PCI cards known to work with LinuxCNC < 2.7.8 :

• SIIG CyberPro with Oxford OX9162 chip
• ITE8875 chip
• PCIe cards known to work:
• Syba SD-PEX1005 with either MCS9900 or MCS9901 chips

For linuxCNC versions 2.7.8 and later, there is an option on the command line that installs the driver to select whether to force the direction change or not. By default, the driver does NOT force the direction change. To make it force the direction change, add the following text to the command line :

epp_dir=1

The command will be in the file ppmc_load.hal, univstep_load.hal, or univpwm_load.hal, depending on the configuration you are using. It will be of the form :

loadrt hal_ppmc

possibly with additional parameters at the end. Edit it to look like :

loadrt hal_ppmc epp_dir=1

PCI cards known to work with LinuxCNC >= 2.7.8

• SIIG CyberPro with Oxford OX9162 chip
• ITE8875 chip (may not work on some HP motherboards)
• NetMos MCS9865IV-AA needs epp_dir=1 option
• NetMos MCS9835 needs epp_dir=1 option

PCIe cards known to work with LinuxCNC >= 2.7.8

• Syba SD-PEX1005

PCI cards that do not work with any version :

NetMos MCS9805 chip

PCIe cards that do not work with any version :

WCH CH382L chip