Coding of the new 512 bit German phone card

by

L. Padilla


Byte (bits)     Hex

               +----+
 1 (1...8)     | D8 |
               +----+
 2 (9...16)    | 2F | --> Germany
               +----+
 3 (17...24)   | FC |
               +----+
 4 (25...32)   | CA | --> Gemplus
               +----+
 5 (33...40)   | AX | --> 12 DM
               | EX | --> 50 DM
               +----+
 6 (41...48)   | XX |
 7 (49...56)   | XX | --> Serial number*
 8 (57...64)   | XX |
               +----+
 9 (65...72)   |    | --> #1s x 4096 +          )
10 (73...80)   |    | --> #1s x  512 +          )
11 (81...88)   |    | --> #1s x   64 +          ) 5 stage octal counter*
12 (89...96)   |    | --> #1s x    8 +          )
13 (97...104)  |    | --> #1s x    1 = 100 * DM )
               +----+
14 (105...112) | FF |
               +----+
15 (113...120) | FF | --> Erasable
               +----+
16 (121...128) | FF | --> Erasable
               +----+
17 (129...136) | FF |
..     ...     | .. | --> Area of bits set to 1
40 (313...320) | FF |
               +----+
41 (321...328) | 00 |
..     ...     | .. | --> Area of bits set to 0
44 (345...352) | 00 |
               +----+
45 (353...360) | 08 | --> Erasable
               +----+
46 (361...368) | 8E | --> Erasable
               +----+
47 (369...376) | 8F | --> Erasable
               +----+
48 (377...384) | FF | --> Erasable
               +----+
49 (385...392) | FF |
..     ...     | .. | --> Area of bits set to 1
64 (505...512) | FF |
               +----+

* For an explanation see Stephane Bausson's 
"What you need to know about electronics telecards".
E-mail: padilla at domain "gae ucm es" (my PGP/GPG public key)
First version: 23-Jan-1997, last update: 1-Mar-2000
This link: http://www.gae.ucm.es/~padilla/extrawork/coding.html
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