Plz, help about floating-point programming !

[gaique]

In usual case, the result of floating-point division by 0 is infinite. I 'd like to detect by interrupt when some value is divided by 0. Besides, I want to catch an interrupt and print out any message in this case.
I am a freshman in ASM so plz help me solve this problem.
Thank you very much !

 

[earthandfire]

I'm not sure if this applies to the FPU, but Int 0 is the Divide By Zero interrupt on the x86 family of processors.

To trap this you would need to place the address of your handler in the four bytes at memory locations 00 to 03.

(Keep a copy of the orignal value at that address and restore it when your program terminates - by the way, you would also need to disable interrupts while you are changing the address)


Hope this helps.

 

[gaique]

Can you give some more detail (code) ?!?

 

[TessaBonting]

The floating point processor has its own interrupt number on the processor from 386+.
The number is 16h

Succes, Tessa