JPS5750060A - Memory controlling circuit - Google Patents

Memory controlling circuit

Info

Publication number
JPS5750060A
JPS5750060A JP12578480A JP12578480A JPS5750060A JP S5750060 A JPS5750060 A JP S5750060A JP 12578480 A JP12578480 A JP 12578480A JP 12578480 A JP12578480 A JP 12578480A JP S5750060 A JPS5750060 A JP S5750060A
Authority
JP
Japan
Prior art keywords
memory
address
gate12
constitution
high speed
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
JP12578480A
Other languages
Japanese (ja)
Other versions
JPS6017131B2 (en
Inventor
Keizo Aoyanagi
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP12578480A priority Critical patent/JPS6017131B2/en
Publication of JPS5750060A publication Critical patent/JPS5750060A/en
Publication of JPS6017131B2 publication Critical patent/JPS6017131B2/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F12/00—Accessing, addressing or allocating within memory systems or architectures
    • G06F12/02—Addressing or allocation; Relocation
    • G06F12/06—Addressing a physical block of locations, e.g. base addressing, module addressing, memory dedication
    • G06F12/0615—Address space extension
    • G06F12/0623—Address space extension for memory modules

Abstract

PURPOSE:To execute a memory access exceeding a boundary of a memory address, by means of a few hardware and also at a high speed. CONSTITUTION:In a processing equipment provided with a memory by which an address is assigned in a byte unit, and a memory access is executed in a unit >=2 bytes, a memory address register inputs an end signal END1 to an AND gate 12 when the first memory cycle ends. It is discriminated by the AND gate12 that the memory access exceeds the address boundary. When an output of the gate12 become ''1'', an FF13 is set, the memory starts the second memory cycle by a memory starting circuit 15. According to this constitution, contents of the memory address register are returned to its initial value at a high speed without requiring a subtracter, etc., and also without executing a subtraction processing by a microprogram.
JP12578480A 1980-09-10 1980-09-10 memory control circuit Expired JPS6017131B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12578480A JPS6017131B2 (en) 1980-09-10 1980-09-10 memory control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12578480A JPS6017131B2 (en) 1980-09-10 1980-09-10 memory control circuit

Publications (2)

Publication Number Publication Date
JPS5750060A true JPS5750060A (en) 1982-03-24
JPS6017131B2 JPS6017131B2 (en) 1985-05-01

Family

ID=14918763

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12578480A Expired JPS6017131B2 (en) 1980-09-10 1980-09-10 memory control circuit

Country Status (1)

Country Link
JP (1) JPS6017131B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6019241A (en) * 1983-07-12 1985-01-31 Fujitsu Ltd Boundary error detecting system for assembler instruction
JPS62174842A (en) * 1986-01-29 1987-07-31 Hitachi Ltd Data processor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6364228U (en) * 1986-10-16 1988-04-27

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6019241A (en) * 1983-07-12 1985-01-31 Fujitsu Ltd Boundary error detecting system for assembler instruction
JPH0756632B2 (en) * 1983-07-12 1995-06-14 富士通株式会社 Assembler instruction boundary error detection processing method
JPS62174842A (en) * 1986-01-29 1987-07-31 Hitachi Ltd Data processor

Also Published As

Publication number Publication date
JPS6017131B2 (en) 1985-05-01

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