Olivetti M20 technical specifications:

Processor:	Zilog Z8001
Clock speed:	4MHz
RAM:	128kB expandable up to 512kB (or 1MB?)
ROM:	8kB containing the startup and boot program
Operating systems:	PCOS, CP/M8000, MS-DOS (with the APB 8086 card)
Screen:	B/W, Green, Amber, 4 or 8 colors
Graphic resolution:	512x256 pixels
Text layout:	80x25 or 64x16 characters
Disk drives:	One or two 160kB-320kB-640kB on 5"1/4 drives
Hard disk:	Optional 11.5MB Winchester
Installed interfaces:	RS232 and Parallel (Centronics), with proprietary connectors
Optional interfaces:	Double RS232 (normal and current-loop) and IEEE488

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