Jump to content


  • Content Count

  • Joined

  • Last visited

Posts posted by Caribeno

  1. Hi,

    I'm trying to disassemble an Atari Pong C-100, and the screws that connect the base to the unit (under the battery pack) are some weird, 3 wing reversed (in the screw, the depth at the center is less than in near the border). I tried using pliers, but the screw is too round and the pliers just slip.


    Has anyone had this problem around here? Any solutions?





  2. Hello!

    I'm finally the owner of a Falcon, and I'm very happy. The first impression is that the machine is working, so that's nice. But when I opened it, I found 2 upgrades that I cannot identify:


    First one, I think, it is a buffer patch. It has wires going to the floppy controller (pin 14) and to the motherboard.



    Second one, has wires connected to both EF68B50P ICs (pins 3, 4 and 5) and other places in the motherboard. It has some oscillators, so... It is some kind of overclocking? The strange thing is that there are other cables coming from the little board, but they are cut. And, of course, there is the fact the fan was removed to put this little board.


    Any clues?





  3. 6 hours ago, mdivancic said:

    Lone screw left over. Damn.


    She is less than stable. I may need to cut away more of the shield?

    Oh, that sucks... I hate when I have extra screws left. 🙂


    Mmmhhh... It could be the shield but my cut, although similar, it is even smaller than yours (it is basically only for the memory; the shield around it was left intact). Maybe it is touching something? What if you remove the shield?

  4. Hi!

    Sorry that I'm just replying; had too many things happening.


    The upgrades look great! Unfortunately, I don't have a second STE adapter for the UltraSatan. 😞


    Question: Did you have to cut the metal shield above the memory/TOS/keyboard card, so it could fit the 4 Mb expansion? I did have to do that...




    P.S.: The tray looks amazing!

  5. 2 hours ago, mdivancic said:

    I’m working on a 3D printed tray and faceplate for the US that will allow it to slide out for easy battery replacement. 

    Ah! That's neat; I was wondering about that and that's the reason I connected some cables to the original RTC battery.


    Can you share the plans of the tray and faceplate when you are done? 🙂

  6. 21 minutes ago, DarkLord said:

    Oh, don't know if they are still doing it or not but

    in my case they wanted my old board as a trade

    in. Reckon, they are getting in short supply and

    they are re-doing the old boards, upgrading them,

    'n stuff.


    They do it if you have a Stacy 2. For a Stacy 1, you have to buy the new board and keep the 1 MB one.

  7. On 6/17/2020 at 10:51 AM, mdivancic said:

    Any updates? Just picked up a STacy 1 myself and am thinking about up grades. The screen is in good shape. Case and keyboard in good shape. Hard drive gone to goo. Only want to open it once. Currently just considering a US internal. I which there was a video upgrade available like there is for the 8-bit series.


    Oh, RTC battery? Soldered to the MB?  Is it OK leaving it where it is and just using the US RTC?

    Sorry I'm late answering. But +1 to everything @DarkLord said. 🙂 


    I desoldered the internal battery, just in case, and put a couple of cables to the battery compartment (mine can be opened), just in case I want to connect a battery there in the future.


    Also, if you want, consider upgrading the Stacy to 4 MB. You can buy the upgrade from Best Electronics (that's what I did):



    (look for item CB102144 . FYI, on my Stacy, I had to cut a little bit of the internal metal shield to fit it)


    And last, but not least, take a look at my blog, where I show how to disassemble the Stacy:




    A couple of days ago I finally put it all back together, so I will be posting about that soon.



  8. 1 hour ago, drac030 said:

    I do not know if this could be the case, but one (and often being forgotten) source of problems with PBI devices may be a conflict of the IDs. Now Rapidus (even in the Classic mode) is a PBI device occupying ID #0. So any HDD or such should be relocated to higher IDs when the board is present.

    That was it!!! 🙂 I did not know that Rapidus was also a PBI device (seems obvious now). After changing PBI Device ID to 2 in the U1MB everything works.


    Thank you so much!



    • Like 1

  9. 7 hours ago, flashjazzcat said:

    SDX should have no impact whatsoever on functionality of the PBI HDD, since the HDD works independently of DOS in these circumstances. Is this behaviour also exhibited when Rapidus is removed from the machine? Honestly: I see so much crazy behaviour when Rapidus and U1MB are present in the same computer, until hardware instability is eliminated, I am disinclined to start troubleshooting the situation (since the reasons for the issues may be beyond anyone's control). Spontaneous disappearance of the hard disk is not exactly unprecedented behaviour on such setups.

    No: with the PBI HDD enabled, the partitions will auto-mount when the computer is powered on. If the APT partitions are greyed out, it means the PBI HDD is disabled (and the computer therefore has no access to the HDD other than via the SDX SIDE driver).

    Exactly as you said: as soon as I removed Rapidus, the SDX from U1MB loaded the PBI BIOS and all the partitions in the SIDE2 are ready available. Thank you so much!


    Now: Do you know where I can start to look at what's the problem with Rapidus?


    Take care, and thank you again.




    P.S.: I will watch your video about stability of those two after lunch.

    • Like 1

  10. 3 hours ago, Caribeno said:

    Have another question: you mentioned in your previous response that the ideal setting to use SIDE2 + U1MB is to enable the PBI BIOS. turn on the PBI HDD, put the side switch up and enable SDX in the U1MB. But after I created the partitions and formatted them, and verified they are working, if I boot the SDX from U1MB it does not recognize the CF card. If I load the SIDE.SYS driver, then I can see the partitions and use them. What am I missing?

    OK, I think I'm closer, but still confused: I guess I need to mount the APT partitions in the SIDE LOADER. If I go to the APT tab (the one with the rocket ship), I can see both partitions I created, but neither of them can be selected.

  11. 1 hour ago, flashjazzcat said:

    I'm told some newer CF cards dropped 8-bit PIO mode entirely. If this is true, they would indeed be rendered useless with SIDE2.

    Ah! Unfortunately, it is not that easy to know, beforehand which ones have the 8-bit PIO removed. 😞


    Have another question: you mentioned in your previous response that the ideal setting to use SIDE2 + U1MB is to enable the PBI BIOS. turn on the PBI HDD, put the side switch up and enable SDX in the U1MB. But after I created the partitions and formatted them, and verified they are working, if I boot the SDX from U1MB it does not recognize the CF card. If I load the SIDE.SYS driver, then I can see the partitions and use them. What am I missing?

  12. 1 minute ago, flashjazzcat said:

    Apparently it is not. Things appear to be all kinds of messed up.

    16GB is absolutely fine - no problems there. On an U1MB machine, there is absolutely no need to use the SIDE driver to run the hard disk, though. You should ENABLE the PBI BIOS and turn on the PBI HDD (enable the HSIO driver as well if you wish). Put the SIDE switch in the UP position and enable SDX in the U1MB setup. Neither SDX nor the loader on the SIDE cart itself need to be used when the cart is plugged into an U1MB machine.


    Not that this may make much difference to the reliability of the system. My pat diagnosis would be 'Rapidus: take it out', but - as mytek suggested - there could be more subtle reasons for such highly disruptive IO errors.

    Thank you very much for that! I will correct the configuration. 🙂


    I'm trying to get a different CF card (somewhat difficult on a Sunday afternoon on quarantine), and will see how it goes. If it does not work, I will remove Rapidus.


    Thanks again!

  13. 2 minutes ago, mytek said:

    16GB is not too big, but the speed rating of it might be too fast for the SIDE2, or it just doesn't like that particular card (some manufacturers are not supported). Can you take a picture of the CF card and post it here?


    Thanks! This is the one:


  14. Hi,

    I'm very new in this Side2 + Ultimate 1MB world (literally, I just got it 2 days ago and installed it yesterday), so this may be a stupid question, but I cannot figure it out:


    My setup: 65XE (no ECI), Sophia rev.C, Rapidus, Ultimate 1MB, Side2


    • Rapidus: 6502C
    • Ultimate 1MB: 1088K, XL OS 1.3, SpartaDOS X disabled, Boot to Loader disabled, PBI BIOS disabled
    • Side2: switch down, CF SanDisk Ultra 16 GB


    When I boot the computer, I get this screen:


    that seems to imply it is detecting some CF media. Because this is the first time using this CF, I ran FDISK, go to Initialize and I get:



    I After choosing that device, I get this screen:



    I enter some values in FAT and APT, it goes to a confirmation screen, press Save and get a message saying that the disk requires initialization. If I go to the Properties option, I get:



    Any ideas on what could be happening? Is the CF card not being recognized properly? Is there are a limit in the size of the CF, and 16GB is too big?


    The same CF, in Linux, works fine. In fact, I created a FAT32 partition, copied some ROMs and ATRs but, when I start the computer with the same configuration, but the SIDE2 switch in the up position, the Side Loader says "No media".


    Thanks for any tips and info!




    P.S.: I just tried the LSDEV command, and I get:

    Device: 2.0.1


    Controller: SIDE Driver v.4.0

    Size: 0KB 512bps


    the LSDSK command says "No devices found"


  15. On 2/12/2020 at 7:08 AM, DarkLord said:

    The only thing I noticed is that

    you might want to give a small warning about the hinge springs on the screen. I've

    been told that when you remove the screws they can "snap" with no tension on



    BTW, what interface did you decide to use with your internal US and your STacy?

    Ah, thanks for that! Added to the post. 🙂


    So, I bought the adapter for Mega STE (https://lotharek.pl/productdetail.php?id=49) and it worked perfect.

  16. On 2/4/2020 at 2:13 AM, DarkLord said:


    Please do keep us updated on your STacy projects - we just love this stuff!  :)


    Thanks for all the info, DarkLord! Another question for you: do you use the RTC of the UltraSatan or the internal one? If it is the latter one, what software do you use to set it/read it/display it? And how does it handle dates beyond Y2K?


    Oh, and I just posted the disassembly of the main body:




    Any suggestions are welcome!

  17. 6 hours ago, DarkLord said:

    This is good stuff. I did a bunch of upgrades including the internal US like Klund1 as well as

    installing a Pak 68/3 accelerator board and other things. Great project, great machine!



    Also, here is a pic  with the cover off:


    Oh! I have seen your posts, they are super helpful! Also, completely unrelated to your posts, I found your videos. Good looking machine in black. 🙂


    Also very jealous about the Pak 68/3. I don't think I will do that mod (I don't think you can find that card anymore, right?). But have a few questions for you:


    * I'm planning to keep the original color of the Stacy. Did you find what color matches it?

    * How did you hold the UltraSatan in the HDD place? What kind of bracket did you use? (but it seems that the internal UltraSatan that Lotharek sells now had 2 SD slots, so it may be different size than yours)

    * How was your experience replacing the EL sheet of the screen? It seems cheaper than buying a new screen ;-) Does it use the same 12V (I think it is 12V) of the original screen?


    Take care,



  18. On 1/31/2020 at 11:52 PM, KLund1 said:

    I put an Ultra Satan in mine to replace the dead HD. It also reduced the weight, and power draw.

    There is a poster called DarkLord here and Atari-Forum that did a Great series on his Stacy upgrades. He also did a few youtube vids of his project. You might seek him for advice, I have, and he was more than happy to reply.

    I would like to see where you cut the battery bay to fit your 2.06 TOS upgrade.

    I would also like do that upgrade. But I do not know anything about making a PCB. I can solder to one, though. Could you post a parts list and purchase links?

    There was talk a few years ago about a 'pico' psu that might fit into the battery bay, fyi.


    I am looking forward to further updates!!

    Since I wrote the first Stacy post, I have been emailing with Peter/Petari, and decided for a few changes on my quest to upgrade the Stacy:


    * Will no go for the TOS 2.06 upgrade. I don't mind the modification on itself, but don't want to have all the extra stuff inside the Stacy. And it seems there is little advantage for 2.06. So, instead, I will go with the TOS 1.04i (the one Peter modified).

    * Using the SCSI2SD interface does not make sense, because there are 2 interfaces (ACSI <-> SCSI <-> SD) and a lot of limitations. Instead, as you, I will use an UltraSatan (just ordered it, so it will take some time.


    What's your experience with installing the UltraSatan internally? What kind of bracket did you use to hold it? And how about the front?





  • Create New...