HP-80 lockup trick Message #1 Posted by David Smith on 4 Feb 2002, 3:56 p.m.
While punching around on an HP80 the other day, I found a way to lock it up with a blank display.
Turn it on.
Press DATE.
Press DATE.
Press X-bar.
Nighty night.
Later machines that display 9.99999999E99 after the first DATE will not lock up.
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