Tony Duell [ard at p850ug1.demon.co.uk] wrote:
To tie into another thread, one of the photos of the
VCF-UK
that I saw (I
can't rememeber who took said picture) seemed to be of
Spectrum (?) ULA
built from simple logic chips on large plugblock breadboard.
While that's
undoubtedly a great hack, I do have to wonder why the chap
didn't solder
it up on stripboard or similar. Anyone who has the dedication and
knowledge to make a copy of the ULA is capable of learning to solder.
And the resuylt would be a lot more permanent and probably more
reliable.
At DEC I did see (but never snagged) the wire-wrapped DHV11 protoype
(filled a BA23-size chassis). It had been wire-wrapped by an external
wire-wrapping house and then the various snags were fixed up in house.
Perhaps the ULA builder was also a reverse-engineer and found it easier
to wire-wrap whilst working out the design rather than building on
stripboard? (Was the ULA design ever made public?)
Antonio