Jack Palevich's Chameleon terminal emulator with SUPDUP support.

Source code courtesy of Palevich, who comments:

  "My guess is that the SUPDUP code is a fork and extension of my
   original CHAMELEON terminal emulator.

   My guess is that either Leigh Klotz or Patrick Sobolvaro extended
   CHAMELEON to create SUPDUP. From looking over the source code, I
   see these changes from what I remember writing in Chameleon:
   + Using the paddle to scroll left/right. (I only supported using
     the yellow function keys to do this.)
   + Emulating SUPAI and IMLAC. (I had already added SUPDUP support to
     CHAMELEON.)
   + Removing emulation for ADM-3A."

Klotz and Sobolvaro don't remember any details.  They have given their
permission to release this, should that be necesssary.

LOGIN files suggest the ITS terminal settings should be:
:tctyp soft hei 24 wid 39 +%tosai +%tolid +%tocid full +%tprsc no overwrite

Makefile

@@ -34,7 +34,7 @@ SRC = syseng sysen1 sysen2 sysen3 sysnet kshack dragon channa	\
       mits_s rab stan_k bs cstacy kp dcp2 -pics- victor imlac rjl mb bh \
       lars drnil radia gjd maint bolio cent shrdlu vis cbf digest prs jsf \
       decus bsg muds54 hello rrs 2500 minsky danny survey librm3 librm4 \
-      klotz
+      klotz atlogo
 DOC = info _info_ sysdoc sysnet syshst kshack _teco_ emacs emacs1 c kcc \
       chprog sail draw wl pc tj6 share _glpr_ _xgpr_ inquir mudman system \
       xfont maxout ucode moon acount alan channa fonts games graphs humor \

build/misc.tcl

@@ -1638,6 +1638,14 @@ expect "Core used"
 respond "*" "\003"
 respond "*" ":kill\r"
 
+# Atari 800 terminal emulator Chameleon by Jack Palevich.
+respond "*" ":cwd atlogo\r"
+respond "*" ":cross\r"
+respond "*" "supdup,supdup=supdup/m65\r"
+expect "Core used"
+respond "*" "\003"
+respond "*" ":kill\r"
+
 # TENTH, toy Forth.
 respond "*" ":midas /t aap; ts tenth_tenth\r"
 respond "end input with ^C" "TS==1\r"

build/timestamps.txt

@@ -43,6 +43,7 @@ aplogo/logo.299 198107091311.24
 aplogo/-read-.-this- 198102260202.30
 archy/stty.31 198412310928.08
 as/chess.144 197607120126.31
+atlogo/supdup.1 198104160515.09
 bawden/dir^k.42 198712070148.34
 bawden/evacua.53 199004180325.12
 bawden/itsdev.102 198905230548.38