|First post & a question re:20b/30b|
Message #1 Posted by E.Lub_EU on 19 Sept 2011, 12:46 p.m.
I've come here after reading about the WP34S project, and, well, fell for it. That will be my first own "WP" programmable!
I am French, so not an native speaker of English, so please excuse my clumsiness and mistakes. Do not hesitate to ask for clarifications, should you need any. Professionnally, I have worked as an EE, both in maintenance and design, (currently between jobs, alas). My main experience has been with hardware, my embedded software skills are limited to 8bit assembly, C being a really foreign language...
As for HP calculators, I've never owned one, though I have used several, starting with the HP35 then 45, 91, 21, ending with the HP41CV. I loved that one.
I've been without a "real" calculator for a long time, but this is about to change!
Which brings me to my interrogations about the 20b/30b:
1. I intended to start with a 30b (will get one later) but have found an good deal for a 20b. I think that I would not mind is "inferior" keyboard, as long as it is working well (no missed keypresses, a decent durability). What do you think?
2. I have read that their internals were identical. But looking at a photo sent by Marcus van Cube (search for "WP34S and USB"), I noticed that it did not match the PCB shown in Richard Nelson's document named "Interfacing to the HP20b V3.pdf". Specifically, Marcus' calculator seems to miss the 10pins I/O connector (J8 on the 20b schematics). I would like to have it, just in case there is a development involving these resources (interface, memory, whatever). I can't find out whether this a difference between models, or early/late versions of the same machine.
Can someone shed some light on this ?
Thanks for your assistance!