Q40222: CTRL+INS Fails after Initial Use on Some Clones

Article: Q40222
Product(s): See article
Version(s): 2.00
Operating System(s): MS-DOS
Keyword(s): ENDUSER | buglist2.00 | mspl13_c
Last Modified: 31-OCT-1989

In the QuickC editor, the CTRL+INS key combination for the PASTE
function may fail after the first use on some clones. The major
symptom of this problem is that the CTRL+INS will PASTE once, but will
fail for all subsequent attempts. This failure will continue until the
INS key is pressed outside QuickC at the DOS command prompt.

Microsoft has confirmed this to be a problem in Version 2.00. We are
researching this problem and will post new information as it becomes
available.

The workaround is to use the corresponding PASTE function under the
Edit menu.

Note: Only the CTRL+INS combination suffers from this problem. The INS
key alone and SHIFT+INS perform as expected.

The following sequence of events will determine if your machine
suffers from this problem:

Keystrokes         Comments

 1. QC              a. Enter QuickC.

                    b. Highlight some text and choose "Cut"
                       under EDIT menu.

 2. CTRL+INS        This should work correctly the first time.

 3. CTRL+INS        This should fail (on all subsequent attempts
                    as well).

 4. ALT+F, X        Exit QuickC.

 5. QC              a. Reenter QuickC.

                    b. Highlight and Cut some text.

6. CTRL+INS        This should fail (the BIOS bit is still set).

7. ALT+F, X        Exit QuickC.

8. INS             At the DOS prompt, press the INS key.
                   (This clears the BIOS bit.)

9. QC              a. Reenter QuickC.

                   b. Highlight and Cut some text.

10. CTRL+INS        Insertion should work.

11. CTRL+INS        This should fail.

The problem occurs because the BIOS bit, which indicates that the INS
key is currently held down, is not being cleared. When this bit is
set, the BIOS does not put a character in the keyboard queue when it
sees the INS key go down (so that the INS key does not autorepeat).

THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY.

Copyright Microsoft Corporation 1986-2002.