/* Imported from Wayback Machine Original URL : https://www.retrobrewcomputers.org/n8vem-gg-archive/html-2011/Nov/msg00172.html Snapshot date: 2022-07-19 Generator : wayback-archiver */ ---- [[[msg00029.html|Date Prev]]][[[msg00199.html|Date Next]]][[[msg00171.html|Thread Prev]]][[[msg00174.html|Thread Next]]][[[maillist.html#00172|Date Index]]][[[threads.html#00172|Thread Index]]] ====== Re: AT/Everex versus DK/Intel witing for 2x5 serial headers on SBC boards. ====== ---- * //To//: N8VEM <> * //Subject//: Re: AT/Everex versus DK/Intel witing for 2x5 serial headers on SBC boards. * //From//: Sergey <> * //Date//: Wed, 9 Nov 2011 09:43:27 -0800 (PST) * //In-reply-to//: <[[msg00171.html|32e08574-801c-4958-900e-9f2aa9d7ca10@s9g2000yqi.googlegroups.com]]> * //References//: <[[msg00171.html|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" 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 ---- * **Follow-Ups**: * **[[msg00174.html|Re: AT/Everex versus DK/Intel witing for 2x5 serial headers on SBC boards.]]** * //From:// "G. Beat" * **[[msg00175.html|Re: AT/Everex versus DK/Intel witing for 2x5 serial headers on SBC boards.]]** * //From:// "G. Beat" * **References**: * **[[msg00171.html|AT/Everex versus DK/Intel witing for 2x5 serial headers on SBC boards.]]** * //From:// "G. Beat" * Prev by Date: **[[msg00029.html|Re: [N8VEM: 12152] Re: Please see ECB ModPrn on n8vem-sbc]]** * Next by Date: **[[msg00199.html|Re: [N8VEM: 12141] Re: Please see ECB RAM-Floppy on n8vem-sbc]]** * Previous by thread: **[[msg00171.html|AT/Everex versus DK/Intel witing for 2x5 serial headers on SBC boards.]]** * Next by thread: **[[msg00174.html|Re: AT/Everex versus DK/Intel witing for 2x5 serial headers on SBC boards.]]** * Index(es): * [[maillist.html#00172|**Date**]] * [[threads.html#00172|**Thread**]]