Win95IO direct hardware port I/O DLL for Windows 95 and 98 - (5 KB executable file)
Normally, Windows does not allow you to read or write hardware ports directly.
Win95IO is a freeware DLL that contains two functions called ReadPort and WritePort that allow you to get past this limitation in Windows 95 or Windows 98. Win95IO is provided with a simple Visual Basic program that demonstrates how to call the functions in the DLL.
TinyPort is a shareware device driver and DLL written by Manfred Keul that allows you to perform direct hardware port I/O under Windows NT. TinyPort consists of two files that must be copied to the \SYSTEM32 subdirectory. One is TINYPORT.SYS, the driver. The other is TINYPIO.DLL, a DLL that interfaces your programs to TINYPORT.SYS. Please refer to the Tinyport.wri file for more information on TinyPort