/
i_ibm.c
1495 lines (1272 loc) · 29 KB
/
i_ibm.c
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//
// Copyright (C) 1993-1996 Id Software, Inc.
// Copyright (C) 1993-2008 Raven Software
// Copyright (C) 2016-2017 Alexey Khokholov (Nuke.YKT)
// Copyright (C) 2017 Alexandre-Xavier Labonté-Lamoureux
//
// 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.
//
// DESCRIPTION:
// IBM DOS VGA graphics and key/mouse/joystick.
//
#include <dos.h>
#include <conio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <graph.h>
#include "d_main.h"
#include "doomstat.h"
#include "doomdef.h"
#include "r_local.h"
#include "sounds.h"
#include "i_system.h"
#include "i_sound.h"
#include "g_game.h"
#include "m_misc.h"
#include "v_video.h"
#include "w_wad.h"
#include "z_zone.h"
#include "dpmiapi.h"
//
// Macros
//
#define DPMI_INT 0x31
//#define NOKBD
//#define NOTIMER
//
// Code
//
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;
//
// 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
{
return false;
}
#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;
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
void DPMIInt(int i);
void I_WaitVBL(int vbls);
void I_StartupCyberMan(void);
void I_StartupSound(void);
void I_ShutdownSound(void);
void I_ShutdownTimer(void);
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
};
typedef struct
{
int irq;
ticcmd_t cmd;
} extapi_t;
extapi_t *extcontrol;
ticcmd_t emptycmd;
ticcmd_t* I_BaseTiccmd(void)
{
if (!extcontrol)
{
return &emptycmd;
}
DPMIInt(extcontrol->irq);
return &extcontrol->cmd;
}
//
// I_GetTime
// Returns time in 1/35th second tics.
//
int I_GetTime(void)
{
return ticcount;
}
//
// 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);
}
}
//
// 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
//
//
// I_WaitVBL
//
void I_WaitVBL(int vbls)
{
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);
}
}
//
// 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, *currentscreen, *destscreen, *destview;
//
// I_UpdateBox
//
void I_UpdateBox(int x, int y, int w, int h)
{
int i, j, k, count;
int sp_x1, sp_x2;
int poffset;
int offset;
int pstep;
int step;
byte *dest, *source;
if (x < 0 || y < 0 || w <= 0 || h <= 0
|| x + w > SCREENWIDTH || y + h > SCREENHEIGHT)
{
I_Error("Bad I_UpdateBox (%i, %i, %i, %i)", x, y, w, h);
}
sp_x1 = x / 8;
sp_x2 = (x + w) / 8;
count = sp_x2 - sp_x1 + 1;
offset = y * SCREENWIDTH + sp_x1 * 8;
step = SCREENWIDTH - count * 8;
poffset = offset / 4;
pstep = step / 4;
outp(SC_INDEX, SC_MAPMASK);
for (i = 0; i < 4; i++)
{
outp(SC_INDEX + 1, 1 << i);
source = &screens[0][offset + i];
dest = destscreen + poffset;
for (j = 0; j < h; j++)
{
k = count;
while (k--)
{
*(unsigned short *)dest = (unsigned short)(((*(source + 4)) << 8) + (*source));
dest += 2;
source += 8;
}
source += step;
dest += pstep;
}
}
}
//
// I_UpdateNoBlit
//
int olddb[2][4];
void I_UpdateNoBlit(void)
{
int realdr[4];
int x, y, w, h;
// Set current screen
currentscreen = destscreen;
// Update dirtybox size
realdr[BOXTOP] = dirtybox[BOXTOP];
if (realdr[BOXTOP] < olddb[0][BOXTOP])
{
realdr[BOXTOP] = olddb[0][BOXTOP];
}
if (realdr[BOXTOP] < olddb[1][BOXTOP])
{
realdr[BOXTOP] = olddb[1][BOXTOP];
}
realdr[BOXRIGHT] = dirtybox[BOXRIGHT];
if (realdr[BOXRIGHT] < olddb[0][BOXRIGHT])
{
realdr[BOXRIGHT] = olddb[0][BOXRIGHT];
}
if (realdr[BOXRIGHT] < olddb[1][BOXRIGHT])
{
realdr[BOXRIGHT] = olddb[1][BOXRIGHT];
}
realdr[BOXBOTTOM] = dirtybox[BOXBOTTOM];
if (realdr[BOXBOTTOM] > olddb[0][BOXBOTTOM])
{
realdr[BOXBOTTOM] = olddb[0][BOXBOTTOM];
}
if (realdr[BOXBOTTOM] > olddb[1][BOXBOTTOM])
{
realdr[BOXBOTTOM] = olddb[1][BOXBOTTOM];
}
realdr[BOXLEFT] = dirtybox[BOXLEFT];
if (realdr[BOXLEFT] > olddb[0][BOXLEFT])
{
realdr[BOXLEFT] = olddb[0][BOXLEFT];
}
if (realdr[BOXLEFT] > olddb[1][BOXLEFT])
{
realdr[BOXLEFT] = olddb[1][BOXLEFT];
}
// Leave current box for next update
memcpy(olddb[0], olddb[1], 16);
memcpy(olddb[1], dirtybox, 16);
// Update screen
if (realdr[BOXBOTTOM] <= realdr[BOXTOP])
{
x = realdr[BOXLEFT];
y = realdr[BOXBOTTOM];
w = realdr[BOXRIGHT] - realdr[BOXLEFT] + 1;
h = realdr[BOXTOP] - realdr[BOXBOTTOM] + 1;
I_UpdateBox(x, y, w, h);
}
// Clear box
M_ClearBox(dirtybox);
}
//
// I_FinishUpdate
//
void I_FinishUpdate(void)
{
static int lasttic;
int tics;
int i;
if (devparm)
{
i = ticcount;
tics = i - lasttic;
lasttic = i;
if (tics > 20) tics = 20;
outpw(SC_INDEX, 0x102);
for (i = 0; i < tics; i++)
{
destscreen[(SCREENHEIGHT - 1)*SCREENWIDTH / 4 + i] = 0xff;
}
for (; i < 20; i++)
{
destscreen[(SCREENHEIGHT - 1)*SCREENWIDTH / 4 + i] = 0x0;
}
}
outpw(CRTC_INDEX, ((int)destscreen & 0xff00) + 0xc);
//Next plane
destscreen += 0x4000;
if (destscreen == (byte*)0xac000)
{
destscreen = (byte*)0xa0000;
}
}
//
// I_InitGraphics
//
void I_InitGraphics(void)
{
if (novideo)
{
return;
}
grmode = true;
regs.w.ax = 0x13;
int386(0x10, (union REGS *)®s, ®s);
pcscreen = currentscreen = (byte *)0xa0000;
destscreen = (byte *)0xa4000;
outp(SC_INDEX, SC_MEMMODE);
outp(SC_INDEX + 1, (inp(SC_INDEX + 1)&~8) | 4);
outp(GC_INDEX, GC_MODE);
outp(GC_INDEX + 1, inp(GC_INDEX + 1)&~0x13);
outp(GC_INDEX, GC_MISCELLANEOUS);
outp(GC_INDEX + 1, inp(GC_INDEX + 1)&~2);
outpw(SC_INDEX, 0xf02);
memset(pcscreen, 0, 0x10000);
outp(CRTC_INDEX, CRTC_UNDERLINE);
outp(CRTC_INDEX + 1, inp(CRTC_INDEX + 1)&~0x40);
outp(CRTC_INDEX, CRTC_MODE);
outp(CRTC_INDEX + 1, inp(CRTC_INDEX + 1) | 0x40);
outp(GC_INDEX, GC_READMAP);
I_SetPalette(W_CacheLumpName("PLAYPAL", PU_CACHE));
I_InitDiskFlash();
}
//
// 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
}
}
//
// I_ReadScreen
// Reads the screen currently displayed into a linear buffer.
//
void I_ReadScreen(byte *scr)
{
int i;
int j;
outp(GC_INDEX, GC_READMAP);
for (i = 0; i < 4; i++)
{
outp(GC_INDEX+1, i);
for (j = 0; j < SCREENWIDTH*SCREENHEIGHT/4; j++)
{
scr[i+j*4] = currentscreen[j];
}
}
}
//
// 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
//
#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;
while (1)
{
while (kbdtail < kbdhead)
{
k = keyboardque[kbdtail&(KBDQUESIZE - 1)];
kbdtail++;
printf("0x%x\n", k);
if (k == 1)
I_Quit();
}
}
}
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);
}
//
// Timer interrupt
//
//
// 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)
{
oldkeyboardisr = _dos_getvect(KEYBOARDINT);
_dos_setvect (0x8000 | KEYBOARDINT, I_KeyboardISR);
//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_StartupMouse(void)
{
//
// General mouse detection
//
mousepresent = 0;
if (M_CheckParm("-nomouse") || !usemouse)
{
return;
}
if (I_ResetMouse() != 0xffff)
{
printf("Mouse: not present\n", 0);
return;
}
printf("Mouse: detected\n", 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;
printf("joystick not found\n");
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_StartFrame
//
void I_StartFrame(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);
//
// DPMIFarCall
//
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);
}
//
// I_StartupDPMI
//
byte *I_AllocLow(int length);
void I_StartupDPMI(void)
{
extern char __begtext;