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Most common calculators in the forum?
05-21-2018, 04:10 PM (This post was last modified: 05-21-2018 04:20 PM by cortopar.)
Post: #341
RE: Most common calculators in the forum?
35
25 x 2
27
97
34c
41cv x 2
75c
71b x 2
11c
12c x 5
15c
42s
17bII x 4
28s
48sx
48gx
50g x 3
35s x 2
15c LE x 2
30b
30b->34s x 2
Prime
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05-22-2018, 03:12 AM
Post: #342
RE: Most common calculators in the forum?
(05-21-2018 05:40 AM)grsbanks Wrote:  
(03-03-2018 09:20 PM)brickviking Wrote:  I know HP used the 85MS as a model for their HP-10S and 10S+.

Not sure about the 10s but for the 10s+, they didn't use the fx-85MS "as a model", they used the fx-85MS itself. It's a Casio board inside the 10s+.

Casio have sold OEM boards for as long as I can remember. Even full OEM calculators with someone else's label on them.

Ah, okay. The 10s and s+ have several keys swapped around from the FX-82/85MS layout; arrow keys match the 48-family more closely; the x^3, a/b/c, square root and some other keys moved around, so there must have been some work done on the keyboard matrix at least for HP. The only other difference I can see for the 10s+ is a slightly different colour scheme. Under certain lights, I suspect that'll be harder to read the llight blue.

My only experience with the HP-10s was a bad model, as several lines of dots from the top line disappeared, otherwise I would have kept it, and it would have cost me more money to send back to the retailer for a refund.

The laugh is, I'd been prompted to buy the calculator because the listing showed 128kb of memory. Clearly most of that memory wasn't accessible for programming, and indeed the calculator isn't programmable. I have my doubts about whether the 128kb of memory figure was correct, even considering that some memory would have been set aside for statistics variables and regression calculations.

(Post 228)

Regards, BrickViking
HP-50g |Casio fx-9750G+ |Casio fx-9750GII (SH4a)
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05-22-2018, 07:36 AM
Post: #343
RE: Most common calculators in the forum?
(05-22-2018 03:12 AM)brickviking Wrote:  Ah, okay. The 10s and s+ have several keys swapped around from the FX-82/85MS layout; arrow keys match the 48-family more closely; the x^3, a/b/c, square root and some other keys moved around, so there must have been some work done on the keyboard matrix at least for HP.

They will have got Casio to make a few alterations to the ROM.

But here's one change they didn't get Casio to make (very likely an oversight):

https://www.youtube.com/watch?v=4F873-zbyM8
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05-22-2018, 09:18 AM
Post: #344
RE: Most common calculators in the forum?
(05-22-2018 07:36 AM)grsbanks Wrote:  
(05-22-2018 03:12 AM)brickviking Wrote:  Ah, okay. The 10s and s+ have several keys swapped around from the FX-82/85MS layout; arrow keys match the 48-family more closely; the x^3, a/b/c, square root and some other keys moved around, so there must have been some work done on the keyboard matrix at least for HP.

They will have got Casio to make a few alterations to the ROM.

But here's one change they didn't get Casio to make (very likely an oversight):

https://www.youtube.com/watch?v=4F873-zbyM8

Here's a weird thing. Multiple people indicate that they have that contrast setting on their calculator; either it's hidden (but is working), or it shows up and is working. My FX-82MS doesn't show that contrast setting, nor does hitting the "2" key at the right place trigger a setting for contrast. I'm not sure if they customise them by country. I couldn't exactly say what date I bought it either, just that it was several years after I'd got my 82-TL. The date code on my circuit board says 02094, the main board identifier reads GY313-1, so I'm guessing it's the first revision. Another identifier on the board: HA210314A-2.

Hardware hacking the calculator? Hm. There's four places to put more capacitors, but no capacitors in those positions nor (mostly) lands to solder them to.

At least this post should probably have been in "Not Remotely HP", due to its drift from the original subject of "most common calculator". Let's get it somewhat back on track.

Currently in NZ, the most common calculator in a kid's home will either be some variant of FX-82 such as the ES Plus, AU Plus or descendants thereof, or if they're in the last years of their schooling, it would be the 9750gII. After they finish school, you can often find their calculators on Trademe (a NZ-based auction site) for much less than the new calculator was originally bought for. I picked up my gII in just this way, as I really really didn't want to pay the new price of $154.95 (NZ dollars).

(Post 230)

Regards, BrickViking
HP-50g |Casio fx-9750G+ |Casio fx-9750GII (SH4a)
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05-24-2018, 08:41 PM (This post was last modified: 05-25-2018 03:47 PM by gcmrtin1.)
Post: #345
RE: Most common calculators in the forum?
I've owned many since the 1970s, but here's my current collection:

HP Prime
HP 50G
HP 48GX (purchased 1992)
HP 39G
HP 30b
HP 20b
HP 19BII x2 with backdoor (purchased one in 2000)
HP 18C
HP 17bII+
HP 17BII
HP 17B
HP 10b
HP 10bII+
HP 14B 50th
HP 12C (purchased 1985)
HP 12C 30th
HP 12C 25th
HP 45 (father purchased 1974)
TI Nspire CAS CX

Palmtops with Calculator Emulators
HP OmniGo 100 with 12C
HP 200LX with 19BII enhanced functionality

82240B Thermal IR Printer
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05-28-2018, 04:15 AM (This post was last modified: 06-07-2018 04:13 PM by wyatt8740.)
Post: #346
RE: Most common calculators in the forum?
28S x 1
48SX x 1
That is all. I feel like a big fat phony 'enthusiast,' but as a student I can't really afford to start buying up all of the more expensive models.
The 28S and 48SX appear to be some of the cheapest old HP calcs around, and I really like the 28S form factor in particular.
I especially can't afford to buy more calculators after my car (a Volvo 240) got crunched and I had to foot the bill to fix it (hit and run).

(I also have a TI-89 titanium and some old four-function casio from the 80s that I can't remember the model number of)

Wyatt Ward
Computer history enthusiast
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05-31-2018, 05:56 AM
Post: #347
RE: Most common calculators in the forum?
HP12C x 3 (Original 1982 + 2 x Singapore)
HP12C Platinum
HP16C
HP50g
HP30b

TI30 Galaxy
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