Service Manual

System Overview 1-21
Integrated SCSI Controllers
Types . . . . . . . . . . . . . . . . . . two Adaptec AIC-7890 Ultra2/LVD (Fast-40)
controllers, with integrated 68-pin SCSI
connectors on the system board;
Adaptec AIC-7860 Ultra/Narrow controller,
with integrated 50-pin SCSI connector on the
system board
Drives
Externally accessible
bays . . . . . . . . . . . . . . . . . . . one 3.5-inch bay dedicated to a diskette drive;
one 5.25-inch bay (upper bay) containing a
CD-ROM drive; two 5.25-inch bays for op-
tional devices. Optional cage can be installed
in the two option bays to support two addi-
tional hard-disk drives.
Internally accessible
bays . . . . . . . . . . . . . . . . . . . six bays for SCSI hard-disk drives
Ports
Externally accessible:
Serial (DTE) . . . . . . . . . . two 9-pin connectors; 16550-compatible
Parallel . . . . . . . . . . . . . . one 25-hole connector (bidirectional)
Video . . . . . . . . . . . . . . . one 15-hole connector (VGA-compatible)
PS/2-style keyboard . . . . 6-pin mini-DIN
PS/2-compatible
mouse . . . . . . . . . . . . . . 6-pin mini-DIN
Server-management bus
daisy-chain connector. . . two modular 8-pin connectors
Internally accessible:
Ultra2/LVD SCSI
controllers . . . . . . . . . . . two 68-pin connectors
Ultra/Narrow SCSI
controller . . . . . . . . . . . . 50-pin connector
Diskette drive . . . . . . . . . 34-pin connector
Table 1-6. Technical Specifications (continued)