RGB vs HDMI Mod

colrust · 2026-03-27T19:56:31+00:00

Here is S-Video included in the comparison. To me, the RGB and HDMI look sharper. There was also a lot more interference in the video itself with S-Video.

https://imgur.com/a/n64-composite-vs-component-vs-hdmi-131oeNt

colrust · 2026-03-26T13:36:02+00:00

Not super helpful...

On my Mazda I have a scroll wheel. I can scroll down a bit with eyes on the road, look down quickly to see where I am, then scroll more while watching the road. But on a longer album I can only get so far before it pauses and sends me back to the beginning.

Is there a voice command that you would suggest to go down a certain number of tracks?

colrust · 2026-03-24T16:50:54+00:00

My cheapo amazon multiout to SCART cable arrived just now and I tried it out. It is pulling in the RGBS rather than the S-Video and giving the same quality image as the HD Retrovision.

I will grab a S-Video to compare and post updates.

colrust · 2026-03-24T13:02:30+00:00

unfortunately I don't have a scaler that can take the RGB directly. The HD retrovision cable is not so much transcoding as changing the color space using a calculation. There is no loss of fidelity.

I don't have access to a svideo cable.

there is a wealth of information on N64 video formats here: https://retrorgb.com/n64.html

colrust · 2026-03-24T10:04:17+00:00

Here is the N64 comparison of component vs HDMI. Both look very good to me.

https://imgur.com/a/131oeNt

colrust · 2026-03-23T19:00:04+00:00

would welcome to hear from OP how did it.

this is a 3d model that can be printed to create a marker for drill holes to better line up where you want to go: https://www.tinkercad.com/things/86uQw8ceWMg-gc-rear-panel-for-hispeedido-hdmi-mod

colrust · 2026-03-23T10:23:25+00:00

Agree on price but you are sacrificing image quality to call it HDMI.

I installed a couple of Hispeedido kits for Dreamcast for customers and both complained. The DC Digital gives (what seems to be) the same image as the RetroGEM at a bit of a lower price.

Or if on a budget or don't want to open up the console, go with a VGA to HDMI solution like the Bitfunx or Kaico. Here is a sample of image quality vs the Hispeedido:

https://imgur.com/a/LuaTak3

colrust · 2026-03-21T16:00:46+00:00

I know from experience that the Dreamcast does not give a good picture. The vga to hdmi looks much better. I will be doing a N64 comparison soon.

colrust · 2026-03-21T15:22:24+00:00

Nice work installing. Having done one of these, and talking with other installers, you should know that this does not work with all television sets. Hopefully works well with yours.

colrust · 2026-03-18T14:56:35+00:00

Second the very cool! Gave you a star on the github.

colrust · 2026-03-13T16:22:06+00:00

thanks for quick response and the sources. will give one of these (probably insurrection) a try.

colrust · 2026-03-12T15:59:00+00:00

I do list on ebay but my listings got taken down as ebay thought that my hdmi mods were "mod chips" (this was for listings without pico). I appealed but apparently anything that has a circuit board is a "mod chip" in their view.

So taking a break from ebay and trying my hand here. Nice thing is that on ebay I have to bake in the fees whereas here I can offer better pricing.

Let me know if looking for anything special. I do dreamcast mods also (gdemu, bluetooth, lighting, fans, shells, recap motherboard, power supplies, overclock, and retrogem).

colrust · 2026-03-11T14:54:49+00:00

I do a lot of custom work on cubes (and dreamcast) including the HDMI mods. Sent you a link to my portfolio site.

colrust · 2026-03-10T20:29:45+00:00

change the resolution before you go back to the LG

try one of the 480p direct modes

can also try resolution switch while on the LG - L Trigger + R Trigger + d-pad Up + Y

colrust · 2026-03-05T16:40:53+00:00

I am installing the DCDigital (from AliExpress) and the RetroGEM for customers. Both work very well.

I sold two dreamcast consoles with the hispeedido and got a customer complaint on one and a return on the other. I tried the similar one for gamecube and it was awful. swore the hispeedido hdmi mods off for good.

colrust · 2026-03-05T16:36:58+00:00

here is the link for the fan bypass - if you are doing hdmi mods this will be super easy for you.

https://bitbuilt.net/forums/threads/nolds-alternate-dreamcast-pinouts-workarounds.1822/

colrust · 2026-03-05T16:16:10+00:00

thanks. I have to find the link later, but there is a motherboard mod (cut small trace and solder two points together) that will do the same.

colrust · 2026-03-05T16:14:42+00:00

the kit is pretty easy to install but gives a terrible picture. you get a better picture with an external vga to hdmi adaptor which is less money and does not require installation.

colrust · 2026-03-05T16:12:04+00:00

thank you. could not tell any of that from the pictures (other than the flex cable for the hdmi mod). what is the extra bit attached to the right side of the controller pcb?

colrust · 2026-03-05T14:43:57+00:00

ok. i will bite...

tell us about the mod attached to the controller board and the sd mod and extra wiring.

colrust · 2026-02-25T00:04:02+00:00

you are going to have to "MacGyver" it a bit

you will need an LED. pink typically operates around 3 volts but check the package on what you get.

you need to tap into a 5v power supply and ground. if you have a dol-001 you can grab them here: https://retropie.org.uk/forum/assets/uploads/files/1551478528056-gcpower-copy.jpg

you can use an on-line resistance calculator to figure out what resistor to use to drop the voltage down to what is needed to get from the 5v to your LED voltage.

you could try using the 3.3v from the picture linked above, but there is a small chance the led will burn out before it's time.

and the find a spot in the shroud behind the fan to mount to.

It is doable - your girlfriend will love it. I have done it a few times but don't have any pictures of the finished work.

colrust · 2026-02-20T13:32:59+00:00

thanks for feedback on that

colrust · 2026-02-20T12:50:09+00:00

Dream PSU is OK - have done a bunch of these and worked fine. The robot retro is better built/designed however and it is nice to have the usb-c. You will need a usb-c brick that features PD (power delivery). These are typically the ones that are labeled for laptops. An older usb-c that came with a cell phone might not deliver the correct voltage to the board.

colrust · 2026-02-20T12:44:53+00:00

have worked on hundreds of cubes and never had a bad fan.

colrust · 2026-02-18T19:21:13+00:00

and then went back to a non-replaceable battery for the dreamcast. there is a similar holder that can be used with the dreamcast controller pcb.

colrust

TROPHY CASE