OpenBSD/sparc OSREV runs on the following classes of machines:
	- sun4  -- 4/100, 4/200, and 4/300.   (note that support
		   for the 4/400 processor is incomplete)
	- sun4c -- SS1, SS1+, SS2, IPC, ELC, IPX, and SLC
	- sun4m -- Sun Sparc Classic, LX, 4, 5, 10, 20, and 600MP.
		   Tadpole SPARCbook 3GS and 3GX
		*** See Notes Below
	- faithful clones of the above Sun systems (e.g. Integrix, Force)

OpenBSD/sparc OSREV does NOT run on these machines (yet):
	- Sun 4/400 --  Lacking support for the I/O cache, and related
			ethernet problems.
	- sun4d -- SPARCcenter 2000, SPARCserver 1000,  XDBus and
			multiprocessor support issues.
	- sun4u (Ultrasparcs) --  currently no support for 64-bit Sparc
			architecture extensions.  sun4u will have its own port.
	- clones that are significantly different from the Sun systems 
			(e.g. Solbourne)

The minimal configuration requires 4M of RAM and ~60M of disk space.
To install the entire system requires much more disk space, and to run
X or compile the system, more RAM is recommended.  (OpenBSD with 4M of
RAM feels like Solaris with 4M of RAM.) Note that until you have
around 16M of RAM, getting more RAM is more important than getting a
faster CPU.)  Installation from "ramdisk" kernels requires 8M of RAM.

Supported devices {:-include-:}:
	sun4c and sun4m SBus video: 
		cgsix, cgthree, and bwtwo frame buffers

        sun4m on-board machine specific video:
                TCX, cgfourteen (aka SX), p9100 (Tadpole 3GS, 3GX)

	sun4 video (not thoroughly tested...): 
		P4  -- on-board bwtwo, cgfour, cgsix, cgeight
                VME -- cgtwo, cgthree, cgsix 

	serial ports: 
		ttya and ttyb (can be used as console if needed),
                ttyc and ttyd (Sun 4/300 only)
		SBus magma serial port cards, including:
			4Sp, 8Sp, 12Sp, 16Sp, LC2+1Sp, 2+1Sp,
			4+1Sp, and 8+2Sp.
		SBus Serial Parallel Interface (SUNW,spif)

	ethernet: 
		on-board AMD Lance ethernet ("le0"), 
		SBus AMD Lance ethernet cards, 
		on-board Intel 82586 ethernet (ie0 on 4/100's and 4/200's), 
		VME Intel 82586 ethernet cards
		SBus SunSwift and Quad FastEthernet cards (hme, qfe)
		SBus FastEthernet cards (qec+be)
		SBus QuadEthernet cards (qec+qe)

	SCSI: 
		on-board "esp" SCSI controller (sun4c's, and the 4/300),
		SBus "esp" SCSI controller (including 3rd party compatibles), 
		Sun "SUN-3"/"si" VME SCSI controller (polled mode only, slow),
		Sun "SCSI Weird"/"sw" on-board controller (4/110 only, polled)

	VME disks:
		Xylogics 7053 VME/SMD disk controller ("xd"),
		Xylogics 450/451 VME disk controller ("xy")
		[note: VME/IPI disks are not supported]

	Miscellaneous devices:
		Sun floppy disk drive on sun4c machines.
		Sun keyboard and mouse.
		sun4c/Classic AMD audio.
		sun4m (ss4/ss5) CS4231 audio.
		Sun SBus Expansion Subsystem (SUNW,xbox)
		Tadpole microcontroller (tctrl)

Hardware the we do NOT currently support, but get many questions about:
	Multiprocessor machines (Will not boot correctly on multiple CPU sun4m)
	Audio driver for some sun4m machines (LX,ZX,ss10,ss20)
	Floppy driver for sun4m (can boot/install from ramdisk floppies though)
	Interrupt driven SCSI driver for Sun 4/100's and 4/200's
        VME mti 16-port serial card
        VME alm2 16-port serial card
        VME mcp 4-port serial card 
        VME IPI controller
        VME cgfive framebuffer
        VME cgnine framebuffer
        VME GP/GP2 Graphics Processor
        SBus cgeight framebuffers
        SBus GS framebuffer (aka cgtwelve)
        SBus GT framebuffer ("Graphics Tower")
        SBus ZX framebuffer (aka Leo)
	Tadpole onboard PCMCIA and modem

*** Note: sun4m and general sparc caveats

As of of the OpenBSD OSREV release there are still some outstanding problems
with OpenBSD on the various Sparc architectures.  The sun4m architecture,
particularly the Viking/SuperSPARC implementations, is probably the least
stable and is also lacking useful floppy/audio support.  The 600MP support is
less stable than the other sun4m machines, and there is currently no support
for the VME bus found on this machine.

The supplied GENERIC kernel is the best attempt at a configuration that
works on the widest range of machinery (sun4, sun4c, and sun4m).  
If you have problems with the OpenBSD OSREV kernel in this distribution, 
please visit the OpenBSD web page (http://www.openbsd.org) and the mailing 
lists to review the current status and check for updates and distribution
errata.

If you have Sparc hardware you can donate or make available at nominal
cost, please mention this on the lists, many things aren't being tested
or developed simply because developers usually have only a Sparcstation
at hand, not an array of systems.  Donation or mid/long term loan of
UltraSparc (sun4u) or HyperSparc (sun4m) systems would help ensure the
long-term viability of OpenBSD on Sparc based systems.

Your support in terms of documenting previously unknown problems with
OpenBSD/sparc, helping debug known problems, implementing missing pieces,
and testing OpenBSD on various architectures is actively encouraged.
The OpenBSD mailing lists, web-pages and sendbug utility are your best
tools for helping make OpenBSD/sparc a better release.