Search found 35 matches

by d909
Tue Jan 09, 2024 9:23 pm
Forum: Other Computer / System Cores
Topic: Groovy_MiSTer Core
Replies: 259
Views: 41393

Re: Groovy_MiSTer Core

In theory, a set up like this should be able to provide lower than native input lag due to runahead, but my brief testing with Retroarch is not showing such an improvement. It seems like the two extra frames of vsync lag are still there even though vsync is off. I'm showing still roughly 2 frames of lag in super mario world on bsnes on the CRT conn...
by d909
Wed Sep 06, 2023 5:04 am
Forum: Hardware Setups
Topic: MiSTer Inside a Sony PVM-14L5
Replies: 8
Views: 4985

Re: MiSTer Inside a Sony PVM-14L5

The PVM obviously does accept video input through the option slot. That's what the slot is for. Theoretically, it should be possible to design a board that can interface with the slot and send RGB video directly into the PVM instead of requiring an external cable to one of the other inputs?

I would definitely buy such a board if someone made one.

by d909
Wed Sep 06, 2023 4:55 am
Forum: Display Devices
Topic: MiSTer not working with BVM CRT
Replies: 33
Views: 5644

Re: MiSTer not working with BVM CRT

Can you really send composite sync over hdmi? I thought the composite_sync option on MiSTer was only for the analog I/O board. I'd assume your external DAC is generating normal VGA H+V sync regardless of that setting. So I'm actually surprised you get a usable signal with the HD Fury at all, unless it's just generating some kind of csync itself. If...
by d909
Wed Sep 06, 2023 4:39 am
Forum: General Discussions
Topic: Why Are So Many Cores Missing Horizontal & Vertical Position Settings for CRTs?
Replies: 16
Views: 5349

Re: Why Are So Many Cores Missing Horizontal & Vertical Position Settings for CRTs?

I've never been able to find anything that does size properly, but the RGB 203rxi does h and v position well. Provided you aren't using an interlaced signal.

by d909
Fri Apr 21, 2023 6:50 pm
Forum: Display Devices
Topic: Amiga/Microvitec 1438S Multisync as the Only Monitor on The MiSTer?
Replies: 8
Views: 1864

Re: Amiga/Microvitec 1438S Multisync as the Only Monitor on The MiSTer?

One thing to keep in mind is that ao486 doesn't output real VGA signals. Everything goes through the scaler and digitally scales to a fixed output resolution. A clunky workaround exists. I think there's a guide somewhere on this forum.

by d909
Fri Apr 21, 2023 6:47 pm
Forum: Display Devices
Topic: Amiga/Microvitec 1438S Multisync as the Only Monitor on The MiSTer?
Replies: 8
Views: 1864

Re: Amiga/Microvitec 1438S Multisync as the Only Monitor on The MiSTer?

Yes, in theory that should work. I've got one of those Microvitec multisync monitors (though mine is in pretty terrible shape) and it can sync to almost everything the mister does. I haven't tried using it in a couple years now, though.

I wish those monitors weren't so impossibly rare.

by d909
Thu Feb 02, 2023 11:03 pm
Forum: SNES (Super Nintendo Entertainment System)
Topic: Save State Support
Replies: 23
Views: 18031

Re: Save State Support

The FXPAK Pro flash cart has this now: https://sd2snes.de/blog/archives/1261
I wonder if any of the lessons learned in that project can be applied here.

by d909
Sat Jul 09, 2022 11:56 pm
Forum: Sony PlayStation (PSX)
Topic: Flicker Changing Resolutions on a CRT (Solved)
Replies: 3
Views: 1012

Re: Flicker Changing Resolutions on a CRT (Solved)

Correct me if I'm wrong but I think vsync_adjust should not affect image of the analog board when vga_scaler is 0 This was my understanding as well, but I tried with it on and with it off and there was indeed a difference. You don't get any delay on VGA out when setting vsync adjust to 0, it's just for HDMI/scaler. There is currently a situation w...
by d909
Fri Jul 08, 2022 9:23 pm
Forum: Sony PlayStation (PSX)
Topic: Flicker Changing Resolutions on a CRT (Solved)
Replies: 3
Views: 1012

Flicker Changing Resolutions on a CRT (Solved)

I'm experiencing a brief flicker when the resolution changes, even though I'm using VGA -> CRT. The flicker goes away if I set vsync_adjust to 0, but trading a flicker for an extra frame of lag is hardly ideal. vga_scaler is set to 0. A simple way to replicate it is opening and closing the menu in Final Fantasy VII. My real PS2 has no flicker in th...
by d909
Mon May 02, 2022 10:22 pm
Forum: Hardware Setups
Topic: MiSTer Multisystem Handheld Prototype 'Handy'
Replies: 43
Views: 10458

Re: MiSTer Multisystem Handheld Prototype 'Handy'

You will sell more of these than you can possibly hope to make.
by d909
Thu Oct 14, 2021 2:06 am
Forum: Display Devices
Topic: Vga splitter: how?
Replies: 10
Views: 2703

Re: Vga splitter: how?

My Extron Crosspoint switch works flawlessly with zero quality loss that I can see. They're very powerful and useful analog video switches. They're not actually VGA though - they're BNC - but VGA to BNC cables work great. They can route any combination of inputs to any combination of outputs. You can even loop one of the outputs through a processor...
by d909
Wed Jul 28, 2021 11:40 pm
Forum: Hardware Setups
Topic: MiSTer Multisystem - All-in-One System
Replies: 362
Views: 528067

Re: MiSTer Multisystem - All-in-One System

So close to perfect.
But I sure do wish it had composite and/or svideo. Us Americans never had RGB back in the day, and all our old CRT tvs use composite.
by d909
Tue May 25, 2021 3:53 pm
Forum: Other Computer / System Cores
Topic: TI-994a How-To
Replies: 365
Views: 192989

Re: TI-994a How-To

Someone released a new game for the TI-994a just a few months ago, and as far as I can tell its easily the most sophisticated game to ever release for the hardware. https://store.steampowered.com/app/1539 ... red_Crown/

Of course, the MiSTer core lacks features necessary to make it run.
by d909
Thu May 20, 2021 5:57 am
Forum: Input Devices
Topic: Better support for SNAC?
Replies: 31
Views: 20557

Re: Better support for SNAC?

With the very fastest usb controllers, USB is going to have about a millisecond extra latency over SNAC on average, resulting in one extra frame of input lag about 5% of the time. (Source: https://docs.google.com/spreadsheets/d/1KlRObr3Be4zLch7Zyqg6qCJzGuhyGmXaOIUrpfncXIM/edit#gid=0) Is anyone ever going to notice this? Nope. Nevertheless, I person...
by d909
Sun May 09, 2021 7:40 am
Forum: General Discussions
Topic: MiSTer FPGA Community Survey. Please share how you use your MiSTer.
Replies: 14
Views: 4665

Re: MiSTer FPGA Community Survey. Please share how you use your MiSTer.

But original systems were used with wired controllers and nowadays many people want use wireless controllers. In this case higher input lag must be accepted. Yes, and hdmi monitors / tvs also add unavoidable input lag. In the end, what is acceptable depends on the user's preferences. For me, the answer is original system latency plus zero. It's a ...
by d909
Sun May 09, 2021 5:30 am
Forum: General Discussions
Topic: Ability to Reposition Screen (X,Y) on Cores
Replies: 9
Views: 4105

Re: Ability to Reposition Screen (X,Y) on Cores

An expensive workaround would be an extron RGB device, as they tend to have horizontal shift knobs. I recommend the 109xi or 203rxi.
by d909
Sun May 09, 2021 5:09 am
Forum: General Discussions
Topic: MiSTer FPGA Community Survey. Please share how you use your MiSTer.
Replies: 14
Views: 4665

Re: MiSTer FPGA Community Survey. Please share how you use your MiSTer.

That input lag question should be how much ADDED input lag is acceptable. In this survey, you ask what the maximum acceptable input lag is, but that question is really complicated. On real hardware, the input lag isn't zero. It varies based on the game and system but is often one to two frames, usually resulting in roughly 17-62 milliseconds of lag...
by d909
Mon Feb 01, 2021 8:51 pm
Forum: Display Devices
Topic: Custom Video Modes Test Thread
Replies: 89
Views: 52251

Re: Custom Video Modes Test Thread

This video mode is the best I've found so far for displaying the menu with a VGA scaler. Very useful for anyone wanting to run scripts without HDMI, or who just want a wallpaper on CRT. [Menu] video_mode=512,42,62,64,224,11,21,6,10689 vga_scaler=1 The 512x224 resolution gets the menu aspect ratio very close to where it is without VGA scaler on, an...
by d909
Fri Oct 09, 2020 11:21 pm
Forum: General Discussions
Topic: Composite Adapter for MiSTer
Replies: 64
Views: 28284

Re: Composite Adapter for MiSTer

dshadoff wrote: Fri Oct 09, 2020 11:15 pm My point being, however, that you might want to play PC Engine games using the "RGB" colours instead of the "original" colors - if the adapter does a RGB-YUV transformation. We encoded a RGB-YUV-RGB transformation into the core for "original".
Oh, interesting. I see.
by d909
Fri Oct 09, 2020 11:09 pm
Forum: General Discussions
Topic: Composite Adapter for MiSTer
Replies: 64
Views: 28284

Re: Composite Adapter for MiSTer

Those are very interesting. Especially the different shades of greens on Duck Tales (not as NTSC artifacts, but as areas of flat colour). Reminds me of what we saw as differences between RGB and YUV output from the 6260 on PC Engine over the past several months (as the new palette was developed). Does the composite adapter use RGB as input or YUV ...
by d909
Fri Oct 09, 2020 11:06 pm
Forum: General Discussions
Topic: Composite Adapter for MiSTer
Replies: 64
Views: 28284

Re: Composite Adapter for MiSTer

Those are very interesting. Especially the different shades of greens on Duck Tales (not as NTSC artifacts, but as areas of flat colour). Reminds me of what we saw as differences between RGB and YUV output from the 6260 on PC Engine over the past several months (as the new palette was developed). Does the composite adapter use RGB as input or YUV ...
by d909
Fri Oct 09, 2020 10:17 pm
Forum: General Discussions
Topic: Composite Adapter for MiSTer
Replies: 64
Views: 28284

Re: Composite Adapter for MiSTer

Antonio's adapter is pretty good. It's actually better than my real NES's composite output, though as described in this thread, there IS a small amount of moving dot crawl. The artifacts on a real NES sit still but are much more visible. Thanks for the screenshots! Just curious, have you noticed any differences in some of the textures that game de...
by d909
Fri Oct 09, 2020 8:40 pm
Forum: General Discussions
Topic: Composite Adapter for MiSTer
Replies: 64
Views: 28284

Re: Composite Adapter for MiSTer

Antonio's adapter is pretty good. It's actually better than my real NES's composite output, though as described in this thread, there IS a small amount of moving dot crawl. The artifacts on a real NES sit still but are much more visible. Real NES: real nes.jpeg ----- Antonio's adapter: antonio adapter.jpeg There is moving dot crawl in the above ima...
by d909
Wed Sep 30, 2020 8:11 pm
Forum: PC 486SX (ao486)
Topic: AO486 and Sony 20L5 (mulitformat)
Replies: 5
Views: 3544

Re: AO486 and Sony 20L5 (mulitformat)

Probably, but you'll probably get significant scaling artifacts and a little stutter too.
by d909
Tue Sep 29, 2020 10:20 pm
Forum: PC 486SX (ao486)
Topic: AO486 and Sony 20L5 (mulitformat)
Replies: 5
Views: 3544

Re: AO486 and Sony 20L5 (mulitformat)

SuperBabyHix wrote: Tue Sep 29, 2020 3:14 pm 400p@70hz signal
This is exactly the reason it doesn't work.

As for 640x480x60 from a modern PC, you can make that work perfectly on an L5. Might have to mess with some service menu settings - probably CLP P DLY?
by d909
Tue Sep 15, 2020 8:15 pm
Forum: PC 486SX (ao486)
Topic: VGA Output, Scalers, and CRTs
Replies: 74
Views: 41423

Re: VGA Output, Scalers, and CRTs

So I tried the 4x mode and set vsync to 60 instead of variable and now DOS games do work unscaled. Windows 3.1 however is still broken like this. Oh, it never occurred to me to mess with that setting. I set it to variable, and it still works for me. But now at 31khz / 70hz, where its supposed to be! This seems to have largely if not entirely fixed...
by d909
Tue Sep 15, 2020 8:09 pm
Forum: PC 486SX (ao486)
Topic: VGA Output, Scalers, and CRTs
Replies: 74
Views: 41423

Re: VGA Output, Scalers, and CRTs

IMG_0119.jpeg
IMG_0119.jpeg (4.17 MiB) Viewed 11249 times
This is running in DOS 6.22.
by d909
Tue Sep 15, 2020 7:46 pm
Forum: PC 486SX (ao486)
Topic: VGA Output, Scalers, and CRTs
Replies: 74
Views: 41423

Re: VGA Output, Scalers, and CRTs

It seems worth noting that when I try to run win 95 in 256 or higher color mode, the corruption I get, which is vaguely similar to yours, only appears from the VGA port and not through the scaled HDMI... Similar to what you describe. So I guess definitely try win 95?

Edit: I tried DOS 6.22. Games still work. Guess that isn't it.
by d909
Tue Sep 15, 2020 7:43 pm
Forum: PC 486SX (ao486)
Topic: VGA Output, Scalers, and CRTs
Replies: 74
Views: 41423

Re: VGA Output, Scalers, and CRTs

I am running Windows 95 - in other words, DOS 7.0. I did not install any video drivers. It doesn't seem likely that dos 7 vs 6.22 would be the problem, but it is a difference worth investigating perhaps? I know those Amiga monitors can do 15khz and 31khz, but are you absolutely certain they do 27khz? I have a couple sony pro monitors that also do 1...
by d909
Tue Sep 15, 2020 7:10 pm
Forum: PC 486SX (ao486)
Topic: VGA Output, Scalers, and CRTs
Replies: 74
Views: 41423

Re: VGA Output, Scalers, and CRTs

Video_mode is the scaled resolution though. When vga_scaler is 0 that video mode is bypassed and the core is displaying a raw video signal. I have all the same settings except forced scandoubler which I've tried with and without and it makes no difference. You can boot up in DOS terminal just fine like that screenshot shows, but as soon as Windows...