ref: a88630d07570f7e9a30098817db9efe32307a776
dir: /vl.h/
#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 SCREENSEG 0xa000
#define SCREENWIDTH 80 // default screen width in bytes
#define MAXSCANLINES 200 // size of ylookup table
#define TILEWIDTH 4
//===========================================================================
extern u16int bufferofs; // all drawing is reletive to this
extern u16int displayofs,pelpan; // last setscreen coordinates
extern u16int screenseg; // set to 0xa000 for asm convenience
extern u16int linewidth;
extern u16int ylookup[MAXSCANLINES];
extern int screenfaded;
extern u16int bordercolor;
//===========================================================================
//
// VGA hardware routines
//
#define VGAWRITEMODE(x) asm{\
cli;\
mov dx,GC_INDEX;\
mov al,GC_MODE;\
out dx,al;\
inc dx;\
in al,dx;\
and al,252;\
or al,x;\
out dx,al;\
sti;}
#define VGAMAPMASK(x) asm{cli;mov dx,SC_INDEX;mov al,SC_MAPMASK;mov ah,x;out dx,ax;sti;}
#define VGAREADMAP(x) asm{cli;mov dx,GC_INDEX;mov al,GC_READMAP;mov ah,x;out dx,ax;sti;}
void VL_SetVGAPlane (void);
void VL_WaitVBL (s16int vbls);
void VL_CrtcStart (s16int crtc);
void VL_FillPalette (s16int red, s16int green, s16int blue);
void VL_SetColor (s16int color, s16int red, s16int green, s16int blue);
void VL_GetColor (s16int color, s16int *red, s16int *green, s16int *blue);
void VL_FadeOut (s16int start, s16int end, s16int red, s16int green, s16int blue, s16int steps);
void VL_FadeIn (s16int start, s16int end, u8int far *palette, s16int steps);
void VL_ColorBorder (s16int color);
void VL_Plot (s16int x, s16int y, s16int color);
void VL_Hlin (u16int x, u16int y, u16int width, u16int color);
void VL_Vlin (s16int x, s16int y, s16int height, s16int color);
void VL_Bar (s16int x, s16int y, s16int width, s16int height, s16int color);
void VL_DrawPicBare (s16int x, s16int y, u8int far *pic, s16int width, s16int height);
void VL_MemToLatch (u8int far *source, s16int width, s16int height, u16int dest);
void VL_ScreenToScreen (u16int source, u16int dest,s16int width, s16int height);
void VL_MemToScreen (u8int far *source, s16int width, s16int height, s16int x, s16int y);
void VL_MaskedToScreen (u8int far *source, s16int width, s16int height, s16int x, s16int y);
void VL_DrawTile8String (char *str, char far *tile8ptr, s16int printx, s16int printy);
void VL_DrawLatch8String (char *str, u16int tile8ptr, s16int printx, s16int printy);
void VL_SizeTile8String (char *str, s16int *width, s16int *height);
void VL_DrawPropString (char *str, u16int tile8ptr, s16int printx, s16int printy);
void VL_SizePropString (char *str, s16int *width, s16int *height, char far *font);
void VL_TestPaletteSet (void);