Editing Macintosh LC (section)

=== RAM Configuration ===

The LC shipped with 2 MB of RAM standard, expandable to 10 MB. Memory expansion uses two 30-pin SIMM slots, which must be populated in pairs using matching SIMMs. The machine uses 100ns or faster SIMMs.

'''2 MB of the total is on the board''', so the two 30-pin slots are additional: 2 MB standard with the slots empty, and Apple's maximum of '''10 MB''' is 2 MB on board plus two 4 MB SIMMs, 100 ns or faster.<ref name="sslcs" /> Configuration tables that show the base 2 MB coming from a pair of 1 MB SIMMs cannot be right: that would leave no route to 10 MB.

'''The sound on the LC, LC II and LC III is monophonic in and out.''' Apple's own wording is a mono sound input and output port on a mini phono plug, and a monophonic 8-bit sound generator supplying the same signal to both channels of stereo equipment.<ref name="sslcs" /> Stereo output arrives with the '''LC 475 and Quadra 605'''. A stereo input/output description on the earlier machines is wrong, and it matters when diagnosing a channel that sounds dead: on an LC, LC II or LC III both channels carry the same signal by design.