NetBSD/arm26 experimental snapshot, 2000-04-24.

This directory contains a kernel, bootloader and partial userland for
NetBSD/arm26 as of 2000-04-24.  They are by no means fully functional, but
the system gets up as far as running user processes.  To use it:

gunzip netbsd.gz, since BBBB can't handle gzipped kernels.

Put netbsd and BBBB on a filesystem accessible to RISC OS (preferably
local).

*SetType BBBB BASIC

Reboot RISC OS, holding down keypad-* (and shift if you have Boot
configured) to get a Supervisor prompt.  This has to be a hard reset (ie
power-on or ctrl-reset).

Change to a 256-colour screen mode (eg *echo <22><15>).  The rasops drivers
are currently broken at any other depth, and don't support 16-colour modes
at all.

Run "*bbbb".  Unfortunately, I haven't built a RAM disc for this release, so
you'll need a copy of root.tgz unpacked on a nearby NFS server and an Ether1
to talk to it.  Sorry about that.

Supported hardware:

ARM2, ARM250, ARM3 CPU.
4Mb -- 8Mb RAM.
Arc keyboard, mouse, RTC.
On-board video, but no mode changing and only 8-bit mode.
Acorn AKA25 (Ether1) podule.
Maybe D.T. Software IDE.
Some detection of IOEB and Unix backplane.
Bugger-all else.


Oh, and dmesg is a small BBC BASIC program to pull out the kernel message
buffer after a reboot (preferably before starting the desktop) and save
it in dmesg/out.  If it doesn't work (but "*Memory 02090000" does), you may
need to reduce the amount of memory RISC OS allocates for the RAM disc, font
cache etc. at startup.

If you test this, please e-mail me <bjh21@cam.ac.uk> or the arm26 mailing
list <port-arm26@netbsd.org> and tell me how well it worked.  Send dmesg.out
if you can.