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Dreamcast BIOS chips (MX29LV160TMC-90)

Discussion in 'The ASSEMblergames Marketplace' started by Bad_Ad84, Jun 10, 2011.

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  1. Bad_Ad84

    Bad_Ad84 The Tick

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    No problem :)

    As I said, I'm not far from you so if you need anything just drop me a message and pop round.

    Also, once you have confirmed they are working ok, could you please post in the feedback forum for me?

    Thanks
     
    Bad_Ad84, Jun 19, 2011 Report
    #21
  2. grips03

    grips03 Rising Member

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    Hi I ordered 3 chips with Link83 bios pre-installed.

    thanks,
    Dave
     
    grips03, Jun 22, 2011 Report
    #22
  3. Bad_Ad84

    Bad_Ad84 The Tick

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    bump...

    Anyone who was waiting for feedback (because I'm a new member) there are now 2 people from this thread that have received their chips and left me feedback.
     
    Bad_Ad84, Jun 28, 2011 Report
    #23
  4. shuma

    shuma Robust Member

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    hey guys Bad_Ad84 is a great guy... ive done business with him previously on a modem site :) hes really good with his word too.
     
    shuma, Jun 28, 2011 Report
    #24
  5. eugene19

    eugene19 Rising Member

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    2 chips for me, shipped to Japan please :)
     
    eugene19, Jun 30, 2011 Report
    #25
  6. Bad_Ad84

    Bad_Ad84 The Tick

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    Which shipping method do you want? full tracking? or just cheap/basic?
     
    Bad_Ad84, Jun 30, 2011 Report
    #26
  7. eugene19

    eugene19 Rising Member

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    Cheap basic is fine thanks ^^
     
    eugene19, Jun 30, 2011 Report
    #27
  8. 8bitplus

    8bitplus Gutsy Member

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    Can I order 4 chips please. UK postage.
     
    8bitplus, Jun 30, 2011 Report
    #28
  9. grips03

    grips03 Rising Member

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    I got my 3 chips. Going to install tonight. I'm in US. If the BIOS is pre-installed from Bad_Ad84 can I just de-solder old chip and solder this one in? I wish the Dreamcast had a socket bios, like Neogeo.

    thanks
     
    Last edited: Jul 1, 2011
    grips03, Jul 1, 2011 Report
    #29
  10. Bad_Ad84

    Bad_Ad84 The Tick

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    Yes, that should work.

    Only reason it wouldnt work is if they should have been byte swapped before programming. I just programmed the file directly to the chip as received.
     
    Bad_Ad84, Jul 2, 2011 Report
    #30
  11. grips03

    grips03 Rising Member

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    Bad_Ad84
    Pre-installed Link83 bios works great the way you did it. Here is all I had to get it to work.

    Remove old bios with dremel cut wheel
    Lift legs 1 and 44 on new flash bios chip
    Solder all legs to dreamcast system board, besides 1 and 44
    put kapton tape under pin 1 and 44 and on rf shield facing above the bios
    solder kynar wire between pin 23 and pin 1
    solder kynar wire between pin 44 and near by chip pin 9, there is a pad near the "I" in IC501, used razor blade to remove green coating and then solder to pad

    That's it.

    Thanks again
     
    Last edited: Jul 2, 2011
    grips03, Jul 2, 2011 Report
    #31
  12. grips03

    grips03 Rising Member

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    Not sure how many people have used the flash in Dreamcast method with the switch, resistors, etc. But the pre-installed bios method is very easy to do, as you don't have to bend the pins and worry about if they break off. Now if they do break off its usually not an issue as you can dremel away some of the chip and expose some of the pin leg and solder to it. This just removes the "tricky" part of the mod.
     
    Last edited: Jul 2, 2011
    grips03, Jul 2, 2011 Report
    #32
  13. Bad_Ad84

    Bad_Ad84 The Tick

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    Please leave me feedback in the feedback forum :)

    Glad it worked ok
     
    Bad_Ad84, Jul 2, 2011 Report
    #33
  14. grips03

    grips03 Rising Member

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    grips03, Jul 2, 2011 Report
    #34
  15. grips03

    grips03 Rising Member

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    Bad_Ad84, I ordered 5 more with Link83 bio pre-installed today.

    Are you going to do the Saturn bios too? I'm converting one to jamma today and would like to use region free on it as well.

    thanks
     
    grips03, Jul 2, 2011 Report
    #35
  16. Bad_Ad84

    Bad_Ad84 The Tick

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    I can do that.

    However, I dont really like the idea of using a DIP42 chip and spider wiring to the original SOP pinout.

    Do you know what package the original chip is? SOPxx? 44/32?

    Id just like to get a chip in the same package for ease of installation. If I cant, then I can just start a group buy for the dip's.
     
    Last edited: Jul 3, 2011
    Bad_Ad84, Jul 3, 2011 Report
    #36
  17. grips03

    grips03 Rising Member

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    Here is pic of VA10 IC7 MPR-17940-T
    chip has 40 pins. 20 pins each side, and style wise it looks like the Dreamcast ones you have
    http://www.flickr.com/photos/20625046@N08/5897594161

    Here is pic of VA7 IC7 MPR-17941-U
    chip has 40 pins. 20 pins each side, and style wise it looks like the Dreamcast ones you have
    http://www.flickr.com/photos/20625046@N08/5898160002/


    DarthCloud used an MX29F800TMC-90 (SOP44) flash chip instead of eprom. He says the saturn use an SOIC40.

    http://www.assemblergames.com/forums/showthread.php?t=33602&page=3
     
    Last edited: Jul 3, 2011
    grips03, Jul 3, 2011 Report
    #37
  18. Bad_Ad84

    Bad_Ad84 The Tick

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    Thats much better.

    Ill get some prices from my supplier and start up a thread
     
    Bad_Ad84, Jul 3, 2011 Report
    #38
  19. Segata Sanshiro

    Segata Sanshiro speedlolita

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    Put me down for 2 please again. Blank or flashed, whatever you have. :)
     
    Segata Sanshiro, Jul 4, 2011 Report
    #39
  20. APE

    APE Site Supporter 2015

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    APE, Jul 4, 2011 Report
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