Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!uwm.edu!rpi!zaphod.mps.ohio-state.edu!usc!jarthur!jmerrill
From: jmerrill@jarthur.Claremont.EDU (Confusion Reigns)
Newsgroups: comp.sys.ibm.pc
Subject: Re: 386-25 motherboards - mylex vs micronics
Message-ID: <5243@jarthur.Claremont.EDU>
Date: 21 Mar 90 03:21:56 GMT
References: <1990Mar12.204511.11366@uncecs.edu> <4269@vaxwaller.UUCP>
Distribution: usa
Organization: Harvey Mudd College, Claremont, CA 91711
Lines: 28

In article <4269@vaxwaller.UUCP> richc@vaxwaller.UUCP (Rich Commins) writes:
>  I own a MI386-20 Mylex motherboard and with the cache on, the board
>  does a consistant SI=31 speed.  Sometimes the cache misses and the
>  board comes in at SI=23 but mostly runs at SI=31.  I would think that
>  a 25 MHz board should run at least 25% faster.

Strange...My MI386-20 with 64K SRAM cache comes in consistently at SI 23.
Quarterdeck's Manifest program rates my memory at:

         First Meg
              Speed  PC/XT
Memory Area   K/Sec  Index
Memory Cache   6279  12.1
0000 - 9FFF    4995   9.6  (Conventional RAM)
A000 - B7FF    1050   2.0  (VGA Graphics & Mono)
B800 - BFFF     859   1.7  (VGA Color Text)
C000 - C5FF    4978   9.6  (Shadowed Video ROM)
C600 - C7FF    2693   5.2  (Unshadowed Video ROM)
C800 - C8FF    5013   9.7  (Shadowed Disk ROM)
C900 - CAFF    1580   3.1  (Unshadowed Disk ROM)
CB00 - F3FF    4991   9.6  (High RAM and Page Frame)
F400 - F7FF    2693   5.2  (Page Frame)
F800 - FFFF    5008   9.7  (Shadowed BIOS ROM)
    HMA        5013   9.7

(Cut and Paste between windows is handy...)

Is your cache faster than mine?