[cctalk] Re: Might be antique computer parts

Speaking of high profit margins: on the 1620, there was an extra cost option called "direct seek". I don't know if involved a jumper cut or some actual circuitry (an adder, most likely). We didn't have that, and the result is that a seek from cylinder x to cylinder y was done by a full retract to cylinder 0, followed by a seek out to y. It was amusing to watch the shaking resulting from a simple "incrementing seek test" -- seek to cylinder i for i = 0 to 99. Those last few seeks would take the better part of a second.