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[WriteLog] Starting over...

To: Writelog reflector <writelog@contesting.com>
Subject: [WriteLog] Starting over...
From: Garry Shapiro <garry@ni6t.com>
Date: Tue, 22 May 2007 21:18:05 -0700
List-post: <mailto:writelog@contesting.com>
Ed, K4SB made some suggestions that led to the solution of my 
unavailable parallel port problem. Ed thought the BIOS might be the 
key--and it is.

I had noted that in the Device Manager listing under Ports, my old 
computer just said "Printer Port (LPT1)" and displayed only 378-37F for 
I/O resources. But /this/ computer listed it as "ECP Printer Port" with 
a second line of I/O resources (778-77F)and showed LPT3 as "PCI SPP/BPP 
Printer Port". I had ignored this before, so I Googled the 
acronyms---ECP is Extended Capabilities Port, SPP is Standard Printer 
Port and BPP is Bidirectional Printer Port.

SPP is your basic one-way 8-bit printer control, while BPP makes it 
bidirectional. The other protocols add functionality to non-printer 
hardware setups, but apparently the interfaces and handshakes are 
different---and that is the cause of the problem.

When I opened BIOS, I found that Normal (SPP), EPP, ECP and ECP+EPP were 
all options, EPP means "Enhanced Parallel Port", and ECP+EPP had been 
selected. ECP is the villain here: neither ECP nor ECP+EPP allows access 
in WL to the LPT1 port. Normal (SPP) ungrays the parallel ports in 
Setup---but the CW stutters and is unusable. EPP allows full access and 
smooth CW. Problem solved.

I did not expect to obtain an education in parallel ports to restore 
keying functionality in WL, but there it is. More info is at

 http://www.bb-elec.com/tech_articles/parallel_port_explained.asp

Thanks to K4SB, K6LL and others who offered help.

Garry, NI6T
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