c++ directh

The direct.h header file is a C++ header file that contains declarations for functions that allow for direct hardware access, such as direct memory access and direct I/O port access.

It is an older header file that was commonly used in Windows programming, but it is now considered deprecated and is not supported in newer versions of Visual Studio.

Some of the functions declared in direct.h include:

• _inp() and _inpw(): read a byte or word from an I/O port
• _outp() and _outpw(): write a byte or word to an I/O port
• _disable(): disable interrupts
• _enable(): enable interrupts

Direct hardware access can be risky and can lead to system instability if used improperly. As such, it is generally recommended to use higher-level APIs and libraries instead