JPS52146134A - Rom write-in unit - Google Patents

Rom write-in unit

Info

Publication number
JPS52146134A
JPS52146134A JP6229876A JP6229876A JPS52146134A JP S52146134 A JPS52146134 A JP S52146134A JP 6229876 A JP6229876 A JP 6229876A JP 6229876 A JP6229876 A JP 6229876A JP S52146134 A JPS52146134 A JP S52146134A
Authority
JP
Japan
Prior art keywords
unit
rom write
checking
reading
write
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
JP6229876A
Other languages
Japanese (ja)
Inventor
Kikuo Nakazawa
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 JP6229876A priority Critical patent/JPS52146134A/en
Publication of JPS52146134A publication Critical patent/JPS52146134A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
    • G11C7/24—Memory cell safety or protection circuits, e.g. arrangements for preventing inadvertent reading or writing; Status cells; Test cells

Landscapes

  • Read Only Memory (AREA)
  • For Increasing The Reliability Of Semiconductor Memories (AREA)

Abstract

PURPOSE:To detect the readout error which is not detected by the parity check, by providing the buffer memory BM for checking, reading in the tape content into the checking BM once, and reading in it in the writing in BM twice and comparing the both.
JP6229876A 1976-05-31 1976-05-31 Rom write-in unit Pending JPS52146134A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6229876A JPS52146134A (en) 1976-05-31 1976-05-31 Rom write-in unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6229876A JPS52146134A (en) 1976-05-31 1976-05-31 Rom write-in unit

Publications (1)

Publication Number Publication Date
JPS52146134A true JPS52146134A (en) 1977-12-05

Family

ID=13196063

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6229876A Pending JPS52146134A (en) 1976-05-31 1976-05-31 Rom write-in unit

Country Status (1)

Country Link
JP (1) JPS52146134A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1980001854A1 (en) * 1979-03-01 1980-09-04 Y Kuze Photoelectric write-only sequence controller

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1980001854A1 (en) * 1979-03-01 1980-09-04 Y Kuze Photoelectric write-only sequence controller

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