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  Function 09H (decimal 9) sends a string of characters to the standard
  output device (which defaults to the display screen). The register pair
  DS:DX provides the address of the string. A $ character, ASCII 24H
  (decimal 36), marks the end of the string.

  Although this function can be far more convenient than the byte-by-byte
  display services (functions 02H and 06H), it is flawed by the use of a
  real, displayable character, $, as its string delimiter. This is not a
  recent mistake; it's another by-product of CP/M compatibility. You should
  never use this function with programs that output dollar signs.