Apple Macintosh LC - Manual (Page 161)

to turn the computer on, and the Shut Down command in the Special menu
together with the on/off switch to turn the computer off. The reset function
is useful in rare situations when a software problem occurs and your computer
seems to "freeze up." Because using the reset function restarts the computer,
you will lose any work that you have not saved.
The interrupt feature is for programmers, and works only if you have
appropriate debugging software installed. Debugging software is available
from APDA, the Apple Programmers and Developers Association.
Ports and pin assignments
This section lists the pin assignments and functions for all the external
connectors.
!! IMPORTANT: The connector type listed for each port indicates the correct
plug to use with the port illustrated. !!
- Connector type: 4-pin minicircular
- Total length of all cables not to exceed 5 m (16 ft.)
!! WARNING: The SCSI port uses the same type of connector as a standard RS-
232, DB-25 serial interface, but it is electrically very different. Do not
connect any RS-232 device to this connector. Doing so can result in damage to
both the device and the Macintosh LC. !!