Lear Siegler ADM-3A
|Lear Siegler ADM-3A|
20mA current loop,
|Baud Rates||75, 110, 150, 300, 600, 1200, 1800, 2400, 4800, 9600, 19200|
|Phosphors||P4 white, P4 green|
|Refresh Rates||60 Hz, 50 Hz|
The Lear Siegler ADM-3A terminal is an expanded version of the ADM-3 terminal. It was introduced in July, 1976 at a price of $1045. The ADM-3A added direct cursor addressing. By 1981, the price had been reduced to $595.
A graphics option was available in May, 1982 at a price of $1,050.
The terminal was created by Dennis J. Cagan and 3 other engineers at LSI. In 1975, these engineers left Lear Siegler to form Soroc Technology. The first product from Soroc was a design similar to the ADM-3A, which was sold to Beehive as the Beehive B100 in 1976-1977.
- ADM-3A Maintenance Manual
- Tenth Anniversary Edition ADM 3A Dumb Terminal Video DIsplay Terminal Users Reference Manual April, 1986
- User's Manual RG-512 Retro-Graphics Card for the ADM-3A Computer Terminal, January, 1980
- "Lear Siegler Upgrades ADM-1, Gives ADM-3 Full Cursor Ability", Computerworld, July 5, 1976, pg. 16
- Lear Siegler advertisement, Computerworld, August 17, 1981, pg. In Depth/10
- Communications at NCC, Lear Siegler, Inc., Computerworld, May 31, 1982, pg. 47
- "Lear-Siegler Terminal". http://www.old-computers.com/site/header/terminal.asp. Retrieved March 15, 2012.