This is a small program to convert between binary, decimal, and hexadecimal.

It also prints the ascii table in 2 formats.

$ radix -A

       0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
	
 2        !  "  #  $  %  &  '  (  )  *  +  ,  -  .  /
 3     0  1  2  3  4  5  6  7  8  9  :  ;  <  =  >  ?
 4     @  A  B  C  D  E  F  G  H  I  J  K  L  M  N  O
 5     P  Q  R  S  T  U  V  W  X  Y  Z  [  \  ]  ^  _
 6     `  a  b  c  d  e  f  g  h  i  j  k  l  m  n  o
 7     p  q  r  s  t  u  v  w  x  y  z  {  |  }

$ radix -a

       0  1  2  3  4  5  6  7  8  9
	
 3     �  �     !  "  #  $  %  &  '
 4     (  )  *  +  ,  -  .  /  0  1
 5     2  3  4  5  6  7  8  9  :  ;
 6     <  =  >  ?  @  A  B  C  D  E
 7     F  G  H  I  J  K  L  M  N  O
 8     P  Q  R  S  T  U  V  W  X  Y
 9     Z  [  \  ]  ^  _  `  a  b  c
10     d  e  f  g  h  i  j  k  l  m
11     n  o  p  q  r  s  t  u  v  w
12     x  y  z  {  |  }

Typing any of:
$ radix -b 1101
$ radix -o 15
$ radix 13
$ radix -x d
         Binary          Octal        Decimal            Hex
     0b00001101            015             13            0xd