> The third one is from Xebec Systems and is
labeled "Apple Host Adapter".
It
> has a 50-pin 0.1" header along one side. No
custom silicon (only an
EPROM).
Given the
manufacturer and pin header, I'm guessing SCSI.
Or maybe SASI?
SCSI. It was used in the Sider HD. It was just a case with power supply
and ST251N Seagate hard disk.