HP 12C decimal hexadecimal conversion

DEC -> HEX: GTO 00
  Input integer 0-255
  Result format is nibble.nibble
  e.g. 10.15 for AF
       12.05 for C5

HEX -> DEC: GTO 15
    Input format is nibble.nibble
    e.g. enter 14.13 for ED
                1.11 for 1B
    Result is an integer

Program
-------
01 16
03 /
04 DUP
05 INTG
06 SWAP
07 FRAC
08 .16
11 *
12 +
13 GTO 00
14 R/S
15 DUP
16 INTG
17 16
19 *
20 SWAP
21 FRAC
22 100
25 *
26 +
27 GTO 14