Compaq 99875320-5 Manual De Usuario

TRACK 2 DECODE STATUS 
 

Bits 7-1 

0 

Value Reserved  Error 

 
This is a one-byte value, which indicates the status of decoding track 2.  Bit position zero 
indicates if there was an error decoding track 2 if this bit is set to one. If it is zero, then no error 
occurred.  If a track has data on it that is not noise, and it is not decodable, then a decode error is 
indicated.  If a decode error is indicated, the corresponding track data length value for the track 
that has the error will be set to zero and no valid track data will be supplied. 
 
TRACK 3 DECODE STATUS 
 

Bits 7-1 

0 

Value Reserved  Error 

 
This is a one-byte value, which indicates the status of decoding track 3.  Bit position zero 
indicates if there was an error decoding track 3 if this bit is set to one.  If it is zero, then no error 
occurred.  If a track has data on it that is not noise, and it is not decodable, then a decode error is 
indicated.  If a decode error is indicated, the corresponding track data length value for the track 
that has the error will be set to zero and no valid track data will be supplied. 
 
TRACK 1 DATA LENGTH 
 
This one-byte value indicates how many bytes of decoded card data are in the track 1 data field.  
This value will be zero if there was no data on the track or if there was an error decoding the 
track. 
 
TRACK 2 DATA LENGTH 
 
This one-byte value indicates how many bytes of decoded card data are in the track 2 data field.  
This value will be zero if there was no data on the track or if there was an error decoding the 
track. 
 
TRACK 3 DATA LENGTH 
 
This one-byte value indicates how many bytes of decoded card data are in the track 3 data field.  
This value will be zero if there was no data on the track or if there was an error decoding the 
track. 

 

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