DCHDMI Versus 480p 'HD' Dreamcast Cables

As I'm sure you're aware by now, there are a range of 'HD' options now available for the Dreamcast. What it's important to note though, is that all of these so-called HD cables are not actually delivering a true high definition image. Yes, they use a HDMI connector that plugs into your display, but this image is 480p and is being drawn directly from the analogue VGA output of the Dreamcast. Regardless of what you've probably seen or read on some other websites, the various HD cables from Pound, Hyperkin, Beharbros etc., are not magically transforming Dreamcast games into high definition experiences. That's impossible.

Now, that's not to say that any of the devices from the aforementioned brands aren't worth your time. They totally are, with both the Pound and Beharbros options being perfectly acceptable ways of connecting a Dreamcast to a HD flat panel display with the minimum of fuss. The thing is, while the games still look fine using these cables and boxes, there is an alternative device that really does improve image quality immeasurably without the need for an external upscaler. That device is the internal DCHDMI mod from citrus3000psi and chriz2600; and we reviewed it recently here at The Dreamcast Junkyard.

One of the most important benefits over the 480p cables though, is that the DCHDMI is putting out the correct screen aspect ratio. See, the VGA signal the cables use only uses the inner 640x480 of the 720x480 frame. So the TV displays the the whole 720x480 in a 4:3 format. This basically squashes the entire image. All of the VGA to HDMI cables have this porblem, but the DCHDMI doesn't do this. There are both VGA and 480p options built in to the DCHDMI menu, and the 720p option because some homebrew titles use the extra 80 pixels.

What I've seen from some commenters though, is a desire to actually see some kind of comparison between what the 480p 'HD' cables offer, and what the DCHDMI in 1080p mode (960p windowed) is kicking out. The DCHDMI, it's worth noting again, is an internal board that also packs an FPGA and which is wired directly into the GPU of the Dreamcast. It's taking the digital image directly, and there is no analogue conversion, so naturally it will be doing things the HD Link and Gekko or Akura are not built to do. That's not the point of this article and video though. This is simply a comparison...and seeing is believing. Here you go:

It's probably worth viewing the video in the highest quality available to get the full effect, but the superiority of the internal mod is pretty clear. Naturally, the DCHDMI will be more of a faff (and markedly more expensive) than just plugging a cable in to your console, but it's good to know that the options are available.

You can pre-order the DCHDMI here, should you so desire. The Beharbros Gekko is available here, and the Pound HD Link is available here.

Related articles:

• Review: DCHDMI
• Review: Beharbros Akura
• Review: Beharbros Gekko
• Review: Pound HD Link
• Video: DCHDMI Full Speed Footage

DCHDMI: Full Speed Gameplay Footage

It became apparent after I uploaded the review of citrus3000psi and chriz2600's internal Dreamcast mod - the DCHDMI - that the footage included in the video was actually throttled to 25fps due to the introductory part of the video (the bit with my hands). Naturally, this caused quite the drama in the comments section on YouTube. And so, as a result of the ensuing cold sweats, night terrors and feeling like a total twunt; I decided to rectify said issues by recording a load of gameplay direct from the DCHDMI, eschewing an intro, and slapping the results on YouTube.

So here, for your enjoyment, is 18 minutes of pure gameplay. Recorded in 1080p mode (which is 960p windowed...which is itself 480p doubled by the FPGA on the board) at full speed 60 frames per second where applicable. I haven't altered anything, just recorded some gameplay from a range of titles. Here you go:

The full list of games in the video is:

• Ferrari F355 Challenge
• Sonic Adventure
• Shutokou Battle 2
• Dead or Alive 2
• Sturmwind
• Daytona USA 2001
• Virtua Striker 2
• Fatal Fury: Mark of the Wolves
• Le Mans 24hrs
• Quake III: Arena
• V-Rally 2: Expert Edition
• Virtua Tennis
• Crazy Taxi
• Marvel Vs Capcom 2
• Metropolis Street Racer
• Sega Rally 2
• Soul Calibur

I apologise for how shit I am in some of the footage but I'm sure you can see that the DCHDMI is pumping out some seriously sharp images. I'm anticipating that people will still complain in the comments section (on YouTube) about something...but hey. What can you do?

Read our full written review here, and find the DCHDMI modification for sale at citrus3000psi's dedicated web store here. It costs $150 and will be available from mid November 2018.

Will you be getting involved in the DCHDMI? If you'd like a closer look we'll be showing it off at Play Expo Blackpool at the end of October. Let us know in the comments, on Facebook or on Twitter. If you want to leave a negative comment on YouTube,  please feel free to join the other 367,000,000 people doing that daily. Cheers!

Hardware Review: DCHDMI - The 1080p Dreamcast

Playing older games in higher resolutions than they were ever intended to be played in is all the rage these days. Be it through emulation, or via the relatively recent trend of the remaster, getting titles of yesteryear to play on modern display screens in the best possible quality is a prize many are willing to go to extraordinary lengths to attain.

The Dreamcast CD player in 1080p (960p bordered)

Here in our little corner of the gaming sphere, things are no different. There are some people who will never plug their Dreamcasts into anything but a CRT television through an RGB SCART connection. Others champion the clarity of a good old fashioned CRT computer monitor and a VGA box. And for those who simply don't have the space for the luxury of a proper old television or monitor, there's the HDMI passthrough boxes from Beharbros and Pound Technology.

The Akura and Gekko are both well built, high quality devices

The limitations of these HMDI boxes and cables are well documented, but for those with either limited space or on a budget, simply connecting a Dreamcast to a flat panel HD display and enjoying their favourite games in 480p is a perfectly acceptable and affordable way to continue gaming on Sega's old warhorse in the modern era.

Of course, what the Pound and Berharbros adapters do is simply take the VGA signal from the Dreamcast and spit it out through a HDMI cable. There's no upscaling at all, and the larger the screen, the poorer the image. It isn't really true high definition gaming, in all honesty. Things are about to change though, as a new contender has entered the ring: DCHDMI.

The DCHDMI board is an internal mod replete with an onboard FPGA

The DCHDMI is an internal board that is slotted into the Dreamcast shell, beneath the main board and is connected directly to the Dreamcast's GPU. What this means is that a digital signal is taken directly from from the GPU and is output in true HDMI through a mini HDMI port on the back of the console. The results are truly staggering, and as we'll see in this review, outside of emulation, the image quality and clarity afforded by the DCHDMI is leagues ahead of anything ever seen before from a Dreamcast console...