/*
        S E R I A L . H

        Copyright (c) 1988, 1989 by Oklahoma Software Systems

        These are the global variables, functions and "defines" used by the
        SERIAL.C program.  This file should also be included in any other
        files which may make use of these Serial-I/O Routines.

        If you have any questions you can contact me via EchoMAIL at 147/30
        where I operate as a Point-mail system.

        Ron Merts


*/


extern void closeserial(void);
extern void far interrupt com_int (void);
extern int getccb(void);
extern void closeserial(void);
extern void initserial (void);
extern void i_disable (void);
extern void i_enable (int pnum);
extern void resvects (void);
extern void setvects (void);
extern void comon (void);
extern int SerialOut (char x);
extern int setserial (int Port,int Speed,int Parity,int Bits,int StopBit);
extern int checkCD(void);

#define TRUE    1
#define FALSE   0
#define SBUFSIZ 0x2000

#define COM1BASE        0x3F8   /* base port for com1                   */
#define COM2BASE        0x2F8   /* base port for com2                   */

/*                                                                      */
/*      registers for serial port (not all used)                        */
/*                                                                      */

#define TX      0       /*      Transmit register       */
#define RX      0       /*      receive register        */
#define IER     1       /*      Interrupt Enable        */
#define IIR     2       /*      Interrupt ID            */
#define LCR     3       /*      Line control            */
#define MCR     4       /*      Modem control           */
#define LSR     5       /*      Line Status             */
#define MSR     6       /*      Modem Status            */
#define DLL     0       /*      Divisor Latch Low       */
#define DLH     1       /*      Divisor latch high      */

/*                                                                      */
/*      Status values                                                   */
/*                                                                      */

#define RCVRDY  0x01    /*      Data ready flag         */
#define OVRERR  0x02    /*      Overrun error           */
#define PRTYERR 0x04    /*      Parity error            */
#define FRMERR  0x08    /*      Framing error           */
#define BRKINT  0x10    /*      Break interrupt         */
#define XMTRDY  0x20    /*      Transmit register empty */
#define XMTRSR  0x40    /*      Tx shift register empty */

/*                                                      */
/*      Status values for modem register                */
/*                                                      */

#define CTS     0x10
#define DSR     0x20
#define RI      0x40
#define CD      0x80

#define DTR     0x01
#define RTS     0x02
#define OUT2    0x08

#define IMR     0x21
#define ICR     0x20
#define EOI     0x20
#define RX      0
#define IIR     2
#define RX_MASK 7
#define RX_ID   4

#define IRQ3    0xf7
#define IRQ4    0xef

#define MCR     4
#define IER     1
#define MC_INT  8
#define RX_INT  1
#define RX_MASK 7
#define RX_ID   4

#define BUFOVFL 1       /* buffer overflowed    */

#define COM1 1
#define COM2 2

#define NO_PAR 0
#define EV_PAR 1
#define OD_PAR 2

extern int SError;
extern int portbase;
extern void (interrupt far *oldvects[3])();
extern char ccbuf[SBUFSIZ];
extern int startbuf;
extern int endbuf;