This emulation mode attempts to emulate a Luna 88K workstation. Note that these were based on Motorola 88000 processors, not 68000.
Emulated hardware:
NOT emulated yet:
OpenBSD/luna88k works as a guest OS, with either serial console or graphical framebuffer, when using root-on-nfs.
GXemul does not yet emulate the SCSI controller in the LUNA88K machine, so OpenBSD/luna88k needs to boot with root-on-nfs. Another emulated machine must then be used as the nfs root server, and the emulated LUNA88K machine must boot as a diskless client. To make matters even more complicated, the OpenBSD/luna88k 6.8 RAMDISK kernel has support for Ethernet, but it does not seem to have a driver for nfs included or at least it doesn't work in the emulator. Therefore, a separate OpenBSD ramdisk kernel, e.g. for OpenBSD/sgi, needs to be used to run the final step of the root-on-nfs installation.
Performing this setup is quite time consuming, but necessary.
Let's get started.
wget http://ftp.eu.openbsd.org/pub/OpenBSD/6.8/luna88k/base68.tgz wget http://ftp.eu.openbsd.org/pub/OpenBSD/6.8/luna88k/comp68.tgz wget http://ftp.eu.openbsd.org/pub/OpenBSD/6.8/luna88k/xbase68.tgz wget http://ftp.eu.openbsd.org/pub/OpenBSD/6.8/luna88k/xfont68.tgz wget http://ftp.eu.openbsd.org/pub/OpenBSD/6.8/luna88k/xserv68.tgz wget http://ftp.eu.openbsd.org/pub/OpenBSD/6.8/luna88k/xshare68.tgz |
gxemul -xe 3max -d nbsd_pmax.img -d base68.tgz -d comp68.tgz -d xbase68.tgz -d xfont68.tgz -d xserv68.tgz -d xshare68.tgz |
echo hostname=server >> /etc/rc.conf echo ifconfig_le0=\"inet 10.0.0.2\" >> /etc/rc.conf echo nameserver 10.0.0.254 >> /etc/resolv.conf echo 10.0.0.254 > /etc/mygate echo /tftpboot -maproot=root -alldirs 10.0.0.3 > /etc/exports echo rpcbind=YES >> /etc/rc.conf echo nfs_server=YES >> /etc/rc.conf echo mountd=YES >> /etc/rc.conf echo bootparamd=YES >> /etc/rc.conf printf "client root=10.0.0.2:/tftpboot swap=10.0.0.2:/tftpboot/swap\n" > /etc/bootparams echo "00:00:0a:10:20:30 client" > /etc/ethers echo 10.0.0.3 client > /etc/hosts cd /tftpboot tar xzf /dev/sd1c tar xzf /dev/sd2c tar xzf /dev/sd3c tar xzf /dev/sd4c tar xzf /dev/sd5c tar xzf /dev/sd6c tar zxfv var/sysmerge/etc.tgz tar zxfv var/sysmerge/xetc.tgz chmod 1777 tmp dd if=/dev/zero of=swap bs=1024 count=262144 echo inet 10.0.0.3 > /tftpboot/etc/hostname.le0 chmod 640 /tftpboot/etc/hostname.le0 echo 10.0.0.254 > /tftpboot/etc/mygate echo nameserver 10.0.0.254 > /tftpboot/etc/resolv.conf echo 127.0.0.1 client localhost > /tftpboot/etc/hosts echo 10.0.0.2:/tftpboot / nfs rw 0 0 > /tftpboot/etc/fstab echo 10.0.0.2:/tftpboot/swap none swap sw,nfsmntpt=/swap >> /tftpboot/etc/fstab halt |
http://ftp.eu.openbsd.org/pub/OpenBSD/6.8/luna88k/bsd http://ftp.eu.openbsd.org/pub/OpenBSD/6.8/luna88k/bsd.mp http://ftp.eu.openbsd.org/pub/OpenBSD/6.8/luna88k/bsd.rd
! Configuration file for running OpenBSD/luna88k diskless with ! a NetBSD/pmax machine as the nfs server. ! ! This config file is for the client. net( add_remote("localhost:12444") ! the server local_port(12445) ! the client ) machine( name("client machine") serial_nr(1) type("luna88k") subtype("luna-88k") ! use_x11(1) ! For multiprocessor experiments: ! ncpus(4) ! load("bsd.mp") ! load("bsd.rd") load("bsd") ) |
net( local_port(12444) ! the server add_remote("localhost:12445") ! the client ) machine( name("nfs server") serial_nr(2) type("dec") subtype("5000/200") disk("nbsd_pmax.img") ) |
http://ftp.eu.openbsd.org/pub/OpenBSD/6.7/sgi/bsd.rd.IP32
! Configuration file for running OpenBSD/sgi diskless with ! a NetBSD/pmax machine as the nfs server. ! ! This config file is for the client. net( add_remote("localhost:12444") ! the server local_port(12445) ! the client ) machine( name("client machine") serial_nr(1) type("sgi") subtype("o2") use_x11(1) memory(1024) load("bsd.rd.IP32") ! load("bsd.IP32") ) |
in one xterm: gxemul @config_server and then, in another xterm: gxemul @config_client_sgi
ifconfig mec0 10.0.0.3; route add default 10.0.0.254 mount -v 10.0.0.2:/tftpboot /mnt cd /mnt/dev; ./MAKEDEV all; cd /; umount /mnt halt -p |
gxemul @config_clientWhen asked about root device, enter le0.
If you want to run with the graphical framebuffer, uncomment the
use_x11(1) line in config_client first.
Unfortunately, Xorg lacks a driver for wsfb in OpenBSD/luna88k
6.8, which is needed.
You can extract the files
./usr/X11R6/lib/modules/drivers/wsfb_drv.la ./usr/X11R6/lib/modules/drivers/wsfb_drv.so
from the OpenBSD 6.7 xserver distribution file, and use them even if the rest of the OS is version 6.8. If you have extracted the files above, then start X by running startx.
You can experiment with the multiprocessor kernel (bsd.mp), with up to 4 emulated CPUs. It is not as stable as running single-processor, though. Also, the emulator itself is not multithreaded, so all CPUs are emulated using a single host processor, so a higher number of emulated CPUs means a slower total emulation speed.
Uncomment the bsd.mp file in the configuration file, and set ncpus to the number of cpus (1 through 4).
One can also experiment with the RAMDISK kernel (much easier than following the rather involved process above):
Start the emulator like this:
gxemul -e luna-88k bsd.rd (For older OpenBSD/luna88k kernels, 5.4 and below:) gxemul -e luna-88k 0x20000:0x20:bsd.rd
Add -X if you want to use the graphical framebuffer.
The following is not needed in order to experiment with booting OpenBSD, but can be interesting nonetheless: Download https://ftp.eu.openbsd.org/pub/OpenBSD/6.2/luna88k/boot and try
gxemul -v -e luna-88k 0x00700000:0x20:0x00700000:boot