JPS567148A - Data processor - Google Patents

Data processor

Info

Publication number
JPS567148A
JPS567148A JP8225979A JP8225979A JPS567148A JP S567148 A JPS567148 A JP S567148A JP 8225979 A JP8225979 A JP 8225979A JP 8225979 A JP8225979 A JP 8225979A JP S567148 A JPS567148 A JP S567148A
Authority
JP
Japan
Prior art keywords
order
address
memory
program
register
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
JP8225979A
Other languages
Japanese (ja)
Inventor
Masamichi Koyama
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 JP8225979A priority Critical patent/JPS567148A/en
Publication of JPS567148A publication Critical patent/JPS567148A/en
Pending legal-status Critical Current

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Abstract

PURPOSE: To secure the use of part of the main program for the subroutine, by executing the order of the order memory means instead of the main program order when the program counter shows the order address of the order address memory means.
CONSTITUTION: The process of the program jumps to B from E-F and proceed to the processes at and after B. Then the order immediately before C is executed, and program counter 7 shows the address (1000) of order C as the memory address of the order to be executed next. Thus the coincidence is detected 9 for the contents between counter 7 and order address memory register 8 (storing address 1000 of order C), and selection circuit 4 selects the output of order memory register 3 by the coincidence output 13 and then reads it to order register 5. In such way, part B-C of the main program can be used for the subroutine without rewriting order C in memory 1.
COPYRIGHT: (C)1981,JPO&Japio
JP8225979A 1979-06-29 1979-06-29 Data processor Pending JPS567148A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8225979A JPS567148A (en) 1979-06-29 1979-06-29 Data processor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8225979A JPS567148A (en) 1979-06-29 1979-06-29 Data processor

Publications (1)

Publication Number Publication Date
JPS567148A true JPS567148A (en) 1981-01-24

Family

ID=13769450

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8225979A Pending JPS567148A (en) 1979-06-29 1979-06-29 Data processor

Country Status (1)

Country Link
JP (1) JPS567148A (en)

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