A bit about the Sun...
The video connector is called a 13W3, adapters easily found on ebay. The keyboard is a sun-specific interface and the mouse plugs into the keyboard. BTW, there is no onboard VRAM, so you need a VRAM DIMM in one of the last two memory slots.

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I think one or two macs used this video interface...

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Yup, but that'd be one or two Video Cards for interfacing with the APD, which was OEM'd by Radius for Apple. I don't know for sure, but I'd bet Apple had a Radius OEM'd TPD using this familiar connector as well. [] ]'>

I haven't had time to look for my APD cables yet, but I will tonight for sure!