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Welcome to the Korg Zone Trying to reach me?

Yes, I admit. I do suffer from a mild form of GAS ... But only the stuff I couldn't afford back in the 1980s :)

The Korg DSS-1 was one of these beasts that always fascinated me. Recently, I finally was able to score one of these tanks.

Suggestions, questions, acclamation, or simply curiosity about who that guy is you might want to place here:

rainer@buchty.net

To fight spam, I'm running RBL-based filtering and Greylisting, so if your ISP's mail server is blacklisted or doesn't play according to the SMTP RFC, you might encounter bounces.


Service Area Technical Information
Reading and writing disks

Luckily, the DSS-1 does not use an esoteric disk format like some other machines. No special rotation speed (like the Casio CZ-1), no mixed sector sizes (like the Ensoniqs). Just 80 tracks per 5 sectors of 1024 bytes each. This is so straightforward, that Linux users can read/write disk images out of the box:

  1. Firstly, create a dedicated DSS-1 disk device, e.g. as follows
    mknod /dev/fd0dss1 b 2 40

  2. Now configure the new device with the proper disk geometry information
    setfdprm /dev/fd0dss1 DD DS sect=5 cyl=80 ssize=1024

  3. That's all. Now you can use dd for disk transfers:
    for reading: dd if=/dev/fd0dss1 bs=1024 count=800 of=dumpfile.dd
    for writing: dd if=dumpfile.dd bs=1024 count=800 of=/dev/fd0dss1

  4. For formatting own DSS-1 disks, use superformat /dev/ds0dss1. Don't forget to configure the drive before formatting.

Glen Stegner has an awesome collection of DSS-1 sample disks for download. Unfortunately, they are in a somewhat lesser known format (CQM) requiring some ancient DOS software to read and write.

Don't go that road.

Instead, use this converter (you know how to use gcc, right?) together with this script. No need for funky stone-age software.

I might add the dd-converted library at some later stage.

Repairing and upgrades
Replacing and repairing the disk drive. While the link is for the Casio FZ-1, the DSS-1 and DSM-1 also use Shugart drives.

Tom Virostek's DSS-1 upgrade is a must-have.
Service Manual & Schematics
Click here
Documentation of ICs

The Korg DSS-1 originally uses a 8085 processor. With Tom's upgrade board, the processing hardware almost resembles a Casio FZ-1, so here's some bits and pieces about the hardware:

uPD765 (Floppy Controller)
Programming Information for the 765 and its successors

uPD72016/NEC V50 (Microprocessor)
Programming Information for the NEC V50
ROM Dumps and OS documentation
Some future day when I find a reason to hack the OS, information might pop up here.