RISComputer 3240

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robespierre
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Re: RISComputer 3240

Unread postby robespierre » Thu Sep 26, 2013 1:05 pm

The R4000 has 8K+8K L1 caches and a L2 cache controller on die. It was packaged either as a -PC with 179 pins, or a -SC with 447 pins, the extra pins being used for a 256 bit wide, dedicated L2 interface. The R3000A has a L1 cache controller, but both the cache memory and the memory write buffers are off the chip. Since the L1 cache is off the chip it can be physically much larger; some R3000 machines had 128K+128K cache. If you look at your IP7 board you will see an array of SRAMs near the processor, which hold the L1 I/D cache, parity, and tags.

The HP PA-RISC is another example of an architecture with large, off-chip L1 caches. Several machines had 4MB of L1 D-cache.
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Re: RISComputer 3240

Unread postby robespierre » Thu Sep 26, 2013 8:02 pm

Aficionados of the MIPS Corporation may enjoy the posts of Dr. John Mashey, who was one of MIPS's founders and Senior Research Scientist at SGI for several years:
http://homepages.cwi.nl/~robertl/mash/
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jan-jaap
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Re: RISComputer 3240

Unread postby jan-jaap » Fri Sep 27, 2013 12:50 am

Some more R3000 porn, then ;)

Here's an IP7. Dual 33MHz R3000 w./ R3010 math co-processor, 64+64K L1 cache and 256K L2 cache (per CPU). IIRC the CPU daughter card is called an SM2.
IP7.jpg

Zoom on daughter card. Unfortunately I took this picture before I got a decent camera so it's impossible to read the part numbers on the RAM chips. Both the L1 and L2 cache must be hiding there, though.
SM2.jpg

Not even a heat sink on the CPU!
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To accentuate the special identity of the IRIS 4D/70, Silicon Graphics' designers selected a new color palette. The machine's coating blends dark grey, raspberry and beige colors into a pleasing harmony. (IRIS 4D/70 Superworkstation Technical Report)

robespierre
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Re: RISComputer 3240

Unread postby robespierre » Fri Sep 27, 2013 4:37 pm

the bank to the left of the ASICs are TC55328J-35, making 256KB of 35ns SRAM. That could be the L2.
The bank at the top look like CY7C166A-15, making up 64KB+64KB for the L1. The remainder are ECC and tags.
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jwp
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Re: RISComputer 3240

Unread postby jwp » Mon Sep 30, 2013 11:48 pm

Any idea what this computer was originally used for? Was it in use until recently?
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yetanother**ixuser
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Re: RISComputer 3240

Unread postby yetanother**ixuser » Tue Oct 01, 2013 6:53 am

no plan

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miod
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Re: RISComputer 3240

Unread postby miod » Tue Oct 01, 2013 11:41 am

jwp wrote:Any idea what this computer was originally used for? Was it in use until recently?

It was used to serve french minitel content until about 10 years ago, and had been sitting mostly unused since then. When I got it, it would not boot multiuser due to the external disks missing. Nothing repairing /etc/fstab won't fix.
:Indigo:R3000 (alas, dead) :Indigo:R4000 x4 :Indigo2:R4400 :Indigo2IMP:R4400 x2 :Indigo2:R8000 :Indigo2IMP:R10000 :Indy:R4000PC :Indy:R4000SC :Indy:R4400SC :Indy:R4600 :Indy:R5000SC :O2:R5000 x3 :O2:RM7000 :Octane:2xR10000 :Octane:R12000 :O200:2xR12000 :O200: - :O200:2x2xR10000 :Fuel:R16000 :O3x0:4xR16000 :A350:
among more than 150 machines : Apollo, Data General, Digital, HP, IBM, MIPS before SGI, Motorola, NeXT, SGI, Solbourne, Sun...

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Re: RISComputer 3240

Unread postby miod » Tue Oct 01, 2013 11:42 am

yetanother**ixuser wrote:http://gentiane.org/~miod/machineroom/machines/mips/rc3240/index.html

Damn, busted ! :mrgreen:
:Indigo:R3000 (alas, dead) :Indigo:R4000 x4 :Indigo2:R4400 :Indigo2IMP:R4400 x2 :Indigo2:R8000 :Indigo2IMP:R10000 :Indy:R4000PC :Indy:R4000SC :Indy:R4400SC :Indy:R4600 :Indy:R5000SC :O2:R5000 x3 :O2:RM7000 :Octane:2xR10000 :Octane:R12000 :O200:2xR12000 :O200: - :O200:2x2xR10000 :Fuel:R16000 :O3x0:4xR16000 :A350:
among more than 150 machines : Apollo, Data General, Digital, HP, IBM, MIPS before SGI, Motorola, NeXT, SGI, Solbourne, Sun...

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Re: RISComputer 3240

Unread postby SPSDOD » Sun Oct 06, 2013 10:10 am

Great find Miod!
I've actually been working for a while on a History of RISC/os website. A website similar to Ryan's History of IRIX.

Would you mind if I referenced your site and the pictures of your RC3240 when I get my site up?
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miod
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Re: RISComputer 3240

Unread postby miod » Mon Oct 07, 2013 12:25 pm

SPSDOD wrote:I've actually been working for a while on a History of RISC/os website. A website similar to Ryan's History of IRIX.

Would you mind if I referenced your site and the pictures of your RC3240 when I get my site up?

Not at all. What's the point of putting things online if you forbid people to link to it?
:Indigo:R3000 (alas, dead) :Indigo:R4000 x4 :Indigo2:R4400 :Indigo2IMP:R4400 x2 :Indigo2:R8000 :Indigo2IMP:R10000 :Indy:R4000PC :Indy:R4000SC :Indy:R4400SC :Indy:R4600 :Indy:R5000SC :O2:R5000 x3 :O2:RM7000 :Octane:2xR10000 :Octane:R12000 :O200:2xR12000 :O200: - :O200:2x2xR10000 :Fuel:R16000 :O3x0:4xR16000 :A350:
among more than 150 machines : Apollo, Data General, Digital, HP, IBM, MIPS before SGI, Motorola, NeXT, SGI, Solbourne, Sun...

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miod
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Re: RISComputer 3240

Unread postby miod » Mon Oct 07, 2013 12:26 pm

bluecode wrote:Fantastic collection, Miod. Thanks for posting the pics.

So many systems to talk about, so little time... :(
:Indigo:R3000 (alas, dead) :Indigo:R4000 x4 :Indigo2:R4400 :Indigo2IMP:R4400 x2 :Indigo2:R8000 :Indigo2IMP:R10000 :Indy:R4000PC :Indy:R4000SC :Indy:R4400SC :Indy:R4600 :Indy:R5000SC :O2:R5000 x3 :O2:RM7000 :Octane:2xR10000 :Octane:R12000 :O200:2xR12000 :O200: - :O200:2x2xR10000 :Fuel:R16000 :O3x0:4xR16000 :A350:
among more than 150 machines : Apollo, Data General, Digital, HP, IBM, MIPS before SGI, Motorola, NeXT, SGI, Solbourne, Sun...


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