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On Monday, 2018-03-26 at 06:09 +0200, Carlos E. R. via Lazarus wrote:
On 2018-03-26 04:02, Donald Ziesig via Lazarus wrote:
Hi Everyone!
I am using Lazarus 1.8 on Linux Mint. I would like to use the
Windows.Beep( Freq, Duration) function, or (if not available)
SysUtils.Beep subprograms.
AFAIK, you can not call Windows functions in Linux.
Further, my understanding is that the loudspeaker is associated to the
terminal in Linux. You can not thus beep from a daemon, something that
would be useful. We apparently do not get access to program the chip as in
MsDOS, nor freq,duration.
Here I post an attempt I did back on 2005. It doesn't compile, and this
moment I can't check why. Nor, of course, do I remember what I was trying.
program beeper;
uses linux;
var
Saved43, Saved61: byte;
LoadClock: word;
frequency: word;
duration: real;
RequestedDuration, RemainingDuration: timespec;
hh,mm,ss, msec, usec: word;
begin
(*
if paramcount <> 2 then begin
writeln('Produces a beep of the indicated frequency and
duration.');
writeln('Usage: beeper frequency duration');
halt(1);
end;
frequency:= round(ParamStr(1));
duration:= ParamStr(2);
*)
frequency:= 500;
duration:= 1.2;
RequestedDuration.tv_sec:= trunc(duration);
RequestedDuration.tv_nsec:= trunc(frac(duration)*1e9);
{ioperm(from, num, value)}
writeln($61, ' ', $42);
writeln(ioperm($61, 1, 1), ' ', ioperm($42, 2, 1));
{timer prepare}
ReadPort($43, Saved43);
writeln('43h', ' ', Saved43);
writeport($43, byte($B6)); {Channel 2, LSB/MSB}
LoadClock:= 1193180 div frequency;
writeport($42, Lo(LoadClock));
writeport($42, Hi(LoadClock));
ReadPort($61, Saved61);
writeln('61h', ' ', Saved61);
writeport($61, byte(Saved61 or $3)); {Speaker on}
{Select(0, nil, nil, nil, 1000);}
gettime(hh,mm,ss, msec, usec);
writeln(hh,':', mm, ':', ss, '.', msec, ' ', usec);
nanosleep(RequestedDuration, RemainingDuration);
gettime(hh,mm,ss, msec, usec);
writeln(hh,':', mm, ':', ss, '.', msec, ' ', usec);
writeport($61, Saved61); {Speaker off}
end.
I also have copies of some c code I got from fidonet posts that I can look
at another day, in assembler. I don't remember if they worked, probably
not.
- --
Cheers,
Carlos E. R.
(from openSUSE 42.3 x86_64 "Malachite" at Telcontar)
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