An old dream come true: Iris Indigo!

Jochen Kunz jkunz at
Tue Oct 30 04:06:19 CDT 2007

On Mon, 29 Oct 2007 00:34:20 +0000
Pete Turnbull <pete at> wrote:

> Perhaps you're referring to the Indigo^2, but the R4K Indigo has most 
> things in common with the R3K Indigo.
Only from the outside. The architecture of the R3k Indigo CPU board is
a slightly modified Personal IRIS 4D3x. It uses the same proprietary
memory modules as the 4D3x and it even shares the same IP12 CPU
architecture denominator. The IP20 R4k Indigo CPU board in turn is a
completely different beast. It uses the same keyboard / mouse as the
R3k Indigo as well as GFX bus, but uses ordinary PS/2 SIMM memory. It is
much closer to the IP22 (Indigo2 R4k) and IP24 (Indy) then 4D3x (IP12).
A IP20 R4k Indigo can run IRIX up to 6.5.22 just like the Indigo2 and Indy.



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