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wdc MD driver for DC IDE-HD Interface on NetBSD/dreamcast

content maintained by Kiyoshi IKEHARA
content mirrored by unixxx (
Nagoya University Amateur Radio Club, Japan


Please don't e-mail me asking how to make a hardware(e.g. bITmASTER's).
And, all information in this site may be used at your own risk.


I've written the MD part of a wdc driver for bITmASTER's DC IDE-HD interface. This is the first step to make my dreamcast a standalone workstation.

Thanks to bITmASTER, I didn't have to design an interface circuit. Izumi Tsutsui helped me to write the bus driver. And, Masaki Satake and Tatsuya Nishiwaki helped me to make the second version of IDE interface board. Thanks!

About NetBSD/dreamcast

About this driver

This driver is for bITmASTER's DC IDE-HD Interface (prerelease ver.).


For experimental ISA board rev. 0.01

For bITmASTER's DC IDE-HD Interface rev 0.1

Dmesg outputs



Tested drives


Related links


IDE Interface


I'm using a "IBM DTLA-305040" IDE drive. The "32G clip" jumper switch is enabled because our PC's BIOS fails to probe over 32GB drive.
wdc0 at dppbus0
wd0 at wdc0 channel 0 drive 0: <IBM-DTLA-305040>
wd0: drive supports 16-sector PIO transfers, LBA addressing
wd0: 32253 MB, 16383 cyl, 16 head, 63 sec, 512 bytes/sect x 66055248 sectors
wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 5(Ultra/100)

counter: (since 2001.7.9)
ikehara AT


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