JPS5567842A - Cursor control circuit - Google Patents

Cursor control circuit

Info

Publication number
JPS5567842A
JPS5567842A JP14099378A JP14099378A JPS5567842A JP S5567842 A JPS5567842 A JP S5567842A JP 14099378 A JP14099378 A JP 14099378A JP 14099378 A JP14099378 A JP 14099378A JP S5567842 A JPS5567842 A JP S5567842A
Authority
JP
Japan
Prior art keywords
raster
cursor
features
high level
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.)
Granted
Application number
JP14099378A
Other languages
Japanese (ja)
Other versions
JPS6148716B2 (en
Inventor
Yoji Nishio
Shigeaki Yoshida
Shigeo Kuboki
Masahiro Iwamura
Nagaharu Hamada
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 JP14099378A priority Critical patent/JPS5567842A/en
Publication of JPS5567842A publication Critical patent/JPS5567842A/en
Publication of JPS6148716B2 publication Critical patent/JPS6148716B2/ja
Granted legal-status Critical Current

Links

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  • Digital Computer Display Output (AREA)

Abstract

PURPOSE: To avoid occurrence of the cursor roller-screen phenomenon by delivering the coincidence signal regardless of the agreement or disagreement of the lowest-rank bit between the raster register of the cursor start and end and the raster address.
CONSTITUTION: The raster numbers, for example, "0" and "5" of the cursor start and end are set to registers 100 and 101 each, and each bit of them is compared with the raster address via gates 102W111. As signal 206 features a high level in the interlace scan mode, start raster coincidence signal 201 features a high level when the raster addresses are "0" and "1" each at the even and odd fields. While end raster coincidence signal 203 features a high level when the raster addresses are "4" and "5" each at the even and odd fields. As a result, cursor enable signal 205 can control the cursor display in order to prevent occurrence of the cursor roller- screen phenomenon.
COPYRIGHT: (C)1980,JPO&Japio
JP14099378A 1978-11-17 1978-11-17 Cursor control circuit Granted JPS5567842A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14099378A JPS5567842A (en) 1978-11-17 1978-11-17 Cursor control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14099378A JPS5567842A (en) 1978-11-17 1978-11-17 Cursor control circuit

Publications (2)

Publication Number Publication Date
JPS5567842A true JPS5567842A (en) 1980-05-22
JPS6148716B2 JPS6148716B2 (en) 1986-10-25

Family

ID=15281648

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14099378A Granted JPS5567842A (en) 1978-11-17 1978-11-17 Cursor control circuit

Country Status (1)

Country Link
JP (1) JPS5567842A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6095483A (en) * 1983-10-28 1985-05-28 横河電機株式会社 Grid display for crt

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6095483A (en) * 1983-10-28 1985-05-28 横河電機株式会社 Grid display for crt

Also Published As

Publication number Publication date
JPS6148716B2 (en) 1986-10-25

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