Editing Macintosh Plus (section)

== Architecture and Processor ==

The Macintosh Plus is powered by the '''Motorola MC68000''' microprocessor, operating at 8MHz.<ref>{{cite web |url=http://www.easy68k.com/paulrsm/doc/dpbm68k1.htm |title=Design Philosophy Behind Motorola's MC68000 |author=Thomas W. Starnes |publisher=BYTE Magazine |date=April 1983 |access-date=2025-01-25}}</ref> This 16/32-bit processor features:
* '''32-bit internal registers''' with 16-bit data bus
* '''16-bit address bus''' supporting up to 16 MB of addressable memory
* '''8 MHz clock speed''' providing improved performance over earlier Macintosh models

The processor features 32-bit register width, 16-bit data bus width, and 32-bit address bus width, though the Mac Plus motherboard had only 22 address lines connected, for a 4 MB maximum memory configuration.<ref>{{cite book |last=Williams |first=Gregg |title=The Apple Macintosh Computer |publisher=BYTE |year=1984 |isbn=0070705151}}</ref>