mode13h

Is it possible to get into Mode13h in Borland C++ 5.01, or Dev-C++ 4.0.. If so, how? :'(

Here's some "borrowed" code you can use as a function:

void Set_Graphics_Mode(int mode)
{

// use the video interrupt 10h and the C interrupt function to set
// the video mode

union REGS inregs,outregs;

inregs.h.ah = 0; // set video mode sub-function
inregs.h.al = (unsigned char)mode; // video mode to change to

int86(0x10, &inregs, &outregs);

} // end Set_Graphics_Mode


In your programs, you could do as such:

#define GRAPHICS_MODE13 0x13
#define TEXT_MODE 0x03

And to use the function:

Set_Graphics_Mode(GRAPHICS_MODE13)

Hope that helps ;-)

Hi, could you explain these three lines:

inregs.h.ah = 0; // set video mode sub-function
inregs.h.al = (unsigned char)mode; // video mode to change to

int86(0x10, &inregs, &outregs);


i don't understand what i'm looking at, I can see that prior to the above lines a union was defined but whats the .h.ah stuff?

>inregs.h.ah = 0; // set video mode sub-function
>inregs.h.al = (unsigned char)mode; // video mode to change to

Here the variables are put into the registers.

Forgot to explain. The AL and AH are parts of register AX. If you don't know what I'm talking about, take a look at here

http://www.technology.niagarac.on.ca.../assembler.htm

>int86(0x10, &inregs, &outregs);

Here the interrupt 10h is called with the required values in the registers passed.

If you can use assembler in you code (TASM) you can do this:

Code:

---

void SetGraphicsMode()
{
  asm mov ax, 0x13;
  asm int 0x10;
}

void SetTextMode()
{
  asm mov ax, 0x03;
  asm int 0x10;
}

---

You MUST call SetTextMode when you exit your program, it might crash otherwise...

Thanks Shiro, are the int86() function and the "REGS" macro (from: "union REGS inregs,outregs;") defined in the dos.h header file?