; A0 -> A0 depacker
depack
AU5_decrunch_2:
	link	a3,#-120
	movem.l	d0-a6,-(sp)
	lea	120(a0),a4	
	move.l	a4,a6		
	bsr.s	.getinfo
	cmpi.l	#'AU5!',d0	
	bne	.not_packed
	bsr.s	.getinfo	
	lea.l	-8(a0,d0.l),a5	
	bsr.s	.getinfo	
	move.l	d0,(sp)		
	adda.l	d0,a6		
	move.l	a6,a1

	moveq	#119,d0		
.save:	move.b	-(a1),-(a3)	
	dbf	d0,.save
	move.l	a6,a3		
	move.b	-(a5),d7	
	bsr.s	.normal_bytes
	move.l	a3,a5		

	bsr.s	.get_1_bit	
	bcc.s	.no_picture	
	move.w	#$0f9f,d7 	
.AU5_00:
	moveq	#3,d6	
.AU5_01:
	move.w	-(a3),d4
	moveq	#3,d5		
.AU5_02:
	add.w	d4,d4	
	addx.w	d0,d0		
	add.w	d4,d4		
	addx.w	d1,d1		
	add.w	d4,d4		
	addx.w	d2,d2		
	add.w	d4,d4		
	addx.w	d3,d3		
	dbra	d5,.AU5_02	
	dbra	d6,.AU5_01	
	movem.w	d0-d3,(a3)	
	dbra	d7,.AU5_00	
.no_picture
	movem.l	(sp),d0-a3	

.move	move.b	(a4)+,(a0)+
	subq.l	#1,d0
	bne.s	.move
	moveq	#119,d0		
.rest	move.b	-(a3),-(a5)	
	dbf	d0,.rest
.not_packed:
	movem.l	(sp)+,d0-a6
	unlk	a3
	rts
.getinfo: 
	moveq	#3,d1		
.getbytes:
	lsl.l	#8,d0	
	move.b	(a0)+,d0
	dbf	d1,.getbytes
	rts
.normal_bytes:	
	bsr.s	.get_1_bit
	bcc.s	.test_if_end	
	moveq.l	#0,d1		
	bsr.s	.get_1_bit
	bcc.s	.copy_direkt	
	lea.l	.direkt_tab+20(pc),a1
	moveq.l	#4,d3
.nextgb:
	move.l	-(a1),d0
	bsr.s	.get_d0_bits
	swap.w	d0
	cmp.w	d0,d1		
	dbne	d3,.nextgb	
.no_more: 
	add.l	20(a1),d1 	
.copy_direkt:	
	move.b	-(a5),-(a6)	
	dbf	d1,.copy_direkt	
.test_if_end:	
	cmpa.l	a4,a6		
	bgt.s	.strings	
	rts	

.get_1_bit:
	add.b	d7,d7		
	bne.s	.bitfound 	
	move.b	-(a5),d7	
	addx.b	d7,d7
.bitfound:
	rts	

.get_d0_bits:	
	moveq.l	#0,d1		
.hole_bit_loop:	
	add.b	d7,d7		
	bne.s	.on_d0		
	move.b	-(a5),d7	
	addx.b	d7,d7
.on_d0:	addx.w	d1,d1		
	dbf	d0,.hole_bit_loop	
	rts	

.strings: 
	lea.l	.length_tab(pc),a1	
	moveq.l	#3,d2		
.get_length_bit:	
	bsr.s	.get_1_bit
	dbcc	d2,.get_length_bit
.no_length_bit:	
	moveq.l	#0,d4		
	moveq.l	#0,d1
	move.b	1(a1,d2.w),d0	
	ext.w	d0		
	bmi.s	.no_ber	
.get_ber:
	bsr.s	.get_d0_bits
.no_ber:
	move.b	6(a1,d2.w),d4
	add.w	d1,d4	
	beq.s	.get_offset_2	

	lea.l	.more_offset(pc),a1 
	moveq.l	#1,d2
.getoffs: 
	bsr.s	.get_1_bit
	dbcc	d2,.getoffs
	moveq.l	#0,d1		
	move.b	1(a1,d2.w),d0	
	ext.w	d0		
	bsr.s	.get_d0_bits
	add.w	d2,d2		
	add.w	6(a1,d2.w),d1	
	bpl.s	.depack_bytes	
	sub.w	d4,d1		
	bra.s	.depack_bytes


.get_offset_2:	
	moveq.l	#0,d1		
	moveq.l	#5,d0		
	moveq.l	#-1,d2		
	bsr.s	.get_1_bit
	bcc.s	.less_40	
	moveq.l	#8,d0		
	moveq.l	#$3f,d2		
.less_40: 
	bsr.s	.get_d0_bits
	add.w	d2,d1		

.depack_bytes:			
	lea.l	2(a6,d4.w),a1	
	adda.w	d1,a1		
	move.b	-(a1),-(a6)	
.dep_b:	move.b	-(a1),-(a6)	
	dbf	d4,.dep_b 	
	bra	.normal_bytes	


.direkt_tab:
	dc.l $7fff000e,$00ff0007,$00070002,$00030001,$00030001	
	dc.l 270-1,15-1,8-1,5-1,2-1	

.length_tab:
	dc.b 9,1,0,-1,-1	
	dc.b 8,4,2,1,0		

.more_offset:
	dc.b	  11,   4,   7,  0	
	dc.w	$11f,  -1, $1f	

ende_AU5_decrunch_2:
;*************************************************** Ende der Unpackroutine