Boots – shoes – and leggings
Patent
1984-08-24
1988-07-19
Harkcom, Gary V.
Boots, shoes, and leggings
G06F 1212
Patent
active
047589442
ABSTRACT:
A pointer, N, indicates an address in a virtual memory space of a demand paged memory including a plurality of virtual address pages and a fixed number of physical memory pages into which blocks of information can be written. A back-up memory store is provided for containing paged-out memory pages. The pointer, N, is advanced along the virtual address pages to indicate the next available virtual address page for allocation, and newly allocated blocks are located on the virtual address page pointed to by said pointer N. Should the necessary space for a block allocation not exist on the page pointed to by said pointer, N, a page which is most recently used and least sparsely utilized is identified from the physical pages onto which blocks have been previously written the block is allocated on that page. If no space remains on the virtual address pages in physical memory for block allocation, then, a least recently used and most sparsely allocated page is identified and paged-out to the back-up store.
REFERENCES:
patent: 3882470 (1975-05-01), Hunter
patent: 4121286 (1978-10-01), Venton et al.
patent: 4123795 (1978-10-01), Deem, Jr. et al.
patent: 4189773 (1980-02-01), O'Meara
patent: 4446516 (1984-05-01), Nishimura
Bartley David H.
McEntee Timothy J.
Oxley Donald W.
Demond Thomas W.
Harkcom Gary V.
Hill Kenneth C.
Lynt C. H.
Sharp Melvin
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