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# Macintosh Plus

AKA

Macintosh Plus ED

Essentials

Family: Classic Macs

Codename: Mr. T

Gestalt ID: 4

Minimum OS: System 3.0/Finder 5.1

Maximum OS: 7.5.5

Introduced: January 1986

Terminated: October 1990

Processor

CPU: Motorola MC68000

CPU Speed: 8 MHz

FPU: none

Bus Speed: 8 MHz

Register Width: 32-bit

Data Bus Width: 16-bit

Address Bus Width: 32-bit

ROM: 128 kB

RAM Type: 30 pin SIMM

Minimum RAM Speed: 150 ns

Onboard RAM: 0 MB

RAM slots: 4

Maximum RAM: 4 MB

Video

Monitor: 9" built-in

Max Resolution: 1 bit 512x342

Storage

Floppy Drive: 3.5" 800 kB

Input/Output

Floppy: DB-19

Joystick/Mouse: DE-9

Serial: 2 DE-9

SCSI: DB-25

Audio Out: 8-bit mono mini

Speaker: 8-bit mono

Miscellaneous

Power: 60 Watts

Dimensions: 13.6" H x 9.6" W x 10.9" D

Weight: 16.5 lbs.

Announced in January 1986, the Mac Plus was the answer to complaints that the original Mac was not expandable. It doubled the ROM of the 512k from 64 kB to 128 kB, and increased the RAM to 1 MB (expandable to 4 MB). It was the first Mac to include a SCSI port, allowing for a variety of external peripherals, and was the first mac to use the now familiar platinum case color (although it initially shipped in beige). The Mac Plus originally sold for $2600, and was sold to educational markets as the Mac Plus ED.

Picture Credits:
Todo Apple Blog