JPS5650441A - Data processing system - Google Patents

Data processing system

Info

Publication number
JPS5650441A
JPS5650441A JP12540679A JP12540679A JPS5650441A JP S5650441 A JPS5650441 A JP S5650441A JP 12540679 A JP12540679 A JP 12540679A JP 12540679 A JP12540679 A JP 12540679A JP S5650441 A JPS5650441 A JP S5650441A
Authority
JP
Japan
Prior art keywords
program
address
space
extended
instructions
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
JP12540679A
Other languages
Japanese (ja)
Inventor
Takahide Hayashi
Junichi Yamamoto
Masato Yamagishi
Sakae Hasegawa
Nobuyoshi Doumen
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 JP12540679A priority Critical patent/JPS5650441A/en
Publication of JPS5650441A publication Critical patent/JPS5650441A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To read out instruction words in the extended space by a program counter of no capacity, by causing the processor itself to store instruction words of an instruction group other than the normal instruction group in the extended address and to address instruction words by the address smaller than the extended address.
CONSTITUTION: Locations 0W64kW of the memory are used as basic address space 28, and locations 64W128kW are used as extended address space 29, and control program 30, decoding program 31, and a part of the beginning of object program 32 are stored in space 28. Program 32 is stored in space 29, and this program 32 is described with OI instructions 33 other than instructions of the data processor. These instructions 33 are decoded by decoding program 31 to make it possible that the processor itself executes them, and instruction words are addressed by the address smaller than the extended address and can be read out by the program counter.
COPYRIGHT: (C)1981,JPO&Japio
JP12540679A 1979-10-01 1979-10-01 Data processing system Pending JPS5650441A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12540679A JPS5650441A (en) 1979-10-01 1979-10-01 Data processing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12540679A JPS5650441A (en) 1979-10-01 1979-10-01 Data processing system

Publications (1)

Publication Number Publication Date
JPS5650441A true JPS5650441A (en) 1981-05-07

Family

ID=14909319

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12540679A Pending JPS5650441A (en) 1979-10-01 1979-10-01 Data processing system

Country Status (1)

Country Link
JP (1) JPS5650441A (en)

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