[DUG] Controlling PC Hardware Ports

[Tim Perry]

Definitely rules out windows, when was working in military in UK  it also
ruled out any time-sliced OS/Processor.

 

Do a search on why the first generation of Patriot Missiles missed (I recall
that was a CPU problem).

 

 BTW is it still true that some missiles are still the only machine that
uses software to predict the future? It's been that long since I have seen a
line of code .....

 

Tim

 

From: delphi-bounces at delphi.org.nz [mailto:delphi-bounces at delphi.org.nz] On
Behalf Of Myles Penlington
Sent: Friday, 10 October 2008 4:34 p.m.
To: NZ Borland Developers Group - Delphi List; rohit at cfl.co.nz
Subject: Re: [DUG] Controlling PC Hardware Ports

 

That probably rules out using windows.

Would have to run at real time priority, and I have no idea what accuracy
that will give you.

In fact you may have to write your own kernel mode driver for that kind of
stuff.

 

It's not exactly what windows was designed to do. There are other real time
OS out there.

 

Myles.

 

From: delphi-bounces at delphi.org.nz [mailto:delphi-bounces at delphi.org.nz] On
Behalf Of Colin/Mina
Sent: Friday, 10 October 2008 4:28 p.m.
To: rohit at cfl.co.nz; NZ Borland Developers Group - Delphi List
Subject: Re: [DUG] Controlling PC Hardware Ports

 

Thanks, but I forgot to mention that I need sub-millisecond accuracy hence
wanting to use the 'scope.

 

Probably rules out using a standard Coms driver too.

 

Cheers

 

   Colin 

----- Original Message ----- 

From: Rohit Gupta <mailto:rohit at cfl.co.nz>  

To: NZ Borland Developers <mailto:delphi at delphi.org.nz>  Group - Delphi List


Sent: Friday, October 10, 2008 3:53 PM

Subject: Re: [DUG] Controlling PC Hardware Ports

 

The other thing to do is to log the timing (current time) to a log file 

Colin/Mina wrote: 

Hi,

 

  I want to monitor some code to ensure that I have some timing correct. I
was hoping to hook my oscilloscope to a readily available electrical signal
(Such as Serial Port RTS) and to add instructions in my code to set and
clear the appropriate modem port.

 

  Unfortunately the old Turbo Pascal instructions that allowed this, eg 

                Port[$2FC] := 2)                // Set b2 of Modem Register
and 

                Port[$2FC] := NOT 2)        // Clear b2 of Modem Register 

 

     but these don't appear to be available in Delphi (not in D5 anyway).

 

  Any solutions please?

 

Thanks

 

     Colin



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-- 

Rohit Gupta

B.E. Elec.   M.E.   Mem IEEE    Associate IEE

Technical Manager

Computer Fanatics Limited

 

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