1 Apr
2020
1 Apr
'20
3 a.m.
Caps-11 sounds possible. I?ve forgotten. For the small systems (11/20,
15, 05 and the numerous LSI-11s), we had all of CAPS-11, RT-11, DOS-11 and
RSX in those days on different machines for simple RT tasks. Although
once we started getting 11/40s, 45s and eventually 34s it became almost all
Unix and used dedicated micros for the RT portions.
On Tue, Mar 31, 2020 at 7:49 PM Paul Koning <paulkoning at comcast.net> wrote:
Sent from a handheld expect more typos than usual
On Mar 31, 2020, at 5:45 PM, Clem Cole <clemc
at ccc.com> wrote:
I've forgotten to be honest -- IIRC, no formatting was needed like a
traditional tape drive. But it is possible we may have had a program to
do the formatting and I've just forgotten it. I do remember that it was a
very simple, saturation scheme. We had a scope on the read electronics of
the TA11 and decoded it all. NRZ style, 8-bit bytes, no parity, fixed
blocks with a prefix and suffix - serial encoding (unlike a 7/9-track) -
which is why the capacity is so low.
Was it really RT-11? I don't remember that it had TA11 support, and given
that it's like a magtape, not block addressable, it's hard to see how it
could be the system device.
DEC had an early software package called CAPS-11. I know nothing about it
other than the name and the fact that it was there to support the TA-11.
paul
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