DECtape ancestry (Kyle Owen)

Lars Brinkhoff lars at
Sun Mar 21 13:10:45 CDT 2021

Michael Thompson wrote:
> Kyle Owen wrote:
>> 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.

MIT's MACDMP (and by extension, ITS) does this too.  I think some DEC
format as well, right?

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