Mail Archives: cygwin/2000/04/04/13:45:35
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On Tue, Apr 04, 2000 at 02:31:33AM -0700, Michele Liberi wrote:
>Windows has a system function that Beeps the internal speaker...
>
>... but it simply doesn't work!
>
>The two parameters, Pitch and Duration, are ignored and the same sound is
>always produced.
>
>I found a little assembler code for beeping the speaker, but I don't succeed
>to get it compiled with gcc 2.95.2.
>
>the code is:
>(turn internal speaker OFF)
>in al,61
>and al,252
>out 61,al
>
>(turn internal speaker ON)
>in al,61
>or al,3
>out 61,al
>
>I coded it as follows:
>
>asm("in %al,61");
>asm("and %al,252");
>asm("out 61,%al");
>
>asm(
>"in %al,61\n"
>"or %al,3\n"
>"out 61,%al\n"
>);
>
>but I obtain the following error:
>...: Assembler messages:
>...: Error: suffix or operands invalid for `in'
>...: Error: suffix or operands invalid for `out'
>...: Error: suffix or operands invalid for `in'
>...: Error: suffix or operands invalid for `out'
>
>and NOW the questions:
>1) What's wrong with the code I wrote? Why gcc complains?
>2) Is it possible to do the same work with C without using asm?
>3) Is there any way to link objects produced with other C compilers?
> for example Borland C has embedded inp and outp functions
>
>Any link to information available on the internet is welcome.
>
>any help will be appreciated.
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