28 Feb
2003
28 Feb
'03
12:35 a.m.
On Thu, 27 Feb 2003, ben franchuk wrote:
Yes you can, but real PDP 8 I/O and memory over 4kw
require other
support chips. Also since the chip is CMOS speed and output drive
is limited.
The 6120 is also CMOS and look what Bob Armstrong has done with it.
DECmates run at 8MHz, not quite as fast as a PDP-8/a, but in the
ballpark. Much faster than a PDP-8/S :-)
Until you can get a data sheet on the devices it may
be wise to not get the chips. Intersel made the 6100's first I think.
They did, 1976. Also, the 6100 is used in the VT78 (one of the only
PDP-8 variants I _don't_ have), so I bought a tube too, in case I
ever get a VT78. I doubt I'll be able to find a single part for $15
shipped if go looking later, let alone 11. The 6120 goes for $50 new.
More info at
http://www.faqs.org/faqs/dec-faq/pdp8/section-6.html
-ethan