Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1987-10-07
1989-03-14
Curtis, Marshall M.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
340710, 340720, 340707, 273312, G09G 116
Patent
active
048128287
ABSTRACT:
A video display processor (VDP) is connectable to an input control device such as a light pen and a mouse. The VDP comprises a counter circuit which is composed of an X counter and a Y counter. When a mouse mode is selected, X and Y pulse signals are supplied to the X and Y counters so that the contents of the X and Y counters represent the amount of movement of the mouse. When a central processing unit (CPU) connected to the VDP reads the contents of the X and Y counters in this mouse mode, the X and Y counters are reset. When a light pen mode is selected, the X and Y counters effect a count operation of a clock signal generated in the VDP in synchronism with the display of image on a screen so that the contents of the X and Y counters represents X-Y coordinates of a display element which is currently displayed on the screen. The CPU reads the contents of the X and Y counters in response to a light detection signal outputted from the light pen thereby to input the X-Y coordinates of the display element selected by the light pen. In a collision detection mode, the counter circuit effects the same counting operation as that effected in the light pen mode. The CPU reads the contents of the X and Y counters in response to a collision detection signal, which is generated by an associated circuit when animation patterns of the video image displayed on the screen overlap, thereby to input the X-Y coordinates of the collision position.
REFERENCES:
patent: 3621214 (1971-11-01), Romney
patent: 3793481 (1974-02-01), Ripley et al.
patent: 4210329 (1980-07-01), Steiger et al.
patent: 4395045 (1983-07-01), Baer
The Lisa Computer System; Williams; Byte Publications; 2/83; pp. 33-50.
Lisa Draw; Apple Product #A6L0342; 1983, 1984; pp. 72-75 & 80-81.
Ishii Takatoshi
Nishi Kazuhiko
Okumura Takatoshi
Yamaoka Shigemitsu
Yamashita Ryozo
Ascii Corporation
Curtis Marshall M.
Nippon Gakki Seizo Kabushiki Kaisha
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