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CSI DECSED and ED


From: Bryan Christ
Subject: CSI DECSED and ED
Date: Mon, 5 Aug 2019 16:59:30 -0500

Can anyone tell me what the correct behavior for this CSI when the cursor is in the middle of the row (let's say col 20 for example) and the modifier (Ps) is "1"... The xterm documentation says "Selective Erase Above".  I am currently coding my emulator so that the first part of the current row (everything left of the cursor) is cleared and all the lines above it.  That seems to be the behavior that "vttest" expects but am looking for clarification.  If so, then does the opposite apply for modifier 0?  (in another words, everything to the right and below?)

--
Bryan
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