• To: N8VEM «n8…@googlegroups.com»
• Subject: Re: AT/Everex versus DK/Intel witing for 2×5 serial headers on SBC boards.
• From: Sergey «skis…@gmail.com»
• Date: Wed, 9 Nov 2011 09:43:27 -0800 (PST)
• In-reply-to: <32e08574-801c-4958-900e-9f2aa9d7ca10@s9g2000yqi.googlegroups.com>
• References: <32e08574-801c-4958-900e-9f2aa9d7ca10@s9g2000yqi.googlegroups.com>
• User-agent: G2/1.0

Hmm, actually N8VEM SBCs (Z80 V1, Z80 V2, SBC-188) use following pins
on serial port header:
2 - DSR
3 - RX
4 - RTS (SBC V2 only, NC on others)
5 - TX
6 - CTS (SBC V2 only, NC on others)
7 - DTR
9 - GND

Which matches DTK/Intel pinout. And I am using a flat cable I made
using IDC connectors without any problems.

Thanks,
Sergey

On Nov 8, 5:07 pm, "G. Beat" <gregor...@gmail.com> wrote:
> Andrew –
>
> After reading the N8VEM Single Board Computer (SBC) instruction manual
> and other documentation,
> I noticed the wiring method selected for the IDC10 2.54 mm pitch pin
> header on the SBC
> that is used for wiring a DE9 RS-232 COM connector (port).
>
> Did you know that there are TWO industry conventions for this 2x5
> header (RS-232) serial port wiring??http://ss4200.pbworks.com/w/page/5122741/Console%20Access%20via%20RS232
>
> The N8VEM SBC adopted the AT/Everex convention for that serial header.http://www.logicsupply.com/products/db9_idc10
>
> The DTK/Intel convention is the other approach.
> This convention is used by Intel for its motherbaord headers and was
> used by Steve Ciarcia and Micromint
> for their computer boards in late 1980s/early 1990s.
> I prefer this approach -- because NO soldering is required.http://www.logicsupply.com/products/db9_idc10dtk
>
> You create the cable with two 3M IDC connectors (2x5 female header;
> male DE-9)
> Then you properly orient you ribbon cable (10 wire wide) using the red
> tracer for Pin 1 .
>
> Intel motherboard usage (D845, SS2400)http://www.intel.com/support/motherboards/desktop/d845pt/sb/cs-013224...
>
> The current N8VEM ECB document should note this difference (or mark
> convention)
> for next revisions / board runs.  The Intel ss4200 wiki graphics could
> be used for clarity.
>
> Greg Beat
> Chicago

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    • From: “G. Beat” <gregor…@gmail.com>

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