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Wickeycolumbus last won the day on January 4 2010

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About Wickeycolumbus

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    Red Sea Crosser
  • Birthday 09/21/1993

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    Atari 2600 programming

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  1. Thanks for the update, I look forward to it every year
  2. Thanks for all your work, and for sharing!
  3. Info posted here: If you are interested, I would be willing to send you one of the boards
  4. All of the prototypes being found lately got me thinking, there should be an easy and cheap way for the owners to dump the ROMs. I have tried to ship a dumping setup to proto owners in the past (with some success), but the setup was too complicated. It required an Atari, TV, and other parts. It was too clunky to ship around. This project is a dumper based on the Arduino Uno, an easy to use microcontroller development board that can be bought for as little as $5. The attached .zip file includes some instructions, and a program that will allow you to dump Atari 2600 cartridges to a PC with a USB port. A small circuit (called a 'shield') is connected to the Arduino board, and the 2600 cartridge plugs into that. A cartridge can be dumped in less than a minute without modifying anything or using specialized equipment. I have currently tested it with 2K, 4K, and 8K F8 cartridges. The code can be easily modified to support other bankswitching schemes, but I do not have cartridges handy to test others at the moment. Source code for the Arduino program is included in case someone wants to experiment with this. One design change I would like to do if I made more boards is to connect the cartridge A12 line to Arduino pin 13, so that bankswitching schemes that use hotspots outside of the cartridge address space can be supported. Atari 2600 Arduino Cartridge Interface.zip
  5. Finally got around to doing this, it works Will post more info soon.
  6. Cool, nice find Interested to see the ROMs too if you can dump them. Someone should put together an arduino based dumper that would be cheap/easy for proto owners to put together. I usually dump the ROM to a savekey (a memory card in the right joystick port) and then dump that with an EPROM programmer. Thomas Jentzsch wrote the 2600 side sw. When we came up with that idea, we were planning to ship a system out to proto owners so they could dump their games. We did get some games dumped, but the whole system is pretty large (requires a real 2600 and tv..) so it is a pain to ship, especially overseas.
  7. This is a great find, thanks for posting. Looking forward to see what else was found... so strange that they are from so many different publishers. Do you have the story for how the programmer came across all these files? Any chance source code would be released as well?
  8. Wickeycolumbus


  9. No problem, ROM, and everyone else I noticed in your latest collection, you added the former title 'Dumbo Flies Home' to the file name. Could you share any information about that?
  10. Thanks ROM, Merry Christmas/happy new year to you! Did anyone else have trouble unzipping the file? Maybe I need a newer version of unrarx.
  11. Could be North American Philips? Nice looking monitor.
  12. Hi there, welcome It is important to understand that the TIA continues to do it's thing without instruction from the CPU. The CPU's job is to set the registers in the TIA (at the correct time) to change the picture. The TIA will draw the same line over and over again if the registers are not changed. This is just like what happens when you turn on the console without a cartridge. When you execute a NOP instruction, you are not changing any registers, but you are wasting 2 cycles of CPU time. The TIA will draw 6 pixels in that time (6 'color clocks').
  13. Thanks! Different sources over the years. Wish I had the luck to find one in the wild!
  14. Was going to post that when I saw this thread There's some information about it in my old thread, but I never drew up any schematics. I can give more info if anyone is interested. http://atariage.com/forums/topic/226940-diode-matrix-rom-for-atari-2600/ Shortly after doing that 64 byte cart, I designed and started building a 16 byte ROM with just transistors and diodes. Probably have the ROM somewhere, don't remember exactly what it did. I ended up giving up on the cart part way through building it because I discovered that I had damaged some of the MOSFETs (ESD?) while building it, and construction was very painful because I was handwiring SMD parts onto a board like the one in the video. May go back to it some day, just thought it would be cool to have a cartridge with no integrated circuits . It's always fun to squeeze something into a tiny ROM.
  15. Here are some cartridge pics. The collection is getting respectable
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