JPS5538651A - Address extension mechanism - Google Patents

Address extension mechanism

Info

Publication number
JPS5538651A
JPS5538651A JP11072478A JP11072478A JPS5538651A JP S5538651 A JPS5538651 A JP S5538651A JP 11072478 A JP11072478 A JP 11072478A JP 11072478 A JP11072478 A JP 11072478A JP S5538651 A JPS5538651 A JP S5538651A
Authority
JP
Japan
Prior art keywords
address
register
space
gate
access
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
JP11072478A
Other languages
Japanese (ja)
Inventor
Masahisa Aonuma
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 JP11072478A priority Critical patent/JPS5538651A/en
Publication of JPS5538651A publication Critical patent/JPS5538651A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To extend addresses by attaining access to another logical address space by providing a special register which modifies the operand part of an instruction.
CONSTITUTION: When FF3 is set corresponding to an address command clock, an AND gate is opened to generate an address converted into a physical page address through a conversion map corresponding to a logical space number by address register 1 formed of a shift register. On the other hand, a corresponding AND gate is open by FF3 until FF3 is reset and then set next, and access to another space corresponding to B address register 2 modifying an operand part is attained, so that the extension of physical sddresses can be performed.
COPYRIGHT: (C)1980,JPO&Japio
JP11072478A 1978-09-11 1978-09-11 Address extension mechanism Pending JPS5538651A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11072478A JPS5538651A (en) 1978-09-11 1978-09-11 Address extension mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11072478A JPS5538651A (en) 1978-09-11 1978-09-11 Address extension mechanism

Publications (1)

Publication Number Publication Date
JPS5538651A true JPS5538651A (en) 1980-03-18

Family

ID=14542874

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11072478A Pending JPS5538651A (en) 1978-09-11 1978-09-11 Address extension mechanism

Country Status (1)

Country Link
JP (1) JPS5538651A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58201159A (en) * 1982-05-19 1983-11-22 Matsushita Electric Ind Co Ltd Address converter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58201159A (en) * 1982-05-19 1983-11-22 Matsushita Electric Ind Co Ltd Address converter
JPS6330654B2 (en) * 1982-05-19 1988-06-20 Matsushita Electric Ind Co Ltd

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