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Blog Comments posted by 5-11under

  1. That's some wild EQ settings you've got there, but if it works well, and nothing is jumping out or being lost, then I guess it's all good.


    Definitely, speakers need to be #1, and its sounds like you're in good shape there, from what you're saying. With a cassette deck (as opposed to a CD player), obviously you need something at least half-decent and in good working condition, and just looking at your brands JVC and Onkyo, you've got some half-decent middle of the road stuff that should be totally fine for most applications.

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  2. One of my goals over the next year is to provide the required elements so that anyone, including yourself, would be able to create their own Microvision game relatively easily.

    This would include being able to provide any or all of these:

    • Printed materials (and templates if you'd rather get them printed yourself):
      • Manuals
      • Boxes
      • Main label
      • Keypad overlay
      • Bezel
    • Circuit boards, programmable by the user. Boards would feature an Atmega328, that would be programmed using a fairly cheap EPROM programmer and edge connector (other methods may also become available). There's no emulator for this method (using Atmega328 instead of TMS1100), so at this point a programmer and real Microvision are required to test programs that are made.
    • Programming guide and sample program(s), for the Arduino IDE, including all basic requirements for the Microvision.
    • Shells. There's a few options available, but they all come with cost and/or quality limitations. This one will take the most time, and I'm guessing will also have the greatest cost.

  3. For prototyping purposes, you can remove the original chip, and attach wires as required. between the propeller PCB and the Microvision PCB.


    For the real deal, however, you would likely be designing an original PCB that would replace the one in the Microvision cartridge.


    To open the Microvision cartridge, you should see a screw in the middle of the back of the "top" half of the cartridge... near where the PCB edge connector is. There is usually a small sticker covering the screw. Remove the sticker from the back, remove the screw, and the back cover (covering the PCB) should come off easily. Take it off slowly so you don't lose the springs that hold the door of the edge connector closed until inserted in the Microvision.


    edit: the fifth picture here shows the back of the cartridge, this time with the sticker "beside" the screw: http://nzgamer.com/srassy/blogs/686/microvision-console-review.html

  4. I don't have my notes or data with me right now, but here's what I recall:


    1. Send info for one (or more) rows (that will hold the same column data) (4 varying data bits pulse-latched 4 times, for 16 rows)

    2. Send info for the column data for that/those row(s) (4 varying data bits pulse-latched 4 times, for 16 columns)

    3. Send strobe pulse (I call this one the minor strobe)

    4. Repeat the above 3 steps for a maximum of 12 times total (not sure why this limitation of 12 exists, but all the games seem to follow it - no game use more than 12 rows with distinct data on it at any single point in time). At this point you basically have one "frame" which should hold all the current screen information

    5. Hold the latch active, send a strobe pulse, then release the latch (I call this one the major strobe)

    6. Repeat all the above steps ad infinitum with new or the same data, as the gameplay prescribes


    I don't recall the timing, order of the rows/columns data, or whether the system uses positive or negative pulses, but that is pretty easy to figure out.


    If you look at the FAQ (http://www.handheldmuseum.com/MB/MicrovisionFAQ.txt for instance), you should be able to "translate" between my language and the FAQ's language.


    /please don't ask why I know all of this, or why I have dozens of spare Microvision carts lying around... it's a secret.

  5. Bowling and Pinball are my favourites. Blockbuster is alright, but is really fast, I find. I should figure out Baseball... it might be fun, too.


    I guess I forgot to get back to you on the games you needed. Glad you found them somewhere, at least. I don't think I have a spare box for Cosmic Hunter.


    Anyway, it's good to see someone else who likes the Microvision as much as I do.

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