H/W decoder

Address		Size	R/W	Reset Value	Init Value	Run Value	Values written by 940	Comments
C000	4000	16-bit	r/w	0	0	0	$1420	status seems to be in bit 0
C000	4002	16-bit	w	0	1	1	$0
C000	4004	16-bit	w	1	0	0	$0
C000	4006	16-bit	r	0	e13	e13
C000	4020	16-bit	w	0	0	2F0	$110	Macroblock params?
C000	4022	16-bit	w	0	0	0	$0
C000	4024	16-bit	w	5828	0	0	$0	Something really weird happens with these two registers
C000	4026	16-bit	w	0	0	0	$5,$A,$10,$61,$E0,$160,$264 …	Something really weird happens with these two registers, possibly a FIFO
C000	404E	16-bit	rw	0	0	0	?	404e and 4050 are written together
C000	4050	16-bit	w	0	0	0	?	404e and 4050 are written together
C000	4082	16-bit	w	0	0	0	$400
C000	4084	16-bit	w	1008	1008	1008	$d
C000	4086	16-bit	w	0	0	0	$4000
C000	4088	16-bit	w	88	88	88	$10
C000	408C	16-bit	w	0	220	220	?	High 16-bit bits for quantizer matrix data save?
C000	408E	16-bit	w	0	0	0	?	Low 16-bits
C000	4096	16-bit	w	0	0	228	?	High 16-bit bits of RL buffer
C000	4098	16-bit	w	0	0	0	?	Low 16-bits of RL buffer
C000	409A	16-bit	w	0	230	230	?	High 16-bits for mpeg4 h/w blocks line buffer
C000	409C	16-bit	w	0	0	0	$F	Low 16-bits
C000	4120	16-bit	w	c2	c2	cc2
C000	4124	16-bit	w	0	0	240	$180	Luma offset
C000	4126	16-bit	w	0	0	244	$188	CB Offset
C000	4128	16-bit	w	0	0	246	$18C	CR Offset
C000	4144	16-bit	rw	40	40	40	$1B0	4144, 4146 and 4148 are swapped with 4124, 4126 and 4128
C000	4146	16-bit	rw	50	50	50	$1B8	maybe some kind of double buffering?
C000	4148	16-bit	rw	60	60	60	$1BC
C000	414A	16-bit	w	70	70	70		these three are written together
C000	414C	16-bit	w	80	80	80		these three are written together
C000	414E	16-bit	w	90	90	90		these three are written together
C000	4154	16-bit	w	32	32	32
C000	4156	16-bit	w	0	0	0	$0
C000	4158	16-bit	w	0	0	0		Something really weird happens with these two registers
C000	415A	16-bit	w	0	0	0		Something really weird happens with these two registers