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HP-21 fast counter
03-25-2023, 02:17 AM
Post: #4
RE: HP-21 fast counter
I seem to recall something similar published decades ago in the PPC Journal. Something like removing the battery door (but not the battery) of an HP classic machine and tossing it on a bed. Supposedly, just the right toss would yield just the right power glitch to see strange displays, access block 3 on a 67, etc.

-J
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Messages In This Thread
HP-21 fast counter - TKuenzi - 03-24-2023, 08:43 AM
RE: HP-21 fast counter - J-F Garnier - 03-24-2023, 10:49 AM
RE: HP-21 fast counter - John Garza (3665) - 03-25-2023 02:17 AM



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