JPS5561855A - Level control system - Google Patents

Level control system

Info

Publication number
JPS5561855A
JPS5561855A JP13407078A JP13407078A JPS5561855A JP S5561855 A JPS5561855 A JP S5561855A JP 13407078 A JP13407078 A JP 13407078A JP 13407078 A JP13407078 A JP 13407078A JP S5561855 A JPS5561855 A JP S5561855A
Authority
JP
Japan
Prior art keywords
selection
area
stack pointer
level
accessing
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
JP13407078A
Other languages
Japanese (ja)
Inventor
Kazumasa Okawa
Makoto Shinooka
Yutaka Daidoji
Yoshio Yoshiura
Naoyoshi Minoda
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.)
Fujitsu Ltd
Hitachi Ltd
NEC Corp
Nippon Telegraph and Telephone Corp
Oki Electric Industry Co Ltd
Original Assignee
Fujitsu Ltd
Hitachi Ltd
NEC Corp
Nippon Telegraph and Telephone Corp
Oki Electric Industry Co Ltd
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 Fujitsu Ltd, Hitachi Ltd, NEC Corp, Nippon Telegraph and Telephone Corp, Oki Electric Industry Co Ltd, Nippon Electric Co Ltd filed Critical Fujitsu Ltd
Priority to JP13407078A priority Critical patent/JPS5561855A/en
Publication of JPS5561855A publication Critical patent/JPS5561855A/en
Pending legal-status Critical Current

Links

Landscapes

  • Executing Machine-Instructions (AREA)

Abstract

PURPOSE: To enable data reception and giving between different program level easily and in high speed, by providing the level control circuit, in the data processor having a plurality of program running levels.
CONSTITUTION: The level control circuit 17 receives the selection signal from the status information circuit 16 or the level selection instruction, the stack pointer is referenced according to the cause of selection, the register group 14 and the work area stack pointer are respectively shunted in the shunt area and jumped to the address represented in the level selection cause jump area to renew the stack pointer. Further, when accessing is made to the work ares used by the program before the selection by instruction, the stack pointer is returned to the state before the selection with the circuit 17, the shut area is accessed from the content, and accessing is made to the area used by the program before selection from the result of accessing.
COPYRIGHT: (C)1980,JPO&Japio
JP13407078A 1978-10-31 1978-10-31 Level control system Pending JPS5561855A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13407078A JPS5561855A (en) 1978-10-31 1978-10-31 Level control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13407078A JPS5561855A (en) 1978-10-31 1978-10-31 Level control system

Publications (1)

Publication Number Publication Date
JPS5561855A true JPS5561855A (en) 1980-05-09

Family

ID=15119667

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13407078A Pending JPS5561855A (en) 1978-10-31 1978-10-31 Level control system

Country Status (1)

Country Link
JP (1) JPS5561855A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0283740A (en) * 1988-09-21 1990-03-23 Matsushita Electric Ind Co Ltd Operating system
JPH04245337A (en) * 1991-01-31 1992-09-01 Nec Ic Microcomput Syst Ltd Microprocessor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0283740A (en) * 1988-09-21 1990-03-23 Matsushita Electric Ind Co Ltd Operating system
JPH04245337A (en) * 1991-01-31 1992-09-01 Nec Ic Microcomput Syst Ltd Microprocessor

Similar Documents

Publication Publication Date Title
JPS5561855A (en) Level control system
JPS55154635A (en) Data processor
JPS5676865A (en) Microprocessor system
JPS5325779A (en) Speed operating method in numeric control unit
JPS5617450A (en) Data collection system
JPS54108539A (en) Virtual memory control system of information processor
JPS57125427A (en) Circuit for transmitting simultaneously command signal
JPS55115159A (en) Information processing unit
JPS5580163A (en) Calculation unit for appreciation of computer system
JPS5328350A (en) Rerformance data collection/control system
JPS5515526A (en) Microprogram control circuit
JPS5696336A (en) Processing system for multilayer level microprogram
JPS5447455A (en) Data processor
JPS5658196A (en) Memory device having memory part for test
JPS5614358A (en) Operation log storing system
JPS57159348A (en) Microprogram control system
JPS54129934A (en) Data access control system
JPS5566013A (en) Data processing unit having interrupt function
JPS5682961A (en) Memory control system
JPS54102928A (en) Data reading out control system
JPS5475243A (en) Interrupt processing system
JPS5553724A (en) Subchannel access system
JPS55150048A (en) Information processor
JPS5647842A (en) Microprogram control system
JPS5668846A (en) Access system for control memory device