ref: cb4c334c162601fa2e2675e293e2e4c7a6ae57e4
dir: /src/heretic/i_ibm.c/
// Emacs style mode select -*- C++ -*-
//-----------------------------------------------------------------------------
//
// Copyright(C) 1993-1996 Id Software, Inc.
// Copyright(C) 1993-2008 Raven Software
//
// 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.
//
//-----------------------------------------------------------------------------
// I_IBM.C
#include <dos.h>
#include <conio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <graph.h>
#include "doomdef.h"
#include "r_local.h"
#include "dmx.h"
// Macros
#define DPMI_INT 0x31
//#define NOKBD
//#define NOTIMER
// Public Data
int DisplayTicker = 0;
// Code
void main(int argc, char **argv)
{
myargc = argc;
myargv = argv;
D_DoomMain();
}
void I_StartupNet(void);
void I_ShutdownNet(void);
void I_ReadExternDriver(void);
typedef struct
{
unsigned edi, esi, ebp, reserved, ebx, edx, ecx, eax;
unsigned short flags, es, ds, fs, gs, ip, cs, sp, ss;
} dpmiregs_t;
extern dpmiregs_t dpmiregs;
void I_ReadMouse(void);
void I_InitDiskFlash(void);
extern int usemouse, usejoystick;
extern void **lumpcache;
/*
=============================================================================
CONSTANTS
=============================================================================
*/
#define SC_INDEX 0x3C4
#define SC_RESET 0
#define SC_CLOCK 1
#define SC_MAPMASK 2
#define SC_CHARMAP 3
#define SC_MEMMODE 4
#define CRTC_INDEX 0x3D4
#define CRTC_H_TOTAL 0
#define CRTC_H_DISPEND 1
#define CRTC_H_BLANK 2
#define CRTC_H_ENDBLANK 3
#define CRTC_H_RETRACE 4
#define CRTC_H_ENDRETRACE 5
#define CRTC_V_TOTAL 6
#define CRTC_OVERFLOW 7
#define CRTC_ROWSCAN 8
#define CRTC_MAXSCANLINE 9
#define CRTC_CURSORSTART 10
#define CRTC_CURSOREND 11
#define CRTC_STARTHIGH 12
#define CRTC_STARTLOW 13
#define CRTC_CURSORHIGH 14
#define CRTC_CURSORLOW 15
#define CRTC_V_RETRACE 16
#define CRTC_V_ENDRETRACE 17
#define CRTC_V_DISPEND 18
#define CRTC_OFFSET 19
#define CRTC_UNDERLINE 20
#define CRTC_V_BLANK 21
#define CRTC_V_ENDBLANK 22
#define CRTC_MODE 23
#define CRTC_LINECOMPARE 24
#define GC_INDEX 0x3CE
#define GC_SETRESET 0
#define GC_ENABLESETRESET 1
#define GC_COLORCOMPARE 2
#define GC_DATAROTATE 3
#define GC_READMAP 4
#define GC_MODE 5
#define GC_MISCELLANEOUS 6
#define GC_COLORDONTCARE 7
#define GC_BITMASK 8
#define ATR_INDEX 0x3c0
#define ATR_MODE 16
#define ATR_OVERSCAN 17
#define ATR_COLORPLANEENABLE 18
#define ATR_PELPAN 19
#define ATR_COLORSELECT 20
#define STATUS_REGISTER_1 0x3da
#define PEL_WRITE_ADR 0x3c8
#define PEL_READ_ADR 0x3c7
#define PEL_DATA 0x3c9
#define PEL_MASK 0x3c6
boolean grmode;
//==================================================
//
// joystick vars
//
//==================================================
boolean joystickpresent;
extern unsigned joystickx, joysticky;
boolean I_ReadJoystick(void); // returns false if not connected
//==================================================
#define VBLCOUNTER 34000 // hardware tics to a frame
#define TIMERINT 8
#define KEYBOARDINT 9
#define CRTCOFF (_inbyte(STATUS_REGISTER_1)&1)
#define CLI _disable()
#define STI _enable()
#define _outbyte(x,y) (outp(x,y))
#define _outhword(x,y) (outpw(x,y))
#define _inbyte(x) (inp(x))
#define _inhword(x) (inpw(x))
#define MOUSEB1 1
#define MOUSEB2 2
#define MOUSEB3 4
boolean mousepresent;
//static int tsm_ID = -1; // tsm init flag
//===============================
int ticcount;
// REGS stuff used for int calls
union REGS regs;
struct SREGS segregs;
boolean novideo; // if true, stay in text mode for debugging
#define KBDQUESIZE 32
byte keyboardque[KBDQUESIZE];
int kbdtail, kbdhead;
#define KEY_LSHIFT 0xfe
#define KEY_INS (0x80+0x52)
#define KEY_DEL (0x80+0x53)
#define KEY_PGUP (0x80+0x49)
#define KEY_PGDN (0x80+0x51)
#define KEY_HOME (0x80+0x47)
#define KEY_END (0x80+0x4f)
#define SC_RSHIFT 0x36
#define SC_LSHIFT 0x2a
byte scantokey[128] = {
// 0 1 2 3 4 5 6 7
// 8 9 A B C D E F
0, 27, '1', '2', '3', '4', '5', '6',
'7', '8', '9', '0', '-', '=', KEY_BACKSPACE, 9, // 0
'q', 'w', 'e', 'r', 't', 'y', 'u', 'i',
'o', 'p', '[', ']', 13, KEY_RCTRL, 'a', 's', // 1
'd', 'f', 'g', 'h', 'j', 'k', 'l', ';',
39, '`', KEY_LSHIFT, 92, 'z', 'x', 'c', 'v', // 2
'b', 'n', 'm', ',', '.', '/', KEY_RSHIFT, '*',
KEY_RALT, ' ', 0, KEY_F1, KEY_F2, KEY_F3, KEY_F4, KEY_F5, // 3
KEY_F6, KEY_F7, KEY_F8, KEY_F9, KEY_F10, 0, 0, KEY_HOME,
KEY_UPARROW, KEY_PGUP, '-', KEY_LEFTARROW, '5', KEY_RIGHTARROW, '+', KEY_END, //4
KEY_DOWNARROW, KEY_PGDN, KEY_INS, KEY_DEL, 0, 0, 0, KEY_F11,
KEY_F12, 0, 0, 0, 0, 0, 0, 0, // 5
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, // 6
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0 // 7
};
//==========================================================================
//--------------------------------------------------------------------------
//
// FUNC I_GetTime
//
// Returns time in 1/35th second tics.
//
//--------------------------------------------------------------------------
int I_GetTime(void)
{
#ifdef NOTIMER
ticcount++;
#endif
return (ticcount);
}
//--------------------------------------------------------------------------
//
// PROC I_ColorBorder
//
//--------------------------------------------------------------------------
void I_ColorBorder(void)
{
int i;
I_WaitVBL(1);
_outbyte(PEL_WRITE_ADR, 0);
for (i = 0; i < 3; i++)
{
_outbyte(PEL_DATA, 63);
}
}
//--------------------------------------------------------------------------
//
// PROC I_UnColorBorder
//
//--------------------------------------------------------------------------
void I_UnColorBorder(void)
{
int i;
I_WaitVBL(1);
_outbyte(PEL_WRITE_ADR, 0);
for (i = 0; i < 3; i++)
{
_outbyte(PEL_DATA, 0);
}
}
/*
============================================================================
USER INPUT
============================================================================
*/
//--------------------------------------------------------------------------
//
// PROC I_WaitVBL
//
//--------------------------------------------------------------------------
void I_WaitVBL(int vbls)
{
int i;
int old;
int stat;
if (novideo)
{
return;
}
while (vbls--)
{
do
{
stat = inp(STATUS_REGISTER_1);
if (stat & 8)
{
break;
}
}
while (1);
do
{
stat = inp(STATUS_REGISTER_1);
if ((stat & 8) == 0)
{
break;
}
}
while (1);
}
}
//--------------------------------------------------------------------------
//
// PROC I_SetPalette
//
// Palette source must use 8 bit RGB elements.
//
//--------------------------------------------------------------------------
void I_SetPalette(byte * palette)
{
int i;
if (novideo)
{
return;
}
I_WaitVBL(1);
_outbyte(PEL_WRITE_ADR, 0);
for (i = 0; i < 768; i++)
{
_outbyte(PEL_DATA, (gammatable[usegamma][*palette++]) >> 2);
}
}
/*
============================================================================
GRAPHICS MODE
============================================================================
*/
byte *pcscreen, *destscreen, *destview;
/*
==============
=
= I_Update
=
==============
*/
int UpdateState;
extern int screenblocks;
void I_Update(void)
{
int i;
byte *dest;
int tics;
static int lasttic;
//
// blit screen to video
//
if (DisplayTicker)
{
if (screenblocks > 9 || UpdateState & (I_FULLSCRN | I_MESSAGES))
{
dest = (byte *) screen;
}
else
{
dest = (byte *) pcscreen;
}
tics = ticcount - lasttic;
lasttic = ticcount;
if (tics > 20)
{
tics = 20;
}
for (i = 0; i < tics; i++)
{
*dest = 0xff;
dest += 2;
}
for (i = tics; i < 20; i++)
{
*dest = 0x00;
dest += 2;
}
}
if (UpdateState == I_NOUPDATE)
{
return;
}
if (UpdateState & I_FULLSCRN)
{
memcpy(pcscreen, screen, SCREENWIDTH * SCREENHEIGHT);
UpdateState = I_NOUPDATE; // clear out all draw types
}
if (UpdateState & I_FULLVIEW)
{
if (UpdateState & I_MESSAGES && screenblocks > 7)
{
for (i = 0; i <
(viewwindowy + viewheight) * SCREENWIDTH; i += SCREENWIDTH)
{
memcpy(pcscreen + i, screen + i, SCREENWIDTH);
}
UpdateState &= ~(I_FULLVIEW | I_MESSAGES);
}
else
{
for (i = viewwindowy * SCREENWIDTH + viewwindowx; i <
(viewwindowy + viewheight) * SCREENWIDTH; i += SCREENWIDTH)
{
memcpy(pcscreen + i, screen + i, viewwidth);
}
UpdateState &= ~I_FULLVIEW;
}
}
if (UpdateState & I_STATBAR)
{
memcpy(pcscreen + SCREENWIDTH * (SCREENHEIGHT - SBARHEIGHT),
screen + SCREENWIDTH * (SCREENHEIGHT - SBARHEIGHT),
SCREENWIDTH * SBARHEIGHT);
UpdateState &= ~I_STATBAR;
}
if (UpdateState & I_MESSAGES)
{
memcpy(pcscreen, screen, SCREENWIDTH * 28);
UpdateState &= ~I_MESSAGES;
}
// memcpy(pcscreen, screen, SCREENHEIGHT*SCREENWIDTH);
}
//--------------------------------------------------------------------------
//
// PROC I_InitGraphics
//
//--------------------------------------------------------------------------
void I_InitGraphics(void)
{
if (novideo)
{
return;
}
grmode = true;
regs.w.ax = 0x13;
int386(0x10, (const union REGS *) ®s, ®s);
pcscreen = destscreen = (byte *) 0xa0000;
I_SetPalette(W_CacheLumpName("PLAYPAL", PU_CACHE));
I_InitDiskFlash();
}
//--------------------------------------------------------------------------
//
// PROC I_ShutdownGraphics
//
//--------------------------------------------------------------------------
void I_ShutdownGraphics(void)
{
if (*(byte *) 0x449 == 0x13) // don't reset mode if it didn't get set
{
regs.w.ax = 3;
int386(0x10, ®s, ®s); // back to text mode
}
}
//--------------------------------------------------------------------------
//
// PROC I_ReadScreen
//
// Reads the screen currently displayed into a linear buffer.
//
//--------------------------------------------------------------------------
void I_ReadScreen(byte * scr)
{
memcpy(scr, screen, SCREENWIDTH * SCREENHEIGHT);
}
//===========================================================================
/*
===================
=
= I_StartTic
=
// called by D_DoomLoop
// called before processing each tic in a frame
// can call D_PostEvent
// asyncronous interrupt functions should maintain private ques that are
// read by the syncronous functions to be converted into events
===================
*/
/*
OLD STARTTIC STUFF
void I_StartTic (void)
{
int k;
event_t ev;
I_ReadMouse ();
//
// keyboard events
//
while (kbdtail < kbdhead)
{
k = keyboardque[kbdtail&(KBDQUESIZE-1)];
// if (k==14)
// I_Error ("exited");
kbdtail++;
// extended keyboard shift key bullshit
if ( (k&0x7f)==KEY_RSHIFT )
{
if ( keyboardque[(kbdtail-2)&(KBDQUESIZE-1)]==0xe0 )
continue;
k &= 0x80;
k |= KEY_RSHIFT;
}
if (k==0xe0)
continue; // special / pause keys
if (keyboardque[(kbdtail-2)&(KBDQUESIZE-1)] == 0xe1)
continue; // pause key bullshit
if (k==0xc5 && keyboardque[(kbdtail-2)&(KBDQUESIZE-1)] == 0x9d)
{
ev.type = ev_keydown;
ev.data1 = KEY_PAUSE;
D_PostEvent (&ev);
continue;
}
if (k&0x80)
ev.type = ev_keyup;
else
ev.type = ev_keydown;
k &= 0x7f;
ev.data1 = k;
//ev.data1 = scantokey[k];
D_PostEvent (&ev);
}
}
*/
#define SC_UPARROW 0x48
#define SC_DOWNARROW 0x50
#define SC_LEFTARROW 0x4b
#define SC_RIGHTARROW 0x4d
void I_StartTic(void)
{
int k;
event_t ev;
I_ReadMouse();
//
// keyboard events
//
while (kbdtail < kbdhead)
{
k = keyboardque[kbdtail & (KBDQUESIZE - 1)];
kbdtail++;
// extended keyboard shift key bullshit
if ((k & 0x7f) == SC_LSHIFT || (k & 0x7f) == SC_RSHIFT)
{
if (keyboardque[(kbdtail - 2) & (KBDQUESIZE - 1)] == 0xe0)
continue;
k &= 0x80;
k |= SC_RSHIFT;
}
if (k == 0xe0)
continue; // special / pause keys
if (keyboardque[(kbdtail - 2) & (KBDQUESIZE - 1)] == 0xe1)
continue; // pause key bullshit
if (k == 0xc5
&& keyboardque[(kbdtail - 2) & (KBDQUESIZE - 1)] == 0x9d)
{
ev.type = ev_keydown;
ev.data1 = KEY_PAUSE;
D_PostEvent(&ev);
continue;
}
if (k & 0x80)
ev.type = ev_keyup;
else
ev.type = ev_keydown;
k &= 0x7f;
switch (k)
{
case SC_UPARROW:
ev.data1 = KEY_UPARROW;
break;
case SC_DOWNARROW:
ev.data1 = KEY_DOWNARROW;
break;
case SC_LEFTARROW:
ev.data1 = KEY_LEFTARROW;
break;
case SC_RIGHTARROW:
ev.data1 = KEY_RIGHTARROW;
break;
default:
ev.data1 = scantokey[k];
break;
}
D_PostEvent(&ev);
}
}
void I_ReadKeys(void)
{
int k;
event_t ev;
while (1)
{
while (kbdtail < kbdhead)
{
k = keyboardque[kbdtail & (KBDQUESIZE - 1)];
kbdtail++;
printf("0x%x\n", k);
if (k == 1)
I_Quit();
}
}
}
/*
===============
=
= I_StartFrame
=
===============
*/
void I_StartFrame(void)
{
I_JoystickEvents();
I_ReadExternDriver();
}
/*
============================================================================
TIMER INTERRUPT
============================================================================
*/
void I_ColorBlack(int r, int g, int b)
{
_outbyte(PEL_WRITE_ADR, 0);
_outbyte(PEL_DATA, r);
_outbyte(PEL_DATA, g);
_outbyte(PEL_DATA, b);
}
/*
================
=
= I_TimerISR
=
================
*/
int I_TimerISR(void)
{
ticcount++;
return 0;
}
/*
============================================================================
KEYBOARD
============================================================================
*/
void (__interrupt __far * oldkeyboardisr) () = NULL;
int lastpress;
/*
================
=
= I_KeyboardISR
=
================
*/
void __interrupt I_KeyboardISR(void)
{
// Get the scan code
keyboardque[kbdhead & (KBDQUESIZE - 1)] = lastpress = _inbyte(0x60);
kbdhead++;
// acknowledge the interrupt
_outbyte(0x20, 0x20);
}
/*
===============
=
= I_StartupKeyboard
=
===============
*/
void I_StartupKeyboard(void)
{
#ifndef NOKBD
oldkeyboardisr = _dos_getvect(KEYBOARDINT);
_dos_setvect(0x8000 | KEYBOARDINT, I_KeyboardISR);
#endif
//I_ReadKeys ();
}
void I_ShutdownKeyboard(void)
{
if (oldkeyboardisr)
_dos_setvect(KEYBOARDINT, oldkeyboardisr);
*(short *) 0x41c = *(short *) 0x41a; // clear bios key buffer
}
/*
============================================================================
MOUSE
============================================================================
*/
int I_ResetMouse(void)
{
regs.w.ax = 0; // reset
int386(0x33, ®s, ®s);
return regs.w.ax;
}
/*
================
=
= StartupMouse
=
================
*/
void I_StartupCyberMan(void);
void I_StartupMouse(void)
{
int (far * function) ();
//
// General mouse detection
//
mousepresent = 0;
if (M_CheckParm("-nomouse") || !usemouse)
return;
if (I_ResetMouse() != 0xffff)
{
tprintf("Mouse: not present ", 0);
return;
}
tprintf("Mouse: detected ", 0);
mousepresent = 1;
I_StartupCyberMan();
}
/*
================
=
= ShutdownMouse
=
================
*/
void I_ShutdownMouse(void)
{
if (!mousepresent)
return;
I_ResetMouse();
}
/*
================
=
= I_ReadMouse
=
================
*/
void I_ReadMouse(void)
{
event_t ev;
//
// mouse events
//
if (!mousepresent)
return;
ev.type = ev_mouse;
memset(&dpmiregs, 0, sizeof(dpmiregs));
dpmiregs.eax = 3; // read buttons / position
DPMIInt(0x33);
ev.data1 = dpmiregs.ebx;
dpmiregs.eax = 11; // read counters
DPMIInt(0x33);
ev.data2 = (short) dpmiregs.ecx;
ev.data3 = -(short) dpmiregs.edx;
D_PostEvent(&ev);
}
/*
============================================================================
JOYSTICK
============================================================================
*/
int joyxl, joyxh, joyyl, joyyh;
boolean WaitJoyButton(void)
{
int oldbuttons, buttons;
oldbuttons = 0;
do
{
I_WaitVBL(1);
buttons = ((inp(0x201) >> 4) & 1) ^ 1;
if (buttons != oldbuttons)
{
oldbuttons = buttons;
continue;
}
if ((lastpress & 0x7f) == 1)
{
joystickpresent = false;
return false;
}
}
while (!buttons);
do
{
I_WaitVBL(1);
buttons = ((inp(0x201) >> 4) & 1) ^ 1;
if (buttons != oldbuttons)
{
oldbuttons = buttons;
continue;
}
if ((lastpress & 0x7f) == 1)
{
joystickpresent = false;
return false;
}
}
while (buttons);
return true;
}
/*
===============
=
= I_StartupJoystick
=
===============
*/
int basejoyx, basejoyy;
void I_StartupJoystick(void)
{
int buttons;
int count;
int centerx, centery;
joystickpresent = 0;
if (M_CheckParm("-nojoy") || !usejoystick)
return;
if (!I_ReadJoystick())
{
joystickpresent = false;
tprintf("joystick not found ", 0);
return;
}
printf("joystick found\n");
joystickpresent = true;
printf("CENTER the joystick and press button 1:");
if (!WaitJoyButton())
return;
I_ReadJoystick();
centerx = joystickx;
centery = joysticky;
printf
("\nPush the joystick to the UPPER LEFT corner and press button 1:");
if (!WaitJoyButton())
return;
I_ReadJoystick();
joyxl = (centerx + joystickx) / 2;
joyyl = (centerx + joysticky) / 2;
printf
("\nPush the joystick to the LOWER RIGHT corner and press button 1:");
if (!WaitJoyButton())
return;
I_ReadJoystick();
joyxh = (centerx + joystickx) / 2;
joyyh = (centery + joysticky) / 2;
printf("\n");
}
/*
===============
=
= I_JoystickEvents
=
===============
*/
void I_JoystickEvents(void)
{
event_t ev;
//
// joystick events
//
if (!joystickpresent)
return;
I_ReadJoystick();
ev.type = ev_joystick;
ev.data1 = ((inp(0x201) >> 4) & 15) ^ 15;
if (joystickx < joyxl)
ev.data2 = -1;
else if (joystickx > joyxh)
ev.data2 = 1;
else
ev.data2 = 0;
if (joysticky < joyyl)
ev.data3 = -1;
else if (joysticky > joyyh)
ev.data3 = 1;
else
ev.data3 = 0;
D_PostEvent(&ev);
}
/*
============================================================================
DPMI STUFF
============================================================================
*/
#define REALSTACKSIZE 1024
dpmiregs_t dpmiregs;
unsigned realstackseg;
void I_DivException(void);
int I_SetDivException(void);
void DPMIFarCall(void)
{
segread(&segregs);
regs.w.ax = 0x301;
regs.w.bx = 0;
regs.w.cx = 0;
regs.x.edi = (unsigned) &dpmiregs;
segregs.es = segregs.ds;
int386x(DPMI_INT, ®s, ®s, &segregs);
}
void DPMIInt(int i)
{
dpmiregs.ss = realstackseg;
dpmiregs.sp = REALSTACKSIZE - 4;
segread(&segregs);
regs.w.ax = 0x300;
regs.w.bx = i;
regs.w.cx = 0;
regs.x.edi = (unsigned) &dpmiregs;
segregs.es = segregs.ds;
int386x(DPMI_INT, ®s, ®s, &segregs);
}
/*
==============
=
= I_StartupDPMI
=
==============
*/
void I_StartupDPMI(void)
{
extern char __begtext;
extern char ___argc;
int n, d;
//
// allocate a decent stack for real mode ISRs
//
realstackseg = (int) I_AllocLow(1024) >> 4;
//
// lock the entire program down
//
// _dpmi_lockregion (&__begtext, &___argc - &__begtext);
//
// catch divide by 0 exception
//
#if 0
segread(&segregs);
regs.w.ax = 0x0203; // DPMI set processor exception handler vector
regs.w.bx = 0; // int 0
regs.w.cx = segregs.cs;
regs.x.edx = (int) &I_DivException;
printf("%x : %x\n", regs.w.cx, regs.x.edx);
int386(DPMI_INT, ®s, ®s);
#endif
#if 0
n = I_SetDivException();
printf("return: %i\n", n);
n = 100;
d = 0;
printf("100 / 0 = %i\n", n / d);
exit(1);
#endif
}
/*
============================================================================
TIMER INTERRUPT
============================================================================
*/
void (__interrupt __far * oldtimerisr) ();
void IO_ColorBlack(int r, int g, int b)
{
_outbyte(PEL_WRITE_ADR, 0);
_outbyte(PEL_DATA, r);
_outbyte(PEL_DATA, g);
_outbyte(PEL_DATA, b);
}
/*
================
=
= IO_TimerISR
=
================
*/
//void __interrupt IO_TimerISR (void)
void __interrupt __far IO_TimerISR(void)
{
ticcount++;
_outbyte(0x20, 0x20); // Ack the interrupt
}
/*
=====================
=
= IO_SetTimer0
=
= Sets system timer 0 to the specified speed
=
=====================
*/
void IO_SetTimer0(int speed)
{
if (speed > 0 && speed < 150)
I_Error("INT_SetTimer0: %i is a bad value", speed);
_outbyte(0x43, 0x36); // Change timer 0
_outbyte(0x40, speed);
_outbyte(0x40, speed >> 8);
}
/*
===============
=
= IO_StartupTimer
=
===============
*/
void IO_StartupTimer(void)
{
oldtimerisr = _dos_getvect(TIMERINT);
_dos_setvect(0x8000 | TIMERINT, IO_TimerISR);
IO_SetTimer0(VBLCOUNTER);
}
void IO_ShutdownTimer(void)
{
if (oldtimerisr)
{
IO_SetTimer0(0); // back to 18.4 ips
_dos_setvect(TIMERINT, oldtimerisr);
}
}
//===========================================================================
/*
===============
=
= I_Init
=
= hook interrupts and set graphics mode
=
===============
*/
void I_Init(void)
{
extern void I_StartupTimer(void);
novideo = M_CheckParm("novideo");
tprintf("I_StartupDPMI", 1);
I_StartupDPMI();
tprintf("I_StartupMouse ", 1);
I_StartupMouse();
// tprintf("I_StartupJoystick ",1);
// I_StartupJoystick();
// tprintf("I_StartupKeyboard ",1);
// I_StartupKeyboard();
tprintf("S_Init... ", 1);
S_Init();
//IO_StartupTimer();
S_Start();
}
/*
===============
=
= I_Shutdown
=
= return to default system state
=
===============
*/
void I_Shutdown(void)
{
I_ShutdownGraphics();
IO_ShutdownTimer();
S_ShutDown();
I_ShutdownMouse();
I_ShutdownKeyboard();
IO_SetTimer0(0);
}
/*
================
=
= I_Error
=
================
*/
void I_Error(char *error, ...)
{
union REGS regs;
va_list argptr;
D_QuitNetGame();
I_Shutdown();
va_start(argptr, error);
regs.x.eax = 0x3;
int386(0x10, ®s, ®s);
vprintf(error, argptr);
va_end(argptr);
printf("\n");
exit(1);
}
//--------------------------------------------------------------------------
//
// I_Quit
//
// Shuts down net game, saves defaults, prints the exit text message,
// goes to text mode, and exits.
//
//--------------------------------------------------------------------------
void I_Quit(void)
{
byte *scr;
char *lumpName;
int r;
D_QuitNetGame();
M_SaveDefaults();
scr = (byte *) W_CacheLumpName("ENDTEXT", PU_CACHE);
I_Shutdown();
memcpy((void *) 0xb8000, scr, 80 * 25 * 2);
regs.w.ax = 0x0200;
regs.h.bh = 0;
regs.h.dl = 0;
regs.h.dh = 23;
int386(0x10, (const union REGS *) ®s, ®s); // Set text pos
_settextposition(24, 1);
exit(0);
}
/*
===============
=
= I_ZoneBase
=
===============
*/
byte *I_ZoneBase(int *size)
{
int meminfo[32];
int heap;
int i;
int block;
byte *ptr;
memset(meminfo, 0, sizeof(meminfo));
segread(&segregs);
segregs.es = segregs.ds;
regs.w.ax = 0x500; // get memory info
regs.x.edi = (int) &meminfo;
int386x(0x31, ®s, ®s, &segregs);
heap = meminfo[0];
printf("DPMI memory: 0x%x, ", heap);
do
{
heap -= 0x10000; // leave 64k alone
if (heap > 0x800000)
heap = 0x800000;
ptr = malloc(heap);
}
while (!ptr);
printf("0x%x allocated for zone\n", heap);
if (heap < 0x180000)
I_Error("Insufficient DPMI memory!");
#if 0
regs.w.ax = 0x501; // allocate linear block
regs.w.bx = heap >> 16;
regs.w.cx = heap & 0xffff;
int386(0x31, ®s, ®s);
if (regs.w.cflag)
I_Error("Couldn't allocate DPMI memory!");
block = (regs.w.si << 16) + regs.w.di;
#endif
*size = heap;
return ptr;
}
/*
=============================================================================
DISK ICON FLASHING
=============================================================================
*/
void I_InitDiskFlash(void)
{
#if 0
void *pic;
byte *temp;
pic = W_CacheLumpName("STDISK", PU_CACHE);
temp = destscreen;
destscreen = (byte *) 0xac000;
V_DrawPatchDirect(SCREENWIDTH - 16, SCREENHEIGHT - 16, 0, pic);
destscreen = temp;
#endif
}
// draw disk icon
void I_BeginRead(void)
{
#if 0
byte *src, *dest;
int y;
if (!grmode)
return;
// write through all planes
outp(SC_INDEX, SC_MAPMASK);
outp(SC_INDEX + 1, 15);
// set write mode 1
outp(GC_INDEX, GC_MODE);
outp(GC_INDEX + 1, inp(GC_INDEX + 1) | 1);
// copy to backup
src = currentscreen + 184 * 80 + 304 / 4;
dest = (byte *) 0xac000 + 184 * 80 + 288 / 4;
for (y = 0; y < 16; y++)
{
dest[0] = src[0];
dest[1] = src[1];
dest[2] = src[2];
dest[3] = src[3];
src += 80;
dest += 80;
}
// copy disk over
dest = currentscreen + 184 * 80 + 304 / 4;
src = (byte *) 0xac000 + 184 * 80 + 304 / 4;
for (y = 0; y < 16; y++)
{
dest[0] = src[0];
dest[1] = src[1];
dest[2] = src[2];
dest[3] = src[3];
src += 80;
dest += 80;
}
// set write mode 0
outp(GC_INDEX, GC_MODE);
outp(GC_INDEX + 1, inp(GC_INDEX + 1) & ~1);
#endif
}
// erase disk icon
void I_EndRead(void)
{
#if 0
byte *src, *dest;
int y;
if (!grmode)
return;
// write through all planes
outp(SC_INDEX, SC_MAPMASK);
outp(SC_INDEX + 1, 15);
// set write mode 1
outp(GC_INDEX, GC_MODE);
outp(GC_INDEX + 1, inp(GC_INDEX + 1) | 1);
// copy disk over
dest = currentscreen + 184 * 80 + 304 / 4;
src = (byte *) 0xac000 + 184 * 80 + 288 / 4;
for (y = 0; y < 16; y++)
{
dest[0] = src[0];
dest[1] = src[1];
dest[2] = src[2];
dest[3] = src[3];
src += 80;
dest += 80;
}
// set write mode 0
outp(GC_INDEX, GC_MODE);
outp(GC_INDEX + 1, inp(GC_INDEX + 1) & ~1);
#endif
}
/*
=============
=
= I_AllocLow
=
=============
*/
byte *I_AllocLow(int length)
{
byte *mem;
// DPMI call 100h allocates DOS memory
segread(&segregs);
regs.w.ax = 0x0100; // DPMI allocate DOS memory
regs.w.bx = (length + 15) / 16;
int386(DPMI_INT, ®s, ®s);
// segment = regs.w.ax;
// selector = regs.w.dx;
if (regs.w.cflag != 0)
I_Error("I_AllocLow: DOS alloc of %i failed, %i free",
length, regs.w.bx * 16);
mem = (void *) ((regs.x.eax & 0xFFFF) << 4);
memset(mem, 0, length);
return mem;
}
/*
============================================================================
NETWORKING
============================================================================
*/
/* // FUCKED LINES
typedef struct
{
char priv[508];
} doomdata_t;
*/// FUCKED LINES
#define DOOMCOM_ID 0x12345678l
/* // FUCKED LINES
typedef struct
{
long id;
short intnum; // DOOM executes an int to execute commands
// communication between DOOM and the driver
short command; // CMD_SEND or CMD_GET
short remotenode; // dest for send, set by get (-1 = no packet)
short datalength; // bytes in doomdata to be sent
// info common to all nodes
short numnodes; // console is allways node 0
short ticdup; // 1 = no duplication, 2-5 = dup for slow nets
short extratics; // 1 = send a backup tic in every packet
short deathmatch; // 1 = deathmatch
short savegame; // -1 = new game, 0-5 = load savegame
short episode; // 1-3
short map; // 1-9
short skill; // 1-5
// info specific to this node
short consoleplayer;
short numplayers;
short angleoffset; // 1 = left, 0 = center, -1 = right
short drone; // 1 = drone
// packet data to be sent
doomdata_t data;
} doomcom_t;
*/// FUCKED LINES
extern doomcom_t *doomcom;
/*
====================
=
= I_InitNetwork
=
====================
*/
void I_InitNetwork(void)
{
int i;
i = M_CheckParm("-net");
if (!i)
{
//
// single player game
//
doomcom = malloc(sizeof(*doomcom));
memset(doomcom, 0, sizeof(*doomcom));
netgame = false;
doomcom->id = DOOMCOM_ID;
doomcom->numplayers = doomcom->numnodes = 1;
doomcom->deathmatch = false;
doomcom->consoleplayer = 0;
doomcom->ticdup = 1;
doomcom->extratics = 0;
return;
}
netgame = true;
doomcom = (doomcom_t *) atoi(myargv[i + 1]);
//DEBUG
doomcom->skill = startskill;
doomcom->episode = startepisode;
doomcom->map = startmap;
doomcom->deathmatch = deathmatch;
}
void I_NetCmd(void)
{
if (!netgame)
I_Error("I_NetCmd when not in netgame");
DPMIInt(doomcom->intnum);
}
int i_Vector;
externdata_t *i_ExternData;
boolean useexterndriver;
//=========================================================================
//
// I_CheckExternDriver
//
// Checks to see if a vector, and an address for an external driver
// have been passed.
//=========================================================================
void I_CheckExternDriver(void)
{
int i;
if (!(i = M_CheckParm("-externdriver")))
{
return;
}
i_ExternData = (externdata_t *) atoi(myargv[i + 1]);
i_Vector = i_ExternData->vector;
useexterndriver = true;
}
//=========================================================================
//
// I_ReadExternDriver
//
// calls the external interrupt, which should then update i_ExternDriver
//=========================================================================
void I_ReadExternDriver(void)
{
event_t ev;
if (useexterndriver)
{
DPMIInt(i_Vector);
}
}