On Wed, Mar 26, 2003 at 11:31:10PM +0900, Toru Nishimura wrote:
> I believe in that SGI chose a particular model of OEM reference design (VME board)
> sold by MIPS Computer system to abandon and switch away from their aging m68k
> product lines.  This means so-called SGI's "pre-ARCS" PROM was nearly identical
> to the MIPS Computer system's own product.   Early releases of IRIX were
> nothing more than UMIPS from MIPS Co. and in fact RISC/os (renamed from
> UMIPS) kept a range of system call entries marked "reserved for SGI IRIS."
> 3K SGI port should be par or identical to mipsco/ in many sense.
> 
> Memory size detection logic can be found at mipsco/machdep.c, which is known
> working on R3K system.

I haven't tried the mipsco memory testing code, but I have been able to 
successfully pull the configuration from the PIC. If the mipsco code works,
it may prove a superior, more universal solution in the somewhat unlikely 
event that even older machines become supported in the future.

-Steve

> 
> Toru Nishimura/ALKYL Technology
> 
> 
>