Boots – shoes – and leggings
Patent
1981-09-15
1984-08-14
Heckler, Thomas M.
Boots, shoes, and leggings
G06F 700
Patent
active
044660570
ABSTRACT:
A system for modifying the manner in which a processor in a digital computer system responds to operation codes in certain instructions. All instructions to which the system responds have operation code syllables containing an operation code and an operation code modifier. In instructions having certain operation codes, the operation code modifier contains a value which modifies the manner in which the processor responds to the operation code. When the processor receives an instruction having such an operation code, a part of the processor which is responsive to the operation code modifier employs the value in the operation code modifier to modify the interpretation of the instruction by the processor. The manner in which the value is employed depends on the operation code. Several uses of the operation code modifier are disclosed. It is used in instructions which have varying numbers of operands to specify the number of operands; it is further used in a branch instruction to calculate the new program value; it is finally used in instructions in which the operation code specifies a set of related operations to specify one operation in the set.
REFERENCES:
patent: 3422404 (1969-01-01), Ferguson
patent: 4162519 (1979-07-01), Hanewinkel
patent: 4240142 (1980-12-01), Blahut et al.
Houseman David L.
Jones Thomas M.
Pilat John F.
Richmond Michael S.
Data General Corporation
Frank Jacob
Heckler Thomas M.
Nelson Gordon E.
Wall Joel
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