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+--- Thread: Cheap module / advice wanted (/thread-20835.html)
Cheap module / advice wanted - Siegfried - 11-12-2023 08:22 PM
In this old thread Diego Diaz explained how to build a desk power supply from an "empty" ROM module and a USB power supply. While I recently bought his excellent replacement battery pack I'd still like to build one of those.
I am not sure, however, which ROM module would be "worthless" enough to be sacrificed and nothing is sold for less than 50€ on German EBay. (I have Math, Stat, X-Functions, X-Memory, Advantage and Navigation modules.)
Advice is welcome, offers for cheap/empty/non-working ROM modules with good contacts as well.
RE: Cheap module / advice wanted - AndiGer - 11-12-2023 08:25 PM
Maybe the most "worthless" module is the 82106A memory module as it adds only 63/64 registers to a HP-41C?
Andi
RE: Cheap module / advice wanted - Siegfried - 11-13-2023 10:01 PM
(11-12-2023 08:25 PM)AndiGer Wrote: Maybe the most "worthless" module is the 82106A memory module as it adds only 63/64 registers to a HP-41C?Thanks! Found two from Canada for less than 15 EUR each.