SGI History Part 3 is here! This episode covers from 1993 to 1996.

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Dodoid
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SGI History Part 3 is here! This episode covers from 1993 to 1996.

Unread postby Dodoid » Fri Jan 27, 2017 5:24 am



Enjoy!
:Onyx: :O2000: :Fuel: :Octane: :Octane: :Octane: :O2: :Indigo2: :Indigo2: :Indy: :Indy:

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Re: SGI History Part 3 is here! This episode covers from 1993 to 1996.

Unread postby Shiunbird » Fri Jan 27, 2017 11:12 am

I love the 3D printed logo!

"More sluggish than a Macintosh." --ouch

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Re: SGI History Part 3 is here! This episode covers from 1993 to 1996.

Unread postby foetz » Fri Jan 27, 2017 11:22 am

it's too short for covering those years properly. there's too much missing

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Re: SGI History Part 3 is here! This episode covers from 1993 to 1996.

Unread postby Dodoid » Fri Jan 27, 2017 12:15 pm

foetz wrote:it's too short for covering those years properly. there's too much missing


If you feel I should release an addendum covering things I missed, that would be considered. What in particular do you think should be included? I try to keep my videos short(-ish), but if I missed something important I would cover it. Mind, 1996 products (O2, Origins, Onyx2) are to be covered next episode.

I know the InfiniteReality was released, but I tend not to cover individual hardware components unless they are really important later on (I mention the R8000 and IMPACT because the R8000 had floating point errors in 1998 and IMPACT is repurposed for the Octane and resulted in an Indigo2 color change. WebForce was later (1996, from what I can tell).
:Onyx: :O2000: :Fuel: :Octane: :Octane: :Octane: :O2: :Indigo2: :Indigo2: :Indy: :Indy:

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Re: SGI History Part 3 is here! This episode covers from 1993 to 1996.

Unread postby vishnu » Sun Jan 29, 2017 1:09 am

Well I liked it! Maybe you could have said something about SGI founder Jim Clark bailing out at the end of 1993 for (insert multiplicity of reasons here), but that strays into board politics and your focus is technology, so never mind... :)
Project:
Temporarily lost at sea...
Plan:
World domination! Or something...

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Re: SGI History Part 3 is here! This episode covers from 1993 to 1996.

Unread postby DDT » Fri Aug 18, 2017 2:57 am

Dodoid wrote:
foetz wrote:the R8000 had floating point errors in 1998


What kind of errors ?

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Re: SGI History Part 3 is here! This episode covers from 1993 to 1996.

Unread postby Dodoid » Fri Aug 18, 2017 9:03 am

DDT wrote:
Dodoid wrote:
foetz wrote:the R8000 had floating point errors in 1998


What kind of errors ?


https://vizworld.com/2009/04/what-led-t ... chapter-3/

Though this is unfortunately not the original source (the original archive has been deleted and Wayback Machine doesn't have it), it quotes an archived email from inside an Australian university where this is discussed.

SGI has offered to upgrade Octopus from its existing 90MHz R8000 CPU
configuration to 195MHz R10000 CPU's for no cost to JCU. The R10000 is the
current generation processor used in all SGI's high end machines. SGI have
made the offer to two reasons:

o First to ensure that a rare and specific bug in floating point
calculation that has been found in some older R8000 systems does
not become an issue at JCU. I have run tests on Octopus and
it would seem that this bug is not an issue for us at JCU.

o Second to upgrade the Power Challenge so that remains at a modern
level of performance and compatibility.

All in all this is a generous offer from SGI (valued at ~$300,000) that we
should gladly accept.
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Re: SGI History Part 3 is here! This episode covers from 1993 to 1996.

Unread postby dexter1 » Sat Aug 19, 2017 6:21 am

There also is one hint in the manual page of 'mipscheck':

Code: Select all

2. The Irix 6.2 (and later) operating systems for r8000s will
        automatically patch any running program to remove the prefetch
        instructions.  This will not affect the performance on an r8000 but
        it will avoid the r8000 prefetch problem.  In rare cases, the
        kernel will not be able to avoid the problem and will request that
        the user run the binary through r8kpp to execute the repair
        permanently.
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