31 Mar
2020
31 Mar
'20
11:01 p.m.
Are you referring to DECtape II?? That was a cassette.
I was referring to the (nearly indestructible) earlier format: simply
called DECtape or DECtape I.? It's the same media as LINCtape (a small
reel), but with a very different controller. These could store a little
over 70K (36 bit) words.
On 3/31/20 4:40 PM, Clem Cole wrote:
Dave the TA11 (DEC proprietary Phillps Cassettes) were
150 ft long.?
?I just looked in my 1976 Peripherals Handbook -- Tape capacity of
92,000 bytes (not kbytes mind you).? ?Two tapes?per TA11; one for the
OS and the other the user.? ?We had a couple at CMU on 11/20's running
RT-11 in the EE Digital lab for the RT system's course - in fact, the
famous "110v non-maskable interrupt" occurred on one of those machines
On Tue, Mar 31, 2020 at 3:14 PM Dave McGuire <mcguire at neurotica.com
<mailto:mcguire at neurotica.com>> wrote:
On 3/31/20 2:33 PM, Thomas DeBellis wrote:
32MB really was ginormous back in the day; our
labs had RT on
RK05's,
which held about 2.5MB.? Way more than a DECtape.
? When I started out, I had it on RL01s.? But I suspect you have a few
years on me. ;)? That was quite a bit of space at the time.
? ? ? ? ? ? -Dave
--
Dave McGuire, AK4HZ
New Kensington, PA