Service Manuals, User Guides, Schematic Diagrams or docs for : apple macintosh_128k.512k

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K Service Source




    Macintosh
K Service Source




        Basics
      Macintosh
Basics                                                Overview - 1


                                       Overview
                                       This manual includes repair
                                       procedures for the earliest
                                       Apple Macintosh
                                       computers--the Macintosh
                                       128K and Macintosh 512K.




         Figure: Macintosh 128k/512K
K Service Source




Specifications
      Macintosh
      Specifications                                   Processor - 1

                       Processor

CPU                    Motorola 68000 microprocessor
                       7.83 MHz
                       32-bit internal data bus
  Specifications                                                      Memory - 2

                   Memory
RAM                128K or 512K
ROM                64K
PRAM               CMOS custom chip with 4.5 V, user-replaceable battery backup
                     (includes 256 bytes of memory; remembers system
                     parameters even with the machine switched off)
     Specifications                                                   Disk Storage - 3

                      Disk Storage

Floppy Drive          Internal, single-sided drive; uses 3.5-in., hard-case, 400K
                         floppy disks
         Specifications                                               I/O Interfaces - 4

                          I/O Interfaces

Floppy Drive              External drive port; DB-19 connector


Mouse                     Mouse port; DE-9 connector


Keyboard                  Synchronous serial keyboard bus; RJ-11 connector


Serial                    Two RS-232/RS-422 serial ports; DE-9 connectors
    Specifications                                                     I/O Devices - 5

                     I/O Devices

Keyboard             58 keys; software mapped; RJ-11 connector


Mouse                Mechanical tracking; optical shaft encoding at 3.54 pulses per mm
                     (90 pulses per in.) of travel; DE-9 connector
     Specifications                                                Sound and Video - 6

                      Sound and Video

Sound Generator       Four-voice sound with 8-bit digital/analog conversion, using
                      22-kHz sampling rate


Video Display         9-in. (diagonal) screen; 512 x 342 pixel, bit-mapped display
     Specifications                 Electrical - 7

                      Electrical

Line Voltage          105

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