embedded code being corrupted ? By the way, I am in
touch with other owners who have similar problems.
If anybody is interested, I will try to provide more
info, e.g. Open Firmware commands available for the
3400 PowerBook, developer's notes.
George
--- Uwe Zimmermann <[EMAIL PROTECTED]> wrote:
> Hello George,
>
> of course if should be possible to reflash a flash
> microcontroller,
> but honestly, how should the flash memory of the
> controller have been
> affected by the impact on the floor you told us
> about earlier?
>
> If the 68HC05 (whatever it does in the PowerBook) is
> the cause of the
> trouble I would start looking for de-soldering of
> any of the contact
> legs!
>
> Uwe.
>
>
> GM> Hello,
> GM> If the embedded PMU 68HC05 chip is the source of
> GM> problems (known-good internal HDD not being
> recognized
> GM> and not booting, fan turning on and off; using
> an
> GM> external powered SCSI device eliminates all
> problems),
> GM> is it possible to reflash the chip ?
> GM> This is a 3400c/180 Mhz PowerBook.
> GM> Thank you
> GM> George
>
>
>
> --
> Author: Uwe Zimmermann
> INET: [EMAIL PROTECTED]
>
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--
Author: George Mogiljansky
INET: [EMAIL PROTECTED]
Fat City Hosting, San Diego, California -- http://www.fatcity.com
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