MEMORY LAYOUT
=============
$0000-007F	*OS zero page
$0080-00FF	Application zero page
$0100-01FF	*Stack
$0200-03FF	*OS database
$0400-047F	*Cassette buffer
$0480-05FF
$0600-06FF
$0700-21FF	*Reserved for DOS
$2200-2220	Test display list (3x blank + LMS + 11 lines + jump)
$2220-23FF	Test screen (12 lines)
$2400-27FF	Library area
$2800-3FFF	Module area
$4000-7FFF	Extended memory window
$7FFF		-- APPMHI --
$7FFF		-- HIMEM --
$8000-8C1F	Reserved for graphics screen
$9C20-9FFF	Normal gr.0 screen
$A000		-- RAMTOP --
$A000-BFFF	*Reserved for cartridge area
