Apple Power Macintosh 7100/80AV - Manual (Page 25)

Specifications I/O Interfaces - 6
I/O Interfaces
SCSI
One SCSI port; DB-25 connector
Supports a maximum of six external devices (five when internal
CD-ROM is installed)
Serial Two RS-232/RS-422 LocalTalk/GeoPort serial ports; mini DIN-
9 connectors (backward compatible with mini DIN-8
connectors)
Apple Desktop Bus
One Apple Desktop Bus (ADB) port; mini-Din-4 connector
Maximum power draw 500 mA; maximum of three devices total
Ethernet
One built-in AUUI-15 Ethernet port