Remember that Sun SIMM compatibility chart I just posted as part of my
summary yesterday? Well, there's a typomathematical error in the 600MP
section (the last 2 lines).
Hans van Staveren <sater@cs.vu.nl> pointed out, and simple arithmetic
confirms, (I can divide by 4, really I can!) that in order to get 128
Megs on the 600MP main board, using 4M SIMMs, it would need 32 slots,
not 64. Likewise, the 164A expansion board would need 64 slots, not
128, to hold a maximum of 256 Megs of expansion memory. See corrected
chart below.
[I got the max. memory right, but the number of slots wrong]
Hans also reports that "reliable sources have it that they [the 600MP
and its expansion boards] can take 16Mx9 SIMMS too" though he has no
first-hand proof of this.
Interesting, though, if true. 2.5 Gig of RAM, anyone? [In case you're
wondering about THAT figure, the 600MP can use two 164A memory expansion
cards. If you populate the 64 memory slots of a 164A with 16Meg SIMMs,
you get 1 gigabyte per 164A board, and half a gigabyte more on the main
600MP board. For those REALLY memory-intensive applications!]
----------------------------+---------+-----------------------------+---------+
| 1 MB | 4 MB | 16MB |
---+-------+--------+-------+---------+---------+---------+---------+---------+
S t| | Memory | | 100ns | 80ns | 100ns | 100ns | 80ns ? |
y y| Total | in base| Max. | 1Mx9 | 4Mx9 | 4Mx9 | 1Mx33 | 4Mx33 |
s p| memory| config | Memory| | | 501-1625| | |
e| slots | (MB) | (MB) | 501-1679| 501-1739| 501-1812| 501-1698| 501-1822|
---+-------+--------+-------+---------+---------+---------+---------+---------+
600| 32 | 64 | 128 | | X | X | | |
---+-------+--------+-------+---------+---------+---------+---------+---------+
164| 64 | 64 | 256 | | X | X | | |
---+-------+--------+-------+---------+---------+---------+---------+---------+
notes: "600" = "SS 600 MP",
"164" = "164A ECC Memory expansion board"
Oh, two other trivial corrections. I mistyped "ELX" for "ELC" in the second
paragraph, and answer 2a talks about "4Mx36" SIMMs, when I said I was going
to consistently use "4Mx33" throughout. So shoot me.
Unless there are any other corrections, I'll shut up now. :-)
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Michael Maciolek mikem@juliet.ll.mit.edu (617) 981-3174
Network Engineer --- MIT Lincoln Laboratory Group 43 --- Weather Sensing
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"Operator? Get me the number for 911!" - Homer Simpson
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