I asked Ian Mapleson to part of his last R8000 Indigo2, and he was kind enough to accept.
Excellent find. The R8000 is a rare beast, especially a working one.
Some of the many chips that make up an R8000 assembly are cooled with some sort of copper (?) foil. It tends to peel off with age. If you want to keep yours going, better check it's still firmly connected, and use some thermal glue to correct if necessary. IIRC the R8000 is also very sensitive to ESD so take precautions.
robespierre wrote:The Indigo2 cases are all exactly the same pattern, only the color of the plastic is different. Besides teal and purple, there was actually a blue color and all of the R8000 Power Indigo2s I've seen have been blue.
I think you're referring to the Challenge M or the corresponding Vault-M . I own two R8000 Power Indigo2's (and used to have a third), they are all teal green.
There used to be an IP26 PowerChallenge M too. I've never seen an R10000 PowerChallenge M, even though an IP28 IMPACT Indigo2 will work fine without the graphics board.
Some R8000 Power Indigo2's were sold in purple cases, with Extreme graphics (and matching badges). Despite the purple color, they are not IMPACT capable.
robespierre wrote:IP26 is not, however, compatible with Impact graphics (no driver was written).
Even worse. There are two (released) PROM revisions for IP26, and neither recognizes IMPACT graphics so it powers up headless. The earlier PROM revision sometimes (incorrectly) fails the CPU POST
, or it takes ages to POST. This happened to me, and considering the fragile nature of the R8000, it isn't funny. If you dig through an old copy of the developer toolbox you'll find the exact explanation. A new PROM fixed that.
I've had some good fun optimizing the ATLAS math library
for the R8000. And now I've got three IP21 boards for my deskside Power Challenge too! Vintage number crunching all the way