| 10,29 → 10,51 |
|---|
| #include <dos.h> |
| #include "video.h" /* include self for control */ |
| |
| /* pointers to VGA/MDA screens */ |
| static unsigned short far *vga = (unsigned short far *)0xB8000000L; |
| static unsigned short far *mda = (unsigned short far *)0xB0000000L; |
| /* pointer to the VGA/MDA screen */ |
| static unsigned short far *scr = (unsigned short far *)0xB8000000L; |
| |
| void video_clear(unsigned short attr, int offset) { |
| int x; |
| for (x = offset; x < 2000; x++) { |
| vga[x] = attr; |
| mda[x] = attr; |
| scr[x] = attr; |
| } |
| } |
| |
| /* inits screen, returns 0 for color mode, 1 for mono */ |
| int video_init(void) { |
| union REGS r; |
| int monoflag; |
| /* get current video mode to detect color (7 = mono, anything else is color) */ |
| r.h.ah = 0x0F; |
| int86(0x10, &r, &r); |
| /* set the monoflag to detected value and prepare the next mode we will set */ |
| if (r.h.al == 7) { |
| monoflag = 1; |
| r.h.al = 7; /* 80x25 2 colors (MDA / Hercules) */ |
| scr = (unsigned short far *)0xB0000000L; |
| } else if (r.h.al == 2) { /* 80x25 grayscale */ |
| monoflag = 1; |
| r.h.al = 2; /* 80x25 grayscale */ |
| scr = (unsigned short far *)0xB8000000L; |
| } else { |
| monoflag = 0; |
| r.h.al = 3; /* 80x25 16 colors */ |
| scr = (unsigned short far *)0xB8000000L; |
| } |
| /* (re)set video mode to be sure what we are dealing with */ |
| r.h.ah = 0; |
| int86(0x10, &r, &r); |
| return(monoflag); |
| } |
| |
| void video_putchar(int y, int x, unsigned short attr, int c) { |
| int offset = (y << 6) + (y << 4) + x; |
| vga[offset] = attr | c; |
| mda[offset] = attr | c; |
| scr[(y << 6) + (y << 4) + x] = attr | c; |
| } |
| |
| void video_putcharmulti(int y, int x, unsigned short attr, int c, int repeat, int step) { |
| int offset = (y << 6) + (y << 4) + x; |
| while (repeat-- > 0) { |
| vga[offset] = attr | c; |
| mda[offset] = attr | c; |
| scr[offset] = attr | c; |
| offset += step; |
| } |
| } |
| 40,10 → 62,7 |
|---|
| void video_putstring(int y, int x, unsigned short attr, char *s) { |
| x += (y << 6) + (y << 4); /* I use x as an offset now */ |
| while (*s != 0) { |
| unsigned short b = attr | *s; |
| vga[x] = b; |
| mda[x] = b; |
| x++; |
| scr[x++] = attr | *s; |
| s++; |
| } |
| } |
| 51,12 → 70,8 |
|---|
| void video_putstringfix(int y, int x, unsigned short attr, char *s, int w) { |
| x += (y << 6) + (y << 4); /* I use x as an offset now */ |
| while (w-- > 0) { |
| unsigned short b; |
| b = attr | *s; |
| scr[x++] = attr | *s; |
| if (*s != 0) s++; |
| vga[x] = b; |
| mda[x] = b; |
| x++; |
| } |
| } |
| |