Help Identifying Mystery SBUS Cards

Hello all, I was hoping to tap into the considerable Sun Microsystems experience within this group. I picked up a significant quantity of Sun SPARC equipment back in the early 00?s and due to life/children/etc. have only recently been able to start cataloguing it. In particular, I had a somewhat tatty box full of assorted SBUS cards. Amongst the usual GX / TGX frame buffers, ethernet and narrow SCSI cards were some more unusual ones I?ve struggled to identify. I have photographed (poorly, I only have my mobile phone camera) the items, and they can be viewed here: https://www.dropbox.com/sh/kv42ig8nucikt0p/AAAKMZkqn9r19Ti0yKllQ2g8a?dl=0 <https://www.dropbox.com/sh/kv42ig8nucikt0p/AAAKMZkqn9r19Ti0yKllQ2g8a?dl=0> Here is a text description of the cards, in case it can be useful: (1) A dual-width SBUS card with no internal or external interfaces or backplate. Other features include 2x LSI chips 'LIA7321 EK7B7483' and 'LIA6371 EK7B7484? and a sticker displaying '7B7488 011 0110-014 0643 1700556 9651? a barcode ?J0BAW?. I wondered if it might be a DSP of some kind? (2) A dual width SBUS framebuffer, with space for a piggyback daughter SBUS card in the middle. It features 3 x Bt457 RAMDACs and an Actel A1020A chip. (3) A 3M fibre card, looks like a prototype based on the number of bodge wires. FDDI? Marked '3M ASSY 78-8095-5382-5', ROM marked FOSSIL BD. 1AS8. (4) Possible Serial card with a DB9 connector, although there?s WAY too much logic for a simple serial card. Has a jumper for 4Mhz / 16Mhz which hints at maybe something Token-ring? (5) A SBUS card with S-Video and what I assume to be composite. Looks like a 501-3019 on first inspection but there?s less logic and no heatsink on board. (6) A rather beautiful (to look at) SBUS card by Performance Technologies Inc. This one strikes me as a multi-port serial card although I don?t have the breakout HD80 lead for it. Has a chip marked 820P010201 HG62S038R02F 9120, a sticker ?120P010001' and on the back of the board '#595801-01 DC 9116 NT2V0 94V0' and '124-010000?. Any insight would be gratefully received! Thanks, Austin.