Supported System Software: 7.1.2P, 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, 7ET-L10/100, 7ET-C10 or 7ET-C10/100 Machine Gestalt ID: 98 Minutiae: Apple sometimes advertises this as a 66 MHz machine, since the clock speed is doubled inside the processor chip. However, all I/O to the processor is done at 33 MHz. Sound output is 16-bit stereo for CD playthrough. Sound output is 8-bit for Macintosh generated sounds. Front headphone jack is 16-bit stereo. Has a 32-bit 030 LC Processor Direct Slot (PDS). Original enabler: 405 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.