9 Sep
2010
9 Sep
'10
11:10 a.m.
> I recently obtained a Microwriter with an LCD
display.=20
>=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=
s=20
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.
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 =
option!)
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.
-tony