Re: Ramdisks and Increased Ram

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Article #32862

#32862

From: Glen Stone
Date: Mon, 13 Jun 1988 15:23

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Hi,

   Ron mentioned that the external Ram Disk was used with Supra
Hard Disk driver. In fact any hard disk driver works. I'm supplying
(and I'll also release to the public domain) a driver and utilities
for the ram disk for the people that don't have hard disks.

This leads me another point. Found an interesting "bug" when playing
with the DMA code that Supra released to the public domain. When
entering and exiting Supervisor mode, the system call looks to see what
mode your in and toggles you to the other mode. So be careful, if you
call the DMA routines when already in Super mode you'll be toggled out
of super mode and nothing works. That is, the call to "Supon" turns Sup. off
if Sup. is on.


Glen

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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!ncc!alberta!calgary!amc-vlsi!stone
From: stone@amc-vlsi.UUCP (Glen Stone)
Newsgroups: comp.sys.atari.st
Subject: Re: Ramdisks and Increased Ram
Summary: Clear up a point
Message-ID: <514@amc-vlsi.UUCP>
Date: 13 Jun 88 15:23:11 GMT
Organization: Alberta Microelectronic Centre, Calgary, AB.
Lines: 17