Microsoft KB Archive/67426

= Conflict Between CTTY and Command-Line Editing Utilities =

Article ID: 67426

Article Last Modified on 11/26/2003

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APPLIES TO


 * Microsoft MS-DOS 3.1
 * Microsoft MS-DOS 3.2 Standard Edition
 * Microsoft MS-DOS 3.21 Standard Edition
 * Microsoft MS-DOS 3.3 Standard Edition
 * Microsoft MS-DOS 3.3a
 * Microsoft MS-DOS 4.0 Standard Edition
 * Microsoft MS-DOS 4.01 Standard Edition
 * Microsoft MS-DOS 5.0 Standard Edition

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This article was previously published under Q67426



SUMMARY
Command-line editors, such as MS-DOS 5.0 Doskey, may experience problems when a CTTY command is issued. Command-line editors use system BIOS calls to manipulate keyboard input and display so they can provide fast, flexible command-line editing. The CTTY command redirects MS-DOS character input and output calls, but not system BIOS calls. This can be confusing to command-line editors, producing unpredictable results.

As a result, DOSKEY and such third-party command-line editors as DOSEDIT, CED, and PCED should not be used when the CTTY command is executed.

Additional query words: 3.0 3.00 3.1 3.10 3.2 3.20 3.21 3.22 3.3 3.30 3.3a 3.30a 4.0 4.00 4.0a 4.00a 5.00 noupd

Keywords: KB67426

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