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Wickeycolumbus last won the day on January 4 2010

Wickeycolumbus had the most liked content!

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About Wickeycolumbus

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    Red Sea Crosser
  • Birthday 09/21/1993

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    Atari 2600 programming
  1. Wickeycolumbus


  2. 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?
  3. 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.
  4. Could be North American Philips? Nice looking monitor.
  5. 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').
  6. Thanks! Different sources over the years. Wish I had the luck to find one in the wild!
  7. 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.
  8. Here are some cartridge pics. The collection is getting respectable
  9. Hey guys. Just picked up some loaner cartridges, here is something interesting. A new WIP of Dumbo. Some things that I notice right away are the lack of sound and different title screen. The attract mode was still being implemented at this point as well. Movement is different from the final and other WIP version (5/5/83). There are some minor graphical differences too, like the bomb balloons. The balloons come up in different patterns too, and the levels are called acts. The scoring 10,000 to get PCN easter egg does not seem to be present either. I also got an Atari loaner of Donkey Kong and Demon Attack. Of course, nothing interesting to see here, same as the retail releases. I meant to take some pictures of the cartridges, that will have to wait until Sunday. Anyway, enjoy, and please share your findings Dumbo's_Flying_Circus_4_4_83_WIP.bin Donkey_Kong_Atari_Loaner_Cartrdige.bin Demon_Attack_Atari_Loaner_Cartridge.bin
  10. Interesting, thanks for the info guys. I guess it does make sense that the service center would have a universal bottom half like the link suggests. Wonder if they were ever sold new this way.
  11. Hey guys, picked up this 4 switcher at a flea market today, thought it was a bit curious. No serial number sticker. Maybe its a reconditioned unit? Or someone just did it themselves? Anyone ever see something like this?
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