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DM42 early units vs. current?
11-27-2020, 12:39 AM
Post: #20
RE: DM42 early units vs. current?
(09-17-2020 09:07 PM)jklsadf Wrote:  David at Swissmicros rewrote the keyboard handling code for the DM 42 in July 2019 (DMCP v3.14 and newer should have the new code), and the rewritten code significantly reduces key bounces causing buttons to register twice.

Note though that early versions of the DM 42 keyboard have hardware problems which sometimes make keys not register at all (when hooked up to a scope there is no visible change), and these hardware problems can't be fixed by the keyboard scanning code.

In summary: in many cases updating the firmware can help with repeated keystrokes from key bounce, but will not improve missed keystrokes on early hardware.

I don't have any keys which fail to register any more but if I did I'd contact Michael and I'm sure he would help me out. I've bought about a thousand dollars worth of his calculators by now lol.
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Messages In This Thread
RE: DM42 early units vs. current? - Logan - 09-08-2020, 11:14 AM
RE: DM42 early units vs. current? - johanw - 09-11-2020, 01:39 AM
RE: DM42 early units vs. current? - johanw - 09-24-2020, 06:20 PM
RE: DM42 early units vs. current? - Sukiari - 11-27-2020 12:39 AM
RE: DM42 early units vs. current? - Hlib - 09-30-2021, 04:39 PM
RE: DM42 early units vs. current? - DavidM - 09-30-2021, 11:59 PM
RE: DM42 early units vs. current? - Hlib - 10-01-2021, 03:25 PM
RE: DM42 early units vs. current? - Uli - 10-01-2021, 10:33 PM



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