JPS56137449A - Data processor - Google Patents

Data processor

Info

Publication number
JPS56137449A
JPS56137449A JP4165080A JP4165080A JPS56137449A JP S56137449 A JPS56137449 A JP S56137449A JP 4165080 A JP4165080 A JP 4165080A JP 4165080 A JP4165080 A JP 4165080A JP S56137449 A JPS56137449 A JP S56137449A
Authority
JP
Japan
Prior art keywords
request
designation
buffers
programs
data processor
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
JP4165080A
Other languages
Japanese (ja)
Other versions
JPS642971B2 (en
Inventor
Jo Watanabe
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.)
CHIYOU LSI GIJUTSU KENKYU KUMIAI
CHO LSI GIJUTSU KENKYU KUMIAI
Original Assignee
CHIYOU LSI GIJUTSU KENKYU KUMIAI
CHO LSI GIJUTSU KENKYU KUMIAI
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 CHIYOU LSI GIJUTSU KENKYU KUMIAI, CHO LSI GIJUTSU KENKYU KUMIAI filed Critical CHIYOU LSI GIJUTSU KENKYU KUMIAI
Priority to JP4165080A priority Critical patent/JPS56137449A/en
Publication of JPS56137449A publication Critical patent/JPS56137449A/en
Publication of JPS642971B2 publication Critical patent/JPS642971B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/46—Multiprogramming arrangements
    • G06F9/461—Saving or restoring of program or task context

Abstract

PURPOSE:To realize the switching between programs with comparatively simple hardware, by separating the switching means between programs from the processor, in the data processor suitable for the microcomputer system. CONSTITUTION:When request strobe is incoming together with the request designation that is, this signal is at high level, the request designation (in this case, ''01'', ''10'', ''11'') is latched at the latch 10. At the same time, the monostable multivibrator 11 is operated with the request strobe and buffers 121, 122 are at high impedance state, and the addresses A9, A10 are temporarily at ''00'' with the pull down resistors 131, 132, and the master bank 2 is selected. When the output pulse of the monostable multivibrator 11 is finished, the buffers 121, 122 are ON, and control is transferred to the bank having the service program according to the request designation.
JP4165080A 1980-03-31 1980-03-31 Data processor Granted JPS56137449A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4165080A JPS56137449A (en) 1980-03-31 1980-03-31 Data processor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4165080A JPS56137449A (en) 1980-03-31 1980-03-31 Data processor

Publications (2)

Publication Number Publication Date
JPS56137449A true JPS56137449A (en) 1981-10-27
JPS642971B2 JPS642971B2 (en) 1989-01-19

Family

ID=12614223

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4165080A Granted JPS56137449A (en) 1980-03-31 1980-03-31 Data processor

Country Status (1)

Country Link
JP (1) JPS56137449A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01140255A (en) * 1987-11-26 1989-06-01 Matsushita Electric Ind Co Ltd Memory protecting method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01140255A (en) * 1987-11-26 1989-06-01 Matsushita Electric Ind Co Ltd Memory protecting method

Also Published As

Publication number Publication date
JPS642971B2 (en) 1989-01-19

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