Think in analogue...
I reckon you need two video cards: one for the Mac video and one for TV out. Install a second PCI graphics card with TV output as an option. Temporarily put a TV on the TV out. Remember this is 4:3 ratio NTSC/PAL/SECAM output. Set the Mac desktop to mirror on the second monitor (TV out) and experiment with resolutions. Experiment with cables of different length until you get something you like on the TV. Unplug TV and loop back to the Media100 card.
Conduct a similar exercise for sound out using the Mac's built-in port. Record onto cassette or similar. If you're brave, try looping back to a PCI Mac sound card. For beeps and squeaks, any Mac model should be good enough.
ATI made a few video cards with S-video out.
Consider how you are reading and writing data. The Media100 software will need exclusive access to a fast SCSI drive.
I reckon you need two video cards: one for the Mac video and one for TV out. Install a second PCI graphics card with TV output as an option. Temporarily put a TV on the TV out. Remember this is 4:3 ratio NTSC/PAL/SECAM output. Set the Mac desktop to mirror on the second monitor (TV out) and experiment with resolutions. Experiment with cables of different length until you get something you like on the TV. Unplug TV and loop back to the Media100 card.
Conduct a similar exercise for sound out using the Mac's built-in port. Record onto cassette or similar. If you're brave, try looping back to a PCI Mac sound card. For beeps and squeaks, any Mac model should be good enough.
ATI made a few video cards with S-video out.
Consider how you are reading and writing data. The Media100 software will need exclusive access to a fast SCSI drive.