Boots – shoes – and leggings
Patent
1978-06-29
1982-03-16
Zache, Raulfe B.
Boots, shoes, and leggings
G06F 1516
Patent
active
043204520
ABSTRACT:
The digital bus is an asynchronous, linear, open-ended digital bus which is coupled to two or more computer/controllers. The bus includes address control circuit lines comprising a bus busy line used by a controller to assert a bus busy signal thereon to gain control of the bus, and to determine if another computer/controller is using the bus, a receiver computer/controller request line used by a controller for requesting permission to send data to another controller, and a receiver computer/controller ready line used by a controller for indicating that that controller is ready to receive data. Data control circuit lines are also provided comprising a data ready line used by a controller for placing a ready-to-send-data signal thereon and a data accept line used by a controller for placing a ready-to-accept-data signal thereon. Also, address bus circuit lines are provided comprising five binary address lines used by a controller for placing an address thereon, which address can have up to five bits. The bus further includes sixteen data bus circuit lines coupled to the two or more controllers. Data to be transferred by a controller is placed on the data circuit lines. A voltage source is coupled to the digital bus lines for pulling up the voltage on all the digital bus lines to the voltage level of the voltage source to make certain that clear signals are provided on the bus and noise problems are avoided. The controllers use the digital bus to asynchronously transfer data and to resolve contention problems between different controllers when they try to gain control of the bus at the same time.
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Kempf Mark F.
Randall D'Arcy C.
Walworth Timothy R.
Magidson William H.
McClain William T.
Standard Oil Company (Indiana)
Vigil Thomas R.
Zache Raulfe B.
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