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Slot 8 Support Daughterboard for XT-IDE

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    #16
    Very cool, as always, Glitch! I'll definitely buy a kit, when you complete this.

    - Alex

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      #17
      Originally posted by glitch View Post
      ... Rev 1 boards will as well, if you've got one that has all of the edge fingers populated -- the ones I've got don't...
      My Rev 1 Boards don't either, IIRC it was only the very early prototype Rev 1 boards that had all the fingers and the unused fingers got removed a bit later on in the stage, before the main production run.

      Nice looking mod

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        #18
        Didn't have time to dig out the XT this weekend, should be able to get it tested next weekend. Glad to see people are interested in it
        Check out The Glitch Works | My Retro Projects | Vintage Computer Services | Glitch Works Tindie Store -- Vintage Computer Kits and More

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          #19
          Finally had time to test, it works fine with the rev 3 boards! I'll put together a rev 2 test tonight or tomorrow evening and test with the serial port.
          Check out The Glitch Works | My Retro Projects | Vintage Computer Services | Glitch Works Tindie Store -- Vintage Computer Kits and More

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            #20
            Works with the Rev 2 board, and the wiring is even cleaner than the Rev 3 board! It's like I meant it to work like that I'll post pictures and a full write-up later.

            Since I'm not sure how much interest there's going to be in these boards, if you're interested in one, would you be OK with buying a prototype run board? They work fine, and are high-quality OSH Park Made in the USA items.
            Check out The Glitch Works | My Retro Projects | Vintage Computer Services | Glitch Works Tindie Store -- Vintage Computer Kits and More

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              #21
              I'd be more than happy with a prototype board. Put me down for one and let me know how to pay for it.

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                #22
                Pics of the mod installed on a Rev 2 card:



                The wiring is super-simple:



                The Rev 2 mod, as mentioned, works with all functionality including the serial port. I'll be doing a writeup on the install process and getting the files up to GitHub soonish. As you can see, this board got fitted with the Slot 8 Support board using silkscreen. I think I like the solder mask relief version better!
                Check out The Glitch Works | My Retro Projects | Vintage Computer Services | Glitch Works Tindie Store -- Vintage Computer Kits and More

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                  #23
                  Looks great! Thanks for all your hard work!

                  Heather

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                    #24
                    I've got one prototype board left -- if more than one person wants one, I'll put a panel together sooner rather than later, but I've got some other projects on the board if there's no immediate demand for more of these.

                    Pricing as follows:

                    Bare board $2
                    Parts kit $3
                    Board + parts kit $5
                    Assembled unit $10

                    Ships in a bubble mailer, so even overseas shipping should be pretty cheap. I'll be working on a writeup and getting the design files on GitHub so if you'd like to just run your own you will be able to do that soon. As mentioned it's around $5 to get the boards made from OSH Park.

                    The two people who ordered prototype boards will be getting theirs shipped out today, if you happen to get your boards before my writeup is done, the only thing not covered by the pictures is that it helps to remove the solder from the back of the board on the EEPROM socket pins that the mod board connects to. Not required but it will help the mod board sit flat against the XT-IDE board. You can use solder wick or a solder sucker, you don't need to get the solder out of the XT-IDE board's holes, just get it flat.

                    The prototype boards do not have the mounting holes scored, so if you want half-pads you'll need to cut the board with sharp dikes or use a bastard file on them. Remember not to breathe dust from filing, these are FR4 boards and fiberglass dust is bad for you! A standard NIOSH paper face mask is fine if you're filing on them inside, or just go slow and use only down strokes on the file. Half-pads are not necessary for installation, but it makes it easier.
                    Last edited by glitch; November 7, 2016, 07:30 AM.
                    Check out The Glitch Works | My Retro Projects | Vintage Computer Services | Glitch Works Tindie Store -- Vintage Computer Kits and More

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                      #25
                      As requested by Skydivingirl: if you're not using K3 as a power header, you can modify it to be a Slot 8 enable/disable jumper. I don't know what, if anything, uses K3. Pics:



                      This is the original non-disableable modification



                      This is jumper/header K3. It can provide +5V on a 3-pin header. Pin 1 (square pad with the box around it) is connected to +5V and is the end of the line for the trace. We're going to cut the trace between K3, pin 1 and P9, pin 1



                      I like to cut traces so that I can remove the middle of the trace -- that was you really *know* it's cut!



                      Cut off K3 pin 3 (nearest to the IDE header) so that we don't accidentally jump /CARDSEL to ground, that would cause bus conflicts.



                      Use K3 pins 1 and 2 as the jumper, just route TP1 to K3 pin 1, and K3 pin 2 down to /CARDSEL on the edge connector. Now, placing a jumper on the two remaining pins of K3 will enable Slot 8 Support!
                      Check out The Glitch Works | My Retro Projects | Vintage Computer Services | Glitch Works Tindie Store -- Vintage Computer Kits and More

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                        #26
                        Thanks so much for your efforts on this! I'll be sure to post a picture of my card once I do the mod.

                        Heather

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                          #27
                          Finally had time to do writeups:

                          Building + rev 3 install: http://www.glitchwrks.com/2017/02/03/slot-8-support
                          Rev 2 install + K3 hack: http://www.glitchwrks.com/2017/02/05/slot-8-xt-ide-rev2

                          I still have one or two of the prototype boards left, if anyone wants a kit or assembled mod board. I'll be ordering more in the near future, so they're available for the VCF East XT-IDE workshop.

                          Files haven't been uploaded to GitHub just yet, I need to go through them, should be up within an hour or so.
                          Check out The Glitch Works | My Retro Projects | Vintage Computer Services | Glitch Works Tindie Store -- Vintage Computer Kits and More

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                            #28
                            I'm calling this one finished! Here's the final design:



                            I ran it at OSH Park, castellated holes came out fine, and the solder mask relief for R1 is now fixed. There's a blank-out bottom solder mask layer included in the Gerbers, so that you can run it at board houses that do everything double-sided -- without it, you end up with the back totally covered in solder mask, which gets in the through holes.

                            I've got three of these new boards, if anyone needs them. I'll probably panelize 20 or 30 and run them, seems like that is probably a pretty good supply, considering the demand is low.

                            EDIT: Here's the GitHub repo with all of the relevant info: KiCad project, Gerbers (including a ready-to-go ZIP file), BOM, et c.:

                            https://github.com/glitchwrks/xt_ide_slot_8_support
                            Last edited by glitch; February 21, 2017, 08:52 AM.
                            Check out The Glitch Works | My Retro Projects | Vintage Computer Services | Glitch Works Tindie Store -- Vintage Computer Kits and More

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                              #29
                              I'll pick up one more from you.

                              Thanks!

                              Heather

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