JPS5582362A - Operation processing unit - Google Patents

Operation processing unit

Info

Publication number
JPS5582362A
JPS5582362A JP15782478A JP15782478A JPS5582362A JP S5582362 A JPS5582362 A JP S5582362A JP 15782478 A JP15782478 A JP 15782478A JP 15782478 A JP15782478 A JP 15782478A JP S5582362 A JPS5582362 A JP S5582362A
Authority
JP
Japan
Prior art keywords
circuit
signal
cpu
ram
clock
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.)
Granted
Application number
JP15782478A
Other languages
Japanese (ja)
Other versions
JPS6253834B2 (en
Inventor
Tsuguji Tateuchi
Shigeru Hirahata
Teruhiro Takezawa
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP15782478A priority Critical patent/JPS5582362A/en
Priority to DE2922540A priority patent/DE2922540C2/en
Priority to US06/044,379 priority patent/US4298931A/en
Publication of JPS5582362A publication Critical patent/JPS5582362A/en
Publication of JPS6253834B2 publication Critical patent/JPS6253834B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Digital Computer Display Output (AREA)

Abstract

PURPOSE: To access freely two-system RAMs at a high speed without special CPU and RAM and restriction on program generation.
CONSTITUTION: An address switch circuit which supplies a ROM and a RAM, where data is stored, to central operation processing circuit CPU alternately according to least significant address signals and clock generation circuit 4 which supplies clock signals to signals, which are supplied to the circuit above to switch the ROM and the RAM, and a CPU are provided. Fundamental clock signal d from an oscillator circuit is inputted to this clock generation circuit 4, and ROM/RAM switching signal c is generated by FF21, and further, least signal significant address signal e of the address signal from CPU is compared with signal c by exclsive OR circuit 23, and OR between the output of circuit 23 and clock signal b is operated by OR circuit 24, and fundamental clock signal d is gated by gate circuit 25 according to the output of circuit 24, and FF22 is operated to output clocks a and b to be supplied to CPU.
COPYRIGHT: (C)1980,JPO&Japio
JP15782478A 1978-06-02 1978-12-18 Operation processing unit Granted JPS5582362A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP15782478A JPS5582362A (en) 1978-12-18 1978-12-18 Operation processing unit
DE2922540A DE2922540C2 (en) 1978-06-02 1979-06-01 Data processing system
US06/044,379 US4298931A (en) 1978-06-02 1979-06-01 Character pattern display system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15782478A JPS5582362A (en) 1978-12-18 1978-12-18 Operation processing unit

Publications (2)

Publication Number Publication Date
JPS5582362A true JPS5582362A (en) 1980-06-21
JPS6253834B2 JPS6253834B2 (en) 1987-11-12

Family

ID=15658105

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15782478A Granted JPS5582362A (en) 1978-06-02 1978-12-18 Operation processing unit

Country Status (1)

Country Link
JP (1) JPS5582362A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS588348A (en) * 1981-07-07 1983-01-18 Sony Corp Microcomputer
JPS58208845A (en) * 1982-05-31 1983-12-05 Toshiba Corp Overlap display system
JPS63236083A (en) * 1987-03-25 1988-09-30 株式会社東芝 Image display system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5391533A (en) * 1977-01-22 1978-08-11 Hitachi Ltd Time-division control system of refresh memory
JPS53139275A (en) * 1977-05-11 1978-12-05 Hitachi Ltd Dehumidifying device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5391533A (en) * 1977-01-22 1978-08-11 Hitachi Ltd Time-division control system of refresh memory
JPS53139275A (en) * 1977-05-11 1978-12-05 Hitachi Ltd Dehumidifying device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS588348A (en) * 1981-07-07 1983-01-18 Sony Corp Microcomputer
JPH0377530B2 (en) * 1981-07-07 1991-12-10 Sony Corp
JPS58208845A (en) * 1982-05-31 1983-12-05 Toshiba Corp Overlap display system
JPH0373897B2 (en) * 1982-05-31 1991-11-25
JPS63236083A (en) * 1987-03-25 1988-09-30 株式会社東芝 Image display system

Also Published As

Publication number Publication date
JPS6253834B2 (en) 1987-11-12

Similar Documents

Publication Publication Date Title
JPS51139247A (en) Mos logic circuit
JPS55137763A (en) Facsimile unit
JPS5537623A (en) Sequence programmer
JPS5582362A (en) Operation processing unit
JPS5322340A (en) Microprogram system
JPS5563446A (en) Clock control system in board inspection
JPS5242031A (en) Information processing unit
JPS5269520A (en) Mode switching unit
JPS5374857A (en) Data processor
JPS533122A (en) Input unit
JPS5369557A (en) Data processor
JPS5533230A (en) Microinstruction generator
JPS5394836A (en) Data process system
JPS5360134A (en) Microprogram control device
JPS5377140A (en) Typewriter
JPS5518718A (en) Interruption system for specific program
JPS5330243A (en) Arithmetic processor
JPS53115148A (en) Interruption control system
JPS53103335A (en) Logic arithmetic circuit
JPS549543A (en) Signal processing system
JPS52153344A (en) Arithmetic display unit
JPS5347237A (en) Generation of oblique scan address
JPS52141533A (en) Arithmetic system
JPS52131131A (en) Load selection breaking system
JPS5263042A (en) Electronic computer