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HP-41 <> USB-41 bidirectional comms.
04-02-2014, 11:52 PM
Post: #10
RE: HP-41 <> USB-41 bidirectional comms.
Hi Thomas,

Yes for sure... a more appropriate approach would be: "Do not suppose, check it exhaustively." Though, regrettably, this is not always possible... :-)


Indeed, the missing last byte has now been found and fixed; and the main misfunction due to (so to say) timing shift, is mostly isolated in the USB interface (inside the connector).

One of the two (in theory) functionally identical models; the one that needs a Xtal, is not working as reliably as expected.

Now I'm trying to figure out if it is a method to "adjust" it by SW, or if I'll need to recall these units and replace this part for the (newer) Xtal-less.

Will keep you informed.

Thanks again for your sontinued support and best wishes.


"Do not suppose, check it twice."
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RE: HP-41 <> USB-41 bidirectional comms. - Diego Diaz - 04-02-2014 11:52 PM

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