Found this on Soyo Germany's archived website .

https://web.archive.org/web/19971108153621/ht … hics/ps2pin.gif

EDIT: and this on Soyo Taiwan (same pinout as the German version, but with English labels):
https://web.archive.org/web/20010616013939/ht … gefaq/syps2.gif

EDIT2: There's also this, depending on what the header looks like .
https://web.archive.org/web/20040303204144/ht … aq/sy6kfps2.gif

Sorry for the necropost, but for anyone stumbling upon this topic: there is a free utility you can download called PRTADD. It can detect most PCI and PCIe parallel and/or serial port cards and register them in the BIOS Data Area (BDA). That way, well-written DOS applications and games will be able to look up the correct I/O base port corresponding to the standard device files LPT1, LPT2, COM1, etc. See this post for more info.