Sgi O2 and T2/Linux
The O2, known also as IP32, is a series of high-end graphics workstation that was manufactured by Sgi from 1997 until 2004.
The distinct small, somewhat blobby shape of the O2 is instantly recognizable as a Silicon Graphics machine.
The O2 can be equiped with 64-bit MIPS CPUs running from 175 MHz up to 400 MHz.
The combination of R1x000 speculative execution feature and lack of hardware cache coherency in IP32, causes problems that need special kernel workarounds that are not yet fully implemented.
The Sgi O2 is used for general MIPS and MIPS64 development.
/proc/cpuinfo
system type : SGI O2
machine : Unknown
processor : 0
cpu model : R10000 V2.6 FPU V0.0
BogoMIPS : 400.55
wait instruction : no
microsecond timers : yes
tlb_entries : 64
extra interrupt vector : no
hardware watchpoint : yes, count: 0, address/irw mask: []
isa : mips2 mips3 mips4
ASEs implemented :
shadow register sets : 1
kscratch registers : 0
package : 0
core : 0
VCED exceptions : not available
VCEI exceptions : not available