Editing COMMAND.COM (section)

==References==
{{Reflist|1|refs=
<ref name="Microsoft_COMMAND">{{Cite web|url=https://github.com/microsoft/MS-DOS/blob/master/v2.0/source/COMMAND.ASM|title=MS-DOS/COMMAND.ASM at master · microsoft/MS-DOS|website=GitHub}}</ref>
<ref name="Paul_1997_BATTIPS">{{cite book |title=BATTIPs — Tips & Tricks zur Programmierung von Batchjobs |at=Kapitel 7: ERRORLEVEL abfragen |publisher=MPDOSTIP |author-first=Matthias R. |author-last=Paul |date=1997-05-01 |orig-year=1993-10-01 |language=de |url=http://www.antonis.de/dos/batchtut/battips/index.htm#7 |access-date=2017-08-23 |url-status=live |archive-url=https://web.archive.org/web/20170823191411/http://www.antonis.de/dos/batchtut/battips/index.htm |archive-date=2017-08-23}} (NB. BATTIPS.TXT is part of MPDOSTIP.ZIP. The provided link points to an HTML-converted older version of the BATTIPS.TXT file.) [https://web.archive.org/web/20190601152204/https://www.sac.sk/download/text/mpdostip.zip<!-- A yet older version 155 from 1997-05-13 of the 1997-07-15 distribution archive. -->]</ref>
<ref name="Paul_2003_Exitcodes">{{cite web |title=Exitcodes (errorlevels) of DOS utilities |author-first=Matthias R. |author-last=Paul |editor-first=Eric |editor-last=Auer |date=2003 |orig-year=1997 |url=https://www.auersoft.eu/soft/by-others/dos-exitcodes-en.html |access-date=2017-09-11 |url-status=dead |archive-url=https://archive.today/20170911103337/https://www.auersoft.eu/soft/by-others/dos-exitcodes-en.html |archive-date=11 September 2017 }} [https://www.auersoft.eu/soft/by-others/dos-exitcodes-de.html<!-- https://archive.today/20170911103522/https://www.auersoft.eu/soft/by-others/dos-exitcodes-de.html -->]</ref>
<ref name="Allen_2005">{{cite web |author-first1=William |author-last1=Allen |author-first2=Linda |author-last2=Allen |title=Windows 95/98/ME ERRORLEVELs |url=http://www.allenware.com/mcsw/errorlevels.zip |url-status=dead |archive-url=https://web.archive.org/web/20051029140802/http://www.allenware.com/mcsw/errorlevels.zip |archive-date=2005-10-29}}</ref>
<ref name="FD_2003_Errorlevel">{{cite web |title=MS-DOS errorlevels |author-first1=Eric |author-last1=Auer |author-first2=Matthias R. |author-last2=Paul |author-first3=Jim |author-last3=Hall |author-link3=Jim Hall (computer programmer) |date=2015-12-24 |orig-year=2003-12-31 |url=http://www.freedos.org/technotes/technote/207.html |url-status=dead |archive-url=https://web.archive.org/web/20151224202118/http://www.freedos.org/technotes/technote/207.html |archive-date=2015-12-24}}</ref>
<ref name="Caldera_1998_USER">{{cite book |title=Caldera DR-DOS 7.02 User Guide |publisher=[[Caldera, Inc.]] |date=1998 |orig-year=1993, 1997 |url=http://www.drdos.net/documentation/usergeng/uglontoc.htm |access-date=2013-08-10 |url-status=dead |archive-url=https://web.archive.org/web/20161104235434/http://www.drdos.net/documentation/usergeng/uglontoc.htm |archive-date=2016-11-04}}</ref>
<ref name="Caldera_1998_USER_CH7">{{cite book |title=Caldera DR-DOS 7.02 User Guide |publisher=[[Caldera, Inc.]] |date=1998 |orig-year=1993, 1997 |chapter=Chapter 7: Batch Processing |chapter-url=http://www.drdos.net/documentation/usergeng/07ugch7.htm |access-date=2017-09-11 |url-status=dead |archive-url=https://web.archive.org/web/20170911163945/http://www.drdos.net/documentation/usergeng/07ugch7.htm |archive-date=2017-09-11}}</ref>
<ref name="Paul_1997_MSDOS">{{cite book |title=MSDOSTIPs — Tips für den Umgang mit MS-DOS 5.0-7 |publisher=MPDOSTIP |author-first=Matthias R. |author-last=Paul |date=1997-07-01 |orig-year=1994-01-01 |language=de |url=http://www.antonis.de/dos/dos-tuts/mpdostip/html/msdostip.htm |access-date=2013-10-25 |url-status=live |archive-url=https://web.archive.org/web/20170822214030/http://www.antonis.de/dos/dos-tuts/mpdostip/html/msdostip.htm |archive-date=2017-08-22}} (NB. MSDOSTIP.TXT is part of MPDOSTIP.ZIP, maintained up to 2001 and distributed on many sites at the time. The provided link points to a HTML-converted older version of the MSDOSTIP.TXT file.) [https://web.archive.org/web/20190601152204/https://www.sac.sk/download/text/mpdostip.zip<!-- A yet older version 155 from 1997-05-13 of the 1997-07-15 distribution archive. -->]</ref>
<ref name="4DOS_8.00_HELP">{{quote|source={{cite book |title=4DOS 8.00 online help |title-link=4DOS 8.00 |author-first1=Hardin |author-last1=Brothers |author-first2=Tom |author-last2=Rawson |author-link2=Tom Rawson |author-first3=Rex C. |author-last3=Conn |author-link3=Rex C. Conn |author-first4=Matthias R. |author-last4=Paul |author-first5=Charles E. |author-last5=Dye |author-first6=Luchezar I. |author-last6=Georgiev |date=2002-02-27}} |text=[...] Multiple Commands: You can type several commands on the same command line, separated by a caret [^]. For example, if you know you want to copy all of your .TXT files to drive A: and then run CHKDSK to be sure that drive A's file structure is in good shape, you could enter the following command: {{code|C:\>COPY *.TXT A: ^ CHKDSK A:|doscon}} You may put as many commands on the command line as you wish, as long as the total length of the command line does not exceed 511 characters. You can use multiple commands in aliases and batch files as well as at the command line. If you don't like using the default command separator, you can pick another character using the {{code|SETDOS /C}} command or the CommandSep directive in [[4DOS.INI]]. [...] {{code|SETDOS /C:}} (Compound character) This option sets the character used for separating multiple commands on the same line. The default is the caret [^]. You cannot use any of the redirection characters [<>{{!}}], or the blank, tab, comma, or equal sign as the command separator. The command separator is saved by SETLOCAL and restored by ENDLOCAL. This example changes the separator to a tilde [~]: {{code|C:\>SETDOS /C~|doscon}} (You can specify either the character itself, or its ASCII code as a decimal number, or a hexadecimal number preceded by 0x.) [...] CommandSep = c (^): This is the character used to separate multiple commands on the same line. [...] Special Character Compatibility: If you use two or more of our products, or if you want to share aliases and batch files with users of different products, you need to be aware of the differences in three important characters: the Command Separator [...], the Escape Character [...], and the Parameter Character [...]. The default values of each of these characters in each product is shown in the following chart: [...] Product, Separator, Escape Parameter [...] 4DOS: ^, ↑, & [...] 4OS2, 4NT, Take Command: &, ^, $ [...] (The up-arrow [↑] represents the ASCII Ctrl-X character, numeric value 24.) [...]}}</ref>
<ref name="Paul_1997_NWDOSTIP">{{cite book |title=NWDOS-TIPs — Tips & Tricks rund um Novell DOS 7, mit Blick auf undokumentierte Details, Bugs und Workarounds |publisher=MPDOSTIP |author-first=Matthias R. |author-last=Paul |date=1997-07-30 |orig-year=1994-05-01 |edition=3 |version=Release 157 |language=de |url=http://www.antonis.de/dos/dos-tuts/mpdostip/html/nwdostip.htm |access-date=2014-08-06 |url-status=dead |archive-url=https://web.archive.org/web/20161104235829/http://www.antonis.de/dos/dos-tuts/mpdostip/html/nwdostip.htm |archive-date=4 November 2016 }} (NB. The provided link points to a HTML-converted version of the {{code|NWDOSTIP.TXT}}, which is part of the {{code|MPDOSTIP.ZIP}}<!-- still named TIPS_MP.ZIP between 1991 and 1996-11 --> collection.) [https://web.archive.org/web/20190601152204/https://www.sac.sk/download/text/mpdostip.zip<!-- A yet older version 155 from 1997-05-13 of the 1997-07-15 distribution archive. -->]</ref>
<ref name="DCP_2016">{{cite web |title=Betriebssystem DCP |author-first1=Rüdiger |author-last1=Kurth |author-first2=Martin |author-last2=Groß |author-first3=Henry |author-last3=Hunger |date=2016-11-29 |orig-year=2007 |language=de |website=www.robotrontechnik.de |url=http://www.robotrontechnik.de/html/software/dcp.htm |access-date=2019-04-28 |url-status=live |archive-url=https://web.archive.org/web/20190403061152/http://www.robotrontechnik.de/html/software/dcp.htm |archive-date=2019-04-03}}</ref>
<ref name="Paul_1997_4DOSTIP">{{cite web |title=Hinweise zu JPSofts 4DOS 5.5b/c, 5.51, 5.52a und NDOS |work=MPDOSTIP |author-first=Matthias R. |author-last=Paul |date=1997-05-01 |orig-year=1995-03-01 |language=de |url=http://www.antonis.de/dos/dos-tuts/mpdostip/html/4dostip.htm |access-date=2015-05-08 |url-status=live |archive-url=https://web.archive.org/web/20161104211143/http://www.antonis.de/dos/dos-tuts/mpdostip/html/4dostip.htm |archive-date=2016-11-04}} (NB. The provided link points to a HTML-converted version of the {{code|4DOS5TIP.TXT}} file, which is part of the {{code|MPDOSTIP.ZIP}}<!-- still named TIPS_MP.ZIP between 1991 and 1996-11 --> collection.) [https://web.archive.org/web/20190601152204/https://www.sac.sk/download/text/mpdostip.zip<!-- A yet older version 155 from 1997-05-13 of the 1997-07-15 distribution archive. -->]</ref>
<ref name="Schulman_1994_Undocumented-DOS">{{cite book |author-first1=Andrew |author-last1=Schulman |author-first2=Ralf D. |author-last2=Brown |author-link2=Ralf D. Brown |author-first3=David |author-last3=Maxey |author-first4=Raymond J. |author-last4=Michels |author-first5=Jim |author-last5=Kyle |title=Undocumented DOS: A programmer's guide to reserved MS-DOS functions and data structures - expanded to include MS-DOS 6, Novell DOS and Windows 3.1 |publisher=[[Addison Wesley]] |edition=2 |date=1994 |orig-year=November 1993<!-- first printing --> |isbn=0-201-63287-X |location=Reading, Massachusetts, US |pages=623, 626 |url-access=registration |url=https://archive.org/details/undocumenteddosp00andr_0}} (xviii+856+vi pages, 3.5"-floppy) Errata: [https://web.archive.org/web/20190417215556/http://www.cs.cmu.edu/afs/cs/user/ralf/pub/books/UndocumentedDOS/errata.ud2] [https://web.archive.org/web/20190417212906/https://www.pcjs.org/pubs/pc/programming/Undocumented_DOS/#errata-2nd-edition]</ref>
}}