[net.info-terms] Bug in vt100 terminals and C. Itoh lookalikes

ssimpson@trwrba.UUCP (Scott W. Simpson) (09/21/85)

I have found a bug (or bizzare feature) in the firmware for DEC vt100
and C. Itoh cit-101 and cit-101e terminals when wrap-around is set.  If
you type the string "ab" in the 80th column of the terminal the 'a'
comes out on the end of one line and the 'b' correctly comes out in the
first column of the next line.  However, if you type "a\t" where '\t'
is the tab character, the tab is ignored.  This seems to confuse
curses(3) which correctly assumes the tab will not be ignored.  I
suspect that vi(1) also gets confused with this problem when lines
greater than the width of the screen are edited.
-- 
		Scott Simpson
		TRW Electronics and Defense Sector
		...{decvax,ihnp4,ucbvax,ucivax}!trwrb!simpson

gwyn@brl-tgr.ARPA (Doug Gwyn <gwyn>) (09/25/85)

That is not a "bug" but a deliberate design feature of the VT-100.

A proper termcap entry for the VT-100 will not specify "am".
I have posted such a termcap entry several times.