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 Introduction
 The Start-Up ROM
 The ROM BIOS
   Interrupt Vectors
      The Part DOS Plays
      Changing Interrupt Vectors
   Key Low-Memory Addresses
      The ROM BIOS Data Area
      The following pages describe useful low-memory addresses.
        0040:0010h
        0040:0049h
        0040:0072h
      The Intra-Application Communications Area
      The BIOS Extended Data Area
   The ROM Version and Machine-ID Markers
 The ROM BASIC
 The ROM Extensions
 Comments