Electronic microprocessor system having two cycle branch logic

Details Electronic microprocessor system having two cycle branch logic Electronic microprocessor system having two cycle branch logic

1978-12-15

1981-09-01

Springborn, Harvey E.

Boots, shoes, and leggings

364900, G06F 926

Patent

active

042875595

ABSTRACT:
An integrated chip microprocessor system has a data memory for storing numeric data, an arithmetic unit for performing arithmetic operations on such data, an instruction memory for storing a plurality of instruction words, a program counter for addressing the instruction memory, and an instruction word decoder for decoding instruction words outputted from the instruction memory for controlling the operation of the microprocessor system. The instruction word decoder has a branch decoder system for implementing a two cycle branch logic. Each program branch operation, as stored in the instruction memory has two parts: a branch instruction word which indicates a program branch and also indicates the state of a selected one of a plurality of flag latches upon which it is conditioned; and a branch address instruction word solely indicative of the instruction memory address to which the program is to branch, the branch address instruction word being stored in the next memory location in the instruction memory following the branch instruction word. The branch decoder system determines when a branch instruction word is outputted from the instruction memory and also determines if the program branch is conditional or unconditional, and if the branch is conditional, the particular state of a selected flag latch upon which the branch is conditioned. If the branch is unconditioned, or if the branch is conditional and the condition satisfied, the branch decoder system inserts the branch address instruction word which is the next instruction word outputted from the instruction memory into the program counter.

REFERENCES:
patent: 3018956 (1962-01-01), Hosier et al.
patent: 3551895 (1970-12-01), Driscoll, Jr.
patent: 3670308 (1972-06-01), Tutelman
patent: 3764988 (1973-10-01), Omishi
patent: 3922538 (1975-11-01), Cochran et al.
patent: 4021656 (1977-05-01), Caudel et al.
patent: 4075687 (1978-02-01), Nissen et al.
patent: 4100606 (1978-07-01), Brantingham
patent: 4112495 (1978-09-01), Easly

Affiliated with

Also associated with

Rating

Electronic microprocessor system having two cycle branch logic does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electronic microprocessor system having two cycle branch logic, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electronic microprocessor system having two cycle branch logic will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1679077