DOS PSP query

Article View: net.micro.pc

Article #5955

#5955

From: Jay Elvove
Date: Wed, 12 Mar 1986 13:27

17 lines
1570 bytes

A while back, some knowledgeable folk posted a relatively complete list
of DOS interrupts, which included documentation of some marked in the
DOS technical reference as "reserved".  Now I am wondering if there is
anyone out there who has discovered the use of "reserved" areas of the
program segment prefix (PSP) and also the file control block, either
or both of which may change from DOS level to level.  I've explored
cursorily inside of COMMAND.COM and notice that very early on it
peeks at information in the PSP, including some locations that are not
documented.  If anyone has explored the PSP (and FCB) in detail, I would
appreciate hearing from them via mail.  If there is general interest (and
I get a response), I will post the results.  I wouldn't dream of advocating
using this information for production work.  It's purely of intellectual
interest :-).

-- 
Jay Elvove       ..!seismo!rlgvax!cvl!umd5!jay
c/o Systems, Computer Science Center, U. of MD.

Technical Details

Message-ID: <878@umd5.UUCP>

Path:

arc1-ca.pugleaf.net!utzoo!watmath!clyde!burl!ulysses!bellcore!decvax!ittatc!dcdwest!sdcsvax!sdcrdcf!hplabs!qantel!lll-lcc!lll-crg!gymble!umcp-cs!cvl!umd5!jay

Show Full Headers

Complete Article Headers

Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.2 9/5/84; site umd5.UUCP
Path: arc1-ca.pugleaf.net!utzoo!watmath!clyde!burl!ulysses!bellcore!decvax!ittatc!dcdwest!sdcsvax!sdcrdcf!hplabs!qantel!lll-lcc!lll-crg!gymble!umcp-cs!cvl!umd5!jay
From: jay@umd5.UUCP (Jay Elvove)
Newsgroups: net.micro.pc
Subject: DOS PSP query
Message-ID: <878@umd5.UUCP>
Date: Wed, 12-Mar-86 08:27:49 EST
Article-I.D.: umd5.878
Posted: Wed Mar 12 08:27:49 1986
Date-Received: Sun, 16-Mar-86 00:33:46 EST
Distribution: net
Organization: U of Md, CSC, College Park, Md
Lines: 17