Boots – shoes – and leggings
Patent
1977-02-22
1980-09-23
Chapnick, Melvin B.
Boots, shoes, and leggings
G06F 304, G06F 906
Patent
active
042246652
ABSTRACT:
A Computer system which includes a central processing unit, a central memory storage unit and a plurality of peripheral devices, the central processing unit having a control unit for dividing single complete input/output instructions for the transfer of data within the system into a sequence of discrete, separately executable, time independent operation instructions under the control of a microprogram. The system further includes peripheral device control units for the control of the independent execution of the discrete divided input/output (I/O) operation instructions. A microprogram command line is connected to the control unit in the central processing unit for controlling the output of the discrete I/O operation instructions along the system bus. An interruption request unit is also included within each of the peripheral device control units for generating an interrupt in the central processing unit after the termination of an operation instruction, both to permit the updated status of instructions to be recorded and to indicate the availability of a specific I/O device for further use. After the control unit in the central processing unit divides single complete input/output instructions into a plurality of separate operation instructions for operation steps which relate to particular functional characteristics of the peripheral devices in the system, the peripheral device control units control the individual execution of each separate operation in a specific sequence but independently of each other in time within that sequence. The individual data operations are transferred over the bus of the system.
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Cramwinckel Hans
De Bijl Adrianus M. J.
Briody Thomas A.
Cannon, Jr. James J.
Chapnick Melvin B.
Oisher Jack
U.S. Philips Corporation
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