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
