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  Title:       Direct System Services Interrupts
 
  Interrupt     Name
 
  00h           Divide by Zero Error
  01h           Single Step
  02h           Nonmaskable Interrupt (NMI)
  03h           Breakpoint
  04h           Arithmetic Overflow Error
  05h           Print Screen and BOUND Range Exceeded
  06h           Illegal Instruction Error
  07h           Processor Extension Not Available
  08h           Timer Tick
  09h           Keyboard I/O
  0Bh           Secondary Communications Port (COM2:)
  0Ch           Primary Communications Port (COM1:)
  0Eh           Disk Drive I/O
  11h           Get Equipment Configuration
  12h           Get Conventional Memory Size
  18h           ROM BASIC
  19h           Reboot System
  1Bh           CTRL+BREAK Handler
  1Ch           User Timer Service
  1Dh           Pointer to Video Parameter Table
  1Eh           Pointer to Disk Drive Parameter Table
  1Fh           Pointer to Graphics Character Pattern Table
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