It sounds like he is trying to adopt some MSDOS code into LinuxCNC??

That looks like MSDOS assembler to initiate a soft interrupt.

 >>http://en.wikipedia.org/wiki/INT_%28x86_instruction%29

Assembler .. yep I remember doing some of that on 6800 Micros.. Very 
tedious.

Dave


On 1/14/2014 6:34 AM, andy pugh wrote:
> Someone on the forum is trying to write a driver for some onboard GPIO
> that needs to be enabled via an INT 15. The sample assembler is:
>
> MOV AX, 6F08H        Sets the digital port as input
> INT 15H                     Initiates the INT 15H
>
> Is it reasonable/legitimate to do this with inline assembler in a .comp file?
>
> Having never tried to use inline assembler, what would it look like? I
> guess we need to put ax back to where it was afterwards?
>
> Is there  a linux system call to achieve the same result?
>

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