JPS5538619A - Read-after-write check circuit - Google Patents

Read-after-write check circuit

Info

Publication number
JPS5538619A
JPS5538619A JP10909978A JP10909978A JPS5538619A JP S5538619 A JPS5538619 A JP S5538619A JP 10909978 A JP10909978 A JP 10909978A JP 10909978 A JP10909978 A JP 10909978A JP S5538619 A JPS5538619 A JP S5538619A
Authority
JP
Japan
Prior art keywords
data
circuit
address
inputted
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.)
Pending
Application number
JP10909978A
Other languages
Japanese (ja)
Inventor
Hiroshi Murata
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP10909978A priority Critical patent/JPS5538619A/en
Publication of JPS5538619A publication Critical patent/JPS5538619A/en
Pending legal-status Critical Current

Links

Landscapes

  • Digital Magnetic Recording (AREA)

Abstract

PURPOSE: To lighten a burden of programing upon a microcomputer side and also to shorten check time by automatically making a check after a write to a magnetic medium not through the microcomputer.
CONSTITUTION: Read buffer setup signal Y10, when outputted, is latched in D-FF 15. At the timing of the output signal of this FF 15, data is outputted to data bus D1 and inputted to side A of data comparator circuit 11. At this time, it is compared with data inputted to side B and when A is equal to B, the output is latched by D-FF 14 and AND circuit 24 generates a clock for a count-up, thereby advancing the address of address counter 7 by one. On the other hand, when the address data in counter 7 is inputted to write data memory 9 through the change-over of address change-over circuit 8, the data is sent to bus D1. This is sent to data latch circuit 10 to prepare compared data. When signal Y10 is outputted again, the contents of data bus buffer 1 are compared with those of circuit 10 by circuit 11. This operation is repeated and when A differs from B, alarm interruption signal Y9 is sent out.
COPYRIGHT: (C)1980,JPO&Japio
JP10909978A 1978-09-07 1978-09-07 Read-after-write check circuit Pending JPS5538619A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10909978A JPS5538619A (en) 1978-09-07 1978-09-07 Read-after-write check circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10909978A JPS5538619A (en) 1978-09-07 1978-09-07 Read-after-write check circuit

Publications (1)

Publication Number Publication Date
JPS5538619A true JPS5538619A (en) 1980-03-18

Family

ID=14501548

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10909978A Pending JPS5538619A (en) 1978-09-07 1978-09-07 Read-after-write check circuit

Country Status (1)

Country Link
JP (1) JPS5538619A (en)

Similar Documents

Publication Publication Date Title
JPS56160157A (en) Bit clock reproducing circuit
JPS5466111A (en) Time code write system
JPS54143110A (en) Pcm signal tape cutting device
JPS55149084A (en) Clock apparatus
JPS5538619A (en) Read-after-write check circuit
JPS5443630A (en) Memory access control system
JPS5570997A (en) Error bit check system for read only memory
JPS5685130A (en) Rom access circuit
JPS567143A (en) Data converting circuit
JPS5690358A (en) Computer having programmable read-only memory
JPS5538668A (en) Memory unit
JPS5764396A (en) Multi-processor
JPS5641600A (en) Detection system for memory capacity
JPS54131831A (en) Memory unit
JPS5622292A (en) Memory element
JPS5453839A (en) Magnetic bubble memory
JPS52149049A (en) Unit price setting method and writing unit for electronic register
JPS57135496A (en) P-rom compensating circuit
JPS57158079A (en) Address control system
JPS51131237A (en) Electronic register
JPS5487029A (en) Information transfer system
JPS5534313A (en) Memory device
JPS6473437A (en) Memory write protection circuit
JPS5640952A (en) Microprogram control system
JPS554604A (en) Buffer register