/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*  PORTLIST.HPP                       by Alan Partis, Copyright (C)         */
/*                                     International Trade Systems, Inc.     */
/*                                     1993 All rights reserved.             */
/*                                                                           */
/*  Description:   Class definition for the Port List class.                 */
/*                                                                           */
/*  Contents:      PortList                                                  */
/*                                                                           */
/*  Date      Initials  Comments                                             */
/*  -----------------------------------------------------------------------  */
/*  14 Sep 93 acp       Initial Creation                                     */
/*                                                                           */
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

#ifndef  _PORTLIST_HPP
#define  _PORTLIST_HPP

//
// supporting types and constants
//
typedef  struct {
    int       port;                    // com port number (COM1, COM2, etc.)
    word      address;                 // I/O address (03f8, 02f8, etc.)
} PORT;

#define  BIOS_SERIAL_DATA    (word far *)(0x00000400)
#define  COM_PORTS           4


/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*  PortList                           by Alan Partis, Copyright (C)         */
/*                                     International Trade Systems, Inc.     */
/*                                     1993 All rights reserved.             */
/*                                                                           */
/*  Description:   Class defining the behavior of a PortList.                */
/*                                                                           */
/*  Parents:       none                                                      */
/*                                                                           */
/*  Public Members:     PortList()                                           */
/*                     ~PortList()                                           */
/*                      Next()         gets next port in list                */
/*                      Reset()        resets current pointer to start       */
/*                                                                           */
/*  Date      Initials  Comments                                             */
/*  -----------------------------------------------------------------------  */
/*  14 Sep 93 acp       Initial Creation                                     */
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
class PortList
{
    private:

    protected:
         PORT      ports[COM_PORTS];   //list of active ports
         int       current;            //current working port

    public:
         //
         // constructor/deconstructor
         //
         PortList();
        ~PortList();

         //
         // class member functions
         //
         void      Next(PORT *NewPort);
         void      Reset();


};  /* end of class PortList */

#endif