VT100
D13270S            +------+------+------+------+   +------+------+------+------+
Keyboard           |Cursor|Cursor|Cursor|Cursor|   |PF1   |PF2   |PF3   |PA1   |
Mapping            |up    |down  |left  |right |   |      |      |      |      |
		   +------+------+-------------+   +------+------+------+------+
				 |Back  |      |   |PF4   |PF5   |PF6   |PA2   |
				 |space |      |   |      |      |      |      |
			      +--+----+---+--+-+   +------+------+------+------+
Specials                      |Enter  |Delete|     |PF7   |PF8   |PF9   |PA3   |
========                      |       |      |     |      |      |      |      |
			   +--+       +------+     +------+------+------+------+
Ctrl e     On-line help    |          |      |     |PF10  |PF11  |PF12  |Clear |
Ctrl g     Master reset    |          |      |     |      |      |      |      |
Ctrl v     Refresh screen  +----------+------+     +------+------+------+      +
<ESC><tab> Backtab                    |Next  |     |PF shift     |Toggle|      |
<ESC><del> Erase to EOF               |line  |     |             |insert|      |
				      +------+     +------+------+------+------+

PF13,14, ... ,23,24 can be got by <PF shift> followed by PF1,PF2, ... ,PF11,PF12
