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Date:	Wed, 16 Jan 2002 00:43:51 PST7
From:	"Steven Levine" <steve53@earthlink.net >
Reply-To:	scoug-help@scoug.com
To:	scoug-help@scoug.com
Subject:	SCOUG-Help: Re: MAX HeadRAM

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In <3C4514E2.53FC@peterskye.com>, on 01/15/02
at 09:52 PM, Peter Skye said:

>This is true for some older chipsets (and maybe some stupid new ones,
>too). With those, memory above 256 MB used a slower hardware access
>cycle *and* sometimes it wasn't cached, either.

This pretty much stopped in the middle of the 486 era, possibly before.

>I'm not familiar with the "Heavy Iron" memory slowdown effect which Ron
>Higgin discussed but on a /360 model 50 with a memory configuration that
>was large for the time your programs could run three to four times
>*slower* when the extra memory was plugged in. The reason was pretty
>darn simple but the bottom line was "yes, more memory meant you ran
>slower".

I've run stuff on a 360/50 with 256KB, which was quite a step up from the
360/30 with 64MB, at the time. I don't recall seeing this, but then
again, I only used it casually. What caused it? I don't even recall what
the max memory was for that box. 1MB maybe?

I do recall being able to run dozens of programs under MFT rather than the
3 allowed by DOS certainly offered to opportunity for more contention.

Steven

--
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"Steven Levine" MR2/ICE 2.30a #10183 Warp4/FP15
www.scoug.com irc.webbnet.org #scoug (Wed 7pm PST)
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