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Found 3 results

  1. I've been hinting that this was in the works for a while now. And I figure its time to start revealing a bit of what I have been working on for the last 1-1/2 years. I call it the 1088XEL. Why? Well for one thing thanks to Lotharek's U1MB board and the on-board 64K RAM, there is a total of 1088K of usable memory. Basically the idea behind this project is to create something that is designed from the ground up to accept some of the most popular upgrades as plug-in daughter boards. Yes no more making up wire harnesses, crimping terminals, scratching your head and trying to figure out where to mount things. The other goal of the project is create a very small footprint mother board. I'm talking about something in the area of 6" x 6" (15x15 centimeters). And to utilize only thru-hole components, as well as the original five A8 LSI chips (Sally, Antic, GTIA, Pokey, PIA). Actually there will be an additional Pokey on board to support Stereo Sound. If you've been following some of my other projects, then you've witnessed the nesting technique I wish to exploit when laying out this board, which is how I will get it shrunk down to such a small size without resorting to surface mount devices. The first prototype will initially be created as an NTSC version board, but will provide support for an upgrade path to PAL via a future daughter board design, an oscillator change, and of course PAL Antic and GTIA chips. I have taken some liberties at reducing the component count by eliminating capacitors, some support chips (through utilization of SRAM memory), and just not caring too much about RFI radiation issues. Me bad So for all intents and purposes this will still be a 'real' Atari 8-bit computer as far as the basic hardware is concerned (not an FPGA implementation). Now for the big reveal (please keep in mind that these are preliminary schematics, and that the design is still in flux, so in other words there might be a few mistakes and omissions )... - Michael
  2. I recently bought a broken intellivision off of eBay, and after messing around with it i believe that the problem is the CPU. I don't have a working unit, or any other units for that matter. I was hoping i could find a new cpu (preferably a whole board, in case there is any other problems with it) from someone on this form. I really want to try and play some intv games, especially since they are cheap.
  3. I wanted to add my question into the correct post/forum, so hopefully I've done that, if not, I apologize. I’m looking to learn more about this Atari 2600 that was given to me. Atari 2600 Property of Atari Inc. Sunnyvale, CA 94086 Manufactured: 1977 Manufactured by: TRW Electronic Components Company In Taiwan Model: CX-2600 Box: Copyright Atari, Inc. 1978 Light or Heavy Sixer: Not sure? I have a question (or maybe questions) about my Atari 2600 (CX-2600) that was given to me several weeks ago. A friend of mine passed away in 2007 (age 38) due to a chronic disease that he had all his life, and I've kept in contact with his Mom for the past 6 years. She learned (from my e-mail signature) that I liked Atari. She asked if I wanted her son's (Charley) Atari 2600, because it had been sitting in the closet for 25+ years. I said yes. She sent the Atari 2600 with the original box (Copyright Atari, Inc. 1978), but the motherboard inside reads copyright logo © 1977. She said they got it for Charley the first Christmas that the Atari came out, so why would the box read 1978? I opened the console and took it apart to clean the inside. I was shocked to see that it was spotless. The inside cover of the Atari console was a bit dusty, but other than that, it looks and works great. The switch board and main motherboard both read © 1977 (pictured), but 3 out of 4 chips (4th has no date on it) read 8108, 8120, and 8121, which I thought that meant the year (1981) and the 8th, 20th, and 21st weeks of that year. I noticed the piece of paper taped to the top of the EMI shield cover reads the letter Z (it could be 2), and also the date (in red) July 13th 1981. From what I've gathered from the enclosed photos (with detail), my friend received his Atari 2600 in 1978 (made in 1977), but... had it worked on in July of 1981. Something must have happened to where they had to replace 3 out of the 4 chips inside the console. They didn't have to replace anything (chips) on the switch board, just the main motherboard. I could be incorrect about my assumption(s). None of the boards have been replaced. Does this all mean they had it repaired in 1981? Why does the box read 1978 when it was built in 1977, unless it was built in late 1977? Is this Atari 2600 a Heavy Sixer? It looks more like a light sixer. I noted which chips were replaced. I apologize for the flashlight, but I wanted to note the dates perfectly. Again, I apologize for so many pictures, but I've read on here that people want pictures if someone is having a problem or question. Thank you for your help.
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