Supported System Software: 6.0.7 through 7.0.1, 7.1, 7.1.1, 7.5, 7.5.1, 7.5.3 SCSI: DB-25 Serial Ports: 2 Sound Output: mono 8 bit. ADB: 1 Ethernet: use Newer Technology 7ET-L10 or 7ET-L10/100 Machine Gestalt ID: 19 Minutiae: Upgraded two SIMMs at a time. Accepts an FPU card for increased performance on math functions. Serial Port with the phone icon supports synchronous modems, with handshaking supported on the output, not the input. Has 512KB ROM and a 1.44MB SuperDrive. Contains a 16-bit LC Processor Direct Slot (PDS).