Macintosh Classic - I;O Interfaces

Specifications I/O Interfaces - 4
I/O Interfaces
Floppy Drive External drive port; DB-19 connector
SCSI One SCSI parallel port; DB-25 connector
Apple Desktop Bus One Apple Desktop Bus (ADB) port; mini DIN-4 connector
Serial Two RS-422 serial ports; mini DIN-8 connectors
Sound Dual-channel headphone connector
Connected to the monophonic sound output
Macintosh Classic does not provide true two-channel output
(although stereo jack may be used)