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  We now come to the grab bag of all other ROM BIOS services. (See Figure
  12-16.) Some of these services are intended for use in program
  applications; others are more likely to be used in operating-system
  software. The following sections describe these six service interrupts.

  Interrupt                Description
  Hex   Dec
  --------------------------------------------------------------------------
  05H    5                 Print-Screen Service
  11H   17                 Equipment-List Service
  12H   18                 Memory-Size Service
  18H   24                 ROM BASIC Loader Service
  19H   25                 Bootstrap Loader Service
  1AH   26                 Time-of-Day Services
  --------------------------------------------------------------------------

  Figure 12-16.  Six miscellaneous ROM BIOS services supported by IBM, and
  their associated interrupts.