$ fq -d asn1_ber dv tc20.ber
   |00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f|0123456789abcdef|.{}: tc20.ber (asn1_ber) 0x0-0xa.7 (11)
0x0|02                                             |.               |  class: "universal" (0) 0x0-0x0.1 (0.2)
0x0|02                                             |.               |  form: "primitive" (0) 0x0.2-0x0.2 (0.1)
0x0|02                                             |.               |  tag: "integer" (0x2) 0x0.3-0x0.7 (0.5)
0x0|   09                                          | .              |  length: 9 0x1-0x1.7 (1)
0x0|      80 00 01 01 01 01 01 01 01|              |  .........|    |  value: -2361182958856022458111 0x2-0xa.7 (9)