Command
autoexec.bat && config.sys
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Below is an example of what an autoexec may look like:
@echo off
SET SOUND=C:\PROGRA~1\CREATIVE\CTSND
SET BLASTER=A220 I5 D1 H5 P330 E620 T6
SET PATH=C:\WINDOWS;C:\
LH C:\WINDOWS\COMMAND\MSCDEX.EXE /D:123
LH C:\MOUSE\MOUSE.EXE
DOSKEY
CLS
| COMMAND | EXPLANATION |
| @echo off | Tells DOS to just read the lines but don't echo them back to the screen. |
| SET SOUND=C:\PROGRA~1\CREATIVE\CTSND | This example is for the particular sound card that we have in one of the machines that we have. The set sound is telling the computer to send all sound events that the computer may run to that directory. |
| SET BLASTER=A220 I5 D1 H5 P330 E620 T6 | Tells the computer to set the sound blaster settings. This is a good line for game players; if you have this line in your autoexec.bat you will know all settings for your sound card. A220 = port address "220", I5 = IRQ 5, D1 = DMA 1 usually being the settings you will need for any game out on the market. |
| SET PATH=C:\WINDOWS;C:\ | Sets the computer to look in the C:\windows directory or the root if a command used at the prompt is not found. |
| LH C:\WINDOWS\COMMAND\MSCDEX.EXE /D:123 | Line used for the CD-ROM. If you have Windows 95+, the MSCDEX will always be in the C:\WINDOWS\COMMAND. In Windows 3.x or DOS, this will usually be either in C:\DOS or C:\WINDOWS directory. The /D:123 is the name of the driver name that loads in upper memory; this can be anything, usually /D:MSCD0001. However, this is not an actual driver, this is just the name for the driver. Ensure if you change this line that you change it in the config.sys on your CD-ROM line. If the two are not the same, your CD-ROM drive will not load. |
| LH C:\MOUSE\MOUSE.EXE | Loads the mouse driver into memory. However, not all mice use the same drivers. Although the mouse may use mouse.exe it could also be "mouse.com" or "mouse.sys", which is loaded in the config.sys. |
| C:\DOS\SMARTDRV.EXE /X | Loads the smartdrive disk cache utility into memory. See our smartdrv command page for additional information about this utility. |
| DOSKEY | Simple dos command to load DOSKEY into memory so when in DOS you can use it without having to load it. |
| CLS | MS-DOS command to clear screen. |
| WIN | Used for users using Windows 3.x, this line will load Windows automatically when booting the computer. |
Below is an example of what the config.sys may look like:
DEVICE=C:\WINDOWS\HIMEM.SYS
DOS=HIGH,UMB
DEVICE=C:\WINDOWS\EMM386.EXE NOEMS
FILES=30
STACKS=0,0
BUFFERS=20
DEVICEHIGH=C:\WINDOWS\COMMAND\ANSI.SYS
DEVICEHIGH=C:\MTMCDAI.SYS /D:123
| COMMAND | EXPLANATION |
| DEVICE=C:\WINDOWS\HIMEM.SYS | The Himem.sys line is a very important line; this line will allow you to load drivers into high memory. If this line is not present, Windows 3.x will not load. |
| DOS=HIGH,UMB | This line will load DOS into high memory in an upper memory block. Note the location usually best placed after the HIMEM.SYS. |
| DEVICE=C:\WINDOWS\EMM386.EXE NOEMS | The EMM386 line loads the extended memory manager, however note that some MS-DOS games have problems with extended memory and will not run without the NOEMS statement. |
| FILES=30 | The files line allow Windows to load 30 files at the same time. Usually, however, going higher may decrease the computer's performance; 30 is found to work the best. Also ensure that this line is all as one line and that there is not a space between and after the =. |
| STACKS=0,0 | The stacks line was first used in MS-DOS 3.2 and was used to swap the stack whenever an asynchronous hardware interrupt occurred. Later in MS-DOS 3.3 the line STACKS=0,0 was added into the config.sys. In special circumstances, this line was changed to STACKS=9,128. The STACKS statement has a range of 8-64, 32-512. If a higher value is entered you will receive a FATAL : Internal Stack Failure, System Halted error message. |
| BUFFERS=20 | Buffers line is to load buffers into memory allowing Windows to load memory. |
| DEVICEHIGH=C:\WINDOWS\COMMAND\ANSI.SYS | The ansi.sys line is a driver for DOS to allow you to have different colors / sizes and special characters at the DOS prompt. |
| DEVICEHIGH=C:\MTMCDAI.SYS /D:123 | This line is the name of the CD-ROM driver on the particular system we are working on. The /D:123 represents the name of the driver, which in this case is named 123, however, can be named anything, usually MSCD0001. Note, however, that /D:123 must be exactly the same in config.sys and autoexec.bat; if they are different, the CD-ROM will not work in DOS. |
| LASTDRIVE= | Allows you to specify the last drive installed on the computer. It is not recommended this line be used unless you are using Windows 3.11 or below. This line can cause issues with Windows 95 & 98 and will generally be remarked by Windows automatically. |
| FCBS= | Line used to specify the number of file-control blocks for file sharing. This line should only be used when programs require it, and today, is generally not used or required. FCBS can utilize between 1 and 255. |
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