This page is a work in progress. Last updated 2024-10-16.
Introduction
Some information about the Japanese Cefucom-21 computer, a clone of the Sanyo SHC-25 from Hino Electronics Co. Ltd. used for English language learning.
I also intend to upload all of this to the Internet Archive once its current issues are resolved.
Chips, Specs & Other Information
To follow…
Manual Scans
Scanned by myself as they weren’t previously available online. I have compiled them into PDF format for easy perusal.
Let’s Try Cefucom-21
Original Japanese / English Translation (PDF)
This manual was originally printed at B5 size in greyscale.
Cefucom-21 Series
Original Japanese / English Translation (PDF)
This manual mas originally printed at A4 size in colour (well, B&W with some blue accents).
Please note that, not only were the pages in my physical manual stapled together in the wrong order, but page 16 seems to be missing (or they were misnumbered). Pages in the PDF version have been rearranged.
EPROM Dumps
I have also made dumps of all 8 EPROM chips - includes reference images of the boards on which they were found.
Note: I have been in contact with someone who is working on a Cefucom emulator using these ROMs. We have come to the conclusion that the dump of EPROM 8-2 contains errors. Further dumps have revealed that the EPROM itself is failing and producing inconsistent and incomplete data. We are working on an alternative source.
Also please note that the D2332C language PROM is currently undumped, which we are working on. This archive (and this notice) will be updated as the above issues are rectified.
Video Tour
I have also released a video exploring the Cefucom-21 on my YouTube channel.
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