11/9/2023 0 Comments Magnavox odyssey 2 consoleWire the remaining address lines from the EPROM to the switch bank. Using the pinout you downloaded for the type of EPROM you've chosen and the diagrams above wire address lines 0-10, data lines 0-7, CE, OE, 5V and GND from the PCB to the EPROM. I used GREEN for address lines, YELLOW for data lines, RED for 5V, BLACK for ground and PURPLE for everything else. I found that the easiest way to keep track of everything during this step was to use different coloured wire for each type of connection (this is invaluable for debugging afterwards, or in 6 months time if you decide to change out your EPROM chip for a larger one). Wiring is the most time consuming step, it's also really important that all the connections be well soldered and that no shorts are made. Use a de-soldering pump and braid to remove the chip and once you've done that you'll be left with a PCB that's ready to take any size EPROM you want to put on it. You'll be replacing that chip with a much larger one and a bank of switches to let you choose between all the different games you'll be flashing to your new EPROM. Next you need to remove the ROM chip that's soldered to the PCB. Now that you've liberated the PCB the first thing to do is remove the spring that's wrapped around the PCB and store it away safely. It's worth noting that he PCB can be removed without opening the cartridge completely. Be aware that the metal PCB protector may spring out when you separate the two haves. Underneath you'll find 2 cross head screws, remove them and gently separate both haves of the cartridge. To do this firstly peel back the bottom left and right corners of the label on the front of the cartridge (use a hair-dryer to soften the glue if you don't want to damage the label). You'll have to open that cartridge if you want to screw around with what's inside it. Also I'll be using a M27C1000 EPROM for the build (but feel free to use any 27 series EPROM you have lying around). However to keep things as simple as I can, in this instructable I'll be using a 2Kb cartridge with a set of 2kb games. This means that in most cases a 2Kb cartridge can only be used for 2Kb games, 4Kb for 4Kb games and 8Kb for 8Kb games. Game cartridges for this system come in 3 different flavours. Or you could just do like me, and wing it. Not to mention a doctorate in computer science from a world recognised bastion of higher learning like Cambridge or Harvard and all this even before you can consider starting into it. If you want to join the ranks of Ninja level Engineer and build yourself a Cartridge that contains loads of games for you to play on your Odyssey 2, or Philips C52 or whatever name it's going under where you live, then you better get studying, you'll need a high level degree in advanced mathematics and electronic engineering. So how could I get a taste of what this old console had to offer? Why, build myself a multi cart of course. I still had one problem though, I didn't have many games for it. I picked up a Philips branded one a few months ago, the "C52" and coaxed it into working again. One of which was the Magnavox Odyssey 2 (which was known under many other names across the world). Then in 1971 Nolan Bushnell and Ted Dabney created the first commercial arcade cabinet which housed a game based on Space war called Computer Space which became a huge commercial success and led to the founding of Atari, the company which gave us Pong and of course the Atari 2600.Ī lot of consoles were made and thrust into direct competition with the Atari 2600 in the late 70s. In 1962 came Space war created by Steve Russell but could only be played by those who had access to a computer (not easy to come by in the 60s). The first video game ever was a tennis game that was played on an oscilloscope, created by the Physicist William Higinbotham in October 1958 for the Brookhaven National Laboratory open house. At times we take it all for granted and don't spare a thought for the seeds that started it all, the source, the well where all gaming sprang from. Videos games are great fun, high resolution graphics, 7.1 channel sound, immersive 3D environments and online multiplayer gaming have all appeared in the last 20 or so years. You can find lots more of this kind of stuff here
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