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──P-Code Instructions───────────────────────────────────────────────────────
 
  Syntax
 
  CallD#
 
  /* Direct p-code call; pop parameters and push return values */
 
  Description
 
  Calls a procedure in a p-code segment different from the currently
  executing procedure's segment. The implicit operand is an index into the
  current procedure's call table. This index is used to fetch a 1-byte
  index into the current segment's call table, which in turn is used to
  fetch a 2-byte PD (Procedure Descriptor).
 
  The PD identifies the entry point for the called procedure. It consists
  of an SN (Segment Number) and an EN (Entry Number).
 
 
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