11 Jul
2000
11 Jul
'00
4:38 p.m.
William Donzelli <aw288(a)osfn.org> wrote:
Interestingly, the TU56 controller on one of the
systems is made of
System Building Blocks, not Flip-Chips. It looks like it may have been a
production build, not just a hobby or academic hack job. No one seems to
know what that is all about.
Possibly a TC01 DECtape control, as opposed to the more common
flip-chip-based TC08?
I've never seen one, but I imagine that the TC01 was originally designed
for the PDP-5, so it would have been made with System modules.
The TC01 was designed not for the TU56, or even the TU55, but for the
Type 555 DECtape transports, which used relay control rather than solid
state. So if there are TU56 transports on it, they've probably been
configured for relay control.