[DUG] Controlling PC Hardware Ports

[Myles Penlington]

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 Group - Delphi List
<mailto:delphi at delphi.org.nz>  

	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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