Boots – shoes – and leggings
Patent
1979-08-22
1982-07-06
Springborn, Harvey E.
Boots, shoes, and leggings
G06F 922
Patent
active
043386628
ABSTRACT:
A microinstruction processing unit of the type in which microinstructions are fed and executed in a predetermined sequence to process data in a data processing system in which, upon the feeding of a higher priority microinstruction, the execution of a lower priority microinstruction is interrupted but is subsequently carried out. Microinstructions lower than the highest priority rank are supplied to control the transfer of data to and from a storage register and to and from a priority rank designated position in a register file. Upon the interruption by has higher priority ranking microinstruction, the data for an interrupted microinstruction remains in the register file but it is replaced in the storage register by data the higher priority ranking microinstruction. Signals representing the priority ranking of the interrupted microinstructions are stored in a stacking type previous level register and after an interruption, the signals from the previous level register are fed to a multiplexer to control the transfer of data from the register file to the storage register.
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Richard W. Watson, Timesharing System Design Concepts, (McGraw-Hill, 1970), Chapter 4, "Protection and Control", pp. 111-131.
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Nippon Electric Co. Ltd.
Springborn Harvey E.
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