Init:

CMD0		$00000000	-> no response
CMD8		$000001aa	-> ignore response if happen -> CCS=1 SDHC

do
	CMD55		$00000000	-> response (check CRC)
	ACMD41		$40ff0000	-> HCS! -> check response ($FF0000 have to set, otherwise card will never get ready)
while ACMD41 bit 31 not 1 (bit 14 is SDHC)

* CMD11 (switch to 1.8V -> no possible on DE2-115 (drive d/s 3.3V)

CMD2		$00000000	-> get CID	->goto identification state

CMD3				-> send relative address -> response is relative address upper 16, lower 16 card status	->goto standby state


*CMD9 -> get CSD (136 bit)

* ACMD6 -> set bus width

* CMD55 with RCA
* ACMD51 -> get SCR -> 0000 0920


*CMD7 -> select / deselect -> transfer state

*CMD42
*ACMD6
* -> yes CMD6
*	 CMD19 (Tuning)


*********** READ SINGLE BLOCK *********
***** CMD7  goto transfer state
***** CMD16 set block length (512)
***** CMD55 app (with RCA)
***** ACMD6 set bus width %10 = 4Bit
***** CMD17 read single block (CCS=0 then byte, else block)
***** 




128MB SD 	CID -> 00a820a998991c2108959221ab8015fc
		RCA -> 005d0032135983d3f6da4fff16400094
		OCR -> 80ff8000
		
MID 	01
OID 	5041		'PA'
PNM 	5331323842	'S128B'
PRV 	11
PSN	2B244357 
RES 	0
MDT	02B
CRC	f8>>1
NU	0

8GB SDHC	CID -> 275048534430384730B0022F9100C5FE
		RCA -> 400e00325b5900003b5f7f800a400074
		OCR -> C0ff8000 (block)

MID 	27
OID 	5048 		'PH'
PNM 	5344303847	'SD08G'
PRV 	30
PSN	B0022F91 
RES 	0
MDT	0c5
CRC	fe>>1
NU	0

2GB SD		CID -> 015041534D303247894A70134A008A26
		RCA -> 005d01321b5a83c0b6dbffff12800054
		OCR -> 80ff8000

MID 	01
OID 	5041 		'PN'
PNM 	534D303247	'SM02G'
PRV 	89
PSN	4A70134A 
RES 	0
MDT	08A
CRC	26>>1
NU	0


--- stable 1 (200 KHz) Standard setup

msk	 	$1ff
down cmp 	$000
up cmp 		$100

wrt cmp		$080
read cmp	$1bf

--- stable 2 (3.125 MHz) ~1.5MByte/s

msk	 	$1f
down cmp 	$00
up cmp 		$10

wrt cmp		$08
read cmp	$07


--- stable 3 (6.25 MHz) ~3MByte/s

msk	 	$0f
down cmp 	$00
up cmp 		$08

wrt cmp		$04
read cmp	$03

--- stable 4 (12.5 MHz) ~6MByte/s

msk	 	$07
down cmp 	$00
up cmp 		$04

wrt cmp		$02
read cmp	$01

--- stable 5 (25 MHz) ~12MByte/s

msk	 	$03
down cmp 	$00
up cmp 		$02

wrt cmp		$01
read cmp	$01