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Vortex schematics and old holtek chips





HI Folks,
                Good to be back on this list after a long absence (what 
*was* I
thinking! ).
I own a vortex and a while back I tried fitting in 256k DRAMS and made some
good guesses at what to put in U10... Good news is my vortex is still 
working,
bad news... no increased delay time :-( Maybe I guessed wrong on U10, maybe
I need to go find me a DSP hacker. Anyway I was going through the list 
archives
and came across the info that Kim has the vortex service manual and has 
twice
tried
to get it scanned to no avail... any more news on that front?
I'd happily volunteer but living in the UK probably complicates things :-) 
I do
have broadband however so maybe we could do it this way:
1) I paypal Kim some dosh to cover postage of a copy of the manual.
2) Manual arrives, I scan it and clean things up a bit.
3) I ftp the resulting files to some suitably receptive box.. or make them
available
    on my server for Kim to download and post on the delight site for all 
to
share.

Sound good?

On another line, does anyone know of a supplier of the (sadly obsolete) 
holtek
HT8955A chip? radioshack used to sell it, it's a digital delay that really 
just
needs
a dram chip and a couple of op-amps bolting on to it to go up to 800ms and 
I
 fancy stringing about 16 of them together with feedback paths everywhere 
to
make a nasty monster noisemaker thingy .... :-)

Cheers,
           Robin.




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