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MODEMIO.H
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C/C++ Source or Header
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1996-11-24
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/* +++Date last modified: 02-Nov-1995 */
/* */
/* This source is released to the Public */
/* domain on December 16, 1992. */
/* */
/* Curtis Paris */
/* Internet: cparis@comtch.spk.wa.usa */
/* */
#ifndef MODEMIO__H
#define MODEMIO__H
#include "pchwio.h"
#define MAX_BUFFER 1024 /* Max Input Buffer */
#define I8088_IMR 0x21
#define XON 0x11
#define XOFF 0x13
#ifdef MODEMIO_INIT
/*** Modem Buffer Information ***/
int modem_buffer_count=0;
unsigned char modem_buffer[MAX_BUFFER];
int modem_buffer_head=0,
modem_buffer_tail=0;
/*** Misc. Modem Status Information ***/
int modem_rts_cts=1; /* RTS/CTS variable 0=Off, 1=On */
int modem_xon_xoff=1; /* XON/XOFF variable 0=off, 1=on */
int modem_open=0; /* IS the port open variable, do not change */
int modem_port=0; /* What port is it on, 1-5 */
int modem_base=0; /* The ports BASE address */
int modem_irq =0; /* The IRQ */
int modem_vect=0; /* The Interrupt Vector */
int modem_overflow=0; /* Modem Overflow Alert */
int modem_pause=0; /* Is it paused for XON/XOFF */
/*** Old Port Interrupt Holders ***/
int old_modem_lcr, old_modem_imr,
old_modem_ier, old_modem_status;
#else
/*** Modem Buffer Information ***/
extern int modem_buffer_count;
extern unsigned char modem_buffer[MAX_BUFFER];
extern int modem_buffer_head,
modem_buffer_tail;
/*** Misc. Modem Status Information ***/
extern int modem_rts_cts;
extern int modem_xon_xoff;
extern int modem_open;
extern int modem_port;
extern int modem_base;
extern int modem_vect;
extern int modem_overflow;
extern int modem_pause;
/*** Old Port Interrupt Holders ***/
extern int old_modem_lcr, old_modem_imr,
old_modem_ier, old_modem_status;
#endif
int com_carrier(void);
int com_ch_ready(void);
int com_read_ch(void);
void com_send_ch(unsigned char ch);
void com_parity(char p);
void com_data_bits(unsigned char bits);
void com_stop_bits(unsigned char bits);
void com_speed(long speed);
int com_open(int comport, long speed, int data_bit, unsigned char parity,
unsigned char stop_bit);
void com_close(void);
#endif /* MODEMIO__H */