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HP-80 lockup trick - Printable Version

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HP-80 lockup trick - David Smith - 02-04-2002

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.