interrupt error

[maifs]

hi dear!

i am trying this but some errors are generated.
help me in correcting that.
for example :1st error is that cant convert void <interrupt far*> <...> to void <interrupt far*><>

#include<dos.h>
#include<conio.h>
void interrupt (*old) ();
void interrupt newint();
char far *scr = (char far*) 0x00400017;

void main()
{
	clrscr();
	old = getvect(0x08);
	setvect(0x08,newint);
	keep(0,1000);
	getch();
}
void interrupt newint()
{
	*scr = 64;
	(*old) ();
}

[matsp]

It would help if you give the line-number that the error is on.

Also, are you ACTUALLY doing this in a DOS (or dos-like) system, or are you running this in Windows?

You may want to set the vector back again before you exit too!

If you want to turn on NumLock or some such, there are probably better ways to do that.

--
Mats

[stevesmithx]

What compiler are you using?. Is it TurboC?
Also unless you have valid reason to learn TSR, don't learn it as they are obsolete nowadays.

You may want to set the vector back again before you exit too!

But isn't that handled here?

void interrupt newint()
{
	*scr = 64;
	(*old) ();
}

[maifs]

i am using in turbo c
and the os is windows xp.

error is generated in
old = getvect(0x08);
setvect(0x08,newint);

these two line

[maifs]

i am studing system programing so thats why i am asking for this.

no any more reason

[stevesmithx]

i am using in turbo c

Then i think you are probably using an older version version of Turbo C.
Compiles fine for me in Turbo C ver 3.0 though.

and the os is windows xp.

Then you probably need a real DOS and not just an emulation to see the output, i think.

[maifs]

yes i am using turbo c version 3.0 .

do you mean to say that in windows xp i cant run it.

and in windows 95 or 98 i can run it.

[Elysia]

Windows XP does not run in a DOS-environment. The fact that it provides DOS prompts at all is because it emulates DOS environment - to a degree at least.
You would have to use DOS itself or an earlier OS at least to use the "real" DOS.

[stevesmithx]

do you mean to say that in windows xp i cant run it.

and in windows 95 or 98 i can run it.

Probably, yes.

[maifs]

thx
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