Hi, Please put me down for 2 new mother boards. Rick [email protected]
Fabio Battaglia <[email protected]> wrote: >I'd get two of these, if a run is made! >On May 4, 2015 2:07 PM, "Todd Goodman" <[email protected]> wrote: > >> Hi All, >> >> Josh, that's great! I'll wait a few days to get back any more comments >> people might have and then place the order. 10 boards? That should help >> prices then! >> >> As for thickness, I'm open to suggestions. The last boards were ordered >> with a 0.126 inch finished board thickness (whatever the actual delivered >> thickness.) Default board thickness is 0.063 inch. Thicker boards can be: >> 0.079, 0.098, and 0.126. Everyone please give opinions on what thickness >> is best. >> >> John (and everyone else who requested boards) I will order enough for >> everyone who has made requests and more to keep on hand. >> >> Thanks! >> >> Todd >> >> On Sun, May 3, 2015 at 11:22 PM, John Monahan <[email protected]> >> wrote: >> >>> Sorry Todd, same request >>> >>> John >>> >>> >>> >>> >>> >>> *From:* [email protected] [mailto:[email protected]] *On >>> Behalf Of *Crusty OMO >>> *Sent:* Sunday, May 3, 2015 8:00 PM >>> *To:* [email protected] >>> *Subject:* RE: [N8VEM-S100:6928] Re: Reorder of S-100 8-slot Backplane >>> PCB >>> >>> >>> >>> Hi John, >>> >>> Thanks, I believe Todd is arranging to do the run... I just polished up >>> the board a bit. >>> >>> Cheers, >>> Josh >>> >>> ------------------------------ >>> >>> From: [email protected] >>> To: [email protected] >>> Subject: RE: [N8VEM-S100:6922] Re: Reorder of S-100 8-slot Backplane PCB >>> Date: Sun, 3 May 2015 10:29:28 -0700 >>> >>> Hi Josh, great looking S100 V4 motherboard! I’m traveling a lot this >>> month (overseas) so in case I miss it please put me on the list for one >>> board. >>> >>> I have added an update to the S100 computers “Boards For Sale >>> <http://s100computers.com/Cards%20For%20Sale.htm>” section as well and >>> will try and do a ‘proper’ write-up on this new motherboard when it arrives. >>> >>> >>> >>> John >>> >>> >>> >>> *From:* [email protected] [mailto:[email protected]] *On >>> Behalf Of *Crusty OMO >>> *Sent:* Sunday, May 3, 2015 8:36 AM >>> *To:* [email protected] >>> *Subject:* RE: [N8VEM-S100:6920] Re: Reorder of S-100 8-slot Backplane >>> PCB >>> >>> >>> >>> The bus is routed to a 34 pin connector, so I thought it would be nice to >>> repurpose this connector as the termination resistors, which is why I made >>> it 38 pins. Using 9 pin R-Nets, from both sides will reach 32 of the 34 >>> pins. The missing 2 pins are in the center and are wired as either +8V or >>> GND, so they don't need termination. >>> >>> The +16 and -16 are wired to the 34 pin connector and don't need >>> termination either, so be advised that either those traces be cut or the >>> leads of that pin of the RNet be clipped. I'm thinking of just not routing >>> the +16/-16 since these power lines can easily be fed to the 2nd back plane >>> if desired... your thoughts? >>> >>> ------------------------------ >>> >>> From: [email protected] >>> To: [email protected] >>> Subject: RE: [N8VEM-S100:6915] Re: Reorder of S-100 8-slot Backplane PCB >>> Date: Sat, 2 May 2015 22:06:01 -0400 >>> >>> I’m curious about the termination R-Nets. >>> >>> I thought they would all be the same, but there are only 38 pins on each >>> of the connectors where the R-Nets will go, so four 10-position (9 >>> resistor) R-Nets won’t fit. They will need a total of 40 pins. And they >>> don’t make 9-position R-Nets from what I can see. >>> >>> >>> >>> Bob Bell >>> >>> >>> >>> >>> >>> *From:* [email protected] [mailto:[email protected]] *On >>> Behalf Of *Crusty OMO >>> *Sent:* Saturday, May 02, 2015 9:50 PM >>> *To:* [email protected] >>> *Subject:* RE: [N8VEM-S100:6914] Re: Reorder of S-100 8-slot Backplane >>> PCB >>> >>> >>> >>> PDF's attached for V4 >>> ------------------------------ >>> >>> From: [email protected] >>> To: [email protected] >>> Subject: RE: [N8VEM-S100:6907] Re: Reorder of S-100 8-slot Backplane PCB >>> Date: Fri, 1 May 2015 21:26:16 -0400 >>> >>> Ah, so there is both an easier way and a smarter way to do this. >>> >>> Thanks for the advice. >>> >>> It works fine now. >>> >>> >>> >>> Bob Bell >>> >>> >>> >>> >>> >>> *From:* [email protected] [mailto:[email protected] >>> <[email protected]>] *On Behalf Of *Crusty OMO >>> *Sent:* Friday, May 01, 2015 8:08 PM >>> *To:* [email protected] >>> *Subject:* RE: [N8VEM-S100:6905] Re: Reorder of S-100 8-slot Backplane >>> PCB >>> >>> >>> >>> Bob, >>> >>> It's the dreaded intermittent car noise. Take it into the mechanic and >>> it stops making that noise.... This is why I put a life sized mechanic in >>> the trunk... it works like a scare crow. >>> >>> So, after you open KiCad, and before you click PCBNew, click File Open >>> from the menu to open the whole project (schematic and PCB files). Then >>> PCBNew will find the .brd file from that project folder. >>> >>> Cheers, >>> Josh >>> ------------------------------ >>> >>> From: [email protected] >>> To: [email protected] >>> Subject: RE: [N8VEM-S100:6903] Re: Reorder of S-100 8-slot Backplane PCB >>> Date: Fri, 1 May 2015 14:21:35 -0400 >>> >>> Thanks for your help, Josh. >>> >>> Here’s what I have tried: >>> >>> Running KiCAD 2013-07-07 BZR 4022 – stable. >>> >>> From here, I click on PCBNew and it starts. >>> >>> (It complains about some unknown project – makes no sense – I just click >>> okay.) >>> >>> I click File Open, and I get a dialog saying the current board has been >>> modified, and if I want to discard the changes. >>> >>> I answer Yes. >>> >>> Then I get an Open Board File dialog. In here, I navigate to where I >>> have your files stored. >>> >>> When I get there, it says No items match your search. I know for sure >>> your files are there – I can see them in Windows Explorer. >>> >>> >>> >>> Wait…as I am going through this to reproduce the problem, I now see where >>> I can change the file type. And one of the types is KiCAD .brd. >>> >>> I selected that and now I can open your KiCAD file. >>> >>> I swear that was not there yesterday! >>> >>> >>> >>> No more problems! >>> >>> >>> >>> Bob Bell >>> >>> >>> >>> >>> >>> >>> >>> *From:* [email protected] [mailto:[email protected] >>> <[email protected]>] *On Behalf Of *Crusty OMO >>> *Sent:* Friday, May 01, 2015 12:19 PM >>> *To:* [email protected] >>> *Subject:* RE: [N8VEM-S100:6902] Re: Reorder of S-100 8-slot Backplane >>> PCB >>> >>> >>> >>> Hmm, I'm not sure why it won't open. Did you open the >>> project from KiCad first? >>> Perhaps we can arrange a phone call and I can walk you through how I did >>> it here? >>> >>> -Josh >>> >>> >>> ------------------------------ >>> >>> From: [email protected] >>> To: [email protected] >>> Subject: RE: [N8VEM-S100:6894] Re: Reorder of S-100 8-slot Backplane PCB >>> Date: Thu, 30 Apr 2015 21:46:24 -0400 >>> >>> Okay. I got my account straightened out on PBworks and I can get to the >>> files. >>> But now the next hurdle: I cannot open any of them in KiCAD PCBNew. It >>> wants a file with a kicad_pcb extension, of which there are none. >>> >>> I have done minimal work in PCBNew, so I’m not sure what to expect. >>> >>> Please advise. >>> >>> >>> >>> Bob Bell >>> >>> >>> >>> >>> >>> *From:* [email protected] [mailto:[email protected] >>> <[email protected]>] *On Behalf Of *Crusty OMO >>> *Sent:* Wednesday, April 29, 2015 10:50 PM >>> *To:* [email protected] >>> *Subject:* RE: [N8VEM-S100:6877] Re: Reorder of S-100 8-slot Backplane >>> PCB >>> >>> >>> >>> >>> I click the link and it works for me. >>> >>> Josh. >>> ------------------------------ >>> >>> From: [email protected] >>> To: [email protected] >>> Subject: RE: [N8VEM-S100:6876] Re: Reorder of S-100 8-slot Backplane PCB >>> Date: Wed, 29 Apr 2015 21:13:09 -0400 >>> >>> I was going to review the work, but the link takes me to a blank page >>> that says: >>> ViewFolder failed to load: Folder 'S-100 backplane' does not exist. >>> >>> >>> >>> Has anyone else had the same issue? >>> >>> >>> >>> Bob Bell >>> >>> >>> >>> >>> >>> *From:* [email protected] [mailto:[email protected] >>> <[email protected]>] *On Behalf Of *Todd Goodman >>> *Sent:* Wednesday, April 29, 2015 8:14 AM >>> *To:* [email protected] >>> *Subject:* Re: [N8VEM-S100:6864] Re: Reorder of S-100 8-slot Backplane >>> PCB >>> >>> >>> >>> Thanks Josh! >>> >>> >>> >>> If others (Don, Bob, and anyone else) who had changes they wanted to make >>> can take a look I'd appreciate it. >>> >>> >>> >>> Thanks! >>> >>> >>> >>> Todd >>> >>> >>> >>> On Tue, Apr 28, 2015 at 10:05 PM, Crusty OMO <[email protected]> >>> wrote: >>> >>> Hi Todd, >>> >>> Ok, I took a good look over the board, found 1 minor mistake. I added >>> some text to the silk screen layer to make it friendly. >>> >>> I'm pretty much done, I can't see anything more to add or fix. I counted >>> the S-100 pins a few times, came up with 98 on one count, but that's ok, we >>> can just file off 1 of the pins and call it S-98. >>> >>> Anyway, the new V4 files are on line at: >>> >>> http://n8vem-sbc.pbworks.com/w/browse/#view=ViewFolder¶m=S-100%20backplane >>> Look for file S100 backplane V4.zip >>> >>> If anyone wants to review them, please do. Otherwise... I think I'm >>> done. >>> >>> Cheers, >>> Josh Bensadon >>> ------------------------------ >>> >>> Date: Mon, 27 Apr 2015 08:38:42 -0400 >>> Subject: Re: [N8VEM-S100:6831] Re: Reorder of S-100 8-slot Backplane PCB >>> >>> >>> From: [email protected] >>> To: [email protected] >>> >>> Hi Josh, >>> >>> >>> >>> Looks great to me! (I didn't look at the beta version yet though.) >>> >>> >>> >>> I won't order until you give the "all clear" and I'm not in a hurry. >>> >>> >>> >>> Thanks! >>> >>> >>> >>> Todd >>> >>> >>> >>> On Mon, Apr 27, 2015 at 12:19 AM, Crusty OMO <[email protected]> >>> wrote: >>> >>> Hi Todd, >>> >>> Ok, I've finished rewiring the S-100 9-slot backplane. Please do not >>> build it yet... I want to look it over a few times, since it's all hand >>> routed, there might be problems. I also want to pretty up the Silk >>> Screen. >>> >>> I've uploaded this beta version for anyone to help look for problems. >>> It's at: >>> >>> http://n8vem-sbc.pbworks.com/w/browse/#view=ViewFolder¶m=S-100%20backplane >>> >>> The file is called "S-100 Backplane v4-beta.zip" >>> >>> Features of the board: >>> -Includes a custom spaced slot #1 for Front Panel on the IMSAI computer >>> (spacing = 1.04" instead of .75") >>> -Holes for mounting in either ALTAIR or IMSAI chassis >>> -There is a "no component" or Trace zone where the board would rest on >>> the rails of an ALTAIR computer. >>> -Bus traces are all on the bottom, top layer is primarily a fill zone to >>> help shield bus noise. >>> -2 connectors for power are available, the original 0.2" spaced and a new >>> 0.156" spaced for molex connectors. >>> -9 Slots in total. >>> -Board can be extended to another back plane by use of 3 x 34 pin ribbon >>> cables >>> -The last board can be terminated. >>> -Reset switch moved to the front >>> -Grounding jumpers for 3 bus lines (as per previous versions) >>> >>> Note, Termination uses the same holes that the ribbon cable would, so >>> it's either, extend the bus, or terminate the bus, but not both. >>> >>> >>> >>> >>> >>> >>> >>> Losses on the board.... >>> -No fuses, I just couldn't squeeze them in... I hope this is ok.... >>> >>> Regards, >>> Josh Bensadon >>> >>> >>> ------------------------------ >>> >>> From: [email protected] >>> To: [email protected] >>> Subject: RE: [N8VEM-S100:6827] Re: Reorder of S-100 8-slot Backplane PCB >>> Date: Sun, 26 Apr 2015 15:22:38 -0400 >>> >>> >>> >>> Hi Todd, >>> >>> I'm well underway on rewiring the back plane. Since it's not a >>> complicated circuit, I am foregoing the schematic and just doing the traces >>> in manual mode. The first slot is spaced 1" from the 2nd slot. Since I >>> want to be able to cascade them, and since the IMSAI board is wider, I >>> moved the Termination to the side and was able to add a 9th slot. The back >>> 8 slots are all 3/4" spaced. When you cascade the boards, the last slot >>> will be 2.25" from the 2nd slot on the next board, ie, skip 2 standard >>> slots and resume 3/4" spacing. >>> >>> The mounting holes for IMSAI are there, and even when cascaded, they >>> *should* all line up... I hope. >>> >>> The mounting holes for ALTAIR are just the holes for the S100 connectors, >>> but I was careful to not place components or traces along the width of the >>> two rails. The first slot spaced 1" can be mounted into the existing >>> holes, but new holes will need to be drilled and tapped for the last slot. >>> I haven't removed my ALTAIR Back Plane to look (don't want to upset all the >>> wires, I heard on another post that these wires break easily). But it >>> appears they only drilled and tapped 4 holes on the rails anyway. >>> >>> I hope to get this board done by tonight... but I recommend you give me >>> another week to look it over for errors. >>> >>> Cheers, >>> Josh >>> ------------------------------ >>> >>> Date: Sat, 25 Apr 2015 16:03:29 -0400 >>> Subject: Re: [N8VEM-S100:6825] Re: Reorder of S-100 8-slot Backplane PCB >>> From: [email protected] >>> To: [email protected] >>> >>> Hi Josh, >>> >>> >>> >>> Personally I'd prefer your #2, 8.5" with IMSAI and Altair holes. >>> >>> >>> >>> It looks like fabricating the ALTAIR card guide mounts wouldn't be too >>> bad? >>> >>> >>> >>> I'm probably not understanding something but couldn't we fix issue with >>> cascading the boards when the first slot is shifted buy ensuring there's >>> enough bare (or with only lower profile parts than the connectors) after >>> the last connector before the edge of the board? Or does that screw up >>> card guides or something on some standard chassis? >>> >>> >>> >>> Todd >>> >>> >>> >>> On Sat, Apr 25, 2015 at 1:37 PM, Crusty OMO <[email protected]> >>> wrote: >>> >>> Guys, >>> >>> Here's our first hurdle.... the ALTAIR back plane is 11" wide. It is >>> like this because the card slot guides are screwed in from the bottom of >>> the board. The IMSAI back plane is only 8.5" wide. >>> The 8 slot board v2 is 7.25" wide. >>> >>> It's not a problem to expand to 8.5", but 11" makes it interfere with the >>> IMSAI chassis by about .25" >>> >>> Option 1. Make it 11", ready for the ALTAIR... IMSAI use will require >>> cutting the board. >>> Option 2. Make it 8.5", with IMSAI and ALTAIR holes, ALTAIR use will >>> just have to sacrifice the card slot guides. >>> Option 3. Make it 10.75" with a 8.5" irregular width for the first slot, >>> this will allow it to fit both systems, but only allows a single screw to >>> hold the 5/8" wide card slot guide (otherwise needs 2 screws). >>> >>> >>> In Option 2, ALTAIR users can always create their own cross beams using >>> 1/2" aluminum angle to support the card slot guides. Here's a picture of >>> the first slot as pictured from the back. >>> Look closely, you see 2 holes for card slot guides. Now look at the rail >>> that supports this board, it starts near the S-100 connector, this board is >>> supported by the holes of the S-100 connector to two of these rails. New >>> rails can easily be added, see the multiple holes available on the end of >>> the chassis? >>> >>> >>> >>> >>> >>> >>> >>> The NEXT hurdle involves the fact that the first slot on the IMSAI is >>> spaced just over 1" to slot 2. This is because the first slot is meant to >>> reach the front panel. All the other slots are the regular 0.75" >>> spacing... This shouldn't be too much trouble, but it becomes trouble when >>> wanting to cascade these boards to make larger back planes. There will >>> need to be a sacrifice of one or two slots to maintain correct spacing. >>> >>> Thoughts? >>> >>> Regards, >>> Josh >>> >>> >>> -- >>> You received this message because you are subscribed to the Google Groups >>> "N8VEM-S100" group. >>> To unsubscribe from this group and stop receiving emails from it, send an >>> email to [email protected]. >>> For more options, visit https://groups.google.com/d/optout. >>> >>> >>> >>> >>> -- >>> You received this message because you are subscribed to the Google Groups >>> "N8VEM-S100" group. >>> To unsubscribe from this group and stop receiving emails from it, send an >>> email to [email protected]. >>> For more options, visit https://groups.google.com/d/optout. >>> >>> >>> -- >>> You received this message because you are subscribed to the Google Groups >>> "N8VEM-S100" group. >>> To unsubscribe from this group and stop receiving emails from it, send an >>> email to [email protected]. >>> For more options, visit 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