How to speed up parallel port ?

[nbucska]

In one application I am using an 800 MHz Pentium desktop computer under DOS. I use the printer port to interface to some custom hardware only i.e. no printer is connected.

I observed that the write operation to the port takes about 1 microsec i,e, 800 clock cycles. This seriously limits the performance of the system.

What controls the speed of the parallel port and how can it be speeded it up?.

[Intel_Software_Netw1]

Hello,

Thank you for posting your question on the Intel Software Network forum. This forum is dedicated to the discussions related to software and software development, and therefore may not be monitored by engineering resources related to the hardware design question to which you seek answers.

For an accurate and timely response, you may wish to consult the Hardware Design Web site at http://www.intel.com/design/. To reach the hardware design support team, click the Site Assistance & Feedback link. Also, click the Support & Downloads from the top navigation menu.

I hope this gives you the information you need to help you resolve your issue.

Best regards,
Jim A
IntelSoftware NetworkSupport
http://www.intel.com/software
Contact us

[nbucska]

Jim A: On start-up the delay of the parallel port is initiated so the speed is the same independently from the system clock speed. I am asking for the details of this initiation i.e. the software which determines the speed of the parrallel port.

[Jim_A_Intel]

Hello,

Thank you for the follow-up question. I will run your question by our engineering team. I will post updated information as soon as I receive it.

Best regards,
Jim A
IntelSoftware NetworkSupport
http://www.intel.com/software
Contact us

[nbucska]

Jaarndt:

Unfortunatelly the www.int????/desing site needs specific type number and

is not set up to answer general questions.

Perhaps you could help me by mailing to me the I/O map

used by PENTIUMs ?

Message Edited by nbucska on 06-19-200601:00 PM

[Intel_Software_Netw1]

Hello Nbucska,

You can obtain technical documentationincluding data sheets and design guides for the Intel Pentium 4 Processor Family at http://www.intel.com/design/Pentium4/documentation.htm

Best regards,
Jim A
IntelSoftware NetworkSupport
http://www.intel.com/software
Contact us

[nbucska]

Jim A:

Thank you, it looks like it has all I want to know, of course it will

take some time to digest it and see if I need more help. Thanks again --

Nick.