JPS5541503A - Data buffer for input/output device - Google Patents

Data buffer for input/output device

Info

Publication number
JPS5541503A
JPS5541503A JP11357178A JP11357178A JPS5541503A JP S5541503 A JPS5541503 A JP S5541503A JP 11357178 A JP11357178 A JP 11357178A JP 11357178 A JP11357178 A JP 11357178A JP S5541503 A JPS5541503 A JP S5541503A
Authority
JP
Japan
Prior art keywords
input
rwm
address
written
latch
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
JP11357178A
Other languages
Japanese (ja)
Inventor
Yukio Watanabe
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 JP11357178A priority Critical patent/JPS5541503A/en
Publication of JPS5541503A publication Critical patent/JPS5541503A/en
Pending legal-status Critical Current

Links

Landscapes

  • Information Transfer Systems (AREA)

Abstract

PURPOSE: To obtain a circuit equivalent to a shift register by a read/write memory (RWM), a write/read circuit to this RWM and an I/O latch in a data buffer for I/O devices using a shift register function.
CONSTITUTION: When shift pulse 27 is applied, control decoder 10 outputs control signal 20 or 25, and input latch input 16 held in input latch 6 is written in RWM 7. Next, the value of address counter 9 is increased by 1, and the value of RWM 7 is read out to output latch 8. By reapeating this operation, a series of input data is written from address 0 to address N in the RWM because the address counter counts from 0 to N. When the address counter circulates once and returns to 0 again, data written first is read out, and next, input data is written from address 0 again, so that a shift register function can be obtained.
COPYRIGHT: (C)1980,JPO&Japio
JP11357178A 1978-09-18 1978-09-18 Data buffer for input/output device Pending JPS5541503A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11357178A JPS5541503A (en) 1978-09-18 1978-09-18 Data buffer for input/output device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11357178A JPS5541503A (en) 1978-09-18 1978-09-18 Data buffer for input/output device

Publications (1)

Publication Number Publication Date
JPS5541503A true JPS5541503A (en) 1980-03-24

Family

ID=14615611

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11357178A Pending JPS5541503A (en) 1978-09-18 1978-09-18 Data buffer for input/output device

Country Status (1)

Country Link
JP (1) JPS5541503A (en)

Similar Documents

Publication Publication Date Title
JPS5345120A (en) Video special effect device
JPS5528644A (en) Memory unit
JPS55134442A (en) Data transfer unit
JPS5447438A (en) Control system for scratch memory
JPS5541503A (en) Data buffer for input/output device
JPS5443630A (en) Memory access control system
JPS522330A (en) Data processig unit
JPS57167185A (en) Memory circuit
JPS5663628A (en) Data processing device
JPS5588126A (en) Data input system to electronic unit
JPS5538668A (en) Memory unit
JPS55122216A (en) Magnetic card read/write control unit
JPS5467179A (en) Control system
JPS56168267A (en) Logical device
JPS57193847A (en) Memory bank dividing circuit
JPS5690345A (en) External register write system
JPS57132229A (en) Direct memory access controller
JPS55102046A (en) Logic circuit
JPS5566042A (en) Memory control circuit
JPS5528142A (en) Control unit
JPS56168251A (en) Data transfer buffer system
JPS5557962A (en) Error detection system
JPS55135762A (en) Ic test unit
JPS5567985A (en) Information processor
JPS5430737A (en) Rule display system