improved terminal raw mode

do not convert return to lf on input in raw mode

Author: cnvogelg

amitools/vamos/lib/dos/terminal.py

@@ -21,14 +21,27 @@ def close(self):
 
     def set_mode(self, cooked):
         # [iflag, oflag, cflag, lflag, ispeed, ospeed, cc]
+        #  0      1      2      3
         if termios:
             state = termios.tcgetattr(self.fd)
-            # control ECHO/ICANON/IEXTEN
+
+            # input modes
+            # ICRNL: do not convert CR to NL on input for raw
+            flags = termios.ICRNL
+            if cooked:
+                state[0] |= flags
+            else:
+                state[0] &= ~flags
+
+            # local modes: ECHO/ICANON/IEXTEN
+            # ECHO: no local echo
+            # ICANON/IEXTEN: no line-wise editing
             flags = termios.ECHO | termios.ICANON | termios.IEXTEN
             if cooked:
                 state[3] |= flags
             else:
                 state[3] &= ~flags
+
             termios.tcsetattr(self.fd, termios.TCSAFLUSH, state)
             return True
         else: