公开(公告)号：US3603966A

公开(公告)日：1971-09-07

申请号：US3603966D

申请日：1969-02-14

Applicant: BUNKER RAMO

Inventor： GREGG ROLAND S JR ,  HOEGEMAN HERMAN F JR

IPC: G06F3/14 ,  G06F3/02 ,  G09G5/32

CPC classification number: G06F3/02

Abstract: A CRT data display system is provided with means for entering a character in memory for display in any position indicated by a cursor signal. Once a character has been entered, the cursor is automatically moved to the next character position in memory and displayed. The cursor may also be moved without entering a character. Character display is by a dot matrix such that n strokes are required to display a character and an additional stroke is required to provide an intercharacter space. The CRT beam is blanked during the additional stroke. The cursor signal is stored in a memory location read during the additional stroke period just preceding the position into which a character may be entered. Apparatus responds to the cursor signal a fraction of the time as the displayed data is repeatedly read for CRT regeneration, thereby displaying a blinking cursor. The cursor is displayed as a block in the character position accessible for entry, all without obliterating any character that may be present in that position.