Boots – shoes – and leggings
Patent
1978-10-23
1981-02-17
Chapnick, Melvin B.
Boots, shoes, and leggings
G06F 932
Patent
active
042518601
ABSTRACT:
Virtual addressing apparatus for implementing a large virtual address in a computer system having narrow data paths, ALU, and local storage register arrays without requiring multiple passes. The virtual addressing apparatus stores the segment portion of a virtual address in a segment register and the offset portion of the virtual address in an offset register. To form a new virtual address, a new offset value is obtained by adding the displacement value given by the instruction in the instruction buffer register to the offset value stored in the offset register. The segment portion of the virtual address does not participate in the arithmetic operation for forming the new virtual address. The segment and offset portions are concatenated to form the new virtual address which is then translated to a main store address. Overflow detection circuitry in the ALU detects if an overflow out of the offset occurs as a result of the ALU operation for obtaining the new offset value. If an overflow is detected during the calculation of the new offset value, translation of the virtual address is subsequently aborted.
REFERENCES:
patent: 3454934 (1969-07-01), Bahrs et al.
patent: 3461433 (1969-08-01), Emerson
patent: 3614746 (1971-10-01), Klinkhamer
patent: 3725874 (1973-04-01), Van Heel
patent: 3731283 (1973-05-01), Carlson et al.
patent: 3764996 (1973-10-01), Ross
patent: 3787813 (1974-01-01), Cole et al.
patent: 3818460 (1974-06-01), Beard et al.
patent: 3938096 (1976-02-01), Brown et al.
patent: 3949378 (1976-04-01), Crabb et al.
patent: 4054945 (1977-10-01), Ichiko et al.
patent: 4092715 (1978-05-01), Scriver
patent: 4145738 (1979-03-01), Inoue et al.
Koch, "Block Address Scheme Based on Associative Memory Blocks" in IBM Technical Disclosure Bulletin, vol. 15, No. 10, Mar. 1973, pp. 3088-3090.
Hoffman Roy L.
Mitchell Glen R.
Soltis Frank G.
Chapnick Melvin B.
International Business Machines - Corporation
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