Microsoft DOS EMM386 command
Quick links
About EMM386
Availability
Syntax
Examples
EMM386 Error Messages
About EMM386
EMM386.EXE is an Extended Memory Manager used with Intel 80386 and above processors. This program allows MS-DOS computers to have access to memory above 640KB.
Availability
The EMM386 file is an external command in MS-DOS command and is available in the below versions of Windows
and MS-DOS.
MS-DOS 5.0 and above
Windows 95
Windows 98
Windows NT
Windows 2000
Syntax
Turns on or off EMM386 expanded memory support.
EMM386 [ON | OFF | AUTO] [W=ON | W=OFF]
| ON | OFF | AUTO |
Activates or suspends EMM386.EXE device driver, or places it in auto mode. |
| W=ON | OFF |
Turns on or off Weitek coprocessor support. |
Examples
EMM386 = Typed alone would load the extended memory manager, usually by default this would be loaded in the autoexec.bat.
EMM386 error messages
| EMM386 error number |
Description |
| 0 |
Divide Error |
| 1 |
Debugger interrupt |
| 2 |
Nonmaskable interrupt |
| 3 |
Breakpoint |
| 4 |
Overflow interrupt |
| 5 |
Array boundary violation. |
| 6 |
Invalid Opcode |
| 7 |
Coprocessor not available. |
| 8 |
Double fault |
| 9 |
Coprocessor segment overran. |
| 10 |
Invalid task statement. |
| 11 |
Segment not present. |
| 12 |
Stack exception. |
| 13 |
General Violation |
| 14 |
Page fault |
| 16 |
Coprocessor Error |
To resolve error 12 from C:\> type edit config.sys and add the below line STACKS=16,256; if you already have a stacks line in the config.sys, ensure it is =16,256.
Error 13 is an indication that a software program
or driver is trying to use protected mode without cooperating with EMM386. You may need to obtain VCPI-compliant version of the program
or driver from your vendor to correct this error message. |
