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JPS5663651A - Program control unit - Google Patents

Program control unit

Info

Publication number
JPS5663651A
JPS5663651A JP13772679A JP13772679A JPS5663651A JP S5663651 A JPS5663651 A JP S5663651A JP 13772679 A JP13772679 A JP 13772679A JP 13772679 A JP13772679 A JP 13772679A JP S5663651 A JPS5663651 A JP S5663651A
Authority
JP
Japan
Prior art keywords
instruction
circuit
constraint
exclusive
routine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP13772679A
Other languages
Japanese (ja)
Inventor
Toshio Suzuki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP13772679A priority Critical patent/JPS5663651A/en
Publication of JPS5663651A publication Critical patent/JPS5663651A/en
Pending legal-status Critical Current

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  • Advance Control (AREA)

Abstract

PURPOSE: To elevate a processing speed without putting a constraint to implementation of a routine, by constituting a program control device of the data processing unit so that the advance access of control memory can be executed by the expected value designated by the instruction.
CONSTITUTION: The circuit consisting of an exclusive "or" circuit 10 and FF 12 has a relative function by which the value (f) of the DS part standing for expectation, and the value of a signal (e) selected by the selector 8 are compared and output by dividing them into within and after the prescribed period of time. Also, when the jump instruction has been given, (EOR circuit) 13 and the AND circuit 7 output the control signals to the exclusive "or" circuit from the contents of the DS part and the relative contents. And the selector decides the instruction expecting the next execution, in accordance with the control signal, and not only executes to read, continue and halt the instruction, but also instructs to read the next instruction. In this way, the advance access of control memory can be executed by the expected value designated by the instrunction, and a processing speed can be elevated without putting a constraint to implementation of a routine.
COPYRIGHT: (C)1981,JPO&Japio
JP13772679A 1979-10-26 1979-10-26 Program control unit Pending JPS5663651A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13772679A JPS5663651A (en) 1979-10-26 1979-10-26 Program control unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13772679A JPS5663651A (en) 1979-10-26 1979-10-26 Program control unit

Publications (1)

Publication Number Publication Date
JPS5663651A true JPS5663651A (en) 1981-05-30

Family

ID=15205384

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13772679A Pending JPS5663651A (en) 1979-10-26 1979-10-26 Program control unit

Country Status (1)

Country Link
JP (1) JPS5663651A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58137048A (en) * 1982-02-08 1983-08-15 Nec Corp Branch instruction control system
JPS58149540A (en) * 1982-03-02 1983-09-05 Nec Corp Control storage device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5222841A (en) * 1975-08-15 1977-02-21 Hitachi Ltd Micro program control method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5222841A (en) * 1975-08-15 1977-02-21 Hitachi Ltd Micro program control method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58137048A (en) * 1982-02-08 1983-08-15 Nec Corp Branch instruction control system
JPS58149540A (en) * 1982-03-02 1983-09-05 Nec Corp Control storage device
JPS6235693B2 (en) * 1982-03-02 1987-08-03 Nippon Electric Co

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