Example of BorlandC inline ASM

borland.c

//--------------------------------------------------------------------------
// FarRead()
//-------------------------------------------------------------------------
boolean FarRead (int handle, char far *dest, long length)
{
        if (length>0xffffl)
                TrashProg("FarRead doesn't support 64K reads yet!");

asm             push    ds
asm             mov     bx,[handle]
asm             mov     cx,[WORD PTR length]
asm             mov     dx,[WORD PTR dest]
asm             mov     ds,[WORD PTR dest+2]
asm             mov     ah,0x3f                         // READ w/handle
asm             int     21h
asm             pop     ds
asm             jnc     good
//      errno = _AX;
        return  false;
good:
asm             cmp     ax,[WORD PTR length]
asm             je      done
//      errno = EINVFMT;                        // user manager knows this is bad read
        return  false;
done:
        return  true;
}