LSI SYM22801 - Manual (Page 62)

A-6 Technical Specifications
A.3.2 The SCSI Interface
The SCSI interface operates as 8-bit or 16-bit, synchronous or
asynchronous, single-ended bus, and supports SCSI-2 protocols and
16-bit arbitration. The interface is made through connectors J2, J3 and
J4 for channel A. Channel B connectors are J6, J7, and J8. Connectors
J2 and J6 are 68-pin high density right angle receptacles for internal
connections. Connectors J3 and J7 are 68-pin VHDCI right angle
receptacles that protrude through the back panel bracket. Connectors J4
and J8 are 50-pin low density vertical shrouded headers used for internal
SCSI connections.
Note: Up to two (and only two) connections are allowed on each
channel. Connecting to all three connectors on a channel
will result in an unreliable configuration.
Active single-ended SCSI termination is provided automatically. SCSI
termination power is also supplied by the board. The following tables
show the signal assignments for J2/J6, J3/J7, and J4/J8.