ASRock Forums : Questions about Parallel port https://forum.asrock.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Mon, 22 Jun 2026 21:24:31 +0000 Mon, 23 Jan 2017 08:42:38 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 https://forum.asrock.com/RSS_post_feed.asp?TID=4275 <![CDATA[ASRock Forums]]> https://forum.asrock.com/forum_images/web_wiz_forums_black.png https://forum.asrock.com/ <![CDATA[Questions about Parallel port : Too Normal and Bi-Directional...]]> https://forum.asrock.com/forum_posts.asp?TID=4275&PID=22419&title=questions-about-parallel-port#22419 Author: wardog
Subject: 4275
Posted: 23 Jan 2017 at 8:42am

Too Normal and Bi-Directional are as they appear.

Bi-Directional is two way communications.


If you're doing a LPT project, these two items should have been covered in the the 1st chapter!?!


]]> Mon, 23 Jan 2017 08:42:38 +0000 https://forum.asrock.com/forum_posts.asp?TID=4275&PID=22419&title=questions-about-parallel-port#22419 <![CDATA[Questions about Parallel port : Xaltar wrote:I&#039;ts been...]]> https://forum.asrock.com/forum_posts.asp?TID=4275&PID=22418&title=questions-about-parallel-port#22418 Author: wardog
Subject: 4275
Posted: 23 Jan 2017 at 8:37am

Originally posted by Xaltar Xaltar wrote:

I'ts been a very long time since I played with parallel ports Big smile


Me too. And Amen for that fact.


And having said that I'll point you to where I used to look for/at BIOS settings when I first got started years ago. And years ago!


TechARP's BIOS Optimization Guide on EPP 1.7 and EPP 1.9:
http://archive.techarp.com/showFreeBOG253e.html?lang=0&bogno=84






Edited by wardog - 23 Jan 2017 at 8:37am]]> Mon, 23 Jan 2017 08:37:38 +0000 https://forum.asrock.com/forum_posts.asp?TID=4275&PID=22418&title=questions-about-parallel-port#22418 <![CDATA[Questions about Parallel port : From what I remember, 1.9 was...]]> https://forum.asrock.com/forum_posts.asp?TID=4275&PID=22402&title=questions-about-parallel-port#22402 Author: Xaltar
Subject: 4275
Posted: 23 Jan 2017 at 12:04am

From what I remember, 1.9 was more advanced and handled handshaking more efficiently but was not compatible with some older devices. 1.7 retained backward compatibility with a wider range of devices but did not perform as well. 

This little write-up is rather technical but if you have any understanding of the concepts it should prove enlightening. 

http://retired.beyondlogic.org/epp/epp.htm    (copy paste link)

I'ts been a very long time since I played with parallel ports Big smile I remember setting up all kinds of weird things with parallel and COM ports back in the day, including a working link between 2 PCs. Ahh 512kb/s data rates, how far we have come. Also worth noting, 512kb/s was the maximum theoretical bandwidth, typically the best I could achieve for file transfers was about 300kb/s with high quality cables. 
]]> Mon, 23 Jan 2017 00:04:13 +0000 https://forum.asrock.com/forum_posts.asp?TID=4275&PID=22402&title=questions-about-parallel-port#22402 <![CDATA[Questions about Parallel port : Hello everyone!I bought an ASRock...]]> https://forum.asrock.com/forum_posts.asp?TID=4275&PID=22400&title=questions-about-parallel-port#22400 Author: Swoewiuf
Subject: 4275
Posted: 22 Jan 2017 at 11:49pm

Hello everyone!

I bought an ASRock motherboard a year ago, and I now have a little project requiring the use of a parallel port. (My motherboard is a B150M Pro4S.) I do have questions about this technology since it is considered "legacy" Tongue

I?�m reading a little bit about the port and its improvement through the years, but I couldn't find the answers I'm looking for.

I want to know the difference between the two following settings in the ASRock UEFI:
  • "ECP and EPP-1.9 Mode"
  • "ECP and EPP-1.7 Mode"

There are two other settings in the drop-down menu ("Normal" and "Bi-Directional" but I think those refer to older technologies (earlier days of the parallel port).

I'll keep looking for answers and I'll post it here if possible. In the meantime, please help me! :P


Edited by Swoewiuf - 22 Jan 2017 at 11:51pm]]> Sun, 22 Jan 2017 23:49:50 +0000 https://forum.asrock.com/forum_posts.asp?TID=4275&PID=22400&title=questions-about-parallel-port#22400