ocr: Macintosh Plus Technical Specifications Processor Mouse Clock/Calendar MC68000: 32-bit internal Mechanical tracking: optical CMOS custom chip with 4.5- data bus; 7.83-megahertz shaft encoding at 90 pulses volt user-replaceable battery clock speed per inch (3.54 pulses per mm) hackup (includes 256 bytes of Memory of travel memory which remembers with the sys- > 1megahyte RAM, expan- Screen tem machine parameters tumned off) even dable to 4 megabytes in a 9-inch (diagonal) screen; socketed SIMMS (Single In- 512 by 342 pixel bit-mapped Electrical requirements line Memory Module)con- display Iine ...