SCSI was optional on the Phoenix, as far as I can tell. The SCSI controller chip is just a standard NCR 5380, but without the PAL and the auto boot ROM, it's not going to do you much good.
Sorry...perhaps a stupid question...do these chips are identicals?
- L5380PC (LOGIC) DIP40pins
- AMD5380 DIP40pins
- NCR 5380 PLCC
- NCR 53C80