WebSVN – ngs – Blame – /fpga/current/tb/sdmp3_test.s

Rev	Author	Line No.	Line
100	lvd	1
		2
		3	CPU Z80UNDOC
		4	RELAXED ON
		5
		6	include "ports.inc"
		7
		8	org 0x4000
		9
		10	di
101	lvd	11	im 0
		12
100	lvd	13	ld a,M_NOROM+C_24MHZ+M_EXPAG
		14	out (GSCFG0),a
		15
101	lvd	16
		17
		18	ld a,0xC3 ; JP
		19	ld (0x28),a
		20	ld (0x30),a
		21
		22	ld hl,MP3_INT
		23	ld (0x29),hl
		24	ld hl,SD_INT
		25	ld (0x31),hl
		26
		27	ld a,0x7F
		28	out (INTENA),a
		29	out (INTREQ),a
		30	ld a,0x86
		31	out (INTENA),a
		32
		33
		34	xor a
		35	ld (fin),a
		36	ld (fout),a
100	lvd	37
101	lvd	38	ld a,0x81
		39	ld (flags),a
		40
		41	call check
		42	ei
		43
		44	hloop
		45	halt
		46	jp hloop
100	lvd	47
101	lvd	48
		49	SD_INT
		50	ld hl,fin
		51	inc (hl)
		52
		53	ld hl,flags
		54	call check_sd
		55	bit 7,(hl)
		56	call nz,check_mp3
		57	ei
		58	ret
		59
		60
		61	MP3_INT
		62	ld hl,fout
		63	inc (hl)
		64
		65	ld hl,flags
		66	call check_mp3
		67	bit 0,(hl)
		68	call nz,check_sd
		69	ei
		70	ret
		71
		72
		73	check
		74	ld hl,flags
		75
		76	bit 0,(hl)
		77	call nz,check_sd
		78
		79	bit 7,(hl)
		80	call nz,check_mp3
		81	ret
		82
		83	check_sd
		84	ld a,(fout)
		85	ld c,a
		86	ld a,(fin)
		87	ld b,a
		88	sub c
		89	cp 128
		90	jr c,sd_start
		91
		92	set 0,(hl)
		93	ret
		94
		95	sd_start
100	lvd	96	ld a,C_DMA_SD
		97	out (DMA_MOD),a
101	lvd	98	ld a,1
		99	out (DMA_HAD),a
		100	ld a,b
		101	add a,a
		102	out (DMA_MAD),a
		103	xor a
		104	out (DMA_LAD),a
		105	ld a,0x80
		106	out (DMA_CST),a
		107
		108	res 0,(hl)
		109	ret
100	lvd	110
101	lvd	111
		112
		113	check_mp3
		114	ld a,(fout)
		115	ld c,a
		116	ld a,(fin)
		117	ld b,a
		118	sub c
		119	jr nz,mp3_start
		120
		121	set 7,(hl)
		122	ret
		123
		124	mp3_start
		125	ld a,C_DMA_MP3
		126	out (DMA_MOD),a
100	lvd	127	ld a,1
		128	out (DMA_HAD),a
101	lvd	129	ld a,c
		130	add a,a
		131	out (DMA_MAD),a
100	lvd	132	xor a
101	lvd	133	out (DMA_LAD),a
		134	ld a,0x80
		135	out (DMA_CST),a
		136
		137	res 7,(hl)
		138	ret
		139
		140
		141
		142
		143
		144
		145
		146	llloop
		147	ld a,C_DMA_SD
		148	out (DMA_MOD),a
		149
		150	ld a,1
		151	out (DMA_HAD),a
		152	xor a
100	lvd	153	out (DMA_MAD),a
		154	out (DMA_LAD),a
		155
		156	ld a,0x80
		157	out (DMA_CST),a
		158
101	lvd	159	in a,(DMA_CST)
		160	and 0x80
		161	jr nz,$-4
100	lvd	162
101	lvd	163
		164
		165	ld a,C_DMA_MP3
		166	out (DMA_MOD),a
		167
		168	ld a,1
		169	out (DMA_HAD),a
		170	xor a
		171	out (DMA_MAD),a
		172	out (DMA_LAD),a
		173
		174	ld a,0x80
		175	out (DMA_CST),a
		176
		177	in a,(DMA_CST)
		178	and 0x80
		179	jr nz,$-4
		180
		181
		182
		183	jp llloop
		184
		185	fin db 0
		186	fout db 0
		187	flags db 0
		188

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(root)/fpga/current/tb/sdmp3_test.s – Rev 101