MbAsciiToChar
[a] → [String.fromCharCode(Number(a))]

Adobe documentation

ActionMbAsciiToChar

ActionMBAsciiToChar converts ASCII to character code and is multi-byte aware.

FieldTypeComment
ActionMbAsciiToCharACTIONRECORDHEADERActionCode = 0x37

ActionMBAsciiToChar does the following:

  1. Pops a value off the stack.
  2. Converts the value from a number to the corresponding character. If the character is a 16-bit value (>= 256), a double-byte character is constructed with the first byte containing the high-order byte, and the second byte containing the low-order byte.
  3. Pushes the resulting character to the stack.