The PC-DOS


_________The PC-DOS_________
System contain 3 special file:

1 CONFIG.SYS
2 AUTOEXEC.BAT
3 COMMAND.COM

Mostof DOS’s configuration information is stored in two files:
1 CONFIG.SYS
2 AUTOEXEC.BAT
The CONFIG.SYS file is a text file that contains special commands.
It set up computer’s hardware components
load the device drivers (such as memory, keyboard, mouse,and printer)

The AUTOEXEC.BAT file is a special batch file that DOS runs immediately after CONFIG.SYS
commands you want to carryout when you start your system.

Order of CONFIG.SYS execution
(A) adding DEVICE and DEVICEHIGH(load driver in upper memory)
1 HIMEM.SYS system with ‘extended memory’.
WMSDRV.SYS
NETWORK.SYS
RAMDRIVE.SYS
2 ‘expanded memory’ mode.
3 NOEMS / EMS processor with extended memory.
4 DPMS(Dos Protected Mode Services)
5 user devices
(B) FILES (rooms for files)
BUFERES (buff for information with disk driver)
BREAK (checks Ctrl + z..)
LASTDRIVE (reserve space for logical drive)

AUTOEXEC.BAT Command
PROMPT
MODE
PATH
ECHO
SET
CLS

New versions of DOS
No support ram boost
CONFIG.SYS
“FILES=40″ (can open max 40 files one time)
AUTOEXEC.BAT
” REM Dummy file for NTVDM ”

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