Commodore CBM 4016

The Commodore CBM 4016 introduced BASIC 4.0 and its built-in disk commands to Commodore’s 40-column all-in-one computer. Early examples used the compact display while later fat-40 machines adopted the larger case and screen.

The 4000 series offered a polished PET platform for education, programming and small-business work.

Notable Features

• 16KB of RAM defines this principal model.
• BASIC 4.0 simplified operation of Commodore’s IEEE-488 disk drives.

Historical Significance

• The 4000 series offered a polished PET platform for education, programming and small-business work.

Collector’s Notes

• PET revisions often share names while differing in motherboard, ROM, keyboard and display hardware; the serial number and internal board revision should be recorded.
• Memory, storage, displays and expansion hardware should be documented because configurations often changed during a system’s working life.

Specifications

Technical Information
Name	Commodore CBM 4016
Manufacturer	Commodore
Launched	Tuesday, January 1, 1980
Discontinued	Mid-1980s
Country	United States
CPU	MOS Technology 6502 at approximately 1 MHz
Units Sold
Form Factor	All-in-one metal desktop computer
Power	Internal mains supply
Networking	PET networking and shared-drive systems available from Commodore and third parties
Operating System	Commodore BASIC in ROM
Expansion / I/O	IEEE-488, cassette, user port and internal expansion connections
Keyboard	Full-size graphics keyboard
Storage	External cassette and IEEE-488 floppy drives; external IEEE-488 disk drives supported
Sound	Piezoelectric beeper on later models; early PETs have no dedicated sound
Colours	Monochrome green or white phosphor
Graphics	MOS 6545/CRTC or discrete PET video logic depending on model; character graphics
Display	Built-in 9-inch or later 12-inch CRT; 40 x 25 text
ROM	BASIC 4.0 with disk commands
RAM	16KB
CPU Speed	Approximately 1 MHz