8086 software interrupt question

[ronak shah]

8086 has ivt of 1kbyte that we know.
0-5 interrupts r for NMI.
6-31 interrupts r for SOFTWARE INTERRUPT.

in ASM v can genrate 33-255 interrupt using INT xx instrustion that i know.
may to explain me in "C" how to use 33 to 255 no. of interrupt??
is it possible???
plz reply...
m waiting...

 

[FvM]

Depends on your C compiler. Most have inline assembler (e.g. Borland/Paradigm, OpenWatcom) instructions or library
functions to call an interrupt. Check your compiler docs.

Apart from calling the interrupt function, you can of course set up hardware interrupts and make them execute your
function code, also in C or other high level language.

 

[ronak shah]

m using Paradigm for am186 it has achit. of 8086 .
may I know which inline keyword is used for generating software interrupt???

 

[bassa]

Hi,

check this link

regards
bassa

 

[betwixt]

Well, believe it or not, the instruction is 'INT xx' where xx is the interrupt number. You can use it to fake hardware interrupts as well but beware it may crash the system if you do.

There is also an 'INTO' instruction which causes an interrupt to jump to the vector at 0x10 when an overflow occurs. You can use it to trap arithmetic or logical overflow conditions.

Brian.