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Found 8 results

  1. Hi, yesterday I´ve found an interesting thing, which I didn´t know until now. On pin "S" of the cartridge-slots of an Atari 800 there´s not the "PHI2" signal attached as on all newer machines - there´s "RAS" connected. The falling edge of PHI2 and RAS is nearly the same, but RAS is much shorter low than PHI2 (of course, there must be some time for CAS, too). Most modern circuits (in flash-carts or flashable carts) sample the PHI2 signal for their logic. So I think, this might be most significant reason for problems while writing to flash-memory or using special carts like the myIDE II. See the signals on the scope: So I try a little modification and use PHI2 on pin "S" instead of RAS. And these seems to be the solution... myIDE-II works now without any issues in an Atari 800 with Incognito. Also some other carts with suspicious failures works now. I test this on two Atari 800 equipped with Incognito. On one machine I take the Incognito out and re-install the old genuine personaliy and RAM cards. Also everything works fine. I have only one cartridge with "Write to cart" features which works on the original old 800 system: Telelink II. But this also works fine with that patch. If you want to do this patch by yourself, here´s a possible way: Cut the RAS trace on the place in the picture. Connect pin "A" and pin "S" on the "right" cartridge slot together - that´s all! This mod is independent which TV system you have, it works also on NTSC as on PAL or SECAM. Regards, Jurgen
  2. Over the past few months I've been given many Atari hardware items and software. These belonged to a friend of mine who was an avid member of the local Atari user group. He died about two years ago, and his son passed away about a year ago. I have been receiving various bits of documentation, paperwork, hardware and software from their family members in the time since they passed away. I've been asking what has and has not been archived and I've been doing my best to make sure that it has been archived (thanks to Allan Bushman for scanning and taking care of this 8-bit material-- he's such a great archivist!). Until this point, I've not given too much thought about using some of the hardware like the 1050/810 disk drives. These were all stored in an outdoor barn/shed. All of the hardware (the computers included) is very dusty and I'd be shocked to learn that any of disk drives work at all. A couple of months ago a friend of mine suggested that he would like to see an Atari load-up some floppy disks to play some games. We can do that already, as I have a disk drive emulator for the Atari and various AtariMax flash carts, but he wants to see some real 5 1/4" floppies booting to some game or other. In addition, included in the last batch of Atari items that I was given, was quite a bit of the Atari 8-bit public domain PD library on 5 1/4" floppy. It might be neat to load some of that stuff up on real hardware. My question is: is there a FAQ or repair/restoration manuals and/or videos on how to go through and restore Atari 810/1050 disk drives. I guess, at the minimum, I'd need to learn to clean/lubricate gears/motors/heads. Adam P.S. I also have several Atari 410 program recorders, but I'm not sure that restoring those would even be worth the effort. Or is there a reason to have these around?
  3. I completely took apart one of my SACs, cleaned every contact and connector. I still cannot get any keypad buttons to function. I have two controllers, and not one working keypad button between them. I know the commonality of broken SACs has been brought up before. But has anyone actually successfully repaired the keypad on their Super Action Controller? If so, could you share what you did to fix it? Thanks,
  4. Yo guys, I'm having problems with a colecovision i found in my grandads garage that used to belong to my uncle. The unit used to work absolutely fine till the day he put it away. Ive already done some troubleshooting with it, I've actually replaced the power switch and ive tested the voltages from the power supply and all seems to be fine but no matter what i do, i can't get it to work properly. It keeps displaying garbled graphics and wont load games properly. Sometimes it shows the coleco load screen with game name but all the letters are screwed and may sometimes also go to the blue selection screen but wont do anything. I really wanna fix this thing in time for my uncles birthday for early next year as he has fond memories of it as a child. Here is a video i posted on youtube of the problems I'm having:
  5. Hi, everyone! This is my first post and I'm already asking for help... Anyway... I just got myself an Atari 2600, it's the so called heavy Sixer (I guess... I can't really tell, but since it's way heavier than my Darth Vader one, I guess this is it). to my demise it has that constant player 1 fire button problem. I've read several posts here about it, and most of the time they said that the issue is with the 4050 buffer chip. I tried to look for some sites around here ( I live in Brazil) selling it, but not luck so far... But the is another solution "the bypass"! I saw a picture of the schematics on a post, but since I can't really understand these things I wonder if someone can make a "for dummies" explanation for me... I really want to "save" my new-old beast.
  6. Ok so I bought an Atari 1010 Program Recorder for my Atari 400. I hooked it up, typed in a short program and did CSAVE. It seemed to work, the tape turned and computer made the correct noises. I then rewound the tape and did CLOAD. Unfortunately all I got was Error 138. I tried this several times with different tapes; I even opened a brand new tape, with the same result. I put the recorded tape into an old boom box to see if the program was actually recorded, and the sounds coming out of the speakers did not seem right (but I am not an expert). They were only coming out of the right speaker and were low in volume and were not exactly the same as what came out of the computer when saving. However I read that the Atari Program Recorded somehow records thing a bit differently then what I would have seen on say a Commodore or Timex, so I am not sure if that is the problem My question is what can I do to make this thing work, are there any standard fixes/tests that I can do to make this Program Recorder work. My first instinct is to clean the head, but where do you get a tape head cleaner in 2012
  7. I recently got a Atari 800XL from a local classifieds but I am having issues with it. The power light comes on however the display not working, there are some funny colors and lines (image attached). When I type on the keyboard there is no sound. When I insert a cartridge there is no sound from the game starting screen. Basically it does not just look like the display is garbled its almost like the computer is also not responding. I opened the Atari to see if there is something obvious like a burned cap, but I can't see anything. I took high rez photos of the board on both sides. Can you guys please have a look and try to point me in the right direction. Thank you for all your help, please help me save this Atari,
  8. I added an article to BallyAlley.com called A Power Transformer Substitution for the Bally/Astrocade Computer System by Michael Matte (MCM Design). Michael wrote this article in April of 2018. If your original Bally power supply fails, and you have experience in electronics, then these detailed instructions with schematics and picture explain how to build a substitute power transformer. You can read the article in various formats, here: http://www.ballyalley.com/faqs/faqs.html#AstrocadePowerTransformerSubstitution Here is an example of the finished power supply (more pictures are included in the article): Thanks to Michael for writing this article. Enjoy! Adam
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