| 0,0 → 1,70 |
|---|
| /* |
| * Video routines used by the Svarog386 installer |
| * Copyright (C) 2016 Mateusz Viste |
| * |
| * All video routines output data directly to VRAM, and they all do that |
| * to both B8000:0000 and B0000:0000 areas simulteanously, for compatibility |
| * with all possible video adapters in all possible modes. |
| */ |
| |
| #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; |
| |
| void video_clear(unsigned short attr, int offset) { |
| int x; |
| for (x = offset; x < 2000; x++) { |
| vga[x] = attr; |
| mda[x] = attr; |
| } |
| } |
| |
| 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; |
| } |
| |
| 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; |
| offset += step; |
| } |
| } |
| |
| 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++; |
| s++; |
| } |
| } |
| |
| 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; |
| if (*s != 0) s++; |
| vga[x] = b; |
| mda[x] = b; |
| x++; |
| } |
| } |
| |
| void video_movecursor(int y, int x) { |
| union REGS r; |
| r.h.ah = 2; |
| r.h.bh = 0; |
| r.h.dh = y; |
| r.h.dl = x; |
| int86(0x10, &r, &r); |
| } |