[SunHELP] 32 or 64 bit?????

[Dale Ghent]

On Wed, 28 Mar 2001, Albertson, Chris wrote:

| 
| isainfo only tells you about the hardware.  Given an Ultra 5
| either a 64 or 32 bit kernel could be installed.  I've run
| 32 OSes on Ultra before.

No. isainfo tells you what the currenly running kernel supports.

If you do a 'isainfo -b', and it says 64, then you're running a 64bit
kernel. Obviously, you cannot run a 64bit kernel on 32bit-only hardware.

UltraSPARC-based machines can run either 32 or 64. The default is to boot
the 64bit kernel (except on Ultra-1 machines). However, UltraSPARC
machines can be made to boot a 32bit kernel by default by setting a PROM
variable.

/dale