:Parallel port cards allow the addition of parallel ports beyond the built-in port on PC motherboards. These may be used for realtime functions such as software PWM and step/dir, or for user functions such as controlling coolant, tool changers, relays, etcetera. Nearly any card will work with pin changing functions (hal_parport), but very few cards are compatible with EPP, which is used with parallel port connected FPGA signal generators and controllers. |
:Parallel port cards allow the addition of parallel ports beyond the built-in port on PC motherboards. These may be used for realtime functions such as software PWM and step/dir, or for user functions such as controlling coolant, tool changers, relays, etcetera. Nearly any card will work with pin changing functions (hal_parport), but very few cards are compatible with EPP, which is used with parallel port connected FPGA signal generators and controllers. Several LPT cards and their test results are listed here. |