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137. (US4404629) Data processing system with latch for sharing instruction fields

Application Number: 06228441 Application Date: 26.01.1981
Publication Number: 4404629 Publication Date: 13.09.1983
Grant Number: 4404629 Grant Date: 13.09.1983
Publication Kind : A
IPC:
G06F 9/22
G06F 9/26
G PHYSICS
06
COMPUTING; CALCULATING; COUNTING
F
ELECTRIC DIGITAL DATA PROCESSING
9
Arrangements for programme control, e.g. control unit
06
using stored programme, i.e. using internal store of processing equipment to receive and retain programme
22
Micro-control or micro-programme arrangements
G PHYSICS
06
COMPUTING; CALCULATING; COUNTING
F
ELECTRIC DIGITAL DATA PROCESSING
9
Arrangements for programme control, e.g. control unit
06
using stored programme, i.e. using internal store of processing equipment to receive and retain programme
22
Micro-control or micro-programme arrangements
26
Address formation of the next micro-instruction
CPC:

Applicants: Atari, Inc.
Inventors: Albaugh Michael E.
Agents: Townsend and Townsend
Priority Data:
Title: (EN) Data processing system with latch for sharing instruction fields
Abstract: front page image
(EN)

A microprocessor, having a memory element containing a plurality of multi-bit instruction words, an arithmetic logic (ALU) unit coupled to the memory element and responsive to at least a portion of each of the instruction words for performing data manipulations, and a controller for generating address signals that are communicated to the memory element to cause sequential access of the instruction words, includes a storage element that interconnects certain of the signal lines that communicate the instruction words to the ALU to the controller. In response to a first predetermined instruction word the storage element receives and stores the portion of the instruction word being conducted to the ALU. In response to a second predetermined instruction word, the content of the storage element is transferred to the controller to form an address signal.