Compaq 99875320-5 manual Card Encode Type, Track Data, Track 1 Data, Track 2 Data, Track 3 Data

Section 4. USB Communications

CARD ENCODE TYPE

This one-byte value indicates the type of encoding that was found on the card. The following table defines the possible values.

Value	Encode Type	Description
0	ISO/ABA	ISO/ABA encode format
1	AAMVA	AAMVA encode format
2	CADL	CADL encode format. Note that this reader can only read track
		2 for this format. It cannot read tracks 1 and 3. However, this
		format is obsolete.
3	Blank	The card is blank.
4	Other	The card has a non-standard encode format. For example,
		ISO/ABA track 1 format on track 2.
5	Undetermined	The card encode type could not be determined because no
		tracks could be decoded.
6	None	No decode has occurred. This type occurs if no magnetic stripe
		data has been acquired since the data has been cleared or
		since the device was powered on. This device only sends an
		Input report when a card has been swiped so this value will
		never occur.
7	JIS Type 2	JIS Type 2 encode format. Before this encode type can be
		decoded, decoding must be enabled with the decode enable
		property. The JIS type 2 decoding option was not added until
		firmware with software ID 21042812K01 was release in October
		2008.

TRACK DATA

If decodable track data exists for a given track, it is located in the track data field that corresponds to the track number. The length of each track data field is fixed at 110 bytes, but the length of valid data in each field is determined by the track data length field that corresponds to the track number. Track data located in positions greater than the track data length field indicates are undefined and should be ignored. The HID specification requires that reports be fixed in size, but the number of bytes encoded on a card may vary. Therefore, the Input Report always contains the maximum amount of bytes that can be encoded on the card and the number of valid bytes in each track is indicated by the track data length field. The track data is decoded and converted to ASCII. The track data includes all data starting with the start sentinel and ending with the end sentinel.

TRACK 1 DATA

This field contains the decoded track data for track 1.

TRACK 2 DATA

This field contains the decoded track data for track 2.

TRACK 3 DATA

This field contains the decoded track data for track 3.

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