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Dropcheck

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Everything posted by Dropcheck

  1. Hey, yea that's clearer for JP1 and JP2. Thanks. Still not sure what JP3 in the upper right corner of v11 of the keyboard does.
  2. Hello Screamingattheradio, I am attempting to assemble a v11 Decent XE keyboard and I guess I'm particularly dense today, but I am not understanding the JP1 and JP2 jumper configs. I am using the modern keycaps, but would like to keep the original keyboard layout. Also I would like to use the backlight with the pot to adjust brightness. How do I configure JP3? Excited about getting this keyboard done to try it out. 🙂
  3. If you have the specific version of CPU. Might be implied, but some people like me would make an assumption because they hadn't had their morning coffee(uhmmm Dr Pepper) yet. 😃
  4. FYI: XF551/SF551/iSF551 status I should have what I hope are the final versions of these boards in Tuesday from the board manufacture. I know it's been awhile longer than I thought, but any time you make changes/modernization of parts on a stable design it some times becomes a comedy of errors and missteps and not quite theres. I discovered after buying a SF314 disk drive from Best Electronics, that there are even more variations of the internal space available for my modified SF551 board. The drive seemed longer and the control board inside even smaller. So.... trying to make the redesign as compatible as possible another major revision was needed. Unfortunately it meant going nearly all SMT. There are times when I curse Atari and this was one of them. 🤕 While waiting for the redesigned boards to come in I decided to process two more Atari projects for release to PD. My dalliance with the Supra Microprinter Adapter was turned into an internal pcb that can be installed in a 800XL/130XE. Not sure what the demand is but it was fun to do. Also released is the 800XL/130XE Cartridge Guide Extender set. This was in response to an expressed desire to put the 800XL into a different case and the need to have an external access to the cartridge slot in that case. I have a version specifically designed for the 1088XLD, but that is currently under contract with The Brewing Academy. You might be able to get this version to fit, but it will take some definite creativity.
  5. Best Electronics is where I found mine. CB102550 ON/OFF DTDP right angle rocker switch
  6. You'll need to verify that your Willem programmer can program that specific chip even with an adapter. Not all can. There are so many 'versions' of Willem programmers that finding the correct adapter for the version you have might be hard. You might be better off seeing if someone here can program it for you.
  7. The SST-39SF040 I think came in the limited run Super SpartaDOS X complete pcb and cartridge case with the reset button. Is that the one you have? If not then the PLCC chip is different. It's a AM29F040B.
  8. Looks like Corei64.com is back up. Got an email from him. He is waiting on the last part or two before starting a run for production.
  9. Direct reprogramming of the 32pin PLCC chip with a compatible programmer. Usually the easiest and the way I do it. Here's the file: SDX449_reimaged.rom
  10. I used to produce a reimaged SpartaDOS X cart, but now corei64.com should be offering it. I just tried to check their site and there is a firewall blocking it. Could someone else try and see if they are getting blocked too.
  11. So far (cross my fingers and toes) I've not had any problems with Brad. He does limit the number sold of certain items per order and I can understand that. Two reasons that come to mine is yes the possibility that you will resell them and also that someone else has a chance to get their share. Also this last time I was wanting to buy parts of, but not the whole drive since I already had the drive I/O board. He was real reluctant about that, preferring to sell me a complete drive. His reasoning to me made sense, it would not be economical for me, but was probably not the real reason, it was probably easier for him. He probably doesn't have many loose individual parts left. Most would have to be parted out from a complete unit. More time and effort for him, leaving excess partial inventory that is harder to sell. I've never gotten a bad part from him, that he indicated had been tested. He packs shipping very well and quickly ships. Lately I have been calling him to finalize an order as he seems to do better than with email. I do wish he still did paypal, but I understand that decision not too. I have had enough experience with trying to sell to the public and I can put myself in his place. He gets orders from all over the world, from all different kinds of personalities and some language and mannerisms are not easily translated. That anyone is doing what he is doing for any price is a wonder. I don't believe it's just for the money or just a job for him. And I seriously doubt he has any employees to help him. Maybe family every now and then. So expecting him to be Walmart or Mouser or Digikey is not realistic. I don't want to bash him. After so long I don't think anyone of us would be doing any better. And some of us would probably be doing worse. We are all human. The reality is that he still is the most dependable( or only) source for original equipment for our hobby, and we play by his rules. Else we suck it up and go without or look elsewhere.
  12. Does anyone know of a source for the XF551 style power switch with the retaining bracket. I looked in Best Electronics's Big Book and didn't find it listed. I hate to keep desoldering the one or two I have left just for testing purposes.
  13. Duh..... I remember this. I hadn't had my coffee(Dr Pepper) this morning. That's my story and I'm sticking to it. 🙃
  14. If they released the .stl file you can have them printed by a third party.
  15. Let me know how it goes. I applaud you on your fortitude for trying to do DIY on this I/O System Mod. It's not easy.
  16. That was in part the inspiration. I didn't realize 3 1/2" drives came that slim. His XF551 board looks clean. Not sure what OSC value he's using or OS. Do you remember? One thing I am trying to do is add on track display, ability to switch OS and a little more versatility in the OSC circuitry.
  17. True to form..... as soon as I had sent the gerbers out for manufacturing, I started tinkering again. Absolutely a bad habit......🙂 Anyway.... I now have at current count three versions of the original XF551, the original drop in replacement board for the XF551 drive case, a SF551 version that should fit the SF314 case with the square eject button not the slanted one and support either a +5V and +12V and +5V only Atari OEM 3.5" drive, and finally an internal iSF551 board designed to support the slim line NEC FD3238H/T style 3.5" floppy drive that should fit with a bit of ingenuity into a 130XE case. Furthermore each board has been updated for currently available parts with the exception of three period based chips, Intel 8040/8050 CPU, WD1772PH and 27C64 eprom chips. Additional circuitry to add a substitute for the hard to find OSC 8.3333MHz has been added for all three boards. The SF551 board has substitute circuitry for the hard to find originally designed power filter. And the original XF551 drop in board and the iSF551 boards have additional circuitry for double digit track display and connections for front facing Drive ID and OS selection and Reset controls. The actual holding boards for the track display and controls will also be created and tested before release. The test boards came in today. So over the next few weeks I'll be assembling each version one by one and testing that everything works. Naturally something won't, but I doubt it will be a major issue, a missing gnd in most cases. All of the circuitry worked in other versions. Just a case of getting everything working in a new configuration. As each version tests out I'll post gerbers to my website. Since these boards are somewhat complicated, I think I will release the schematics at the same time. All fixes will be incorporated.
  18. Didn't know there was a clear case for the 130XE. Interesting.
  19. My aborted attempt to put a populated 1088XEL board into a standard mITX pc case with a XF551 drive. I planned to put a XF551 circuit board with front facing controls and track display in the 3 1/2" drive bay underneath the drive mech. It worked, sort of. It was a proof of concept that I just didn't quite finish. It's on the list of things to finish up sometime this year. 🙂
  20. New versions for the XF551 and SF551 pcbs went out to JLCPCB this evening. Should have them in hand, hopefully in about two weeks. Mytek, I'm going to try the choke for the SF551 you posted Here . It looks like it could work. I modified the pcb for that part. If not then I can always go back to the original design. I did make some changes that Jon suggested.
  21. That's the next section to go up on my site. Both the XF551 and SF551 versions. So many parts I used originally have gone obsolete over the last few years. I'm trying to nail down the updated parts and new board layout that will accommodate the newer parts. I want to make sure it works first, so it might be a couple of months or so. I didn't know at the time that there were three different versions of the SF314 made. The only one I had to follow appears to have been one of the early versions that still used both +5V and +12V power for the drive mech. I feel like I should apologize to Jon. He had quite a tussle with that conversion. It should have been easier.
  22. It was actually a proscribed first action in the troubleshooting steps for a couple old, old electronics boxs I worked on in the Navy back in early 90s. They had backplanes that cards would loosen up in and without even opening up the boxs you could fix the problem by turning them just so, raise them a inch or so in your hands then drop them on the countertop. The other common first troubleshooting tip was to tap the box. Same premise. I do the same thing with my house thermostat when the heater won't go on or the AC won't turn off when the set temp is reached or exceeded. Gotta love electronics......🙂
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