RGB Triple Bypass – Update!

The Triple Bypass is a mod which encapsulates 3 important things for Genesis: RGB Bypass, Mega Amp audio, and CSYNC level selection. Alot of you have been asking for an update to the Genesis Triple Bypass project. Well, the latest progess, as of July 8th 2017, is I’ve just finished the layout for the 0.2 version of the bypass. Prototypes for this version will ordered within a few weeks.

Changes from version 0.1:

  • Moved the Mini DIN 9 connector to the bottom layer to facilitate installation in Model 1 Genesis.
  • Added jumper to enable/disable the THS7374 internal filter
  • Added jumper to select CSYNC voltage between TTL and video level
  • THS7374 video inputs now DC coupled
  • Added jumpers to bypasd internal audio Mega Amp


Electronics engineer and retrogaming fanatic!

30 thoughts on “RGB Triple Bypass – Update!

  • 2017-07-09 at 11:35

    Can’t wait to see that René ! Love your product man !

  • 2017-07-12 at 16:19

    I have been following this project with baited breath for about a year now. I’m really looking forward to it.

  • 2017-07-12 at 19:03

    Hi, is there any chance of getting discrete TTL H/V sync signals through the “SYNC” and “CVBS” pins on the mini-DIN selectable by a jumper? (Who needs CVBS anyway? S-Video on the other hand..) Then a VGA+audio out cable would be simple to make. Or am I the only one interested in something like that? (If so then please ignore.)

    • 2019-06-06 at 15:16

      Lol, actually many broadcast and professional video monitors require a composite HV sync signal as input for RGB video, as opposed to separate signals. I have a Sony BVM-A20F1M using a BKM-68X expansion card which operates this way.

      Concerning VGA, I can relate to you somewhat, although for a different application. Getting my Dreamcast’s VGA into my TV requires me to build a sync combination circuit. So I would argue having both C/HV sync could be useful for different applications 😂

  • 2017-07-13 at 04:14

    So happy reading this news! I look forward to reading more about it!

  • 2017-07-13 at 17:35

    I am desperate for a solution to the jailbars on my Japanese Mega Drive. I’ll snap up one of these as soon as they are ready!

  • 2017-07-21 at 21:07

    Will this work in any model Genesis as a “cut-free” mod?? Will the instructions denote where the different resistor values on the audio amp would need to be changed? Will this output composite video also (the labelling is hard to read)? Does this board have the capability to output S-video? (I know a guy with an S-Video CRT….)

  • 2017-08-27 at 01:25

    Can’t wait to get a few of these. Is it going to be compatible with both the MD1 and 2 as well as the Master System?

    • 2017-08-28 at 08:53

      Technically it’s a rather generic RGB amplifier so it could be used in many places. The audio portion is definitely tailored for Genesis and the PCB design is specifically made to fit in a Model 1.

      • 2017-09-01 at 20:46

        René do you have any idea when these will be available and who may be having them assembled? My body needs this.

        • 2017-09-01 at 21:32

          I have the latest revision on order for testing. Should be in within one month.

          • 2017-09-02 at 10:05

            Awesome! I have Genesis 2 mini-dins ordered from china for whenever I can get my hands on one of these

          • 2017-10-02 at 15:55

            no news?

  • 2017-10-11 at 21:42

    Can’t wait for this! Really hoping that it’ll squeeze inside my Genesis CDX.

  • 2017-10-18 at 18:51

    Still waiting patiently. Really want this.

  • 2017-10-19 at 16:10

    Rene would you consider implementing Borti’s IGR into your upcoming bypass boards?
    https://github.com/borti4938/Switchless … aDrive_IGR

    It would be very helpful for those of us with everdrives– as it is currently, the X7 is the only model that works with getting back to the main menu in game (and not for every game)– however it doesn’t work for master system games (in genesis) or 32x games. An IGR implementation– similar to what is in Borti’s N64 board– would be siiiiiick. Thanks <3

  • 2017-10-23 at 18:28

    Can’t wait to order this. Have a genesis open and waiting!

  • 2017-11-13 at 20:05

    Any updates sir?

  • 2017-11-23 at 00:22

    OMG – I need like 4 of these, cant wait to get these.

  • 2017-12-14 at 03:06

    Where can I order this?

  • 2018-01-23 at 23:53

    So can I file this project in the “dead” department?

    • 2018-01-24 at 07:18

      No, I just have more pressing projects with large quantity orders that beed to be taken care of before I resume work on the Triple Bypass. This is just a hobby for me…

      • 2018-01-24 at 09:38

        You seem to be the only one who is making the boards for the genesis bypass. I there anyone else that we can get the rgb boards for the sega genesis from?

      • 2018-01-24 at 22:47

        That’s no problem. Just haven’t heard anything in quite awhile. Glad it’s still going.

  • 2018-02-16 at 12:35

    My model 1 and I appreciate your work on this…looking forward to it!

  • 2018-05-14 at 12:47

    Ah so this is the board you were talking about on the stream. Ready to grab one as soon as you finish it up.

  • 2018-05-29 at 20:55

    Looking forward to seeing this finished, gladly buy a few boards for the Genesises I’ve managed to hoard.

    Just installed an Arcade.TV RGB bypass board and MegaAMP, both work great but having two boards is a bit much for me.

  • 2018-07-15 at 11:15

    This is a very interesting development, thanks for sharing some details. I look forward to order some pcbs for my consoles.

  • 2018-12-14 at 07:51

    Hello, thanks for this! I hope this serves to correct all those MD2s with wrecked audio and video.

    If this mod is done in the MD1, is it preferred to fully remove the CXA1145P in the console, or it’s better to just cut the R,G,B and Sync legs?

    Thank you in advance.

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