JPS5696350A - Memory extension system - Google Patents

Memory extension system

Info

Publication number
JPS5696350A
JPS5696350A JP17342179A JP17342179A JPS5696350A JP S5696350 A JPS5696350 A JP S5696350A JP 17342179 A JP17342179 A JP 17342179A JP 17342179 A JP17342179 A JP 17342179A JP S5696350 A JPS5696350 A JP S5696350A
Authority
JP
Japan
Prior art keywords
address
stages
signal
cpu11
address signal
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
JP17342179A
Other languages
Japanese (ja)
Other versions
JPH0246970B2 (en
Inventor
Takashi Ogawa
Tamotsu 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.)
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 JP17342179A priority Critical patent/JPH0246970B2/en
Publication of JPS5696350A publication Critical patent/JPS5696350A/en
Publication of JPH0246970B2 publication Critical patent/JPH0246970B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE: To extend the memory without setting the address line, by using a part of the address signal to switch stages, in the system which switches stages selectively and accesses them.
CONSTITUTION: The address signal and the data signal from CPU11 are given to stages through the data bus and the address bus. The address signal is branched from the address bus and is input to stage select signal generating circuit 20. Since the stage select part is given to a part of the address signal from CPU11, this specific address signal is output by stage select signal generating circuit 20. By this signal, stages are switched, and prescribed or arbitrary address data is fetched into CPU11. Consequently, the number of stages is increased, and the memory is extended to any degree if stages are switched successively according to program contents.
COPYRIGHT: (C)1981,JPO&Japio
JP17342179A 1979-12-28 1979-12-28 MEMORIKA KUCHOHOSHIKI Expired - Lifetime JPH0246970B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17342179A JPH0246970B2 (en) 1979-12-28 1979-12-28 MEMORIKA KUCHOHOSHIKI

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17342179A JPH0246970B2 (en) 1979-12-28 1979-12-28 MEMORIKA KUCHOHOSHIKI

Publications (2)

Publication Number Publication Date
JPS5696350A true JPS5696350A (en) 1981-08-04
JPH0246970B2 JPH0246970B2 (en) 1990-10-18

Family

ID=15960129

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17342179A Expired - Lifetime JPH0246970B2 (en) 1979-12-28 1979-12-28 MEMORIKA KUCHOHOSHIKI

Country Status (1)

Country Link
JP (1) JPH0246970B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59112352A (en) * 1981-05-07 1984-06-28 アタリ・インコ−ポレ−テツド Cartridge
JPS59208663A (en) * 1983-05-12 1984-11-27 Konami Kogyo Kk Method and apparatus for expanding number of addresses of read-only memory
JPS59208662A (en) * 1983-05-12 1984-11-27 Konami Kogyo Kk Circuit expanding number of addresses of read-only memory
JPS6394346A (en) * 1986-10-09 1988-04-25 Nec Corp Control system for switching bank memory
JPH03211641A (en) * 1990-01-17 1991-09-17 Nec Corp Address designation method for memory device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59112352A (en) * 1981-05-07 1984-06-28 アタリ・インコ−ポレ−テツド Cartridge
JPS59208663A (en) * 1983-05-12 1984-11-27 Konami Kogyo Kk Method and apparatus for expanding number of addresses of read-only memory
JPS59208662A (en) * 1983-05-12 1984-11-27 Konami Kogyo Kk Circuit expanding number of addresses of read-only memory
JPS6394346A (en) * 1986-10-09 1988-04-25 Nec Corp Control system for switching bank memory
JPH03211641A (en) * 1990-01-17 1991-09-17 Nec Corp Address designation method for memory device

Also Published As

Publication number Publication date
JPH0246970B2 (en) 1990-10-18

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