DEC VT05

DEC VT05
Manufacturer	DEC
Model	VT05
Lifetime
Introduced	November, 1970
Communication
Interfaces	RS-232C, 20 mA current loop
Baud Rates	110, 150, 300, 600, 1200, 2400
Display
Refresh Rate	60 Hz
Character Modes
Resolution	72x20
Matrix	5x7
Firmware
CPU	discrete logic
Code Chart	DEC VT05

The DEC VT05 DECscope terminal was introduced in November, 1970 at the Fall Joint Computer Conference. It was DEC's first raster video terminal. The VT05A supported baud rates up to 300 baud, the VT05B supported baud rates up to 2400 baud. The VT05 could transmit both lower and upper case, but could only display upper case.

The terminal consists of a single enclosure housing the screen, keyboard and discrete control circuitry. The control circuitry is housed in a small card cage housing 4 card modules interconnected by a backplane. The modules are designated M7000 (cursor control), M7001 (character generator and timing), M7002 (memory and memory timing), and either M7003 (interface) or M7004 (high speed interface).

The VT05 was more than a "glass tty" with the following features:

• cursor home
• directional cursor movement
• direct cursor positioning
• erase to end of line
• erase to end of screen
• fixed horizontal tab stops

The VT05 can overlay its alphanumeric display on top of an incoming RS-170 video signal. The combined display is available from a connector on the rear of the terminal.

Manx

• VT05 Engineering Drawings, 1974
• VT05 Alphanumeric Display Terminal Reference Manual, September, 1973
• VT05 Alphanumeric Display Terminal Maintenance Manual, April, 1973
• VT05 Alphanumeric Dispay Terminal Illustrated Parts Breakdown, May, 1973

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External Links

• DEC VT05 video terminal from 1973 in action, YouTube
• VT05 emulator, GitHub