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Interface Modifications

FUNCTION ptCharHeight: INTEGER;  (* NOTE: was interface constant in
                                            pre-Turbo Ports. *)
  FUNCTION ptPixAspect: REAL;      (* NOTE: was interface constant in
                                            pre-Turbo Ports. *)
  PROCEDURE ptDiscardPorts( FullRefresh: BOOLEAN);
  PROCEDURE ptSysRefresh;

ptCharHeight and ptPixAspect continue to perform as they have always done. However, they now query at runtime for the values they return, so they will be correct as long as a display is being used for which PCVideo makes allowance.

ptDiscardPorts and ptSysRefresh are described along with the modifications to Ports for monoprogram format at 2.1.1.