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Diffstat (limited to 'src/heretic/i_ibm.c')
| -rw-r--r-- | src/heretic/i_ibm.c | 1650 |
1 files changed, 1650 insertions, 0 deletions
diff --git a/src/heretic/i_ibm.c b/src/heretic/i_ibm.c new file mode 100644 index 00000000..cf668680 --- /dev/null +++ b/src/heretic/i_ibm.c @@ -0,0 +1,1650 @@ +// Emacs style mode select -*- C++ -*- +//----------------------------------------------------------------------------- +// +// Copyright(C) 1993-1996 Id Software, Inc. +// Copyright(C) 1993-2008 Raven Software +// Copyright(C) 2008 Simon Howard +// +// 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" +#include "v_video.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(); +} + + +/* +=============== += += 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); + } +} |