Article View: comp.os.msdos.programmer
Article #4221XMS -> EMS without using protected mode?
From: Brian L. Kahn
Date: Thu, 10 Jan 1991 16:08
Date: Thu, 10 Jan 1991 16:08
16 lines
1449 bytes
1449 bytes
I would like to convert some XMS memory to EMS, without using protected mode. I have seen a manager called LASTBYTE that claims to do this by twiddling the chipset DMA's or something, but LASTBYTE won't run on my machine. I do have the kind of chipset they support, so I bet my hardware could do this with the right software. Unfortunately, I don't understand what is in some chipsets (NEAT, VLSI, others) that allow this operation, so I am a bit in the dark. Can anyone either explain the special features of chipsets, explain what is needed for XMS -> EMS, or point me to some software? I want to hack around with the protected mode myself, and would like to have EMS available for some of my utilities. -- B< Brian Kahn blk@security.mitre.org "may the farce be with you"
Technical Details
Message-ID:
<BLK.91Jan10110800@vanity.mitre.org>Path:
arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!thunder.mcrcim.mcgill.edu!snorkelwacker.mit.edu!bu.edu!rpi!zaphod.mps.ohio-state.edu!think.com!linus!linus!mbunix!blkReferences:
<4602@ruuinf.cs.ruu.nl> <22515@well.sf.ca.us>Show Full Headers
Complete Article Headers
Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!thunder.mcrcim.mcgill.edu!snorkelwacker.mit.edu!bu.edu!rpi!zaphod.mps.ohio-state.edu!think.com!linus!linus!mbunix!blk From: blk@mitre.org (Brian L. Kahn) Newsgroups: comp.os.msdos.programmer Subject: XMS -> EMS without using protected mode? Message-ID: <BLK.91Jan10110800@vanity.mitre.org> Date: 10 Jan 91 16:08:00 GMT References: <4602@ruuinf.cs.ruu.nl> <22515@well.sf.ca.us> Sender: usenet@linus.mitre.org Organization: The MITRE Corp. Bedford, MA Lines: 16 Nntp-Posting-Host: vanity.mitre.org In-reply-to: mccarthy@well.sf.ca.us's message of 9 Jan 91 07:36:35 GMT