OpenBSD/landisk runs on machines related to the IO-DATA USL-5P, using a Hitachi/Renesas SH-4 CPU.
This platform comes in a variety of models: Note: The "Giga-landisk" and HDL-F machines are ARM-based (both Intel XScale & Marvell) some of which
are supported by the armish architecture.

The current port maintainers are Dale Rahn (drahn@openbsd.org) and Miod Vallat (miod@openbsd.org). Others are definitely welcome to contribute!

Table of contents

  • History of the port
  • Current status
  • Supported hardware
  • Getting and installing
  • Projects & bugs left to fix
  • Serial cable connection

  • History

    OpenBSD/landisk is the 1st OpenBSD port to a Hitachi/Renesas SH-4 based machine. It is hoped that other SH-4 based machines will show up which are interesting enough for our user and development community, but the SH-4 processor is normally used only in true embedded products. This processor architecture is the first 32-bit sucessor of a series of extremely bizarre 8 and 16 bit processors by Hitachi. It has a very strange instruction set and MMU, and developers find it quite a challenge to map their knowledge of Unix low-level ideas to the processor architecture.

    Current status

    Hardware support is mostly complete and quite stable.

    Supported hardware

    Getting and installing

    The latest supported OpenBSD/landisk release is OpenBSD 4.8. Here are the OpenBSD/landisk 4.8 installation instructions .

    Snapshots are made available from time to time, in this location as well as in a few mirrors. Here are the OpenBSD/landisk snapshot installation instructions as well.

    Projects & bugs left to fix

    Serial cable connection

    All of these machines require a special serial cable which does voltage conversion, and can hopefully be purchased along with the card. This cable normally contains a little max232 or similar chip which converts from the 3.3V signals to +/-12V. The IO-DATA cable has pins which can grip the inside of the holes. Or you can attempt to build your own using some Japanese instructions.

    The IO-DATA cable converts from a DB9 connector to a 5-pin header (3.3V Tx Rx GND NC). Note that the Rx and Tx pins on the board are swapped compared to the ARM-based machines made by IO-DATA. All the board models have a 5-pin connector (called CN7) which the cable can plug into -- except for the USL-5P which has a 4-pin header (thus requiring removal of the spare pin).

    A USL-5P is shown with a modified IO-DATA cable. In this case the cable has been shortened significantly and the DB9 connector is glued into a slot carefully cut into the plastic between the ethernet and a USB port.

    Supported platforms
    $OpenBSD: landisk.html,v 1.47 2010/12/14 20:27:20 jasper Exp $