macintosh plus
Minimum OS: System 3.0
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
macintosh plus
The mac plus was the answer to complaints that the original Mac was not expandable. It doubled the ROM of the 512k from 64k to 128k, 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).