DES Subkeys in one box? Can one calc the 16 subkeys in DES in one step ? I mean that we create for example a new “box“ where we directly permute the key k in 16 subkeys
Yes one can, this is, for example, in Stinson's book "Cryptography and Security", 1st edition, from which I quote.


  We now display the resulting key schedule. As mentioned above, each round uses a 48-bit key comprised of 48 of the bits in K. The entries in the tables below refer to the bits in K that are used in the various rounds.


Round 1


  10
  51
  34
  60
  49
  17
  33
  57
  2
  9
  19
  42
  3
  35
  26
  25
  44
  58
  59
  1
  36
  27
  18
  41
  22
  28
  39
  54
  37
  4
  47
  30
  5
  53
  23
  29
  61
  21
  38
  63
  15
  20
  45
  14
  13
  62
  55
  31


Thus the round 1 subkey uses bits 10,51,...,31 in that order.