JPS55118165A - Data processor possessing extended memory - Google Patents

Data processor possessing extended memory

Info

Publication number
JPS55118165A
JPS55118165A JP2601479A JP2601479A JPS55118165A JP S55118165 A JPS55118165 A JP S55118165A JP 2601479 A JP2601479 A JP 2601479A JP 2601479 A JP2601479 A JP 2601479A JP S55118165 A JPS55118165 A JP S55118165A
Authority
JP
Japan
Prior art keywords
common
region
data processor
selection signal
extended memory
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
JP2601479A
Other languages
Japanese (ja)
Inventor
Tomohito Shibata
Masaaki Kobayashi
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP2601479A priority Critical patent/JPS55118165A/en
Publication of JPS55118165A publication Critical patent/JPS55118165A/en
Pending legal-status Critical Current

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Abstract

PURPOSE: To increase the capacity of the common region by supplying the selection signal for the data processor which extends the memory by means of the bank register and in case the access requester unit has the access to the common region.
CONSTITUTION: The order fetch signal given from CPU7 is decoded by memory access controller 10 to select one of register's extended common regions 6-0 and 6-1. The selection of the common regions is indicated by selection signal IFETCH, and thus the capacity can be made double for the common region. At the same time, the data to be used in common is stored within region 6-1 along with the resident program within region 6-0. As a result, the fetch signal can be used directly as the selection signal.
COPYRIGHT: (C)1980,JPO&Japio
JP2601479A 1979-03-06 1979-03-06 Data processor possessing extended memory Pending JPS55118165A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2601479A JPS55118165A (en) 1979-03-06 1979-03-06 Data processor possessing extended memory

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2601479A JPS55118165A (en) 1979-03-06 1979-03-06 Data processor possessing extended memory

Publications (1)

Publication Number Publication Date
JPS55118165A true JPS55118165A (en) 1980-09-10

Family

ID=12181830

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2601479A Pending JPS55118165A (en) 1979-03-06 1979-03-06 Data processor possessing extended memory

Country Status (1)

Country Link
JP (1) JPS55118165A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58137064A (en) * 1982-02-08 1983-08-15 Fujitsu Ltd Address extension system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58137064A (en) * 1982-02-08 1983-08-15 Fujitsu Ltd Address extension system

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