lptdrv
a tool to control LPT-attached devices manually or on a time basis
A DOS "driver" for computer LPT ports (parallel "CENTRONICS"). It allow to change easily the logic states of any pins, either manually or automatically (on a predefined time basis).
With a small electronic circuit we can for example drive electric devices trought the PC. The program can support max. 24 devices and 3 LPT ports (0x287, 0x387 and 0x3BC).