[BBC-Micro] Reversing the Tube ULA (destructively)
percy.p.person at gmail.com
Sat Oct 23 17:46:13 BST 2010
Has anyone a tube chip (working or not) which could be depackaged and
photomicrographed so we can conjure up a transistor-level netlist and
a simulation of it?
Sacrificing a non-working one seems like a good first step - probably
that'll be fine for this purpose. Because the Tube is a ULA, we should
only need the metal pattern, but if it's packaged in plastic we will
need to get the acid out.
Ideally someone with a spare tube chip lives near enough someone with
a suitable microscope and someone with a suitable chemistry set!
Otherwise I can mail one to Greg James in California.
Even more ideally, someone already has some high-resolution photos of
the chip, or the original artwork...
(I'm a late joiner of the visual6502.org team which publishes a 6502
transistor-level netlist and much of the chip geometry as part of the
support chips, but should be able to tackle any single-layer-metal
More information about the bbc-micro