🚀 go-pugleaf

In the AMI BIOS SETUP PROGRAM - ADVANCED CHIPSET SETUP, please explain what 
these configurable parameters are supposed to do on my 486DX/33MHz system:

								CURRENT
PARAMETER			OPTIONS				SETTING
------------------------------------------------------------------------

DMA Address/Data Hold Time	1-2T, 2-3T			1-2T

AT BUS Clock Select		CPUCLK/2, 3, 4, 5, 6, 8		CPUCLK/4

I/O Recovery Time Delay		2, 4, 8, 12BCLK			4BCLK

Cache Read Hit Burst		2-1-1-1, 3-1-1-1, 		3-2-2-2
				3-2-2-2

------------------------------------------------------------------------

I have figured out most of the other CMOS settings, but these are still
somewhat elusive to me.  I believe that AT BUS Clock Select affects the
speed of the AT BUS by dividing the master clock frequency by the selected
parameter, eg, a 33MHz system would have a BUS speed of 11MHz with an AT
BUS Clock Select setting of CPUCLK/3.  Is it adviseable to increase the
AT BUS speed beyond the standard 8MHz?  Any advice, anecdotes and other
pertinent information would be greatly appreciated.

As a final query, is it adviseable to enable memory remapping if my system
has more than 1Mb of RAM?  I have 4Mb.  My crappy manual says "no", but does
not explain why.  I have enabled it and acquired an additional 256kb of
extended memory.  I assume that the other 128kb (384k-256k=128k) is in use
as shadow ROM which is enabled also.  I have experienced intermittent/random
crashes at times and I am wondering if these are related to memory mapping?

Thanks...Francis

--						IMI URU LIVE & LET LIVE
Francis Morley

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	FRANCIS@AC.DAL.CA			MORLEY@UG.CS.DAL.CA

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