and (cmd)?= processing.
These features of DOS 6.0+ provide interactive control over execution of
individual CONFIG.SYS commands. DOS 6.2: Ctrl+F8 lets you control
execution of individual commands in AUTOEXEC.BAT.
During the System Startup Sequence, the message...
...appears and the system pauses for 2 seconds. If you press F8 at this
point, DOS displays...
MS-DOS will prompt you to confirm each CONFIG.SYS command.
...and then prompts with...
...before executing each command. Press Y to execute it or N to skip it.
After the last command in CONFIG.SYS, DOS prompts with...
Process AUTOEXEC.BAT [Y,N]?
...and you can skip AUTOEXEC.BAT by pressing Y.
Note: With DOS 6.2+, if you start with Ctrl+F8, you will be prompted
for action on each command in AUTOEXEC.BAT as well as CONFIG.SYS.
This step-by-step batch processing can also be used with any
batch file using the new COMMAND.COM syntax:
Command /Y /C myBat.Bat
█ŢSkipping individual commandsŮ█
You can place a question mark (?) after any CONFIG.SYS command to force
DOS to verify whether you want to execute the command. For instance...
...will cause DOS to display...
DEVICE=RAMDRIVE.SYS 512 [Y,N]?
...and you can press Y to execute it or N to skip it.
See Also: Clean Boot
SWITCHES= (/N disables Clean Boot; /F skips the 2-second delay)