Removed accidental upload of copyrighted map files

1 files changed, 1285 insertions, 1285 deletions

diff --git a/WinQuake/net_comx.c b/WinQuake/net_comx.c
index 2115a14..77793de 100644
--- a/WinQuake/net_comx.c
+++ b/WinQuake/net_comx.c
@@ -1,1285 +1,1285 @@
-/*
-Copyright (C) 1996-1997 Id Software, Inc.
-
-This program is free software; you can redistribute it and/or
-modify it under the terms of the GNU General Public License
-as published by the Free Software Foundation; either version 2
-of the License, or (at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  
-
-See the GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
-
-*/
-// net_comx.c
-
-#include <dos.h>
-#include <dpmi.h>
-
-#define NUM_COM_PORTS	2
-
-#define ERR_TTY_LINE_STATUS		-1
-#define ERR_TTY_MODEM_STATUS	-2
-#define ERR_TTY_NODATA			-3
-
-#define QUEUESIZE	8192
-#define QUEUEMASK	(QUEUESIZE - 1)
-
-typedef struct
-{
-	volatile int  head;
-	volatile int  tail;
-	volatile byte data[QUEUESIZE];
-} queue;
-
-#define FULL(q)			(q.head == ((q.tail-1) & QUEUEMASK))
-#define EMPTY(q)		(q.tail == q.head)
-#define ENQUEUE(q,b)	(q.data[q.head] = b, q.head = (q.head + 1) & QUEUEMASK)
-#define DEQUEUE(q,b)	(b = q.data[q.tail], q.tail = (q.tail + 1) & QUEUEMASK)
-
-extern cvar_t	config_com_port;
-extern cvar_t	config_com_irq;
-extern cvar_t	config_com_baud;
-extern cvar_t	config_com_modem;
-extern cvar_t	config_modem_dialtype;
-extern cvar_t	config_modem_clear;
-extern cvar_t	config_modem_init;
-extern cvar_t	config_modem_hangup;
-
-extern int m_return_state;
-extern int m_state;
-extern qboolean m_return_onerror;
-extern char m_return_reason[32];
-
-// 8250, 16550 definitions
-#define TRANSMIT_HOLDING_REGISTER            0x00
-#define RECEIVE_BUFFER_REGISTER              0x00
-#define INTERRUPT_ENABLE_REGISTER            0x01
-#define   IER_RX_DATA_READY                  0x01
-#define   IER_TX_HOLDING_REGISTER_EMPTY      0x02
-#define   IER_LINE_STATUS                    0x04
-#define   IER_MODEM_STATUS                   0x08
-#define INTERRUPT_ID_REGISTER                0x02
-#define   IIR_MODEM_STATUS_INTERRUPT         0x00
-#define   IIR_TX_HOLDING_REGISTER_INTERRUPT  0x02
-#define   IIR_RX_DATA_READY_INTERRUPT        0x04
-#define   IIR_LINE_STATUS_INTERRUPT          0x06
-#define   IIR_FIFO_TIMEOUT                   0x0c
-#define   IIR_FIFO_ENABLED                   0xc0
-#define FIFO_CONTROL_REGISTER                0x02
-#define   FCR_FIFO_ENABLE                    0x01
-#define   FCR_RCVR_FIFO_RESET                0x02
-#define   FCR_XMIT_FIFO_RESET                0x04
-#define   FCR_TRIGGER_01                     0x00
-#define   FCR_TRIGGER_04                     0x40
-#define   FCR_TRIGGER_08                     0x80
-#define   FCR_TRIGGER_16                     0xc0
-#define LINE_CONTROL_REGISTER                0x03
-#define   LCR_DATA_BITS_5                    0x00
-#define   LCR_DATA_BITS_6                    0x01
-#define   LCR_DATA_BITS_7                    0x02
-#define   LCR_DATA_BITS_8                    0x03
-#define   LCR_STOP_BITS_1                    0x00
-#define   LCR_STOP_BITS_2                    0x04
-#define   LCR_PARITY_NONE                    0x00
-#define   LCR_PARITY_ODD                     0x08
-#define   LCR_PARITY_EVEN                    0x18
-#define   LCR_PARITY_MARK                    0x28
-#define   LCR_PARITY_SPACE                   0x38
-#define   LCR_SET_BREAK                      0x40
-#define   LCR_DLAB                           0x80
-#define MODEM_CONTROL_REGISTER               0x04
-#define   MCR_DTR                            0x01
-#define   MCR_RTS                            0x02
-#define   MCR_OUT1                           0x04
-#define   MCR_OUT2                           0x08
-#define   MCR_LOOPBACK                       0x10
-#define LINE_STATUS_REGISTER                 0x05
-#define   LSR_DATA_READY                     0x01
-#define   LSR_OVERRUN_ERROR                  0x02
-#define   LSR_PARITY_ERROR                   0x04
-#define   LSR_FRAMING_ERROR                  0x08
-#define   LSR_BREAK_DETECT                   0x10
-#define   LSR_TRANSMITTER_BUFFER_EMPTY       0x20
-#define   LSR_TRANSMITTER_EMPTY              0x40
-#define   LSR_FIFO_DIRTY                     0x80
-#define MODEM_STATUS_REGISTER                0x06
-#define   MSR_DELTA_CTS                      0x01
-#define   MSR_DELTA_DSR                      0x02
-#define   MSR_DELTA_RI                       0x04
-#define   MSR_DELTA_CD                       0x08
-#define   MSR_CTS                            0x10
-#define   MSR_DSR                            0x20
-#define   MSR_RI                             0x40
-#define   MSR_CD                             0x80
-#define DIVISOR_LATCH_LOW                    0x00
-#define DIVISOR_LATCH_HIGH                   0x01
-
-#define MODEM_STATUS_MASK	(MSR_CTS | MSR_DSR | MSR_CD)
-
-#define UART_AUTO	0
-#define UART_8250	1
-#define UART_16550	2
-
-static int ISA_uarts[]	= {0x3f8,0x2f8,0x3e8,0x2e8};
-static int ISA_IRQs[]	= {4,3,4,3};
-
-typedef struct ComPort_s
-{
-	struct ComPort_s		*next;
-	_go32_dpmi_seginfo		protectedModeInfo;
-	_go32_dpmi_seginfo		protectedModeSaveInfo;
-	int						uart;
-	volatile byte			modemStatus;
-	byte					modemStatusIgnore;
-	byte					lineStatus;
-	byte					bufferUsed;
-	qboolean				enabled;
-	volatile qboolean		statusUpdated;
-	qboolean				useModem;
-	qboolean				modemInitialized;
-	qboolean				modemRang;
-	qboolean				modemConnected;
-	queue					inputQueue;
-	queue					outputQueue;
-	char					clear[16];
-	char					startup[32];
-	char					shutdown[16];
-	char					buffer[128];
-	PollProcedure			poll;
-	double					timestamp;
-	byte					uartType;
-	byte					irq;
-	byte					baudBits;
-	byte					lineControl;
-	byte					portNumber;
-	char					dialType;
-	char					name[4];
-} ComPort;
-
-ComPort *portList = NULL;
-ComPort *handleToPort [NUM_COM_PORTS];
-
-static int Modem_Command(ComPort *p, char *commandString);
-static char *Modem_Response(ComPort *p);
-static void Modem_Hangup(ComPort *p);
-
-int TTY_Init(void);
-void TTY_Shutdown(void);
-int TTY_Open(int serialPortNumber);
-void TTY_Close(int handle);
-int TTY_ReadByte(int handle);
-int TTY_WriteByte(int handle, byte data);
-void TTY_Flush(int handle);
-int TTY_Connect(int handle, char *host);
-void TTY_Disconnect(int handle);
-qboolean TTY_CheckForConnection(int handle);
-qboolean TTY_IsEnabled(int serialPortNumber);
-qboolean TTY_IsModem(int serialPortNumber);
-qboolean TTY_OutputQueueIsEmpty(int handle);
-
-static void ISR_8250 (ComPort *p)
-{
-	byte	source = 0;
-	byte	b;
-
-	disable();
-
-	while((source = inportb (p->uart + INTERRUPT_ID_REGISTER) & 0x07) != 1)
-	{
-		switch (source)
-		{
-			case IIR_RX_DATA_READY_INTERRUPT:
-				b = inportb (p->uart + RECEIVE_BUFFER_REGISTER);
-				if (! FULL(p->inputQueue))
-				{
-					ENQUEUE (p->inputQueue, b);
-				}
-				else
-				{
-					p->lineStatus |= LSR_OVERRUN_ERROR;
-					p->statusUpdated = true;
-				}
-				break;
-
-			case IIR_TX_HOLDING_REGISTER_INTERRUPT:
-				if (! EMPTY(p->outputQueue))
-				{
-					DEQUEUE (p->outputQueue, b);
-					outportb (p->uart + TRANSMIT_HOLDING_REGISTER, b);
-				}
-				break;
-
-			case IIR_MODEM_STATUS_INTERRUPT:
-				p->modemStatus = (inportb (p->uart + MODEM_STATUS_REGISTER) & MODEM_STATUS_MASK) | p->modemStatusIgnore;
-				p->statusUpdated = true;
-				break;
-
-			case IIR_LINE_STATUS_INTERRUPT:
-				p->lineStatus = inportb (p->uart + LINE_STATUS_REGISTER);
-				p->statusUpdated = true;
-				break;
-		}
-		source = inportb (p->uart + INTERRUPT_ID_REGISTER) & 0x07;
-	}
-	outportb (0x20, 0x20);
-}
-
-static void COM1_ISR_8250 (void)
-{
-	ISR_8250 (handleToPort[0]);
-}
-
-static void COM2_ISR_8250 (void)
-{
-	ISR_8250 (handleToPort[1]);
-}
-
-
-
-static void ISR_16550 (ComPort *p)
-{
-	int		count;
-	byte	source;
-	byte	b;
-
-	disable();
-	while((source = inportb (p->uart + INTERRUPT_ID_REGISTER) & 0x07) != 1)
-	{
-		switch (source)
-		{
-			case IIR_RX_DATA_READY_INTERRUPT:
-				do
-				{
-					b = inportb (p->uart + RECEIVE_BUFFER_REGISTER);
-					if (!FULL(p->inputQueue))
-					{
-						ENQUEUE (p->inputQueue, b);
-					}
-					else
-					{
-						p->lineStatus |= LSR_OVERRUN_ERROR;
-						p->statusUpdated = true;
-					}
-				} while (inportb (p->uart + LINE_STATUS_REGISTER) & LSR_DATA_READY);
-				break;
-
-			case IIR_TX_HOLDING_REGISTER_INTERRUPT:
-				count = 16;
-				while ((! EMPTY(p->outputQueue)) && count--)
-				{
-					DEQUEUE (p->outputQueue, b);
-					outportb (p->uart + TRANSMIT_HOLDING_REGISTER, b);
-				}
-				break;
-
-			case IIR_MODEM_STATUS_INTERRUPT:
-				p->modemStatus = (inportb (p->uart + MODEM_STATUS_REGISTER) & MODEM_STATUS_MASK) | p->modemStatusIgnore;
-				p->statusUpdated = true;
-				break;
-
-			case IIR_LINE_STATUS_INTERRUPT:
-				p->lineStatus = inportb (p->uart + LINE_STATUS_REGISTER);
-				p->statusUpdated = true;
-				break;
-		}
-		source = inportb (p->uart + INTERRUPT_ID_REGISTER) & 0x07;
-	}
-
-	// check for lost IIR_TX_HOLDING_REGISTER_INTERRUPT on 16550a!
-	if (inportb (p->uart + LINE_STATUS_REGISTER ) & LSR_TRANSMITTER_EMPTY)
-	{
-		count = 16;
-		while ((! EMPTY(p->outputQueue)) && count--)
-		{
-			DEQUEUE (p->outputQueue, b);
-			outportb (p->uart + TRANSMIT_HOLDING_REGISTER, b);
-		}
-	}
-
-	outportb (0x20, 0x20);
-}
-
-static void COM1_ISR_16550 (void)
-{
-	ISR_16550 (handleToPort[0]);
-}
-
-static void COM2_ISR_16550 (void)
-{
-	ISR_16550 (handleToPort[1]);
-}
-
-
-void TTY_GetComPortConfig (int portNumber, int *port, int *irq, int *baud, qboolean *useModem)
-{
-	ComPort	*p;
-
-	p = handleToPort[portNumber];
-	*port = p->uart;
-	*irq = p->irq;
-	*baud = 115200 / p->baudBits;
-	*useModem = p->useModem;
-}
-
-void TTY_SetComPortConfig (int portNumber, int port, int irq, int baud, qboolean useModem)
-{
-	ComPort	*p;
-	float	temp;
-
-	if (useModem)
-	{
-		if (baud == 14400)
-			baud = 19200;
-		if (baud == 28800)
-			baud = 38400;
-	}
-
-	p = handleToPort[portNumber];
-	p->uart = port;
-	p->irq = irq;
-	p->baudBits = 115200 / baud;
-	p->useModem = useModem;
-
-	if (useModem)
-		temp = 1.0;
-	else
-		temp = 0.0;
-
-	Cvar_SetValue ("_config_com_port", (float)port);
-	Cvar_SetValue ("_config_com_irq", (float)irq);
-	Cvar_SetValue ("_config_com_baud", (float)baud);
-	Cvar_SetValue ("_config_com_modem", temp);
-}
-
-void TTY_GetModemConfig (int portNumber, char *dialType, char *clear, char *init, char *hangup)
-{
-	ComPort	*p;
-
-	p = handleToPort[portNumber];
-	*dialType = p->dialType;
-	Q_strcpy(clear, p->clear);
-	Q_strcpy(init, p->startup);
-	Q_strcpy(hangup, p->shutdown);
-}
-
-void TTY_SetModemConfig (int portNumber, char *dialType, char *clear, char *init, char *hangup)
-{
-	ComPort	*p;
-
-	p = handleToPort[portNumber];
-	p->dialType = dialType[0];
-	Q_strcpy(p->clear, clear);
-	Q_strcpy(p->startup, init);
-	Q_strcpy(p->shutdown, hangup);
-
-	p->modemInitialized = false;
-
-	Cvar_Set ("_config_modem_dialtype", dialType);
-	Cvar_Set ("_config_modem_clear", clear);
-	Cvar_Set ("_config_modem_init", init);
-	Cvar_Set ("_config_modem_hangup", hangup);
-}
-
-
-static void ResetComPortConfig (ComPort *p)
-{
-	p->useModem = false;
-	p->uartType = UART_AUTO;
-	p->uart = ISA_uarts[p->portNumber];
-	p->irq = ISA_IRQs[p->portNumber];
-	p->modemStatusIgnore = MSR_CD | MSR_CTS | MSR_DSR;
-	p->baudBits = 115200 / 57600;
-	p->lineControl = LCR_DATA_BITS_8 | LCR_STOP_BITS_1 | LCR_PARITY_NONE;
-	Q_strcpy(p->clear, "ATZ");
-	Q_strcpy(p->startup, "");
-	Q_strcpy(p->shutdown, "AT H");
-	p->modemRang = false;
-	p->modemConnected = false;
-	p->statusUpdated = false;
-	p->outputQueue.head = p->outputQueue.tail = 0;
-	p->inputQueue.head = p->inputQueue.tail = 0;
-}
-
-
-static void ComPort_Enable(ComPort *p)
-{
-	void	(*isr)(void);
-	int		n;
-	byte	b;
-
-	if (p->enabled)
-	{
-		Con_Printf("Already enabled\n");
-		return;
-	}
-
-	// disable all UART interrupts
-	outportb (p->uart + INTERRUPT_ENABLE_REGISTER, 0);
-
-	// clear out any buffered uncoming data
-	while((inportb (p->uart + LINE_STATUS_REGISTER)) & LSR_DATA_READY)
-		inportb (p->uart + RECEIVE_BUFFER_REGISTER);
-
-	// get the current line and modem status
-	p->modemStatus = (inportb (p->uart + MODEM_STATUS_REGISTER) & MODEM_STATUS_MASK) | p->modemStatusIgnore;
-	p->lineStatus = inportb (p->uart + LINE_STATUS_REGISTER);
-
-	// clear any UART interrupts
-	do
-	{
-		n = inportb (p->uart + INTERRUPT_ID_REGISTER) & 7;
-		if (n == IIR_RX_DATA_READY_INTERRUPT)
-			inportb (p->uart + RECEIVE_BUFFER_REGISTER);
-	} while (!(n & 1));
-
-	if (p->uartType == UART_AUTO)
-	{
-		outportb (p->uart + FIFO_CONTROL_REGISTER, FCR_FIFO_ENABLE);
-		b = inportb (p->uart + INTERRUPT_ID_REGISTER);
-		if ((b & IIR_FIFO_ENABLED) == IIR_FIFO_ENABLED)
-			p->uartType = UART_16550;
-		else
-			p->uartType = UART_8250;
-	}
-
-	// save the old interrupt handler
-	_go32_dpmi_get_protected_mode_interrupt_vector(p->irq + 8, &p->protectedModeSaveInfo);
-
-	if (p->uartType == UART_8250)
-	{
-		outportb (p->uart + FIFO_CONTROL_REGISTER, 0);
-		if (p == handleToPort[0])
-			isr = COM1_ISR_8250;
-		else
-			isr = COM2_ISR_8250;
-	}
-	else
-	{
-		outportb (p->uart + FIFO_CONTROL_REGISTER, FCR_FIFO_ENABLE | FCR_RCVR_FIFO_RESET | FCR_XMIT_FIFO_RESET | FCR_TRIGGER_08);
-		if (p == handleToPort[0])
-			isr = COM1_ISR_16550;
-		else
-			isr = COM2_ISR_16550;
-	}
-
-	p->protectedModeInfo.pm_offset = (int)isr;
-
-	n = _go32_dpmi_allocate_iret_wrapper(&p->protectedModeInfo);
-	if (n)
-	{
-		Con_Printf("serial: protected mode callback allocation failed\n");
-		return;
-	}
-
-	// disable interrupts at the processor
-	disable();
-
-	// install our interrupt handlers now
-	_go32_dpmi_set_protected_mode_interrupt_vector(p->irq + 8, &p->protectedModeInfo);
-
-	// enable our interrupt at the PIC
-	outportb (0x21, inportb (0x21) & ~(1<<p->irq));
-
-	// enable interrupts at the processor
-	enable();
-
-	// enable interrupts at the PIC
-	outportb (0x20, 0xc2);
-
-	// set baud rate & line control
-	outportb (p->uart + LINE_CONTROL_REGISTER, LCR_DLAB | p->lineControl);
-	outportb (p->uart, p->baudBits);
-	outportb (p->uart + 1, 0);
-	outportb (p->uart + LINE_CONTROL_REGISTER, p->lineControl);
-
-	// set modem control register & enable uart interrupt generation
-	outportb(p->uart + MODEM_CONTROL_REGISTER, MCR_OUT2 | MCR_RTS | MCR_DTR);
-
-	// enable the individual interrupts at the uart
-	outportb (p->uart + INTERRUPT_ENABLE_REGISTER, IER_RX_DATA_READY | IER_TX_HOLDING_REGISTER_EMPTY | IER_LINE_STATUS | IER_MODEM_STATUS);
-
-	p->enabled = true;
-}
-
-
-static void ComPort_Disable(ComPort *p)
-{
-	if (!p->enabled)
-	{
-		Con_Printf("Already disabled\n");
-		return;
-	}
-
-	// disable interrupts at the uart
-	outportb (p->uart + INTERRUPT_ENABLE_REGISTER, 0);
-
-	// disable our interrupt at the PIC
-	outportb (0x21, inportb (0x21) | (1<<p->irq));
-
-	// disable interrupts at the processor
-	disable();
-
-	// restore the old interrupt handler
-	_go32_dpmi_set_protected_mode_interrupt_vector(p->irq + 8, &p->protectedModeSaveInfo);
-	_go32_dpmi_free_iret_wrapper(&p->protectedModeInfo);
-
-	// enable interrupts at the processor
-	enable();
-
-	p->enabled = false;
-}
-
-
-static int CheckStatus (ComPort *p)
-{
-	int		ret = 0;
-
-	if (p->statusUpdated)
-	{
-		p->statusUpdated = false;
-
-		if (p->lineStatus & (LSR_OVERRUN_ERROR | LSR_PARITY_ERROR | LSR_FRAMING_ERROR | LSR_BREAK_DETECT))
-		{
-			if (p->lineStatus & LSR_OVERRUN_ERROR)
-				Con_DPrintf ("Serial overrun error\n");
-			if (p->lineStatus & LSR_PARITY_ERROR)
-				Con_DPrintf ("Serial parity error\n");
-			if (p->lineStatus & LSR_FRAMING_ERROR)
-				Con_DPrintf ("Serial framing error\n");
-			if (p->lineStatus & LSR_BREAK_DETECT)
-				Con_DPrintf ("Serial break detect\n");
-			ret = ERR_TTY_LINE_STATUS;
-		}
-
-		if ((p->modemStatus & MODEM_STATUS_MASK) != MODEM_STATUS_MASK)
-		{
-			if (!(p->modemStatus & MSR_CTS))
-				Con_Printf ("Serial lost CTS\n");
-			if (!(p->modemStatus & MSR_DSR))
-				Con_Printf ("Serial lost DSR\n");
-			if (!(p->modemStatus & MSR_CD))
-				Con_Printf ("Serial lost Carrier\n");
-			ret = ERR_TTY_MODEM_STATUS;
-		}
-	}
-
-	return ret;
-}
-
-
-static void Modem_Init(ComPort *p)
-{
-	double	start;
-	char	*response;
-
-	Con_Printf ("Initializing modem...\n");
-
-	// write 0 to MCR, wait 1/2 sec, then write the real value back again
-	// I got this from the guys at head-to-head who say it's necessary.
-	outportb(p->uart + MODEM_CONTROL_REGISTER, 0);
-	start = Sys_FloatTime();
-	while ((Sys_FloatTime() - start) < 0.5)
-		;
-	outportb(p->uart + MODEM_CONTROL_REGISTER, MCR_OUT2 | MCR_RTS | MCR_DTR);
-	start = Sys_FloatTime();
-	while ((Sys_FloatTime() - start) < 0.25)
-		;
-
-	if (*p->clear)
-	{
-		Modem_Command (p, p->clear);
-		start = Sys_FloatTime();
-		while(1)
-		{
-			if ((Sys_FloatTime() - start) > 3.0)
-			{
-				Con_Printf("No response - clear failed\n");
-				p->enabled = false;
-				goto failed;
-			}
-			response = Modem_Response(p);
-			if (!response)
-				continue;
-			if (Q_strncmp(response, "OK", 2) == 0)
-				break;
-			if (Q_strncmp(response, "ERROR", 5) == 0)
-			{
-				p->enabled = false;
-				goto failed;
-			}
-		}
-	}
-
-	if (*p->startup)
-	{
-		Modem_Command (p, p->startup);
-		start = Sys_FloatTime();
-		while(1)
-		{
-			if ((Sys_FloatTime() - start) > 3.0)
-			{
-				Con_Printf("No response - init failed\n");
-				p->enabled = false;
-				goto failed;
-			}
-			response = Modem_Response(p);
-			if (!response)
-				continue;
-			if (Q_strncmp(response, "OK", 2) == 0)
-				break;
-			if (Q_strncmp(response, "ERROR", 5) == 0)
-			{
-				p->enabled = false;
-				goto failed;
-			}
-		}
-	}
-
-	p->modemInitialized = true;
-	return;
-
-failed:
-	if (m_return_onerror)
-	{
-		key_dest = key_menu;
-		m_state = m_return_state;
-		m_return_onerror = false;
-		Q_strcpy(m_return_reason, "Initialization Failed");
-	}
-	return;
-}
-
-
-void TTY_Enable(int handle)
-{
-	ComPort	*p;
-
-	p = handleToPort [handle];
-	if (p->enabled)
-		return;
-
-	ComPort_Enable(p);
-
-	if (p->useModem && !p->modemInitialized)
-		Modem_Init (p);
-}
-
-
-int TTY_Open(int serialPortNumber)
-{
-	return serialPortNumber;
-}
-
-
-void TTY_Close(int handle)
-{
-	ComPort	*p;
-	double		startTime;
-
-	p = handleToPort [handle];
-
-	startTime = Sys_FloatTime();
-	while ((Sys_FloatTime() - startTime) < 1.0)
-		if (EMPTY(p->outputQueue))
-			break;
-
-	if (p->useModem)
-	{
-		if (p->modemConnected)
-			Modem_Hangup(p);
-	}
-}
-
-
-int TTY_ReadByte(int handle)
-{
-	int		ret;
-	ComPort	*p;
-
-	p = handleToPort [handle];
-
-	if ((ret = CheckStatus (p)) != 0)
-		return ret;
-	
-	if (EMPTY (p->inputQueue))
-		return ERR_TTY_NODATA;
-
-	DEQUEUE (p->inputQueue, ret);
-	return (ret & 0xff);
-}
-
-
-int TTY_WriteByte(int handle, byte data)
-{
-	ComPort	*p;
-
-	p = handleToPort [handle];
-	if (FULL(p->outputQueue))
-		return -1;
-
-	ENQUEUE (p->outputQueue, data);
-	return 0;
-}
-
-
-void TTY_Flush(int handle)
-{
-	byte b;
-	ComPort	*p;
-
-	p = handleToPort [handle];
-
-	if (inportb (p->uart + LINE_STATUS_REGISTER ) & LSR_TRANSMITTER_EMPTY)
-	{
-		DEQUEUE (p->outputQueue, b);
-		outportb(p->uart, b);
-	}
-}
-
-
-int TTY_Connect(int handle, char *host)
-{
-	double	start;
-	ComPort	*p;
-	char	*response = NULL;
-	keydest_t	save_key_dest;
-	byte	dialstring[64];
-	byte	b;
-
-	p = handleToPort[handle];
-
-	if ((p->modemStatus & MODEM_STATUS_MASK) != MODEM_STATUS_MASK)
-	{
-		Con_Printf ("Serial: line not ready (");
-		if ((p->modemStatus & MSR_CTS) == 0)
-			Con_Printf(" CTS");
-		if ((p->modemStatus & MSR_DSR) == 0)
-			Con_Printf(" DSR");
-		if ((p->modemStatus & MSR_CD) == 0)
-			Con_Printf(" CD");
-		Con_Printf(" )");
-		return -1;
-	}
-
-	// discard any scraps in the input buffer
-	while (! EMPTY (p->inputQueue))
-		DEQUEUE (p->inputQueue, b);
-
-	CheckStatus (p);
-
-	if (p->useModem)
-	{
-		save_key_dest = key_dest;
-		key_dest = key_console;
-		key_count = -2;
-
-		Con_Printf ("Dialing...\n");
-		sprintf(dialstring, "AT D%c %s\r", p->dialType, host);
-		Modem_Command (p, dialstring);
-		start = Sys_FloatTime();
-		while(1)
-		{
-			if ((Sys_FloatTime() - start) > 60.0)
-			{
-				Con_Printf("Dialing failure!\n");
-				break;
-			}
-
-			Sys_SendKeyEvents ();
-			if (key_count == 0)
-			{
-				if (key_lastpress != K_ESCAPE)
-				{
-					key_count = -2;
-					continue;
-				}
-				Con_Printf("Aborting...\n");
-				while ((Sys_FloatTime() - start) < 5.0)
-					;
-				disable();
-				p->outputQueue.head = p->outputQueue.tail = 0;
-				p->inputQueue.head = p->inputQueue.tail = 0;
-				outportb(p->uart + MODEM_CONTROL_REGISTER, inportb(p->uart + MODEM_CONTROL_REGISTER) & ~MCR_DTR);
-				enable();
-				start = Sys_FloatTime();
-				while ((Sys_FloatTime() - start) < 0.75)
-					;
-				outportb(p->uart + MODEM_CONTROL_REGISTER, inportb(p->uart + MODEM_CONTROL_REGISTER) | MCR_DTR);
-				response = "Aborted";
-				break;
-			}
-
-			response = Modem_Response(p);
-			if (!response)
-				continue;
-			if (Q_strncmp(response, "CONNECT", 7) == 0)
-			{
-				disable();
-				p->modemRang = true;
-				p->modemConnected = true;
-				p->outputQueue.head = p->outputQueue.tail = 0;
-				p->inputQueue.head = p->inputQueue.tail = 0;
-				enable();
-				key_dest = save_key_dest;
-				key_count = 0;
-				m_return_onerror = false;
-				return 0;
-			}
-			if (Q_strncmp(response, "NO CARRIER", 10) == 0)
-				break;
-			if (Q_strncmp(response, "NO DIALTONE", 11) == 0)
-				break;
-			if (Q_strncmp(response, "NO DIAL TONE", 12) == 0)
-				break;
-			if (Q_strncmp(response, "NO ANSWER", 9) == 0)
-				break;
-			if (Q_strncmp(response, "BUSY", 4) == 0)
-				break;
-			if (Q_strncmp(response, "ERROR", 5) == 0)
-				break;
-		}
-		key_dest = save_key_dest;
-		key_count = 0;
-		if (m_return_onerror)
-		{
-			key_dest = key_menu;
-			m_state = m_return_state;
-			m_return_onerror = false;
-			Q_strncpy(m_return_reason, response, 31);
-		}
-		return -1;
-	}
-	m_return_onerror = false;
-	return 0;
-}
-
-
-void TTY_Disconnect(int handle)
-{
-	ComPort *p;
-
-	p = handleToPort[handle];
-
-	if (p->useModem && p->modemConnected)
-		Modem_Hangup(p);
-}
-
-
-qboolean TTY_CheckForConnection(int handle)
-{
-	ComPort	*p;
-
-	p = handleToPort[handle];
-
-	CheckStatus (p);
-
-	if (p->useModem)
-	{
-		if (!p->modemRang)
-		{
-			if (!Modem_Response(p))
-				return false;
-
-			if (Q_strncmp(p->buffer, "RING", 4) == 0)
-			{
-				Modem_Command (p, "ATA");
-				p->modemRang = true;
-				p->timestamp = net_time;
-			}
-			return false;
-		}
-		if (!p->modemConnected)
-		{
-			if ((net_time - p->timestamp) > 35.0)
-			{
-				Con_Printf("Unable to establish modem connection\n");
-				p->modemRang = false;
-				return false;
-			}
-
-			if (!Modem_Response(p))
-				return false;
-
-			if (Q_strncmp (p->buffer, "CONNECT", 7) != 0)
-				return false;
-
-			disable();
-			p->modemConnected = true;
-			p->outputQueue.head = p->outputQueue.tail = 0;
-			p->inputQueue.head = p->inputQueue.tail = 0;
-			enable();
-			Con_Printf("Modem Connect\n");
-			return true;
-		}
-		return true;
-	}
-
-	// direct connect case
-	if (EMPTY (p->inputQueue))
-		return false;
-	return true;
-}
-
-
-qboolean TTY_IsEnabled(int serialPortNumber)
-{
-	return handleToPort[serialPortNumber]->enabled;
-}
-
-
-qboolean TTY_IsModem(int serialPortNumber)
-{
-	return handleToPort[serialPortNumber]->useModem;
-}
-
-
-qboolean TTY_OutputQueueIsEmpty(int handle)
-{
-	return EMPTY(handleToPort[handle]->outputQueue);
-}
-
-
-void Com_f (void)
-{
-	ComPort	*p;
-	int		portNumber;
-	int		i;
-	int		n;
-
-	// first, determine which port they're messing with
-	portNumber = Q_atoi(Cmd_Argv (0) + 3) - 1;
-	if (portNumber > 1)
-		return;
-	p = handleToPort[portNumber];
-
-	if (Cmd_Argc() == 1)
-	{
-		Con_Printf("Settings for COM%i\n", portNumber + 1);
-		Con_Printf("enabled:   %s\n", p->enabled ? "true" : "false");
-		Con_Printf("uart:      ");
-		if (p->uartType == UART_AUTO)
-			Con_Printf("auto\n");
-		else if (p->uartType == UART_8250)
-			Con_Printf("8250\n");
-		else
-			Con_Printf("16550\n");
-		Con_Printf("port:      %x\n", p->uart);
-		Con_Printf("irq:       %i\n", p->irq);
-		Con_Printf("baud:      %i\n", 115200 / p->baudBits);	
-		Con_Printf("CTS:       %s\n", (p->modemStatusIgnore & MSR_CTS) ? "ignored" : "honored");
-		Con_Printf("DSR:       %s\n", (p->modemStatusIgnore & MSR_DSR) ? "ignored" : "honored");
-		Con_Printf("CD:        %s\n", (p->modemStatusIgnore & MSR_CD) ? "ignored" : "honored");
-		if (p->useModem)
-		{
-			Con_Printf("type:      Modem\n");
-			Con_Printf("clear:     %s\n", p->clear);
-			Con_Printf("startup:   %s\n", p->startup);
-			Con_Printf("shutdown:  %s\n", p->shutdown);
-		}
-		else
-			Con_Printf("type:      Direct connect\n");
-
-		return;
-	}
-
-
-	if (Cmd_CheckParm ("disable"))
-	{
-		if (p->enabled)
-			ComPort_Disable(p);
-		p->modemInitialized = false;
-		return;
-	}
-
-	if (Cmd_CheckParm ("reset"))
-	{
-		ComPort_Disable(p);
-		ResetComPortConfig (p);
-		return;
-	}
-
-	if ((i = Cmd_CheckParm ("port")) != 0)
-	{
-		if (p->enabled)
-			{
-				Con_Printf("COM port must be disabled to change port\n");
-				return;
-			}
-		p->uart = Q_atoi (Cmd_Argv (i+1));
-	}
-
-	if ((i = Cmd_CheckParm ("irq")) != 0)
-	{
-		if (p->enabled)
-			{
-				Con_Printf("COM port must be disabled to change irq\n");
-				return;
-			}
-		p->irq = Q_atoi (Cmd_Argv (i+1));
-	}
-
-	if ((i = Cmd_CheckParm ("baud")) != 0)
-	{
-		if (p->enabled)
-			{
-				Con_Printf("COM port must be disabled to change baud\n");
-				return;
-			}
-		n = Q_atoi (Cmd_Argv (i+1));
-		if (n == 0)
-			Con_Printf("Invalid baud rate specified\n");
-		else
-			p->baudBits = 115200 / n;
-	}
-
-	if (Cmd_CheckParm ("8250"))
-	{
-		if (p->enabled)
-			{
-				Con_Printf("COM port must be disabled to change uart\n");
-				return;
-			}
-		p->uartType = UART_8250;
-		}
-	if (Cmd_CheckParm ("16550"))
-	{
-		if (p->enabled)
-			{
-				Con_Printf("COM port must be disabled to change uart\n");
-				return;
-			}
-		p->uartType = UART_16550;
-	}
-	if (Cmd_CheckParm ("auto"))
-	{
-		if (p->enabled)
-			{
-				Con_Printf("COM port must be disabled to change uart\n");
-				return;
-			}
-		p->uartType = UART_AUTO;
-	}
-
-	if (Cmd_CheckParm ("pulse"))
-		p->dialType = 'P';
-	if (Cmd_CheckParm ("tone"))
-		p->dialType = 'T';
-
-	if (Cmd_CheckParm ("direct"))
-		p->useModem = false;
-	if (Cmd_CheckParm ("modem"))
-		p->useModem = true;
-
-	if ((i = Cmd_CheckParm ("clear")) != 0)
-	{
-		Q_strncpy (p->clear, Cmd_Argv (i+1), 16);
-	}
-
-	if ((i = Cmd_CheckParm ("startup")) != 0)
-	{
-		Q_strncpy (p->startup, Cmd_Argv (i+1), 32);
-		p->modemInitialized = false;
-	}
-
-	if ((i = Cmd_CheckParm ("shutdown")) != 0)
-	{
-		Q_strncpy (p->shutdown, Cmd_Argv (i+1), 16);
-	}
-
-	if (Cmd_CheckParm ("-cts"))
-	{
-		p->modemStatusIgnore |= MSR_CTS;
-		p->modemStatus |= MSR_CTS;
-	}
-
-	if (Cmd_CheckParm ("+cts"))
-	{
-		p->modemStatusIgnore &= (~MSR_CTS);
-		p->modemStatus = (inportb (p->uart + MODEM_STATUS_REGISTER) & MODEM_STATUS_MASK) | p->modemStatusIgnore;
-	}
-
-	if (Cmd_CheckParm ("-dsr"))
-	{
-		p->modemStatusIgnore |= MSR_DSR;
-		p->modemStatus |= MSR_DSR;
-	}
-
-	if (Cmd_CheckParm ("+dsr"))
-	{
-		p->modemStatusIgnore &= (~MSR_DSR);
-		p->modemStatus = (inportb (p->uart + MODEM_STATUS_REGISTER) & MODEM_STATUS_MASK) | p->modemStatusIgnore;
-	}
-
-	if (Cmd_CheckParm ("-cd"))
-	{
-		p->modemStatusIgnore |= MSR_CD;
-		p->modemStatus |= MSR_CD;
-	}
-
-	if (Cmd_CheckParm ("+cd"))
-	{
-		p->modemStatusIgnore &= (~MSR_CD);
-		p->modemStatus = (inportb (p->uart + MODEM_STATUS_REGISTER) & MODEM_STATUS_MASK) | p->modemStatusIgnore;
-	}
-
-	if (Cmd_CheckParm ("enable"))
-	{
-		if (!p->enabled)
-			ComPort_Enable(p);
-		if (p->useModem && !p->modemInitialized)
-			Modem_Init (p);
-	}
-}
-
-
-int TTY_Init(void)
-{
-	int		n;
-	ComPort *p;
-
-	for (n = 0; n < NUM_COM_PORTS; n++)
-	{
-		p = (ComPort *)Hunk_AllocName(sizeof(ComPort), "comport");
-		if (p == NULL)
-			Sys_Error("Hunk alloc failed for com port\n");
-		p->next = portList;
-		portList = p;
-		handleToPort[n] = p;
-		p->portNumber = n;
-		p->dialType = 'T';
-		sprintf(p->name, "com%u", n+1);
-		Cmd_AddCommand (p->name, Com_f);
-		ResetComPortConfig (p);
-	}
-
-	GetComPortConfig = TTY_GetComPortConfig;
-	SetComPortConfig = TTY_SetComPortConfig;
-	GetModemConfig = TTY_GetModemConfig;
-	SetModemConfig = TTY_SetModemConfig;
-
-	return 0;
-}
-
-
-void TTY_Shutdown(void)
-{
-	int		n;
-	ComPort *p;
-
-	for (n = 0; n < NUM_COM_PORTS; n++)
-	{
-		p = handleToPort[n];
-		if (p->enabled)
-		{
-			while (p->modemConnected)
-				NET_Poll();
-			ComPort_Disable (p);
-		}
-	}
-}
-
-
-static int Modem_Command(ComPort *p, char *commandString)
-{
-	byte	b;
-
-	if (CheckStatus (p))
-		return -1;
-
-	disable();
-	p->outputQueue.head = p->outputQueue.tail = 0;
-	p->inputQueue.head = p->inputQueue.tail = 0;
-	enable();
-	p->bufferUsed = 0;
-
-	while (*commandString)
-		ENQUEUE (p->outputQueue, *commandString++);
-	ENQUEUE (p->outputQueue, '\r');
-
-	// get the transmit rolling
-	DEQUEUE (p->outputQueue, b);
-	outportb(p->uart, b);
-
-	return 0;
-}
-
-
-static char *Modem_Response(ComPort *p)
-{
-	byte	b;
-
-	if (CheckStatus (p))
-		return NULL;
-
-	while (! EMPTY(p->inputQueue))
-	{
-		DEQUEUE (p->inputQueue, b);
-
-		if (p->bufferUsed == (sizeof(p->buffer) - 1))
-			b = '\r';
-
-		if (b == '\r' && p->bufferUsed)
-		{
-			p->buffer[p->bufferUsed] = 0;
-			Con_Printf("%s\n", p->buffer);
-			SCR_UpdateScreen ();
-			p->bufferUsed = 0;
-			return p->buffer;
-		}
-
-		if (b < ' ' || b > 'z')
-			continue;
-		p->buffer[p->bufferUsed] = b;
-		p->bufferUsed++;
-	}
-
-	return NULL;
-}
-
-
-static void Modem_Hangup2(ComPort *p);
-static void Modem_Hangup3(ComPort *p);
-static void Modem_Hangup4(ComPort *p);
-
-static void Modem_Hangup(ComPort *p)
-{
-	Con_Printf("Hanging up modem...\n");
-	disable();
-	p->modemRang = false;
-	p->outputQueue.head = p->outputQueue.tail = 0;
-	p->inputQueue.head = p->inputQueue.tail = 0;
-	outportb(p->uart + MODEM_CONTROL_REGISTER, inportb(p->uart + MODEM_CONTROL_REGISTER) & ~MCR_DTR);
-	enable();
-	p->poll.procedure = Modem_Hangup2;
-	p->poll.arg = p;
-	SchedulePollProcedure(&p->poll, 1.5);
-}
-
-static void Modem_Hangup2(ComPort *p)
-{
-	outportb(p->uart + MODEM_CONTROL_REGISTER, inportb(p->uart + MODEM_CONTROL_REGISTER) | MCR_DTR);
-	Modem_Command(p, "+++");
-	p->poll.procedure = Modem_Hangup3;
-	SchedulePollProcedure(&p->poll, 1.5);
-}
-
-static void Modem_Hangup3(ComPort *p)
-{
-	Modem_Command(p, p->shutdown);
-	p->poll.procedure = Modem_Hangup4;
-	SchedulePollProcedure(&p->poll, 1.5);
-}
-
-static void Modem_Hangup4(ComPort *p)
-{
-	Modem_Response(p);
-	Con_Printf("Hangup complete\n");
-	p->modemConnected = false;
-}
+/*

+Copyright (C) 1996-1997 Id Software, Inc.

+

+This program is free software; you can redistribute it and/or

+modify it under the terms of the GNU General Public License

+as published by the Free Software Foundation; either version 2

+of the License, or (at your option) any later version.

+

+This program is distributed in the hope that it will be useful,

+but WITHOUT ANY WARRANTY; without even the implied warranty of

+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  

+

+See the GNU General Public License for more details.

+

+You should have received a copy of the GNU General Public License

+along with this program; if not, write to the Free Software

+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

+

+*/

+// net_comx.c

+

+#include <dos.h>

+#include <dpmi.h>

+

+#define NUM_COM_PORTS	2

+

+#define ERR_TTY_LINE_STATUS		-1

+#define ERR_TTY_MODEM_STATUS	-2

+#define ERR_TTY_NODATA			-3

+

+#define QUEUESIZE	8192

+#define QUEUEMASK	(QUEUESIZE - 1)

+

+typedef struct

+{

+	volatile int  head;

+	volatile int  tail;

+	volatile byte data[QUEUESIZE];

+} queue;

+

+#define FULL(q)			(q.head == ((q.tail-1) & QUEUEMASK))

+#define EMPTY(q)		(q.tail == q.head)

+#define ENQUEUE(q,b)	(q.data[q.head] = b, q.head = (q.head + 1) & QUEUEMASK)

+#define DEQUEUE(q,b)	(b = q.data[q.tail], q.tail = (q.tail + 1) & QUEUEMASK)

+

+extern cvar_t	config_com_port;

+extern cvar_t	config_com_irq;

+extern cvar_t	config_com_baud;

+extern cvar_t	config_com_modem;

+extern cvar_t	config_modem_dialtype;

+extern cvar_t	config_modem_clear;

+extern cvar_t	config_modem_init;

+extern cvar_t	config_modem_hangup;

+

+extern int m_return_state;

+extern int m_state;

+extern qboolean m_return_onerror;

+extern char m_return_reason[32];

+

+// 8250, 16550 definitions

+#define TRANSMIT_HOLDING_REGISTER            0x00

+#define RECEIVE_BUFFER_REGISTER              0x00

+#define INTERRUPT_ENABLE_REGISTER            0x01

+#define   IER_RX_DATA_READY                  0x01

+#define   IER_TX_HOLDING_REGISTER_EMPTY      0x02

+#define   IER_LINE_STATUS                    0x04

+#define   IER_MODEM_STATUS                   0x08

+#define INTERRUPT_ID_REGISTER                0x02

+#define   IIR_MODEM_STATUS_INTERRUPT         0x00

+#define   IIR_TX_HOLDING_REGISTER_INTERRUPT  0x02

+#define   IIR_RX_DATA_READY_INTERRUPT        0x04

+#define   IIR_LINE_STATUS_INTERRUPT          0x06

+#define   IIR_FIFO_TIMEOUT                   0x0c

+#define   IIR_FIFO_ENABLED                   0xc0

+#define FIFO_CONTROL_REGISTER                0x02

+#define   FCR_FIFO_ENABLE                    0x01

+#define   FCR_RCVR_FIFO_RESET                0x02

+#define   FCR_XMIT_FIFO_RESET                0x04

+#define   FCR_TRIGGER_01                     0x00

+#define   FCR_TRIGGER_04                     0x40

+#define   FCR_TRIGGER_08                     0x80

+#define   FCR_TRIGGER_16                     0xc0

+#define LINE_CONTROL_REGISTER                0x03

+#define   LCR_DATA_BITS_5                    0x00

+#define   LCR_DATA_BITS_6                    0x01

+#define   LCR_DATA_BITS_7                    0x02

+#define   LCR_DATA_BITS_8                    0x03

+#define   LCR_STOP_BITS_1                    0x00

+#define   LCR_STOP_BITS_2                    0x04

+#define   LCR_PARITY_NONE                    0x00

+#define   LCR_PARITY_ODD                     0x08

+#define   LCR_PARITY_EVEN                    0x18

+#define   LCR_PARITY_MARK                    0x28

+#define   LCR_PARITY_SPACE                   0x38

+#define   LCR_SET_BREAK                      0x40

+#define   LCR_DLAB                           0x80

+#define MODEM_CONTROL_REGISTER               0x04

+#define   MCR_DTR                            0x01

+#define   MCR_RTS                            0x02

+#define   MCR_OUT1                           0x04

+#define   MCR_OUT2                           0x08

+#define   MCR_LOOPBACK                       0x10

+#define LINE_STATUS_REGISTER                 0x05

+#define   LSR_DATA_READY                     0x01

+#define   LSR_OVERRUN_ERROR                  0x02

+#define   LSR_PARITY_ERROR                   0x04

+#define   LSR_FRAMING_ERROR                  0x08

+#define   LSR_BREAK_DETECT                   0x10

+#define   LSR_TRANSMITTER_BUFFER_EMPTY       0x20

+#define   LSR_TRANSMITTER_EMPTY              0x40

+#define   LSR_FIFO_DIRTY                     0x80

+#define MODEM_STATUS_REGISTER                0x06

+#define   MSR_DELTA_CTS                      0x01

+#define   MSR_DELTA_DSR                      0x02

+#define   MSR_DELTA_RI                       0x04

+#define   MSR_DELTA_CD                       0x08

+#define   MSR_CTS                            0x10

+#define   MSR_DSR                            0x20

+#define   MSR_RI                             0x40

+#define   MSR_CD                             0x80

+#define DIVISOR_LATCH_LOW                    0x00

+#define DIVISOR_LATCH_HIGH                   0x01

+

+#define MODEM_STATUS_MASK	(MSR_CTS | MSR_DSR | MSR_CD)

+

+#define UART_AUTO	0

+#define UART_8250	1

+#define UART_16550	2

+

+static int ISA_uarts[]	= {0x3f8,0x2f8,0x3e8,0x2e8};

+static int ISA_IRQs[]	= {4,3,4,3};

+

+typedef struct ComPort_s

+{

+	struct ComPort_s		*next;

+	_go32_dpmi_seginfo		protectedModeInfo;

+	_go32_dpmi_seginfo		protectedModeSaveInfo;

+	int						uart;

+	volatile byte			modemStatus;

+	byte					modemStatusIgnore;

+	byte					lineStatus;

+	byte					bufferUsed;

+	qboolean				enabled;

+	volatile qboolean		statusUpdated;

+	qboolean				useModem;

+	qboolean				modemInitialized;

+	qboolean				modemRang;

+	qboolean				modemConnected;

+	queue					inputQueue;

+	queue					outputQueue;

+	char					clear[16];

+	char					startup[32];

+	char					shutdown[16];

+	char					buffer[128];

+	PollProcedure			poll;

+	double					timestamp;

+	byte					uartType;

+	byte					irq;

+	byte					baudBits;

+	byte					lineControl;

+	byte					portNumber;

+	char					dialType;

+	char					name[4];

+} ComPort;

+

+ComPort *portList = NULL;

+ComPort *handleToPort [NUM_COM_PORTS];

+

+static int Modem_Command(ComPort *p, char *commandString);

+static char *Modem_Response(ComPort *p);

+static void Modem_Hangup(ComPort *p);

+

+int TTY_Init(void);

+void TTY_Shutdown(void);

+int TTY_Open(int serialPortNumber);

+void TTY_Close(int handle);

+int TTY_ReadByte(int handle);

+int TTY_WriteByte(int handle, byte data);

+void TTY_Flush(int handle);

+int TTY_Connect(int handle, char *host);

+void TTY_Disconnect(int handle);

+qboolean TTY_CheckForConnection(int handle);

+qboolean TTY_IsEnabled(int serialPortNumber);

+qboolean TTY_IsModem(int serialPortNumber);

+qboolean TTY_OutputQueueIsEmpty(int handle);

+

+static void ISR_8250 (ComPort *p)

+{

+	byte	source = 0;

+	byte	b;

+

+	disable();

+

+	while((source = inportb (p->uart + INTERRUPT_ID_REGISTER) & 0x07) != 1)

+	{

+		switch (source)

+		{

+			case IIR_RX_DATA_READY_INTERRUPT:

+				b = inportb (p->uart + RECEIVE_BUFFER_REGISTER);

+				if (! FULL(p->inputQueue))

+				{

+					ENQUEUE (p->inputQueue, b);

+				}

+				else

+				{

+					p->lineStatus |= LSR_OVERRUN_ERROR;

+					p->statusUpdated = true;

+				}

+				break;

+

+			case IIR_TX_HOLDING_REGISTER_INTERRUPT:

+				if (! EMPTY(p->outputQueue))

+				{

+					DEQUEUE (p->outputQueue, b);

+					outportb (p->uart + TRANSMIT_HOLDING_REGISTER, b);

+				}

+				break;

+

+			case IIR_MODEM_STATUS_INTERRUPT:

+				p->modemStatus = (inportb (p->uart + MODEM_STATUS_REGISTER) & MODEM_STATUS_MASK) | p->modemStatusIgnore;

+				p->statusUpdated = true;

+				break;

+

+			case IIR_LINE_STATUS_INTERRUPT:

+				p->lineStatus = inportb (p->uart + LINE_STATUS_REGISTER);

+				p->statusUpdated = true;

+				break;

+		}

+		source = inportb (p->uart + INTERRUPT_ID_REGISTER) & 0x07;

+	}

+	outportb (0x20, 0x20);

+}

+

+static void COM1_ISR_8250 (void)

+{

+	ISR_8250 (handleToPort[0]);

+}

+

+static void COM2_ISR_8250 (void)

+{

+	ISR_8250 (handleToPort[1]);

+}

+

+

+

+static void ISR_16550 (ComPort *p)

+{

+	int		count;

+	byte	source;

+	byte	b;

+

+	disable();

+	while((source = inportb (p->uart + INTERRUPT_ID_REGISTER) & 0x07) != 1)

+	{

+		switch (source)

+		{

+			case IIR_RX_DATA_READY_INTERRUPT:

+				do

+				{

+					b = inportb (p->uart + RECEIVE_BUFFER_REGISTER);

+					if (!FULL(p->inputQueue))

+					{

+						ENQUEUE (p->inputQueue, b);

+					}

+					else

+					{

+						p->lineStatus |= LSR_OVERRUN_ERROR;

+						p->statusUpdated = true;

+					}

+				} while (inportb (p->uart + LINE_STATUS_REGISTER) & LSR_DATA_READY);

+				break;

+

+			case IIR_TX_HOLDING_REGISTER_INTERRUPT:

+				count = 16;

+				while ((! EMPTY(p->outputQueue)) && count--)

+				{

+					DEQUEUE (p->outputQueue, b);

+					outportb (p->uart + TRANSMIT_HOLDING_REGISTER, b);

+				}

+				break;

+

+			case IIR_MODEM_STATUS_INTERRUPT:

+				p->modemStatus = (inportb (p->uart + MODEM_STATUS_REGISTER) & MODEM_STATUS_MASK) | p->modemStatusIgnore;

+				p->statusUpdated = true;

+				break;

+

+			case IIR_LINE_STATUS_INTERRUPT:

+				p->lineStatus = inportb (p->uart + LINE_STATUS_REGISTER);

+				p->statusUpdated = true;

+				break;

+		}

+		source = inportb (p->uart + INTERRUPT_ID_REGISTER) & 0x07;

+	}

+

+	// check for lost IIR_TX_HOLDING_REGISTER_INTERRUPT on 16550a!

+	if (inportb (p->uart + LINE_STATUS_REGISTER ) & LSR_TRANSMITTER_EMPTY)

+	{

+		count = 16;

+		while ((! EMPTY(p->outputQueue)) && count--)

+		{

+			DEQUEUE (p->outputQueue, b);

+			outportb (p->uart + TRANSMIT_HOLDING_REGISTER, b);

+		}

+	}

+

+	outportb (0x20, 0x20);

+}

+

+static void COM1_ISR_16550 (void)

+{

+	ISR_16550 (handleToPort[0]);

+}

+

+static void COM2_ISR_16550 (void)

+{

+	ISR_16550 (handleToPort[1]);

+}

+

+

+void TTY_GetComPortConfig (int portNumber, int *port, int *irq, int *baud, qboolean *useModem)

+{

+	ComPort	*p;

+

+	p = handleToPort[portNumber];

+	*port = p->uart;

+	*irq = p->irq;

+	*baud = 115200 / p->baudBits;

+	*useModem = p->useModem;

+}

+

+void TTY_SetComPortConfig (int portNumber, int port, int irq, int baud, qboolean useModem)

+{

+	ComPort	*p;

+	float	temp;

+

+	if (useModem)

+	{

+		if (baud == 14400)

+			baud = 19200;

+		if (baud == 28800)

+			baud = 38400;

+	}

+

+	p = handleToPort[portNumber];

+	p->uart = port;

+	p->irq = irq;

+	p->baudBits = 115200 / baud;

+	p->useModem = useModem;

+

+	if (useModem)

+		temp = 1.0;

+	else

+		temp = 0.0;

+

+	Cvar_SetValue ("_config_com_port", (float)port);

+	Cvar_SetValue ("_config_com_irq", (float)irq);

+	Cvar_SetValue ("_config_com_baud", (float)baud);

+	Cvar_SetValue ("_config_com_modem", temp);

+}

+

+void TTY_GetModemConfig (int portNumber, char *dialType, char *clear, char *init, char *hangup)

+{

+	ComPort	*p;

+

+	p = handleToPort[portNumber];

+	*dialType = p->dialType;

+	Q_strcpy(clear, p->clear);

+	Q_strcpy(init, p->startup);

+	Q_strcpy(hangup, p->shutdown);

+}

+

+void TTY_SetModemConfig (int portNumber, char *dialType, char *clear, char *init, char *hangup)

+{

+	ComPort	*p;

+

+	p = handleToPort[portNumber];

+	p->dialType = dialType[0];

+	Q_strcpy(p->clear, clear);

+	Q_strcpy(p->startup, init);

+	Q_strcpy(p->shutdown, hangup);

+

+	p->modemInitialized = false;

+

+	Cvar_Set ("_config_modem_dialtype", dialType);

+	Cvar_Set ("_config_modem_clear", clear);

+	Cvar_Set ("_config_modem_init", init);

+	Cvar_Set ("_config_modem_hangup", hangup);

+}

+

+

+static void ResetComPortConfig (ComPort *p)

+{

+	p->useModem = false;

+	p->uartType = UART_AUTO;

+	p->uart = ISA_uarts[p->portNumber];

+	p->irq = ISA_IRQs[p->portNumber];

+	p->modemStatusIgnore = MSR_CD | MSR_CTS | MSR_DSR;

+	p->baudBits = 115200 / 57600;

+	p->lineControl = LCR_DATA_BITS_8 | LCR_STOP_BITS_1 | LCR_PARITY_NONE;

+	Q_strcpy(p->clear, "ATZ");

+	Q_strcpy(p->startup, "");

+	Q_strcpy(p->shutdown, "AT H");

+	p->modemRang = false;

+	p->modemConnected = false;

+	p->statusUpdated = false;

+	p->outputQueue.head = p->outputQueue.tail = 0;

+	p->inputQueue.head = p->inputQueue.tail = 0;

+}

+

+

+static void ComPort_Enable(ComPort *p)

+{

+	void	(*isr)(void);

+	int		n;

+	byte	b;

+

+	if (p->enabled)

+	{

+		Con_Printf("Already enabled\n");

+		return;

+	}

+

+	// disable all UART interrupts

+	outportb (p->uart + INTERRUPT_ENABLE_REGISTER, 0);

+

+	// clear out any buffered uncoming data

+	while((inportb (p->uart + LINE_STATUS_REGISTER)) & LSR_DATA_READY)

+		inportb (p->uart + RECEIVE_BUFFER_REGISTER);

+

+	// get the current line and modem status

+	p->modemStatus = (inportb (p->uart + MODEM_STATUS_REGISTER) & MODEM_STATUS_MASK) | p->modemStatusIgnore;

+	p->lineStatus = inportb (p->uart + LINE_STATUS_REGISTER);

+

+	// clear any UART interrupts

+	do

+	{

+		n = inportb (p->uart + INTERRUPT_ID_REGISTER) & 7;

+		if (n == IIR_RX_DATA_READY_INTERRUPT)

+			inportb (p->uart + RECEIVE_BUFFER_REGISTER);

+	} while (!(n & 1));

+

+	if (p->uartType == UART_AUTO)

+	{

+		outportb (p->uart + FIFO_CONTROL_REGISTER, FCR_FIFO_ENABLE);

+		b = inportb (p->uart + INTERRUPT_ID_REGISTER);

+		if ((b & IIR_FIFO_ENABLED) == IIR_FIFO_ENABLED)

+			p->uartType = UART_16550;

+		else

+			p->uartType = UART_8250;

+	}

+

+	// save the old interrupt handler

+	_go32_dpmi_get_protected_mode_interrupt_vector(p->irq + 8, &p->protectedModeSaveInfo);

+

+	if (p->uartType == UART_8250)

+	{

+		outportb (p->uart + FIFO_CONTROL_REGISTER, 0);

+		if (p == handleToPort[0])

+			isr = COM1_ISR_8250;

+		else

+			isr = COM2_ISR_8250;

+	}

+	else

+	{

+		outportb (p->uart + FIFO_CONTROL_REGISTER, FCR_FIFO_ENABLE | FCR_RCVR_FIFO_RESET | FCR_XMIT_FIFO_RESET | FCR_TRIGGER_08);

+		if (p == handleToPort[0])

+			isr = COM1_ISR_16550;

+		else

+			isr = COM2_ISR_16550;

+	}

+

+	p->protectedModeInfo.pm_offset = (int)isr;

+

+	n = _go32_dpmi_allocate_iret_wrapper(&p->protectedModeInfo);

+	if (n)

+	{

+		Con_Printf("serial: protected mode callback allocation failed\n");

+		return;

+	}

+

+	// disable interrupts at the processor

+	disable();

+

+	// install our interrupt handlers now

+	_go32_dpmi_set_protected_mode_interrupt_vector(p->irq + 8, &p->protectedModeInfo);

+

+	// enable our interrupt at the PIC

+	outportb (0x21, inportb (0x21) & ~(1<<p->irq));

+

+	// enable interrupts at the processor

+	enable();

+

+	// enable interrupts at the PIC

+	outportb (0x20, 0xc2);

+

+	// set baud rate & line control

+	outportb (p->uart + LINE_CONTROL_REGISTER, LCR_DLAB | p->lineControl);

+	outportb (p->uart, p->baudBits);

+	outportb (p->uart + 1, 0);

+	outportb (p->uart + LINE_CONTROL_REGISTER, p->lineControl);

+

+	// set modem control register & enable uart interrupt generation

+	outportb(p->uart + MODEM_CONTROL_REGISTER, MCR_OUT2 | MCR_RTS | MCR_DTR);

+

+	// enable the individual interrupts at the uart

+	outportb (p->uart + INTERRUPT_ENABLE_REGISTER, IER_RX_DATA_READY | IER_TX_HOLDING_REGISTER_EMPTY | IER_LINE_STATUS | IER_MODEM_STATUS);

+

+	p->enabled = true;

+}

+

+

+static void ComPort_Disable(ComPort *p)

+{

+	if (!p->enabled)

+	{

+		Con_Printf("Already disabled\n");

+		return;

+	}

+

+	// disable interrupts at the uart

+	outportb (p->uart + INTERRUPT_ENABLE_REGISTER, 0);

+

+	// disable our interrupt at the PIC

+	outportb (0x21, inportb (0x21) | (1<<p->irq));

+

+	// disable interrupts at the processor

+	disable();

+

+	// restore the old interrupt handler

+	_go32_dpmi_set_protected_mode_interrupt_vector(p->irq + 8, &p->protectedModeSaveInfo);

+	_go32_dpmi_free_iret_wrapper(&p->protectedModeInfo);

+

+	// enable interrupts at the processor

+	enable();

+

+	p->enabled = false;

+}

+

+

+static int CheckStatus (ComPort *p)

+{

+	int		ret = 0;

+

+	if (p->statusUpdated)

+	{

+		p->statusUpdated = false;

+

+		if (p->lineStatus & (LSR_OVERRUN_ERROR | LSR_PARITY_ERROR | LSR_FRAMING_ERROR | LSR_BREAK_DETECT))

+		{

+			if (p->lineStatus & LSR_OVERRUN_ERROR)

+				Con_DPrintf ("Serial overrun error\n");

+			if (p->lineStatus & LSR_PARITY_ERROR)

+				Con_DPrintf ("Serial parity error\n");

+			if (p->lineStatus & LSR_FRAMING_ERROR)

+				Con_DPrintf ("Serial framing error\n");

+			if (p->lineStatus & LSR_BREAK_DETECT)

+				Con_DPrintf ("Serial break detect\n");

+			ret = ERR_TTY_LINE_STATUS;

+		}

+

+		if ((p->modemStatus & MODEM_STATUS_MASK) != MODEM_STATUS_MASK)

+		{

+			if (!(p->modemStatus & MSR_CTS))

+				Con_Printf ("Serial lost CTS\n");

+			if (!(p->modemStatus & MSR_DSR))

+				Con_Printf ("Serial lost DSR\n");

+			if (!(p->modemStatus & MSR_CD))

+				Con_Printf ("Serial lost Carrier\n");

+			ret = ERR_TTY_MODEM_STATUS;

+		}

+	}

+

+	return ret;

+}

+

+

+static void Modem_Init(ComPort *p)

+{

+	double	start;

+	char	*response;

+

+	Con_Printf ("Initializing modem...\n");

+

+	// write 0 to MCR, wait 1/2 sec, then write the real value back again

+	// I got this from the guys at head-to-head who say it's necessary.

+	outportb(p->uart + MODEM_CONTROL_REGISTER, 0);

+	start = Sys_FloatTime();

+	while ((Sys_FloatTime() - start) < 0.5)

+		;

+	outportb(p->uart + MODEM_CONTROL_REGISTER, MCR_OUT2 | MCR_RTS | MCR_DTR);

+	start = Sys_FloatTime();

+	while ((Sys_FloatTime() - start) < 0.25)

+		;

+

+	if (*p->clear)

+	{

+		Modem_Command (p, p->clear);

+		start = Sys_FloatTime();

+		while(1)

+		{

+			if ((Sys_FloatTime() - start) > 3.0)

+			{

+				Con_Printf("No response - clear failed\n");

+				p->enabled = false;

+				goto failed;

+			}

+			response = Modem_Response(p);

+			if (!response)

+				continue;

+			if (Q_strncmp(response, "OK", 2) == 0)

+				break;

+			if (Q_strncmp(response, "ERROR", 5) == 0)

+			{

+				p->enabled = false;

+				goto failed;

+			}

+		}

+	}

+

+	if (*p->startup)

+	{

+		Modem_Command (p, p->startup);

+		start = Sys_FloatTime();

+		while(1)

+		{

+			if ((Sys_FloatTime() - start) > 3.0)

+			{

+				Con_Printf("No response - init failed\n");

+				p->enabled = false;

+				goto failed;

+			}

+			response = Modem_Response(p);

+			if (!response)

+				continue;

+			if (Q_strncmp(response, "OK", 2) == 0)

+				break;

+			if (Q_strncmp(response, "ERROR", 5) == 0)

+			{

+				p->enabled = false;

+				goto failed;

+			}

+		}

+	}

+

+	p->modemInitialized = true;

+	return;

+

+failed:

+	if (m_return_onerror)

+	{

+		key_dest = key_menu;

+		m_state = m_return_state;

+		m_return_onerror = false;

+		Q_strcpy(m_return_reason, "Initialization Failed");

+	}

+	return;

+}

+

+

+void TTY_Enable(int handle)

+{

+	ComPort	*p;

+

+	p = handleToPort [handle];

+	if (p->enabled)

+		return;

+

+	ComPort_Enable(p);

+

+	if (p->useModem && !p->modemInitialized)

+		Modem_Init (p);

+}

+

+

+int TTY_Open(int serialPortNumber)

+{

+	return serialPortNumber;

+}

+

+

+void TTY_Close(int handle)

+{

+	ComPort	*p;

+	double		startTime;

+

+	p = handleToPort [handle];

+

+	startTime = Sys_FloatTime();

+	while ((Sys_FloatTime() - startTime) < 1.0)

+		if (EMPTY(p->outputQueue))

+			break;

+

+	if (p->useModem)

+	{

+		if (p->modemConnected)

+			Modem_Hangup(p);

+	}

+}

+

+

+int TTY_ReadByte(int handle)

+{

+	int		ret;

+	ComPort	*p;

+

+	p = handleToPort [handle];

+

+	if ((ret = CheckStatus (p)) != 0)

+		return ret;

+	

+	if (EMPTY (p->inputQueue))

+		return ERR_TTY_NODATA;

+

+	DEQUEUE (p->inputQueue, ret);

+	return (ret & 0xff);

+}

+

+

+int TTY_WriteByte(int handle, byte data)

+{

+	ComPort	*p;

+

+	p = handleToPort [handle];

+	if (FULL(p->outputQueue))

+		return -1;

+

+	ENQUEUE (p->outputQueue, data);

+	return 0;

+}

+

+

+void TTY_Flush(int handle)

+{

+	byte b;

+	ComPort	*p;

+

+	p = handleToPort [handle];

+

+	if (inportb (p->uart + LINE_STATUS_REGISTER ) & LSR_TRANSMITTER_EMPTY)

+	{

+		DEQUEUE (p->outputQueue, b);

+		outportb(p->uart, b);

+	}

+}

+

+

+int TTY_Connect(int handle, char *host)

+{

+	double	start;

+	ComPort	*p;

+	char	*response = NULL;

+	keydest_t	save_key_dest;

+	byte	dialstring[64];

+	byte	b;

+

+	p = handleToPort[handle];

+

+	if ((p->modemStatus & MODEM_STATUS_MASK) != MODEM_STATUS_MASK)

+	{

+		Con_Printf ("Serial: line not ready (");

+		if ((p->modemStatus & MSR_CTS) == 0)

+			Con_Printf(" CTS");

+		if ((p->modemStatus & MSR_DSR) == 0)

+			Con_Printf(" DSR");

+		if ((p->modemStatus & MSR_CD) == 0)

+			Con_Printf(" CD");

+		Con_Printf(" )");

+		return -1;

+	}

+

+	// discard any scraps in the input buffer

+	while (! EMPTY (p->inputQueue))

+		DEQUEUE (p->inputQueue, b);

+

+	CheckStatus (p);

+

+	if (p->useModem)

+	{

+		save_key_dest = key_dest;

+		key_dest = key_console;

+		key_count = -2;

+

+		Con_Printf ("Dialing...\n");

+		sprintf(dialstring, "AT D%c %s\r", p->dialType, host);

+		Modem_Command (p, dialstring);

+		start = Sys_FloatTime();

+		while(1)

+		{

+			if ((Sys_FloatTime() - start) > 60.0)

+			{

+				Con_Printf("Dialing failure!\n");

+				break;

+			}

+

+			Sys_SendKeyEvents ();

+			if (key_count == 0)

+			{

+				if (key_lastpress != K_ESCAPE)

+				{

+					key_count = -2;

+					continue;

+				}

+				Con_Printf("Aborting...\n");

+				while ((Sys_FloatTime() - start) < 5.0)

+					;

+				disable();

+				p->outputQueue.head = p->outputQueue.tail = 0;

+				p->inputQueue.head = p->inputQueue.tail = 0;

+				outportb(p->uart + MODEM_CONTROL_REGISTER, inportb(p->uart + MODEM_CONTROL_REGISTER) & ~MCR_DTR);

+				enable();

+				start = Sys_FloatTime();

+				while ((Sys_FloatTime() - start) < 0.75)

+					;

+				outportb(p->uart + MODEM_CONTROL_REGISTER, inportb(p->uart + MODEM_CONTROL_REGISTER) | MCR_DTR);

+				response = "Aborted";

+				break;

+			}

+

+			response = Modem_Response(p);

+			if (!response)

+				continue;

+			if (Q_strncmp(response, "CONNECT", 7) == 0)

+			{

+				disable();

+				p->modemRang = true;

+				p->modemConnected = true;

+				p->outputQueue.head = p->outputQueue.tail = 0;

+				p->inputQueue.head = p->inputQueue.tail = 0;

+				enable();

+				key_dest = save_key_dest;

+				key_count = 0;

+				m_return_onerror = false;

+				return 0;

+			}

+			if (Q_strncmp(response, "NO CARRIER", 10) == 0)

+				break;

+			if (Q_strncmp(response, "NO DIALTONE", 11) == 0)

+				break;

+			if (Q_strncmp(response, "NO DIAL TONE", 12) == 0)

+				break;

+			if (Q_strncmp(response, "NO ANSWER", 9) == 0)

+				break;

+			if (Q_strncmp(response, "BUSY", 4) == 0)

+				break;

+			if (Q_strncmp(response, "ERROR", 5) == 0)

+				break;

+		}

+		key_dest = save_key_dest;

+		key_count = 0;

+		if (m_return_onerror)

+		{

+			key_dest = key_menu;

+			m_state = m_return_state;

+			m_return_onerror = false;

+			Q_strncpy(m_return_reason, response, 31);

+		}

+		return -1;

+	}

+	m_return_onerror = false;

+	return 0;

+}

+

+

+void TTY_Disconnect(int handle)

+{

+	ComPort *p;

+

+	p = handleToPort[handle];

+

+	if (p->useModem && p->modemConnected)

+		Modem_Hangup(p);

+}

+

+

+qboolean TTY_CheckForConnection(int handle)

+{

+	ComPort	*p;

+

+	p = handleToPort[handle];

+

+	CheckStatus (p);

+

+	if (p->useModem)

+	{

+		if (!p->modemRang)

+		{

+			if (!Modem_Response(p))

+				return false;

+

+			if (Q_strncmp(p->buffer, "RING", 4) == 0)

+			{

+				Modem_Command (p, "ATA");

+				p->modemRang = true;

+				p->timestamp = net_time;

+			}

+			return false;

+		}

+		if (!p->modemConnected)

+		{

+			if ((net_time - p->timestamp) > 35.0)

+			{

+				Con_Printf("Unable to establish modem connection\n");

+				p->modemRang = false;

+				return false;

+			}

+

+			if (!Modem_Response(p))

+				return false;

+

+			if (Q_strncmp (p->buffer, "CONNECT", 7) != 0)

+				return false;

+

+			disable();

+			p->modemConnected = true;

+			p->outputQueue.head = p->outputQueue.tail = 0;

+			p->inputQueue.head = p->inputQueue.tail = 0;

+			enable();

+			Con_Printf("Modem Connect\n");

+			return true;

+		}

+		return true;

+	}

+

+	// direct connect case

+	if (EMPTY (p->inputQueue))

+		return false;

+	return true;

+}

+

+

+qboolean TTY_IsEnabled(int serialPortNumber)

+{

+	return handleToPort[serialPortNumber]->enabled;

+}

+

+

+qboolean TTY_IsModem(int serialPortNumber)

+{

+	return handleToPort[serialPortNumber]->useModem;

+}

+

+

+qboolean TTY_OutputQueueIsEmpty(int handle)

+{

+	return EMPTY(handleToPort[handle]->outputQueue);

+}

+

+

+void Com_f (void)

+{

+	ComPort	*p;

+	int		portNumber;

+	int		i;

+	int		n;

+

+	// first, determine which port they're messing with

+	portNumber = Q_atoi(Cmd_Argv (0) + 3) - 1;

+	if (portNumber > 1)

+		return;

+	p = handleToPort[portNumber];

+

+	if (Cmd_Argc() == 1)

+	{

+		Con_Printf("Settings for COM%i\n", portNumber + 1);

+		Con_Printf("enabled:   %s\n", p->enabled ? "true" : "false");

+		Con_Printf("uart:      ");

+		if (p->uartType == UART_AUTO)

+			Con_Printf("auto\n");

+		else if (p->uartType == UART_8250)

+			Con_Printf("8250\n");

+		else

+			Con_Printf("16550\n");

+		Con_Printf("port:      %x\n", p->uart);

+		Con_Printf("irq:       %i\n", p->irq);

+		Con_Printf("baud:      %i\n", 115200 / p->baudBits);	

+		Con_Printf("CTS:       %s\n", (p->modemStatusIgnore & MSR_CTS) ? "ignored" : "honored");

+		Con_Printf("DSR:       %s\n", (p->modemStatusIgnore & MSR_DSR) ? "ignored" : "honored");

+		Con_Printf("CD:        %s\n", (p->modemStatusIgnore & MSR_CD) ? "ignored" : "honored");

+		if (p->useModem)

+		{

+			Con_Printf("type:      Modem\n");

+			Con_Printf("clear:     %s\n", p->clear);

+			Con_Printf("startup:   %s\n", p->startup);

+			Con_Printf("shutdown:  %s\n", p->shutdown);

+		}

+		else

+			Con_Printf("type:      Direct connect\n");

+

+		return;

+	}

+

+

+	if (Cmd_CheckParm ("disable"))

+	{

+		if (p->enabled)

+			ComPort_Disable(p);

+		p->modemInitialized = false;

+		return;

+	}

+

+	if (Cmd_CheckParm ("reset"))

+	{

+		ComPort_Disable(p);

+		ResetComPortConfig (p);

+		return;

+	}

+

+	if ((i = Cmd_CheckParm ("port")) != 0)

+	{

+		if (p->enabled)

+			{

+				Con_Printf("COM port must be disabled to change port\n");

+				return;

+			}

+		p->uart = Q_atoi (Cmd_Argv (i+1));

+	}

+

+	if ((i = Cmd_CheckParm ("irq")) != 0)

+	{

+		if (p->enabled)

+			{

+				Con_Printf("COM port must be disabled to change irq\n");

+				return;

+			}

+		p->irq = Q_atoi (Cmd_Argv (i+1));

+	}

+

+	if ((i = Cmd_CheckParm ("baud")) != 0)

+	{

+		if (p->enabled)

+			{

+				Con_Printf("COM port must be disabled to change baud\n");

+				return;

+			}

+		n = Q_atoi (Cmd_Argv (i+1));

+		if (n == 0)

+			Con_Printf("Invalid baud rate specified\n");

+		else

+			p->baudBits = 115200 / n;

+	}

+

+	if (Cmd_CheckParm ("8250"))

+	{

+		if (p->enabled)

+			{

+				Con_Printf("COM port must be disabled to change uart\n");

+				return;

+			}

+		p->uartType = UART_8250;

+		}

+	if (Cmd_CheckParm ("16550"))

+	{

+		if (p->enabled)

+			{

+				Con_Printf("COM port must be disabled to change uart\n");

+				return;

+			}

+		p->uartType = UART_16550;

+	}

+	if (Cmd_CheckParm ("auto"))

+	{

+		if (p->enabled)

+			{

+				Con_Printf("COM port must be disabled to change uart\n");

+				return;

+			}

+		p->uartType = UART_AUTO;

+	}

+

+	if (Cmd_CheckParm ("pulse"))

+		p->dialType = 'P';

+	if (Cmd_CheckParm ("tone"))

+		p->dialType = 'T';

+

+	if (Cmd_CheckParm ("direct"))

+		p->useModem = false;

+	if (Cmd_CheckParm ("modem"))

+		p->useModem = true;

+

+	if ((i = Cmd_CheckParm ("clear")) != 0)

+	{

+		Q_strncpy (p->clear, Cmd_Argv (i+1), 16);

+	}

+

+	if ((i = Cmd_CheckParm ("startup")) != 0)

+	{

+		Q_strncpy (p->startup, Cmd_Argv (i+1), 32);

+		p->modemInitialized = false;

+	}

+

+	if ((i = Cmd_CheckParm ("shutdown")) != 0)

+	{

+		Q_strncpy (p->shutdown, Cmd_Argv (i+1), 16);

+	}

+

+	if (Cmd_CheckParm ("-cts"))

+	{

+		p->modemStatusIgnore |= MSR_CTS;

+		p->modemStatus |= MSR_CTS;

+	}

+

+	if (Cmd_CheckParm ("+cts"))

+	{

+		p->modemStatusIgnore &= (~MSR_CTS);

+		p->modemStatus = (inportb (p->uart + MODEM_STATUS_REGISTER) & MODEM_STATUS_MASK) | p->modemStatusIgnore;

+	}

+

+	if (Cmd_CheckParm ("-dsr"))

+	{

+		p->modemStatusIgnore |= MSR_DSR;

+		p->modemStatus |= MSR_DSR;

+	}

+

+	if (Cmd_CheckParm ("+dsr"))

+	{

+		p->modemStatusIgnore &= (~MSR_DSR);

+		p->modemStatus = (inportb (p->uart + MODEM_STATUS_REGISTER) & MODEM_STATUS_MASK) | p->modemStatusIgnore;

+	}

+

+	if (Cmd_CheckParm ("-cd"))

+	{

+		p->modemStatusIgnore |= MSR_CD;

+		p->modemStatus |= MSR_CD;

+	}

+

+	if (Cmd_CheckParm ("+cd"))

+	{

+		p->modemStatusIgnore &= (~MSR_CD);

+		p->modemStatus = (inportb (p->uart + MODEM_STATUS_REGISTER) & MODEM_STATUS_MASK) | p->modemStatusIgnore;

+	}

+

+	if (Cmd_CheckParm ("enable"))

+	{

+		if (!p->enabled)

+			ComPort_Enable(p);

+		if (p->useModem && !p->modemInitialized)

+			Modem_Init (p);

+	}

+}

+

+

+int TTY_Init(void)

+{

+	int		n;

+	ComPort *p;

+

+	for (n = 0; n < NUM_COM_PORTS; n++)

+	{

+		p = (ComPort *)Hunk_AllocName(sizeof(ComPort), "comport");

+		if (p == NULL)

+			Sys_Error("Hunk alloc failed for com port\n");

+		p->next = portList;

+		portList = p;

+		handleToPort[n] = p;

+		p->portNumber = n;

+		p->dialType = 'T';

+		sprintf(p->name, "com%u", n+1);

+		Cmd_AddCommand (p->name, Com_f);

+		ResetComPortConfig (p);

+	}

+

+	GetComPortConfig = TTY_GetComPortConfig;

+	SetComPortConfig = TTY_SetComPortConfig;

+	GetModemConfig = TTY_GetModemConfig;

+	SetModemConfig = TTY_SetModemConfig;

+

+	return 0;

+}

+

+

+void TTY_Shutdown(void)

+{

+	int		n;

+	ComPort *p;

+

+	for (n = 0; n < NUM_COM_PORTS; n++)

+	{

+		p = handleToPort[n];

+		if (p->enabled)

+		{

+			while (p->modemConnected)

+				NET_Poll();

+			ComPort_Disable (p);

+		}

+	}

+}

+

+

+static int Modem_Command(ComPort *p, char *commandString)

+{

+	byte	b;

+

+	if (CheckStatus (p))

+		return -1;

+

+	disable();

+	p->outputQueue.head = p->outputQueue.tail = 0;

+	p->inputQueue.head = p->inputQueue.tail = 0;

+	enable();

+	p->bufferUsed = 0;

+

+	while (*commandString)

+		ENQUEUE (p->outputQueue, *commandString++);

+	ENQUEUE (p->outputQueue, '\r');

+

+	// get the transmit rolling

+	DEQUEUE (p->outputQueue, b);

+	outportb(p->uart, b);

+

+	return 0;

+}

+

+

+static char *Modem_Response(ComPort *p)

+{

+	byte	b;

+

+	if (CheckStatus (p))

+		return NULL;

+

+	while (! EMPTY(p->inputQueue))

+	{

+		DEQUEUE (p->inputQueue, b);

+

+		if (p->bufferUsed == (sizeof(p->buffer) - 1))

+			b = '\r';

+

+		if (b == '\r' && p->bufferUsed)

+		{

+			p->buffer[p->bufferUsed] = 0;

+			Con_Printf("%s\n", p->buffer);

+			SCR_UpdateScreen ();

+			p->bufferUsed = 0;

+			return p->buffer;

+		}

+

+		if (b < ' ' || b > 'z')

+			continue;

+		p->buffer[p->bufferUsed] = b;

+		p->bufferUsed++;

+	}

+

+	return NULL;

+}

+

+

+static void Modem_Hangup2(ComPort *p);

+static void Modem_Hangup3(ComPort *p);

+static void Modem_Hangup4(ComPort *p);

+

+static void Modem_Hangup(ComPort *p)

+{

+	Con_Printf("Hanging up modem...\n");

+	disable();

+	p->modemRang = false;

+	p->outputQueue.head = p->outputQueue.tail = 0;

+	p->inputQueue.head = p->inputQueue.tail = 0;

+	outportb(p->uart + MODEM_CONTROL_REGISTER, inportb(p->uart + MODEM_CONTROL_REGISTER) & ~MCR_DTR);

+	enable();

+	p->poll.procedure = Modem_Hangup2;

+	p->poll.arg = p;

+	SchedulePollProcedure(&p->poll, 1.5);

+}

+

+static void Modem_Hangup2(ComPort *p)

+{

+	outportb(p->uart + MODEM_CONTROL_REGISTER, inportb(p->uart + MODEM_CONTROL_REGISTER) | MCR_DTR);

+	Modem_Command(p, "+++");

+	p->poll.procedure = Modem_Hangup3;

+	SchedulePollProcedure(&p->poll, 1.5);

+}

+

+static void Modem_Hangup3(ComPort *p)

+{

+	Modem_Command(p, p->shutdown);

+	p->poll.procedure = Modem_Hangup4;

+	SchedulePollProcedure(&p->poll, 1.5);

+}

+

+static void Modem_Hangup4(ComPort *p)

+{

+	Modem_Response(p);

+	Con_Printf("Hangup complete\n");

+	p->modemConnected = false;

+}