Bob, I think PBWorks is currently configured so you have to be logged in to the system to be able to see the folders, etc. I was looking at David's GAL programmer earlier and couldn't see the folders until I logged in. I think there is another thread that has an administrative setting that has to be changed to allow public viewing.
Regards, Brian. On Wednesday, April 29, 2015 at 9:17:48 PM UTC-4, Bob Bell wrote: > > 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] <javascript:> [mailto: > [email protected] <javascript:>] *On Behalf Of *Todd Goodman > *Sent:* Wednesday, April 29, 2015 8:14 AM > *To:* [email protected] <javascript:> > *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] > <javascript:>> 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] <javascript:> > To: [email protected] <javascript:> > > 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] > <javascript:>> 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] <javascript:> > To: [email protected] <javascript:> > 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] <javascript:> > To: [email protected] <javascript:> > > 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] > <javascript:>> 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] <javascript:>. > 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] <javascript:>. > 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] <javascript:>. > 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] <javascript:>. > 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] <javascript:>. > 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] <javascript:>. > 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] <javascript:>. > 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. 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