21 Mar
2021
21 Mar
'21
11:06 a.m.
Date: Sat, 20 Mar 2021 16:21:44 -0400
From: Kyle Owen <kylevowen at gmail.com>
Subject: Re: DECtape ancestry
What systems took advantage of the bidirectional nature?
Kyle
ADSS on the PDP-9 does an interleave of 6 when reading/writing to the
DECtape. If it runs off the end it reverses direction and keeps going. I
have seen some library files take three passes of the DECtape to fully
search.
--
Michael Thompson
21 Mar
21 Mar
11:10 a.m.
Michael Thompson wrote:
Kyle Owen wrote:
MIT's MACDMP (and by extension, ITS) does this too. I think some DEC
format as well, right?
What systems took advantage of the bidirectional
nature?
ADSS on the PDP-9 does an interleave of 6 when reading/writing to the
DECtape. If it runs off the end it reverses direction and keeps going.
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