The 9600 has absolutely no onboard video I/O. It's all PCI cards.
I know for a fact that Avid sold 9600's with Truevision boards. Options included hardware MJPEG compression, sound and SCSI cards. My truevision cards are limited to Mac OS 7.5.5 because it seems nobody ever made the updated drivers and control panel public (and if you try running the control panel on anything later the machine simply crashes) but the card not only works with Avid's suite but also Adobe Premiere which a s touch easier to get hold of.
I know for a fact that Avid sold 9600's with Truevision boards. Options included hardware MJPEG compression, sound and SCSI cards. My truevision cards are limited to Mac OS 7.5.5 because it seems nobody ever made the updated drivers and control panel public (and if you try running the control panel on anything later the machine simply crashes) but the card not only works with Avid's suite but also Adobe Premiere which a s touch easier to get hold of.