Many years ago, when purchasing a Micron Xceed Color30HR on eBay, I got a floppy disk to boot, with the aforementioned sourcecode for the ROM of said card.
I sent a copy off to Gamba; unfortunately I've since learned he's passed away.
Long story short; my SE/30 suffered from a leaking PRAM battery, which ate through the motherboard AND the IIsi ROM (*sigh*) - only last week did I get a replacement board, and found the sourcecode once again.
I also have, in hardcopy, schematics of the PCB and stuff.
On the off chance *someone* might be interested in producing a replica board, I hereby post the sourcecode as it was given to me. On request, I'll see if I can scan the large A3/A2 schematics in a print shop.
Given the Micron no longer exists, I foresee no problems pertaining to copyright. But, I might be in the wrong there!
The archive is compressed with Stuffit 3.0.3, and converted with BinHex 5 on my SE/30! The extension .bin has been replaced by .txt, as the forum would not allow me to post .bin-files
Cheers, and good luck!
PS. Anyone out there with a spare wire-harness for the Xceed grayscale setup? Mine has vanished...! And I'm talking only the wire harness, not the CRT board!