BBC Second Processor Tube ULA (was Re: What kind of IC is this)
ard at p850ug1.demon.co.uk
Wed Dec 31 18:10:48 CST 2008
Happy new year! You know, I find it a little hard to accept machines made
in 1999 as being 'classic' :-)
> > * A drop-in replacement for Acorn's TUBE ULA would be nice - I used my=20
> > last remaining spare a couple of years ago, and still have a couple of=20
> > devices with dead ones - swapping in from a working unit is a real pain.
> Hmm, shouldn't be too hard with modern programmable-logic devices.
Was the Tube ULA (or the Tube interface) fully documented anywhere?
Obviously a pinout of the ULA exists, as does a general description of
what it did. And I think the source code to the drivers on at least one
side were published somewhere (I seem to rememebr a book on the Master
512 the contains such sources). But I didn't think there was enough info
to necessarily correctly implent the ULA functions.
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