OpenBSD/pmax used to run on a large set of the Digital MIPS-based DECstation and
DECserver family. These machines were the counterpart of the VAX-based VAXstations,
until the Alpha line was ready.
The OpenBSD/pmax port was discontinued after the 2.7 release.
History:
The pmax port of OpenBSD was started by Thomas Graichen shortly before the
OpenBSD 2.0 release, based on the NetBSD/pmax sources. It was then slowly
brought in shape, becoming self-hosted, and moving to ECOFF, then ELF
binaries.
A few releases later, Thomas Graichen stopped working on this port, and
nobody stepped in. The port was slowly left in oblivion, with no new code and
hardly any bugfixes, although releases were still being made.
A timid effort was made after the 2.7 release to revive the port, but
MIPS-specific toolchain problems prevented the system from building itself for a
long time, and development went on hiatus again. When the problem was finally
fixed, it was decided however to stop supporting it and remove the code from the
tree.
Supported hardware:
Supported models
DECstation 2100 (PMIN) and 3100 (PMAX)
DECstation 5000/120, 5000/125 and 5000/133 (3MIN)
DECstation 5000/200 (3MAX)
DECstation 5000/240 (3MAXPLUS)
Personal DECstation 5000/20, 5000/25, 5000/33 and 5000/50
(MAXINE)
Supported peripherals
Frame buffers
On-board PM monochrome (1024x864x1) or 8-bit color (1024x864x8) on PMIN
and PMAX
On-board PMAG-DV (1024x864x8) on Personal DECstation
TURBOchannel PMAG-AA (mfb) (1280x1024x1)
TURBOchannel PMAG-BA (cfb) (1024x864x8)
TURBOchannel PMAGB-BA (sfb) (1280x1024x8)
XFree86 works on all supported frame buffers.
Ethernet
On-board Lance ethernet
TURBOchannel PMAD-AA or PMAD-AB Lance ethernet
SCSI Controllers
On-board SCSI Controller (sii) on PMIN and PMAX
On-board SCSI Controller (asc) on other models
TURBOchannel PMAZ-AB SCSI Controller (asc)
Miscellaneous devices
DEC LK-201 or compatible keyboard
DEC VSXXX or compatible mouse
On-board serial ports on most models
Getting and installing OpenBSD/pmax:
The last supported OpenBSD/pmax release was
OpenBSD 2.7.
It is not available on ftp sites anymore, but releases up to 2.3 were
available on CD.