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manterola

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Posts posted by manterola

  1. Posted

    3 minutes ago, andymanone said:

    SpectraVideo (better known as "SVI") was one of the most popular Joystick companies in germany in the 80´s / 90´s ..... 

    The Quickshot series was legendary.....

     

     

     

    Yep... Same in Chile. Very popular for its quickshot series with 4 kind of plungers in the bottom that never worked  . I have one quickshot classic that I kept from that time, and then I got a couple of more sophisticated ones with switches and autofire. Not great quality

  4. Posted

    On 6/3/2020 at 12:21 AM, ChildOfCv said:

    So that one uses RC delays instead of LC.  Has anybody tried to build it yet?

    Not that I know. Maybe some friends from Europe can help us with the source of the design so we can ask there how this design has been working.

     

    • Like 1

  5. Posted

    To make the opening for the  connection I just used an Stanley knife. It can be done with an exacto knife, I just marked the position with a pencil and then very carefully did both sides, and then I moved downwards by cutting little slices, like cutting pieces of cheese to eat., until I get to the desired deep. I finally use a file to the final touches. I wasn't bad, or maybe I was expecting the worst given tmp warning and I just got lucky.

    I soldered the connector in the opposite side of PCB (opposite to the one shown in the pictures), so maybe that made the difference...  if you do that remember that the wires colors will be different than the pictures posted.

    My AVG cart as that black plastic case. 

    • Like 1

  6. Posted · Edited by manterola

    What about booting with Start pressed , or typing something, and hear the sounds out of the speaker, or trying to boot a disk, etc?

    I don't think it is the cd4050, otherwise you will be able to observe other signs that would tell you that the computer is alive.

    Just because we discussing about the delay line in other topic (probably you already check that), maybe you can measure if the delay line is working properly by measuring the actual delays produced by it

     

  7. Posted · Edited by manterola

    28 minutes ago, Kyle22 said:

    Someone has done this already. I just can't remember who. It was from Poland or Eastern Europe IIRC.

    I saw it a few years ago.

     

    It was already linked few posts earlier. 

     

    post-13325-0-33217300-1537089170.gif

    • Like 2

  8. Posted

    On 6/1/2020 at 7:15 PM, tmp said:

    there is a beta firmware that has some preliminary support for sio mod (atr, atx, cas), so if you got the mod done, just let me know (and don't forget to share a photo!)

    Here is my cable and cartridge. Thanks, @tmp, for this great add on.

     

    52202021624.jpg

    52202021523.jpg

    • Like 1

  9. Posted

    I have two XL with failed delay line (and cd4051 problems, keyboard). Best is the unique source of delay lines... until it is not.   So I was basically trying to understand the same, how special this IC is, and it looks like it is not special at all, and it might be possible to reproduce with new delay lines ICs or even it was suggested (?) that the Atari IC might be  just a standard one with some legs removed.

    There is also a circuit to produce the delays with an LS14 plus discrete components (thank you @1050).

     

     

  11. Posted

    Can an Atari delay line be reproduced with modern components? and more important... can be done easily and conveniently? Maybe it is a good project to learn a bit of KiCAD and build something based on SMT delay line standard and cheap components.

     

     

  17. Posted

    Finally I realized the Crystal was the source of the problem: as soon as I removed it, the clock seconds started to advance. The advance was first  like 2 seconds, but by touching the board the seconds keep advancing, probably by picking up noise. there was point in which the clock advanced by itself without crystal every 5 or 6 seconds (very slow). Then I connected a new (old) crystal (same frq) I found in a box of random electronic stuff and the clock worked immediately, even without the load capacitors which I removed to see if there were the source of the problem (I replaced them after the crystal was in place).

    So, I did all of this because returning this to Poland looked very complicated and time consuming and I wanted to give it a last try. 

    In conclusion: a happy ending.

     

    • Like 7

  19. Posted

    10 minutes ago, AtariGeezer said:

    I ordered the same day and mine arrived 2 days ago, so yours should be any day now...

    Are you still offering yours? how much should be to mail one in an envelop to Wash, DC area?

  21. Posted · Edited by manterola

    I can check which model I have used, at least for the Samsung I have now connected, so you can get one easy on ebay at a better price than the specific ST floppy drive you are using now.

    I also think that the most common sony drive you get in ebay (mpf920)  that you can get for $10 or so might work... I am not 100% sure, but maybe for 10 bucks (or maybe a bit more from a Canadian seller) you might want to try and tell us.

    Edit:

    I found it! 

    It is a SFD-321B. As I told you it is a very generic Samsung drive. 

     

     

    4202020174732.jpg

  23. Posted · Edited by manterola
    found a link

    I got 3 EMMUs (CO25953) from an UK seller in Ebay, at good price. Probably still around. That was my first hardware modification ever to any of my Ataris. It is very straight forward and you get a 130XE with 65XE or 800XE badge. That simple upgrade allowed me to play Bosconian (with voice samples), Stunt car racer, use sector copiers (copy diskettes in 1 pass),etc. 

    Now if you have a 65XE with ECI , getting SysCheck is also pretty nice, since you don't need to open the computer and solder anything.

    Edit: I found this link. I don't know why is not showing in other ebay sites... even when the seller is based in UK.

    https://www.ebay.pl/itm/NEW-Atari-computer-16-DIP-IC-130XE-65XE-65-130-XE-C25953-20-EMMU-memory-IC-chip-/152097265933

     

  24. Posted

    I checked the crystal connections to the capacitors and to the pins 3 and 5 of the ds1305, everything is correct. I applied a bit of solder to the crystal and capacitors just in case. 

    Capacitors are connected to ground in the other side, so that should be right. 

    I also checked continuity between every pair of legs of the ds1305 and inspected using a magnifier glass, everything is correct. I don't know how returns work, but it sounds complicated, given the current state of affairs.

    Maybe I should try a new crystal since it look easy to replace given it is a thru-hole component. 

    Not sure, but it look like everything else is working, the only other weird thing that happened was that uflash crashed when I tried to update side2 using the sio2pc (it get stuck in the roms file selection). 

    Ah BTW, yesterday I also tried downgrading the firmware, the SDX, upgrading again, removing and replacing the battery, reload factory settings, etc. But at this point everything point to the crystal or the ds1305... Right? 

     

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