Supported System Software: 7.5, 7.5.1, 7.5.3 SCSI: DB-25 Serial Ports: 2 Sound Output: stereo 16 bit. ADB: 1 Ethernet: AAUI-15 Machine Gestalt ID: 75 Minutiae: Upgraded with two SIMMs at a time. Has 4MB ROM and a 1.44MB SuperDrive.