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Microvision homebrew? (part 8)

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atari2600land

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I've decided that I'm going ahead with this anyway. if I needed to learn how to solder in order to make it, then now would be the time. It looks like I need to learn also a fair bit about electronics, also, including how to read the map thingy. I just have one more question. How would I test my propeller game? Would I test it on a real Microvision? How do I connect the propeller chip to the Microvision? Would that involve taking apart a Microvision game and swapping chips? Reading on the back of the Propeller chip packaging (which I still haven't opened, and it's probably too late to return, one of the deciding factors in going ahead with the project), it has 32KB of rom, so I guess I could make a fairly complicated Microvision game without worrying about running out of space, seeing as how most Atari 2600 homebrews (like Chetiry, which is really complicated!) are 32k. The thing has 64k of EEPROM (whatever EEPROM is, see, I need to learn electronics!) I'm going to be brave and open it later today once I get enough braveness. If I'm going to actually program and sell the thing, it'd be at least $50 to cover the cost of the Parallax chip to put the game on, and then extra to buy Microvision donor carts. So with a little extra for profit, the thing may end up being $75, maybe extra if I make a box for each. I want to know how many people A.) have a Microvision, and B.) would be on board with paying $75 for a Microvision game.

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This is just my opinion. Anyone who has a working Microvision may not want to mess with it.

 

I'd pay $75 dollars for a new atari2600land-vision though :)

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How would I get enough money to make a me-vision? How much money did it cost to make the Microvision prototype? Besides, I have two working Microvisions, so it's not like they're hard to get, that is, if you spot a good price on ePay. I'd make sure it wouldn't harm one, I'd measure the voltage and everything.

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Nah. Sorry if I came off as discouraging your project. Maybe I'm just jealous because I don't have a Microvision myself :)

 

Arduinos and Arduino parts can be had for dirt cheap from Chinese distributors. I don't think an Atari2600Land-vision would cost much to produce. The enclosure/shells may be tricky, though.

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Well, the bidding of eBay item #221228468287 (a working Microvision with box and 3 boxed games) is only up to $11.50 with two days left. If you want one, maybe you should join in the bidding.

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The Propeller has an onboard 32K ROM containing the bootloader, SPIN interpreter, and some hardcoded data like a font and sine table. The 64K EEPROM (which is kinda like flash memory) is where your game would be stored when the game is turned off. The bootloader automatically loads the onboard 32K RAM from the EEPROM.

 

From my perspective there are two "do first" tasks:

1. Start reading up on the Propeller documentation and spend some time experimenting with the Quickstart board. There are sample projects explicitly for the Quickstart. Try to make a game which uses the 8 touch-buttons and 8 LEDs along with terminal I/O (via the USB serial connection). Your objective is to learn the new programming languages you will need to use to create your game.

 

2. Learn to read Dan B's schematics, then spend some time probing the Microvision LCD controller with your mulitmeter to determine the input & output voltage levels. Your objective is to determine whether it will be easy / safe to connect the Propeller directly to the LCD controller, or if you will need additional parts. (The Propeller has 3.3V inputs & outputs).

 

This then will lead you to the next step which is to use the Propeller to capture the input to the LCD so you can reverse engineer it and write a driver for the Propeller.

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