Columbia University Computing History

The Hazeltine 2000 Terminal

Photo from the Hazeltine 2000 Operating Manual, John L. Wright, Jr.

The Hazeltine 2000 video terminal, circa 1972, possibly the first popular general-purpose video terminal, meaning it had an ordinary RS-232C serial interface that allowed it to connect to any kind of computer that had a serial port and used the ASCII character set. It used in-line escape sequences for cursor positioning and other effects. At Columbia, the only video terminal that preceded it was the IBM 2260, which was IBM-specific, connecting only to an IBM control unit. H2000 specifications:

Construction: Monitor + detachable keyboard
Display: 27 rows x 74 columns, 5.75" x 8.5" display area
Screen: 12" diagonal green phosphor
Character matrix: 5x7 dot matrix
Character set: 64 US ASCII (uppercase only) plus 1 special character
Keys: 51 typewriter keys
Auxilliary keypads: Numeric, editing, and cursor keypads
Visual indicators: Keyboard lamps on right
Interface: RS-232-B
Communication Speeds: 110-9600bps (depending on model)
Dimensions: 12.5"x18.5"x16.0" (monitor); 18.5"x6" (keyboard)
Minimum table depth: 24"
Weight: 62 or 63 pounds (depending on model)
Optional accessories: Tape cassette, printer, remote monitor

A 25x80 display with lowercase letters was available as an option. The 5-position serial-port speed selector was available for three different sets of speeds.

Photo from Hazeltine 2000 brochure, Tom De Bellis.

The right-hand side of the Hazeltine 2000 keyboard, showing the auxilliary keypads and indicator lights. The arrow keypad includes XMIT, PRINT, and HOME keys. The six keys below it are labeled CLR/FG, I/C (Insert Character), D/C (Delete Character), CLEAR, I/L (Insert Line), and D/L (Delete Line). The lights are labled ON/OFF (this is also the power switch), TRANSMIT, RECV, PARITY ERROR, LOCAL, PRINT, BREAK, and RESET. Thanks to Tom De Bellis (formerly of Watson Lab) for the lower photo, scanned from an H2000 promotional leaflet. You can view the leaflet at high resolution if you wish (these are big files, 1MB to 2.5MB each):

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Frank da Cruz / / Columbia University Computing History / Aug 2001 / Reformatted Jul 2017