Umberto Zanghieri's ZP Engineering srl offers a LPTTCL extension [L1 ] for parallel-port work on Windows 98, NT, and 2000.
A few notes on LPTTCL by UZ.
- parallel port access on Win98 is rather easy; on the other hand, doing the same on NT and 2000 requires a driver. LPTTCL attempts to provide the same technique on all three platforms.
- it allows access not only to the data port, but also to control and status registers; this allows for many options (i.e., emulation of EPP cycle access)
- it is not speed optimized; bit-by-bit control is rather slow.
- it has been designed for simple control of external devices and emulation of serial protocols as I2C.
[Many other references.]
[Basic applicable technique is to open the port (by name) and write to it.]
Serial port programming is of related interest.