HDMI Output on a Nintendo 64

Discussion in 'Modding and Hacking - Consoles and Electronics' started by Hexx, Nov 6, 2012.

  1. OzOnE

    OzOnE Site Supporter 2013

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    If you're looking for the N64 schematics, I think we've got that pretty much covered...
    http://forums.benheck.com/viewtopic.php?p=332745#p332745

    The old links to the files don't work now, so I've just uploaded it again...
    http://www.multiupload.nl/9UVS5AMHEP

    The schematics were opened in Eagle 6.0 though, so you'll probably need that to use them.

    They include almost everything apart from the voltage regs for +5V and the VTERM reg for the Rambus DRAM.

    It also doesn't include the tons of small decoupling caps or the very small IC's / transistors / Reset IC (mostly on the underside of the board).

    If this is ever used for anything, the pinouts will need to be doubled-checked too.
    I'm fairly sure that the RCP / CPU / PIF / CART pinouts are correct now, but I can't be 100%.

    I might upload my "HDMI" Verilog source at some point, but I never got around to finishing / testing the HDMI part of it.

    @rerep, yep most modern TV's should still support the standard 240p / 480i / 576i modes via HDMI, but there probably are exceptions.
    VGA can give a great image from an N64, but only if you code a decent scaler for it like Marshall did (he used a nice DAC too).

    tbh, the RGB DAC on the US / Jap machines aren't that great anyway without a good buffer. Ahhh, found it...
    http://www.mmmonkey.co.uk/ntsc-nintendo-64-rgb/

    I used one of those THS7314 chips on my US N64, and it gives a much better image (just remember to keep the wires as short as possible and taped to the ground plane).

    @Hexx - I'd definitely recommend you at least buying an Arduino or something first, then possibly moving on to an FPGA.
    There are some nice FPGA boards available from China now, this is what I'm using on the 64DD...

    http://www.ebay.co.uk/itm/Altera-FP...182?pt=LH_DefaultDomain_0&hash=item4607a63a7e

    For a few dollars more, they supply the "USB Blaster" clone programmer for it too.

    They're fantastic for the money as a starter, but if I was to do it again, I'd recommend buying the proper Terasic / Altera board...
    http://www.terasic.com.tw/cgi-bin/page/archive.pl?No=364
    http://www.terasic.com.tw/cgi-bin/page/archive.pl?No=83

    If you're in Uni, you should get the "Academic" discount too.
    The DE0 is good for the money, but it's worth getting the DE1 (IMHO), mainly because it has SRAM as well as SDRAM + Flash.

    I wish I had SRAM when I first started the Dreamcast GD Emu project, it would have saved me TONS of unnecessary work.
    You see, SDRAM is OK for certain things (CPU cores etc.), but is a proper PITA to use it for things where timing is critical (like a framebuffer, or the DC sector buffer).

    Anyway, that's my two cents. :friendly_wink:
    Go for an Arduino first though, they're super cheap these days and the software is free.
    Personally, I don't like the Arduino software, so I just use AVR Studio + avrdude instead (also free).

    OzOnE.
     
    Last edited: Jan 29, 2014
sonicdude10
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