Supported System Software: 7.1P3 through 7.1P6, 7.5, 7.5.1, 7.5.3 SCSI: DB-25 Serial Ports: 2 Sound Output: stereo 8 bit. ADB: 1 Ethernet: use Newer Technology 7ET-L10 or 7ET-L10/100 Machine Gestalt ID: 89 Minutiae: Apple sometimes advertises this as a 50 MHz machine, since the clock speed is doubled inside the processor chip. However, all I/O to the processor is done at 25 MHz. Original enabler: 364 Serial Port with the phone icon supports synchronous modems, with handshaking on both output and input supported. Has 1MB ROM and a 1.44MB SuperDrive.