Microprocessor with branch control

Details Microprocessor with branch control Microprocessor with branch control

1983-03-31

1986-02-25

Zache, Raulfe B.

Boots, shoes, and leggings

G06F 900

Patent

active

045731187

ABSTRACT:
A microprocessor data processing system (1700) includes system units (50, 1704) connected to a bus (1702), with a bus arbiter (1712) and a protocol for assigning bus access to the system units (50, 1704). The microprocessor (50) executes both arithmetic operations and floating point operations. A microcontrol store (162) stores common instructions usable in different floating point operations. A PLA (180) supplies addresses to microcontrol store (162) and provides a signal indicating floating point instruction type. The microprocessor (50) includes a pending interrupt register (250) connected to mask and enable logic (268). The mask and enable logic (268) is connected to a priority encoder (278), which is connected to an interrupt latch (282). The latch (282) supplies outputs to generate a current state storage address. Branch control logic (1938) receives branch conditions inputs and branch control information and generates control signals for a next micro address multiplexer (1934) in a pipelined instruction path.

REFERENCES:
patent: 3943495 (1976-03-01), Garlic

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