IBM 1620

Paul Koning paulkoning at
Fri Aug 28 07:59:45 CDT 2015

> On Aug 28, 2015, at 1:30 AM, Chuck Guzis <cclist at> wrote:
> ...
> Well, other than the Model I (CADET) typewriter acting as if it were going to fly apart at any time, the 1311 disk drive was fun to watch.

Especially if you didn't have the "direct seek" option.  I had a one-card program that would do for (i=0; i<100; i++) seek_cylinder(i).  That doesn't step track to track as you would expect; instead, it goes from track n to 0 to n+1, resulting in progressively wilder and slower seeks as n increases.


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