PDP-11 tape question

Chuck Guzis cclist at sydex.com
Wed Jun 24 16:12:32 CDT 2020

On 6/24/20 1:23 PM, Jon Elson via cctalk wrote:

> The 1052 Selectric console on the 360's were not on a channel, but
> driven via direct I/O directly from the CPU microcode.  (Yes, the
> console has a pseudo channel address that made you THINK it was on a
> channel, but it actually wasn't.)

One prank to pull on an operator was to write a CCW chain to ring the
1052 bell and then to a TIC back to the bell ring CCW.

At least on DOS/360, pretty much impossible to kill without doing an
IPL, as the keyboard would be locked.

Fun from my younger days.


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