SCSI controller PROM

[simon chan]

I'm looking for SCSI controller vendor....
I need the following information 

	(1) if there is a company willing to sell the SCSI controller
		section of design, so I can build my own prom code for control.
		I want to build a vary special board (voice!) so it can be
		attach to any SCSI bus.
	(2) Have any one done this before?

	thanks!
							Simon Chan
							201-848-8000
							princeton!hhb!simon