Image display apparatus

Details Image display apparatus Image display apparatus

1986-11-24

1989-02-07

Curtis, Marshall M.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340814, 340799, G09G 100

Patent

active

048034754

ABSTRACT:
An image display apparatus including a display memory which is accessed by a central processing unit for controlling input/output traffic of image information and by an image display device such as CRT in a time division multiplex mode. There are further provided a circuit for detecting a time deviation between a signal (Ac) representing a period during which the central processing unit can access the display memory and a signal (ALE) denoting an initiation of a machine cycle, and a circuit for controlling the wait condition in the central processing unit in accordance with the detected time deviation, so that the access of the central processing unit to the display memory is always synchronized with the access of the image display device to the display unit.

REFERENCES:
patent: 4326202 (1982-04-01), Kidode et al.
patent: 4439759 (1984-03-01), Fleming et al.
patent: 4468662 (1984-08-01), Tanaka
patent: 4511965 (1985-04-01), Rajaram
patent: 4663735 (1987-05-01), Navak et al.
patent: 4692759 (1987-09-01), Pham Van Cang

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