Microwriter MW4 help
ard at p850ug1.demon.co.uk
Thu Sep 9 13:10:30 CDT 2010
> >> I recently obtained a Microwriter with an LCD display.=20
> >> Else it may be faulty
> >> I found Tony's post from 2009 asking for a 'good' EPROM image maybe=20
> >> mine is failing in a similar way.
> Tony wrote:
> > FWIW=2C I am still stuck... I am pretty sure the Firmware EPROM in mine i=
> > corrupted=2C some 'chords' do not produce the characters I would expect=20
> My one can generate all the letters=2C numbers and punctuation marks so fin=
> gers crossed the EPROM is OK.
Excellent. If you ever do manage to read it out, I would be interested in
> OK=2C I'll try and read the EPROM. This might take me some time=2C but I am=
> keen to=20
Certainly no hurry this end. I have (literally) hundreds of projects to
be going on with...
> do it as there is very little technical stuff about the MW4 on line.
I can supply a reverse-engineered schematic of the MW4 if you want it.
Alas I don't ahve scanner, so I would have to send you it on paper..
> I might try and disassemble the code too (but I don't think IDA has a 1802 =
I have the 1820 instruction set description, etc, if you need that.
Writing a simple disassembler (i.e. one that doesn't try to make any
sense of the code it's disassembling) is a fairly easy task, even I can
manage it, and I'm no programmer.
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