
Key map variables:

Default key map	&400	0
Map 1 range	&401	&00	&1FF (Emacs keymap)
Map 2 range	&402	&00	&7E (Emacs ctrl-x extensions)
Map 3 range	&403	&00	&7E (Emacs meta extensions)
Map 4 range	&404	&06	&66 (Emacs ctrl-x 4 extensions)
Map 5 range	&405	&01	&7A (HTML mode extensions)
