Will my PA-RISC Machine Run Linux?

This is the most asked question on the parisc-linux mailing list, and you should look here first for information before asking questions.

How do I figure out if my machine will run Linux?

Check out the following list and try and find your machine in it.

If your machine isn't listed, then:
a) See if it exists in the Hardware Database, if it does not, mail the mailing list
b) Try booting it with Linux, and report back to the mailing list so we can update this data.

32-Bit Machines

These all have 32-bit processors and 32-bit IO subsystems, and will only run a 32-bit Linux kernel.

First, here's a list of totally unsupported machines: E25, E45, E55, F10, G40, H20, H50, I70, T500, T600.  All these machines contain proprietary busses, and there is no available documentation for us to get them running.
 

Model	Name	Boots	Parallel	Network	SCSI	Serial	Keyboard
705, 710	Flounder and Bushmaster	?
720, 730	Cobra	Yes			Broken	Yes
725/100	Electra	?
725/50	Spectra	?
712/60, 712/80, 712/80I,  712/100	Gecko	Yes		Yes
715/33, 715/50, 715/75	Old 715s, Scorpio	Yes[*]		Yes
715/64, 715/80, 715/100	New 715s, Mirage	Yes		Yes	?
A180, A180C	Staccato	Yes		Yes	Yes	Yes	N/A
B180L	Merlin	Yes		Yes	Yes	Yes	?
B132L	Merlin	Yes		Yes	Yes	Yes	?
735/125	Outfield	Yes
C100, C110	Raven T'	?
D200, D220	UL350	?
D310, D330, D350, D370		?
J200, J210, J210XC	Skyhawk	?

[*] Note that network booting on older machines is done through rbootd, not the usual bootp/tftp mechanism.

64-bit capable machines

Right now, run a 32-bit Linux kernel on these.

C160, C160L, C180, C180XP, Raven U
C200+, C240+, Raven+
D270, D280, D370, D380, D390, R380, R390 UL 550
K260, K360, K370
K380 Mohawk
K460, KittyHawk
J282

64-bit Only Machines

The following machines will not yet run Linux because they require a 64-bit Linux kernel that doesn't yet work.  Patience!

A500
C3000, C3600 Allegro
J2240 SummitHawk
J5000 Forte
L1000-44, L2000-44 Rhapsody
N4000-36 Prelude, N4000-44