Article: Q71211
Product(s): Microsoft Windows 95.x Retail Product
Version(s): WINDOWS:3.0,3.0a,3.1,3.11
Operating System(s):
Keyword(s):
Last Modified: 08-OCT-1999
-------------------------------------------------------------------------------
The information in this article applies to:
- Microsoft Windows versions 3.0, 3.0a, 3.1, 3.11
-------------------------------------------------------------------------------
SUMMARY
=======
While running an MS-DOS application in a window, Microsoft Windows may switch it
to full screen if an MS-DOS critical error occurs. Typically, the critical error
will be a disk error, but there are other causes as well.
The common critical MS-DOS errors are:
- attempting to access a floppy drive with no disk
- attempting to write a file to a write-protected floppy disk
- attempting to access an unformatted floppy disk
When an MS-DOS critical error occurs, MS-DOS is unstable until the critical error
is resolved. To maximize stability, Windows switches the application to
full-screen text mode. This is by design and there is no workaround. Press
ALT+ENTER, after the error is resolved, to switch the MS-DOS application back to
the windowed display mode.
MORE INFORMATION
================
Switching Between Full Screen and Windowed Display Modes
--------------------------------------------------------
The "windowed" display mode of MS-DOS applications is only available in 386
enhanced mode. There are three actions that can be performed to run an MS-DOS
application in a window or full screen:
1. Select the desired mode in the PIF Editor.
2. Press ALT+ENTER to toggle between the two modes.
3. Select the desired mode from the MS-DOS application's system menu:
a. Start the MS-DOS application in question.
b. Press ALT+SPACEBAR to display the system menu.
c. Select Settings (press T).
d. Select Windowed (press W).
e. Press ENTER.
MS-DOS Int 24H Critical Errors
------------------------------
The critical error handler is a function of interrupt 24H. A complete listing of
the MS-DOS Int 24H critical errors are listed below.
Error Code
Hex Dec Description
---------------------------------------------
00H 0 Write-protect error
01H 1 Unknown unit (invalid drive number)
02H 2 Drive not ready (no disk or driver door open)
03H 3 Unknown command requested
04H 4 Data error (CRC)
05H 5 Bad request structure length
06H 6 Seek error; move to requested cylinder failed
07H 7 Unknown disk format
08H 8 Sector not found
09H 9 Printer out of paper
0AH 10 Write fault
0BH 11 Read fault
0CH 12 General, nonspecific error
0FH 15 Invalid disk change (MS-DOS version 3.0 or later)
Additional query words: 3.00 3.00a 3.10 3.0 3.1 3.11 win31 win30
======================================================================
Keywords :
Technology : kbWin3xSearch kbZNotKeyword3 kbWin300 kbWin300a kbWin310 kbWin311
Version : WINDOWS:3.0,3.0a,3.1,3.11
=============================================================================