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-
-
- /* works with Microsoft C V6.0, PC with EGA */
-
- #include <stdio.h>
- #include <dos.h>
-
- void cchar(int chr, int color, int background, int blink, int page);
-
- #define BLACK O
- #define BLUE 1
- #define GREEN 2
- /* etc. */
-
- void main()
- {
- printf("%c", 65); /* prints 'A' */
- printf("%c", l); /* prints smiley face */
-
- printf("%c", 7); /* rings bell */
- putchar(7); /* rings bell */
-
- /* above functions call DOS (probably via INT 21H), which
- ** executes some control codes with their traditional meaning.
- */
-
- /* now bypass DOS and use ROM-BIOS * /
- cchar(7, GREEN, BLACK, 1, 0); /* blinking green diamond */
- }
-
-
- /* color character at present cursor location */
- void cchar( int chr, int color, int background, int blink, int page)
- {
- union REGS regs;
-
- regs.h.ah = 9; /* write character function */
- regs.h.al = chr; /* character code */
- /* attribute */
- regs.h.bl = (blink ? Ox80 : 0) | ((background & 7) << 4) | (color & 0x0f);
- regs.h.bh = page; /* display page */
- regs.x.cx = l; /* repetition count */
- int86(0xlO, ®s, ®s); /* call BIOS video function */
- }
-
-