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This allows applications to bypass the system and work directly with the hardware.

IOPL=value

Default settings:

• IOPL=YES

Parameters:

Value can be YES or NO or a list of specific programs . If set to NO, no programs can access the hardware directly. The list of programs which have direct access to hardware must contain only the executable name without the path and each program must be separated by a comma.

See the examples below.

If you don't want to allow any program to access the hardware directly, add this line to your config.sys file:

If you want to allow the programs prog1.exe and prog2.exe to have direct hardware access, then use this line:

Platform Support:

OS/2 2.x	OS/2 3.0	OS/2 4.0
Yes	Yes	Yes