these Proms are from a sun 4/300 CPU board tag # 501-1316 rev 11-50
prom rev 4.1.1 requires 27C512 eproms

these are binary images 

socket # | eprom image file
U2100    =   1035-09.rom
U2101    =   1038-09.rom
U2102    =   1037-09.rom
U2103    =   1036-09.rom

