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- From: tdbear@dvorak.amd.com (Thomas D. Barrett)
- Subject: Re: Any 486 motherboards that use 36-bit memory modules ?
- Message-ID: <1993Jan22.172648.14579@dvorak.amd.com>
- Organization: Advanced Micro Devices, Inc.; Austin, Texas
- References: <C18y4y.6rx@inews.Intel.COM>
- Distribution: usa
- Date: Fri, 22 Jan 93 17:26:48 GMT
- Lines: 31
-
- In article <C18y4y.6rx@inews.Intel.COM> ttung@td2cad.intel.com (Thye-Lai Tung) writes:
- >There is no interleave, but luckily, the cache system can cover up
- >the problem somewhat. Doesn't that sound stupid anyway !
-
- It depends on the memory arch and speed... 0ws page mode is quite
- possible. But, with two levels of cache (one or both being
- write-back and one being 256K or larger), the very few misses do
- indeed not make a big difference. Especially to the folks who still
- think Landmark SPEED is a good *system* benchmark.
-
- >I find
- >36-bit modules more flexible and suitable for 386DX and 486. But they are
- >not widely used in clone systems, why ?
-
- Customer demand... and I wouldn't say that 1M SIMMs are very flexible.
- Until the 1Mx4 parts became available, it was hard to explain to folks
- that they couldn't get beyond 8M in their system when other people
- with 8-slots could get 32M. There were a few companies with the x36
- arch and who had 64-bit and 128-bit memory... again, it was a hard
- sell.
-
- >Theory aside, how do 16M, one-bank machines fare in real life with real
- >applications ?
-
- It's cheaper to throw a DX2 at the problem or add 16 more MBytes.
-
- --
- |Tom Barrett (TDBear), Sr. Engineer|tom.barrett@amd.com|v:512-462-6856 |
- |AMD PCD MS-520 | 5900 E. Ben White|Austin, TX 78741 |f:512-462-5155 |
- |"No is yes, And we're all free" ---Tracy Chapman, "Why?" |
- |My views are my own and may not be the same as the company of origin |
-