OpenBSD/landisk

• IO-DATA USL-5P, using CF storage (Japan; as shown)
• IO-DATA HDL-U, HDL-AV, HDL-W and HDLM-U series (Japan)
• SuperTank LAN Tank (SOTO-HDLWU) (Japan)
• IO-DATA UHDL-160U and UHDL-300U (May be found in USA)
• Plextor PX-EH16L, PX-EH25L and PX-EH40L

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

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

For a complete system component and device driver listing for this architecture, see intro(4/landisk).
• HITACHI SH4 SH7751R processor at 266MHz.
• 64MB of ram.
• re(4) 100Mbit ethernet.
• wdc(4) drive controller connected to either flash or microdrive in a CF socket, on some models.
• pciide(4) IDE drive controller supporting wd(4), on some models.
• com(4) serial port console at 9600 baud (lacking hardware flow control).
• ehci(4) and ohci(4) USB controllers supporting most usb(4) devices.
• power(4) button and some LEDs.

Getting and installing

The latest supported OpenBSD/landisk release is OpenBSD 5.1. Here are the OpenBSD/landisk 5.1 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

• Squelch remaining compiler optimization bugs.

Serial cable connection

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.