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JPS5640946A - Reading device of magnetic recording medium - Google Patents

Reading device of magnetic recording medium

Info

Publication number
JPS5640946A
JPS5640946A JP11777079A JP11777079A JPS5640946A JP S5640946 A JPS5640946 A JP S5640946A JP 11777079 A JP11777079 A JP 11777079A JP 11777079 A JP11777079 A JP 11777079A JP S5640946 A JPS5640946 A JP S5640946A
Authority
JP
Japan
Prior art keywords
reading
cpu
delivered
data
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
JP11777079A
Other versions
JPS6027413B2 (en
Inventor
Terukazu Tsukagoshi
Original Assignee
Omron Tateisi Electronics Co
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 Omron Tateisi Electronics Co filed Critical Omron Tateisi Electronics Co
Priority to JP54117770A priority Critical patent/JPS6027413B2/ja
Publication of JPS5640946A publication Critical patent/JPS5640946A/en
Publication of JPS6027413B2 publication Critical patent/JPS6027413B2/ja
Application status is Expired legal-status Critical

Links

Abstract

PURPOSE: To reduce the time of occupation of the CPU for reading, by delivering the DMA request every time the data recorded on the magnetic card is read by n bits via the reading control flag part and the shift register and then transferring the data to the memory.
CONSTITUTION: The information recorded on the magnetic card is read by the magnetic head 11 of the card reader and then supplied by a bit to the shift register 22 consisting of 8 bits as well as to the 1-bit reading control flag 21 after the demodulation at the demodulating circuit 14 via the amplifier 12. Before reading, the reading control flag is set to 1 by the command given from the CPU, and the register 22 is reset. Thus 1 is delivered from the flag detecting circuit 23 when the data of 8 bits is read, and then the memory access DMA request signal (DRQ) is delivered directly. When the signal DRQ is supplied to the DMA control circuit 32, the holding signal is delivered to the CPU. And the confirmation signal is delivered from the CPU. After this, the memory 33 is released from the CPU31, and the bus is occupied by the circuit 32. Then the data is transferred to the memory 33 from the reading gate 25.
COPYRIGHT: (C)1981,JPO&Japio
JP54117770A 1979-09-12 1979-09-12 Expired JPS6027413B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54117770A JPS6027413B2 (en) 1979-09-12 1979-09-12

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54117770A JPS6027413B2 (en) 1979-09-12 1979-09-12

Publications (2)

Publication Number Publication Date
JPS5640946A true JPS5640946A (en) 1981-04-17
JPS6027413B2 JPS6027413B2 (en) 1985-06-28

Family

ID=14719884

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54117770A Expired JPS6027413B2 (en) 1979-09-12 1979-09-12

Country Status (1)

Country Link
JP (1) JPS6027413B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58217040A (en) * 1982-06-10 1983-12-16 Fujitsu Kiden Ltd Data transfer system
JPS59168580A (en) * 1983-03-16 1984-09-22 Omron Tateisi Electronics Co Card reading system
JPS6044268U (en) * 1983-09-01 1985-03-28
JPS60123968A (en) * 1983-12-09 1985-07-02 Fujitsu Ltd Magnetic card reader
DE19823065A1 (en) * 1998-05-22 1999-11-25 Siemens Nixdorf Inf Syst Binary information evaluation system for magnetic memory card

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58217040A (en) * 1982-06-10 1983-12-16 Fujitsu Kiden Ltd Data transfer system
JPS59168580A (en) * 1983-03-16 1984-09-22 Omron Tateisi Electronics Co Card reading system
JPS6044268U (en) * 1983-09-01 1985-03-28
JPH0514359Y2 (en) * 1983-09-01 1993-04-16
JPS60123968A (en) * 1983-12-09 1985-07-02 Fujitsu Ltd Magnetic card reader
DE19823065A1 (en) * 1998-05-22 1999-11-25 Siemens Nixdorf Inf Syst Binary information evaluation system for magnetic memory card
WO1999062065A1 (en) * 1998-05-22 1999-12-02 Siemens Nixdorf Retail And Banking Systems Gmbh Evaluation of binary data using a dma unit

Also Published As

Publication number Publication date
JPS6027413B2 (en) 1985-06-28

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