24 Jun
2020
24 Jun
'20
2:12 p.m.
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.
--Chuck