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K Service Source
Macintosh II/IIx/IIfx
K Service Source
Basics
Macintosh II/IIx/IIfx
Basics Overview - 1
Overview
This manual includes
complete repair procedures
for the Macintosh II,
Macintosh IIx, and
Macintosh IIfx.
Figure: Macintosh II, IIx, IIfx
K Service Source
Specifications
Macintosh II/IIx/IIfx
Specifications Processor - 1
Processor
CPU
Macintosh II Motorola 68020 microprocessor
15.6772 MHz
Optional built-in paged memory management unit (PMMU)
Macintosh IIx Motorola 68030 microprocessor
15.6772 MHz
Built-in paged memory management unit (PMMU)
Macintosh IIfx Motorola 68030 microprocessor
40 MHz
Built-in paged memory management unit (PMMU)
Specifications Processor - 2
Coprocessor
Macintosh II Motorola 68881 math coprocessor
Macintosh IIx/IIfx Motorola 68882 math coprocessor
Addressing 32-bit registers
32-bit address bus
32-bit data bus
Specifications Memory - 3
Memory
RAM
Macintosh II/IIx 1 MB, expandable to 8 MB
Macintosh IIfx 4 MB standard, expandable to 8 MB
ROM
Macintosh II/IIx 256K
Macintosh IIfx 512K
Specifications Disk Storage - 4
Disk Storage
Floppy Drive
Macintosh II Internal 800K floppy drive
Optional second internal 800K floppy drive
Optional internal 1.4 MB floppy drive upgrade
Macintosh IIx/IIfx Internal 1.4 MB floppy drive
Optional second internal 1.4 MB floppy drive
Hard Drive Optional internal 40, 80, or 160 MB hard drive
Specifications I/O Interfaces - 5
I/O Interfaces
Expansion Processor-direct slot (PDS)
SCSI 5 MB/sec. transfer rate
Eight device maximum
Apple Desktop Bus Two ADB ports allow daisy-chaining of peripheral devices
Serial Two RS-232/RS-422 serial ports; mini DIN-8 connectors
NuBus Six internal NuBus slots support full 32-bit address and data
buses
Specifications Sound and Video - 6
Sound and Video
Sound Generator Apple's custom digital sound chip provides 8-bit stereo sampling
at 44.1 kHz and includes four-voice, wavetable synthesis;
capable of driving stereo headphones or other stereo equipment
through the sound jack.
Specifications Electrical - 7
Electrical
Line Voltage 100