30 Dec
2000
30 Dec
'00
1:58 a.m.
On Dec 30, 10:18, Jerome Fine wrote:
I have followed this thread, but I am still not sure
what a VT78 does.
Is it similar to a VT103 for a PDP-11?
Well, "yes" and "no". It's basically a VT52 with extras which
make it a
sort of PDP-8, in the same sense that a VT103 is a VT100 with extras that
make it a sort of PDP-11. However, there's no backplane, so you can't
change the mix of boards (to use a different CPU, SLU, disk controller,
etc); the layout is fixed and based around a Harris 6100 chip (roughly a
PDP-8E on a chip, with some restrictions -- but I'm not a PDP-8 expert).
It uses RX01 or RX02 floppies in a separate cabinet and runs OS/278 which
is a modified version of OS/8 version 3 (I think?). I believe it's capable
of running some other PDP-8 OS's too -- but I'm getting beyond my knowledge
about there.
--
Pete Peter Turnbull
Network Manager
Dept. of Computer Science
University of York