[COFF] machine code translation,as mental architecture models

[John Levine]

According to Dave Horsfall <dave at horsfall.org>:
>I am reminded of the time when overlapped seeks on the RK-11 were 
>implemented in Unix, per the Peripherals Handbook.
>
>They didn't work.

Yup, I recall looking at the disk drivers which had a comment saying
that overlapped seeks on RK disks didn't work.

At Yale our PDP-11 had a pair of 2314-style RP drives. Its controller
did work and I stayed up all night one weekend debugging a driver that
queued and sorted requests for the two drives separately and did
separate seeks. It made a lot of difference, something like 30% more
transfers/minute.

-- 
Regards,
John Levine, johnl at taugh.com, Primary Perpetrator of "The Internet for Dummies",
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