johnl@ima.ima.isc.com (John R. Levine) (01/05/89)
I have a 25MHz 386 box manufactured by Intel with an Intel motherboard.
It has some 1MBx9 SIMMs that I've never seen before. The individual chips
are made by Siemens, and say "HYB 511000J-10" and "8819", the chip carriers
are made by ASMD San Diego and say board number 1064A.
I know that they're 100ns chips but are they page mode, static column or what?
And since when has Siemens been shipping chips to the US?
Enlightenment would be appreciated.
--
John R. Levine, Segue Software, POB 349, Cambridge MA 02238, +1 617 492 3869
{ bbn | spdcc | decvax | harvard | yale }!ima!johnl, Levine@YALE.something
You're never too old to have a happy childhood.teg@orc.olivetti.com (01/06/89)
Siemens has been shipping alot of 1 Megabyte dynamic RAM dip chips (DRAMs)
to the US recently. SUN Microsystems has been using them instead of
their regular Toshiba's recently. For your intel motherboard to use
these with a 25MHz clock rate it probably uses a cache controller with
a few (32K, 64K, or 256K) very high speed (~20Ns) chips. The SIMMS are
most likely run in page interleave mode with 1 wait state (0 waits are
possible with 20MHz CPU clock speeds...). All of this is just speculation
based on what I have commonly seen. Many intel boards run "safe" with
extra wait states... your machine may have 2 wait states and page interleaving.
Tom Griner {decwrl, ucbvax, ...}!orc.olivetti.com!teg frames 2 /dev/fb
TEG@Bionet-20.bio.net presto.ig.com!teg flames 2 /dev/null
pqpqpqpqpqpqpqpqpqpqpqpqpqpqpqpqpqpqpqpqpqpqpqpqpqpqpqpqpqpqpqpqpqpqpqpqpqpqpq
bdbdbdbdbdbdbdbdbdbdbdbdbdbdbdbdbdbdbdbdbdbdbdbdbdbdbdbdbdbdbdbdbdbdbdbdbdbdbd