tdfx's use of PIOOffset

Jeremy Huddleston jeremyhu at apple.com
Wed Oct 19 00:53:55 PDT 2011


So the tdfx driver has this hunk of code in it currently does the following:

#if USE_PCIVGAIO
  hwp->PIOOffset = pTDFX->PIOBase[0] - 0x300;
#endif

Can someone please explain to me why it's doing that?



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