Add Castle SCSI16 board.

branches: 1.17.88; 1.17.98; 1.17.104;
New driver, sec(4), for the Acorn SCSI Expansion Card. Unlike asc(4), this
driver uses the board's DMA system, uses the machine-independent WD33C93
driver, works on NetBSD/acorn26, and doesn't share a name with six other
machine-dependent SCSI drivers. Not tested on acorn32, but it seems to
work tolerably well on my A540.

branches: 1.16.20; 1.16.22;
merge ktrace-lwp.

branches: 1.15.16;
Following Matt Thomas's request, rename ata attribute to ata_hl, and
wdc_base to ata. We can now have
atabus* at ata?
in kernel config files.

Make the ATA mid-layer appears as atabus, as proposed in
http://mail-index.netbsd.org/tech-kern/2003/09/25/0006.html
This adds a device (atabus) between IDE controllers and wd or atapibus, to
have each ATA channel show up in the device tree. Later there will be atabus
devices in /dev, so that we can do IOCTL on them.
Each atabus has its own kernel thread, to handle operations that needs polling,
e.g. reset and others.

Device probing on each bus it defered to the atabus thread creation.
This allows to do the reset and basic device probes in parallel, which reduce
boot time on systems with several pciide controllers.

branches: 1.13.8; 1.13.24;
Add support for Oak and HCCS SCSI cards fitted with PowerROMs. Since this
depends on podloader support, it won't work on arm32 yet.

Remove mistaken commit of "ethsc" reference.

Move "podulebus" and "podloader" declarations up into files.podulebus.

Add a driver for the HCCS IDE interface I got at Wakefield. Like the D.T.
Software one (dtide), it doesn't generate interrupts, so we run it in polled
mode.

Correct reference to dtide.c, and don't bother with the "channel" locator to
dtide, since ata provides that anyway.

Adapt the dtide driver to the MI podulebus framework, and move it to its new
home. It still doesn't actually work, but that's a SMOP.

Quick hack of a driver for the HCCS 8-bit SCSI podule, based on the Oak driver.
Tested to the extent that it finds my disc.

Turn "oak" into an MI podulebus driver. Tested on my new A310.

Add a comment about acemidi.

Add rudimentary support for the ACE Midi-Connect card which abs gave me.
Currently it appears as a "com" port, which is less than useful, and
occasionally generates stray interrupts. "stty -f /dev/tty00 31250 raw"
does enable it to talk to a nearby MIDI device, though.

branches: 1.3.2;
MI(ish) EtherB driver using the MI SEEQ 8005 driver. Very lightly tested.

Create an MI Ether3 driver. It's derived from the arm26 driver, which uses
my MI SEEQ 8005 driver, which is based on the arm32 ea driver.

Shared arm26/arm32 version of arm26 Ether1 driver. Seems to work on both
architectures.