The area at $d000-$dfff with
CHAREN=1 CHAREN=0
$ffff +--------------+ /$e000 +----------+ +----------+ | Kernal ROM | / | I/O 2 | | | $e000 +--------------+/ $df00 +----------+ | | |I/O, Char ROM | | I/O 1 | | | $d000 +--------------+\ $de00 +----------+ | | | RAM | \ | CIA 2 | | | $c000 +--------------+ $dd00 +----------+ | | | Basic ROM | | CIA 1 | | | $a000 +--------------+ $dc00 +----------+ | Char ROM | | | |Color RAM | | | . RAM . | | | | . . $d800 +----------+ | | | | | SID | | | $0002 +--------------+ |registers | | | | I/O port DR | $d400 +----------+ | | $0001 +--------------+ | VIC | | | | I/O port DDR | |registers | | | $0000 +--------------+ $d000 +----------+ +----------+