Communications: electrical – Continuously variable indicating – With meter reading
Patent
1984-01-09
1986-12-16
Weldon, Ulysses
Communications: electrical
Continuously variable indicating
With meter reading
34082551, 364200, 371 71, H04Q 100, G06F 304
Patent
active
046300414
ABSTRACT:
Interrupt control apparatus in a data processing system for acknowledging on a priority basis one among several possible asynchronous interruptions (INT1, INTN), such apparatus comprising a priority network (5), a latching (7) and a validation circuit (11,12). The priority network directly receives on its input terminals the asynchronous interrupt signals and provides on its output terminals a binary code corresponding to the highest priority interrupt present on its input terminals. The interrupt code is latched in the register and is present on its output terminals. The code latched in the register is used by a validation circuit as a selection code of the related input interrupt signal. If such a signal is present, the code is validated, i.e., it is transferred to the central unit of the system. If the selected interrupt signal is not present, the code is not validated.
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patent: 3796992 (1974-03-01), Nakamura et al.
patent: 3944975 (1976-03-01), Yasumoto et al.
patent: 4001734 (1977-01-01), Bardotti
patent: 4034349 (1977-07-01), Monarco et al.
Patent Abstracts of Japan, vol. 6, No. 129 (p. 128) (1007), 15th Jul. 1982, Application No. 5755437 (Canon K. K.) 2/04/82.
Patent Abstracts of Japan, vol. 6, No. 129 (p. 128) (1007), 15th Jul. 1982 Application No. 5755437 (Canon K. K.) 02/04/1982.
Casamatta Angelo
Fossati Walter
Honeywell Information Systems Italia
Prasinos Nicholas
Smith Ralph
Solakian John S.
Weldon Ulysses
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