"Trantor T228 MicroChannel SCSI Host
SCSIWorks version 1.3 (Disk1)
products. Includes DOS drivers
Comments and image are from William R.
Walsh and the original
T228 SCSI Host Adapter
I don't normally go into this kind of detail level, but there wasn't much on the adapter...it consists mainly of simple logic chips and PALs.
This looks like a card that came with a bundled CD-ROM drive from NEC. Mine has “NEC-Assembled In USA” printed on the board. Someone has written “NEC CD-ROM” near the external DB25 port. It has sockets for a ROM, probably a boot-BIOS. The sockets on mine are empty.
I don't think this would be a terribly
adapter. However, it is simple and can use the very
inexpensive DB25 (Apple)
SCSI cables. There is also a “standard” 50 pin internal
connector. If you
don't have the matching NEC CD-ROM, I see no reason why
this couldn't be
used as a secondary adapter to drive any other CD-ROM,
scanner or tape
device with reasonable speed. I am not sure what drivers
would be required
to make this adapter work. I've never seen a Zilog SCSI
U1 I think is for "expansion" YMMV.
ADF Sections for @508c "Trantor T228 MicroChannel SCSI Host Adapter"