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From: herbie@bruce.cs.monash.OZ.AU (Andrew Herbert)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Re: i486 burst mode on Micronics MB?
Message-ID: <3658@bruce.cs.monash.OZ.AU>
Date: 8 Feb 91 00:19:16 GMT
References: <12328.27af2b88@ecs.umass.edu>
Organization: Monash Uni. Computer Science, Australia
Lines: 28

I'm uncertain about whether burst mode is used on Micronics boards, and am
not even sure whether it's relevant in a 486 system with a secondary cache -
any *informed* comment on this?

Here are some details regarding Micronics boards, anyhow:

80486-25/AT:
	8 ISA slots, 8.3 MHz bus speed
	64k/128k/256kB secondary direct-mapped cache
	16 MB maximum on-board RAM, using 1MBx9 80ns SIMMs
	Phoenix 486 BIOS, with bios shadowing in RAM
	Landmark v1.14 - 114.1 MHZ
	Power Meter v1.3 MIPS - 11.1
	Power Meter v1.3 kWhetstones - 2303

The 486-25/EISA and 486-33/EISA boards can use 4MB SIMMS for 64 MB on-board
(as well as 1 MB SIMMS for 16 MB), but then who wants to pay for 4 MB SIMMS
with 1 MB ones so much cheaper?

486-25/EISA: LM 113.8, MIPS 11.1, kW 2282
486-33/EISA: LM 145.8, MIPS 14.5, kW 3010

Note: performance figures (as with other specs) are from the Micronics
brochure, so make of them what you will (personally, I'd be inclined to
believe them)...
--
Andrew Herbert
herbie@bruce.cs.monash.edu.au