Apple Mac Performa 5300 CD series (Tech informatiom) - Manual (Page 6)

m Two stereophonic sound output ports, level nominally 0.5 volts RMS into
39 ohms
m Internal stereo speakers, muted whenever a plug is inserted into either
sound output port
Clock/calendar
m CMOS custom chip with battery
Keyboard
m Supports all Apple Desktop Bus (ADB) keyboards
Additional interfaces
m ADB port for keyboard, mouse, and other input devices using a low-speed,
synchronous serial bus
m Two serial ports for printers, modems, and other serial devices
m High-performance SCSI port for a chain of up to seven hard disk drives,
scanners, printers, and other devices
m LC-compatible 68030 processor-direct slot (96/114-pin)
m Communication slot for optional internal modem or Ethernet card
(112-pin) (depending on the configuration of your computer, a modem or
card may already be installed in this slot)
m Video-in slot for optional expansion card providing real-time video display,
video capture, and overlay (60-pin) (depending on the configuration of
your computer, a card may already be installed in this slot)
m Port for optional internal TV tuner card (depending on the configuration of
your computer, a card may already be installed in this port)
m Optional monitor-out port for video mirroring (using external video
connector kit, purchased separately)
WARNING If the clock begins to lose accuracy, see your authorized
Apple dealer or service provider for a battery replacement. Do not
attempt to replace the clock battery yourself.
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