DriverLINX Port I/O Driver (often referred to as DLPortIO) by Scientific Software Tools, Inc. is a lightweight kernel-level driver with a companion user-mode library that enables direct I/O port access from Windows applications. It provides a simple API for reading from and writing to x86 I/O port addresses, making it practical for controlling legacy hardware such as PC parallel ports, serial UART registers, and ISA-based add-on boards.
Designed for developers, engineers, and hobbyists, the driver removes the need to write a custom kernel driver to perform IN/OUT instructions, speeding up development for test, measurement, and automation tasks. Typical uses include toggling control lines on the LPT port, bit-banging, device prototyping, and maintaining compatibility with older equipment that expects port-level access.
Installation deploys a kernel component and a user-mode interface that applications can call directly. Administrative privileges are required to install and start the driver. Because direct port access can affect system stability, it should be used carefully and only with hardware you understand. The software originated for NT-class versions of Windows; compatibility on modern 64-bit systems may vary depending on OS version and driver-signing policies.
DriverLINX Port I/O Driver is developed by Scientific Software Tools, Inc.. The most popular version of this product among our users is 1.0. The names of program executable files are port95nt.exe, PortIO.exe and VBPortIO.exe.
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