Thread | Brutkey

CALEDATA.30 stores a different part of the Casio Caleid OS - the applications. It also features the very same images we've seen in our BN-20 BIOS. I'm uploading them here upscaled and colour-corrected.

The "notes" application has lots of different categories of notes: cars, cards, CDs, books, films, and so on.

(cont)

Casio Caleid splash screen, extracted from ROM. Features a megapolis photo with twin towers

Casio Caleid "See you again..." screen, extracted from ROM. Features a megapolis photo with twin towers

Images of a fax and a vintage-looking PC extracted from the Casio Caleid ROM.

A screenshot of "memos" app extracted from the Casio Caleid ROM, showing multiple note categories, from family and diary to cards, CDs, and business trips

Nina Kalinina
@nina_kali_nina@tech.lgbt

Some more built-in apps in the Caleid OS: "easy sheet" is a spreadsheet program with built-in templates (mortgage, currency converter, GOLF SCORE wtf) and the networking app (computer, electronic mail, FAX).

(cont)

A screenshot of Easy Sheet program showing different categories of spreadsheets, with cute pixel icons. The background is a photo of a paper spreadsheet and a calculator

Connections application, showing three sub-categories of connection apps, on top of a heavily dithered photograph of some skyscrapers

Nina Kalinina
@nina_kali_nina@tech.lgbt

What could be better than a calculator app? Well, of course, two calculator apps! Yes, Caleid has two built-in calculators: one is stand-alone and one is a pop-up calculator. Handy, eh?!

(cont)

A Calculator app, full-sized screenshot from Caleid ROM. Looks like a wide calculator with soft corners

A pocket-size calculator with a vertical key layout from the Caleid ROM. It has buttons to copy the results of the calculation

Nina Kalinina
@nina_kali_nina@tech.lgbt

Caleid is a "Mobile Navigator", not a "Business navigator", so it has three built-in games.

The last file in the OS, the 300 KB blob CALEDATA.40, doesn't have any non-compressed bitmaps.

Can we run the OS in the simulator? It is shipped with it, after all. Hmm... Let's try! (cont)

An image extracted from the Caleid ROM. It shows 4 aces of different suits, and text "Congratulations!"

Nina Kalinina
@nina_kali_nina@tech.lgbt

Well, actually, I can't think of a way to do so... Maybe some other time.

Anyhow, I've uploaded the Caleid OS and the SIM3020 to the Internet Archive: https://archive.org/details/caladdin/Screenshot%202026-02-01%20at%2015.16.33.png

Grab a DosBox-X with PC-98 support and try it yourself~