Dual bus microcomputer system with programmable control of lock

Details Dual bus microcomputer system with programmable control of lock Dual bus microcomputer system with programmable control of lock

1989-05-31

1993-01-26

Fleming, Michael R.

Boots, shoes, and leggings

364DIG1, 3642281, 3642384, 3642408, 36424341, 36424342, 3642435, 3642686, G06F 900

Patent

active

051828090

ABSTRACT:
A dual bus microcomputer system including a cache subsystem improves performance under certain circumstances by allowing programmable control over the LOCK function. More particularly, additional logic is coupled between the LOCK output of the CPU and the LOCK input of the cache controller. A control bit from an I/O port is a second input to the additional logic. With the control bit in one state, the logic allows the LOCK input to follow the LOCK output. In the other state of the control bit, the LOCK input is disabled regardless of the state of the LOCK output.

REFERENCES:
patent: 4394727 (1983-07-01), Hoffman et al.
patent: 4432050 (1984-02-01), Harris et al.
patent: 4435766 (1984-05-01), Haber et al.
patent: 4488217 (1984-12-01), Binder et al.
patent: 4587609 (1986-01-01), Boudreau et al.
patent: 4590552 (1986-05-01), Guttag et al.
patent: 4665484 (1987-05-01), Nanba
patent: 4727486 (1988-02-01), Smith et al.
patent: 4949239 (1990-08-01), Gillett, Jr. et al.
patent: 4959860 (1990-09-01), Watters et al.
patent: 4984153 (1991-01-01), Kregness et al.
patent: 5041962 (1991-08-01), Lunsford
"80386 Hardware Reference Manual", Intel Corporation, 1986, Chapter 7-Cache Subsystems.
"Introduction to the 80386 including the 80386 Data Sheet", Intel Corporation, Apr. 1986.
"82385 High Performance 32-Bit Cache Controller", Intel Corporation, Jul. 1987.

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