China DOS Union

Windows has power-saving mode, and the display can be automatically turned off when not in use for a long time. Then, can DOS do that? It's best to implement it with TC.
I found a dpmsave.exe. As soon as I run it, it turns off the display, and pressing any key turns it on. I don't know how to implement it.

Where are the experts?

Is it big or not? Can't you just take a look at the anti-Jiang compilation? It seems to be implemented by calling INT 10H. Specifically, I forgot!

I wrote such a program 6 years ago, calling the 4F10H sub-interrupt of INT 10H.

#include <dos.h>

main()

{

   union REGS in,out;

   /* Close monitor*/

   in.x.ax=0x4f10;

   in.x.bl=0x01;

   in.x.bh=0x02;

   int86(0x10,&in,&out);



   /* Press any key to continue*/

   getch();



   /* Turn on monitor */

   in.x.ax=0x4f10;

   in.x.bl=0x01;

   in.x.bh=0x0;

   int86(0x10,&in,&out);

   return;

}

[ Last edited by JonePeng on 2006-4-11 at 22:39 ]

Meddlesome
Press with hand and also tap the keyboard twice...

Originally posted by xuantian at 2006-4-16 23:43:
Meddlesome
It's two keystrokes less to press with the hand....

Makes sense. Anyway, since I have to execute this program manually every time, it's better to just press the monitor power button, heh

Re xuantian ＆ asbai:

Your ideas are relatively one-sided.

What if the monitor's buttons fail or break?

The small program I made is to solve the problem of the second-hand monitor buttons I used before.

In addition, you can also create a shortcut of this program under Windows and place it in the quick launch bar of the taskbar, so that you can click this icon to avoid pressing the monitor switch.

Can we write it in a way of port reading and writing????

Can the monitor be directly turned on when booting? My monitor button is broken. It can't be turned on after being turned off.

Originally posted by waynebeat at 2006-5-17 14:51:
Can the monitor
be turned on directly when booting?
My monitor button is broken
and it can't be turned on after being turned off.

Hehe, then don't turn off the monitor after shutting down.

```c
void crtoff()/*Turn off the display*/
{
int crtflag;/*Flag indicating whether the display supports power-saving mode*/
union REGS inregs,outregs;
inregs.x.ax=0x4f10;
inregs.x.bx=0;
int86(0x10,&inregs,&outregs);
if(outregs.h.al==0x4f)/*If the display supports power-saving mode, turn it off*/
{
inregs.x.ax=0x4f10;
inregs.x.bx=0x0201;
int86(0x10,&inregs,&outregs);
inregs.x.ax=0x4f10;
inregs.x.bx=0x0301;
int86(0x10,&inregs,&outregs);
crtflag=1;
}
else /*Otherwise, disable display refresh*/
{
inregs.x.ax=0x1201;
inregs.h.bl=0x36;
int86(0x10,&inregs,&outregs);
crtflag=0;
}
while(bioskey(1)==0&&Minf==0) /*Wait for keyboard or mouse information to turn on the display*/
GetMouseState(&Minf);
if(crtflag)/*If the display supports power-saving mode, turn it on*/
{
inregs.x.ax=0x4f10;
inregs.x.bx=0x1;
int86(0x10,&inregs,&outregs);
}
else/*Otherwise, allow display refresh*/
{
inregs.x.ax=0x1200;
inregs.h.bl=0x36;
int86(0x10,&inregs,&outregs);
}
}
```

I'm not very familiar with assembly!

```c
#define DPMS_ON 0
#define DPMS_WAIT 1
#define DPMS_SUSPEND 2
#define DPMS_OFF 4

//---------------------------------------------------------------------------
// Set DPMS status
//
// Set the monitor energy-saving status
//---------------------------------------------------------------------------
BYTE yana_SetDPMSStatus(BYTE Act)
{
union REGS r;

r.w.ax = 0x4F10;
r.h.bl = 1;
r.h.bh = Act;
int386(0x10, &r, &r);
return (r.h.al == 0x4F); // If AL != 4Fh, return FALSE
}
```

Is there any way to test the above code?

Sorry, I really don't understand C language programming. Even if I have the code, I don't know how to test it!