OSSC Pro – Advice on outputting 800×600 to a CRT tv

[rpgwaiter]

Just got the OSSC Pro, and I have a CRT monitor that takes VGA input. The monitor only works with 800×600@60 signals, and will display an error screen with any other.

I’m getting a feel for the OSSC Pro UX, but I don’t really understand how to force this resolution out of HDMI. My goal is to use an HDMI->VGA converter that should support this resolution, at least until the extra AV out boards are back in stock.

Anyways, how exactly do I set the OSSC Pro to output at this resolution? I’m testing with a PS2 over component cables but I’d eventually like to try a variety of consoles on this CRT.

• This topic was modified 1 week, 6 days ago by rpgwaiter.

[BuckoA51]

That would be very unusual to have a CRT monitor that could only do 800×600, most computer BIOS etc screens were not in that resolution. Anyway, you can use scaler mode to fix the output resolution to whatever you want.

[rpgwaiter]

I figured that much. I can see a “PC 800x600_60” option under scaler opt -> adv. timing but I don’t see a way to actually enable that output

[BuckoA51]

Thats input timings. Scaler Opt->Scaler opt->DFP/CRT output mode lists available modes.

Really none of the available output modes work?

[rpgwaiter]

No, the CRT really does only accept 800×600@60 for some reason. It’s a gateway monitor for some special PC (that I don’t own). Not sure why it has this restriction.

 

Edit: I’m not opposed to adding the new resolution myself and compiling my own firmware but I wanna make sure there isn’t another option first. If I do end up going that route I’ll submit a PR on GitHub.

 

• This reply was modified 1 week, 5 days ago by rpgwaiter.

[marqs]

Is that truly a 38kHz capable tube? It looks like a standard 15kHz consumer CRT TV with maybe just a VGA card containing a TV encoder chip that downconverts 800×600 to SDTV. Anyway, you can repurpose any of the output presets (e.g. 1024x768_60) into 800x600_60 by just adjusting its timings (via Output opt -> Adv. disp timing) and then selecting it when using scaler mode.

[Zacabeb]

Those giant Gateway Destination monitors were sold as part of their short-lived attempt at making a PC the center of the living room. They reportedly have CRTs with coils for the 30-40 kHz range, so from what I understand they display 800×600@60 natively.

The little information available on them however suggests that they should handle most standard resolutions in that range, such as 640×480@60, but the model in question may be intentionally picky.

[rpgwaiter]

I did some testing with a Dreamcast with VGA out and turns out the front port on the monitor is fried. There’s one on the back too and that one works great

• This reply was modified 1 week, 2 days ago by rpgwaiter.

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