Repurpose Sega Master System RGB upscaler to MSX

ページ 3/3
1 | 2 |

By sdsnatcher73

Prophet (2337)

sdsnatcher73 さんの画像

05-06-2020, 11:04

Yeah I have DVI-D but the OSSC in HDMI mode does not work on the screen but in DVI mode it does... that’s why I wonder about the RAD-X...

By Meits

Scribe (6458)

Meits さんの画像

05-06-2020, 11:55

Weird, cuz at the job i learned DVI-D is just HDMI without audio. That's why cheap passive converters can exist.
So there are subtile differences. Or the OSSC senses the difference. DVI(-D) has more pins, so OSSC could possibly read what's at the other end of the cable... (just speculating)

By wbahnassi

Master (147)

wbahnassi さんの画像

08-06-2020, 19:04

So they removed the TurboEngine cable entirely Sad
A new batch of Rad2x cables were made available today, and the entire website crumbled down due to everyone barging in, causing the DOS handler of the web host to bring down the whole thing. It was quite a scene LOL!
Long story short, I placed an order for a random Rad2x cable and noted in the order details my custom request for the MSX connector and wiring. But I'm not putting high hopes on this, since the guy will be overwhelmed with orders and I doubt he'd want to spend any additional brain cycles on fulfilling my order. So he will either cancel it or ship it as-is, in which case I'll probably gut the thing and do the wiring myself...

So, stay tuned.. probably will have something in a couple of weeks if I'm optimistic Big smile

By wbahnassi

Master (147)

wbahnassi さんの画像

11-06-2020, 18:15

As I expected, the transaction got refunded. Guess next time don't ask for custom instructions. Too bad all is out of stock now so even if I wanted to go for the unmodified TurboEngine cable it's not possible.

Oh well...

By wbahnassi

Master (147)

wbahnassi さんの画像

04-10-2020, 02:12

Finally managed to get a Rad2X for the TurboGrafx. Yay! The actual device is not as tiny as I thought it is from the pictures, but it's still small. I made a rewire din cable that has male-female heads, which allows me to avoid ruining the perfectly-built Rad2X but still connect it properly to the MSX.

So, first attempt using my rewire cable.... nothing. The rad2x didn't even power up. What a let down. None of the RGB connector outputs seem to be able to give it the 5+V that rad2x requires.

So I tried to take 5+V from the joystick port, and the rad2x lit up! Of course that would be quite a funny connection, but at least now I can test the thing and see the quality.
The rad2x has some quirks. You have to power it up AFTER turning on the MSX, otherwise it will not detect any signal, and fallback to assume a composite input signal (yellow light indicator). If you turn the MSX afterwards, the rad2x won't recognize the RGB signal and switch to RGB mode automatically. You have to switch the device off/on to get it to see RGB input from the moment it turns on.. then all is good. When rad2x detects an RGB signal it gives a magenta indicator light.

Quality-wise, it's a line doubler, so same quality as the OSSC in Line2X mode. Of course it can't beat OSSC Line5X Smile
It has an additional toggle that enables a Super2xSAI-like upscaling filter.. Not very nice for MSX, but makes some games look interesting Smile

Now, the rad2x also has an input USB port. This is used to power the device on consoles that can't provide 5+V through the RGB connector (like the Playstation1). Since this particular rad2x was made for TurboGrafx, then the port was left blocked by a plastic cover. I removed the cover and powered the unit through USB, and it works fine too, so no need for nasty joystick connections. But I would appreciate it if anyone can suggest a way to make my MSX RGB connector's claimed 5+V power up the rad2x. For reference, my MSX is the AX370.

Cheers

By wbahnassi

Master (147)

wbahnassi さんの画像

04-10-2020, 06:06

Also I tried on AX350 and the same thing. RGB 5V pin didn't juice up the rad2x. Now pardon my ignorance, but according to our wiki, we have Slow Switch and Fast Switch pins that provide 5V and even 12V on some machines. What is this slow/fast switch functionality? I don't have an osciloscope to see the signal behavior, but at least I was able to measure 5V using a multimeter on those pins.

By Pencioner

Scribe (1480)

Pencioner さんの画像

04-10-2020, 10:43

Maybe it just can't provide enough current to power up the device? since those fast/slow switches are only used to provide means for SCART connection to detect the presence of RGB signal so monitor can switch to it automatically

ページ 3/3
1 | 2 |