Search found 148 matches

by JamesF
Tue Oct 22, 2019 9:45 am
Forum: MiSTer
Topic: MISTer (Main Core)
Replies: 293
Views: 53834

Re: MISTer (Main Core)

I have problem with custom resolution that used to work on older builds. video_mode=1920,48,32,80,1200,3,6,26,154128 When rebooting mister with this custom resolution I see static screen and OSD will not display. But using this 1080p custom resolution video_mode=1920,48,32,80,1080,3,5,23,138653 and ...
by JamesF
Sat Oct 19, 2019 7:37 pm
Forum: MiSTer
Topic: Gamma correction
Replies: 60
Views: 3706

Re: Gamma correction

Attached Polynomial Gamma with 2.3 to 3.0 cure below 50% input in 0.1 jumps, and above that is your native gamma.
Looks fantastic, please try.
by JamesF
Sun Oct 13, 2019 7:44 pm
Forum: MiSTer
Topic: LL COOL JOY - when...?
Replies: 5
Views: 503

Re: LL COOL JOY - when...?

I suggest BlissBox if you want low lag solution now, or wait for BlisSTer or LLOAD (link).
Note that all the above use LLAPI protocol which may or may not be officially integrated to MiSTer.
by JamesF
Sat Oct 12, 2019 7:18 am
Forum: MiSTer
Topic: composite video without moving color artifacts
Replies: 9
Views: 427

Re: composite video without moving color artifacts

The code you posted above has no any sync with pixel clock. Unlike external crystal, fpga generated clock doesn't change phase in relation to CSync. Thus the artifacts do not move/crawl,, that's the reason for this request. Big reason for ownning a IO board (and MiSTer in general) is the VGA port f...
by JamesF
Fri Oct 11, 2019 2:30 pm
Forum: MiSTer
Topic: composite video without moving color artifacts
Replies: 9
Views: 427

Re: composite video without moving color artifacts

Another thing to mention is this will not work with the VGA dongle with direct_video, since there is no way to pass the "Clock on Vsync" through this adapter.
by JamesF
Fri Oct 11, 2019 12:08 pm
Forum: MiSTer
Topic: composite video without moving color artifacts
Replies: 9
Views: 427

Re: composite video without moving color artifacts

I have this device from Antonio, and I can vouch that it looks great. The ADV724 is probably the best modern RGB->Video encoder, very useful for people who want to use the MiSTer with a CRT that does not have RGB or YPbPr inputs, for authentic console experience. Or even to build an arcade cabinet w...
by JamesF
Thu Oct 10, 2019 5:30 pm
Forum: MiSTer
Topic: MISTer (Main Core)
Replies: 293
Views: 53834

Re: MISTer (Main Core)

it was this: sys: back to inverted hdmi clock for better timings. in the Menu core. Before that everything was okay. Genesis core suffers from that too but not snes core. My monitor display 192 1 x1080,, I have to unplug the HDMI to fix this for all core. Maybe just revert the inverted hdmi clock ch...
by JamesF
Thu Oct 10, 2019 1:54 pm
Forum: MiSTer
Topic: MISTer (Main Core)
Replies: 293
Views: 53834

Re: MISTer (Main Core)

That's my TV and my computer monitor,, two devices.
Strangely that did not happen in previous builds.
by JamesF
Thu Oct 10, 2019 1:25 pm
Forum: MiSTer
Topic: MISTer (Main Core)
Replies: 293
Views: 53834

Re: MISTer (Main Core)

Sony HDTV KDL-46EX402 also does not produce image until I replug the HDMI cable.
by JamesF
Thu Oct 10, 2019 7:48 am
Forum: MiSTer
Topic: MISTer (Main Core)
Replies: 293
Views: 53834

Re: MISTer (Main Core)

I still have a small HDMI pixel shift when booting MiSTer. I have to unplug and replug the HDMI cable to fix this for all cores. A few interesting feature suggestions: * add clock to the info screen in cores * add temperature sensor of the fpga in the info screen. * add dualshock 4 battery meter to ...
by JamesF
Sun Oct 06, 2019 3:56 pm
Forum: MiSTer
Topic: Gamma correction
Replies: 60
Views: 3706

Re: Gamma correction

@paulbnl
Are you going to PR it so Sorgelig can review it?
by JamesF
Sat Oct 05, 2019 7:42 pm
Forum: MiSTer
Topic: Gamma correction
Replies: 60
Views: 3706

Re: Gamma correction

This is absolutely amazing. I hope to see this merged to main. Matlab script for Poly Gamma: in = 0:1:255; a = ((in/255) .^ 2.9); b = ((in/255) .^ 3.8); Out = 255 * ((2 * a - b) .^ (1/2.2)); Y = round(Out); Y1=Y(:) Script for normal Gamma: in = 0:1:255; Out = 255 * ((in/255) .^ 1.1); Y = round(Out);...
by JamesF
Fri Oct 04, 2019 7:08 pm
Forum: MiSTer
Topic: MISTer (Main Core)
Replies: 293
Views: 53834

Re: MISTer (Main Core)

My guess is some interaction with scrolling acceleration.
by JamesF
Fri Oct 04, 2019 4:49 pm
Forum: MiSTer
Topic: MISTer (Main Core)
Replies: 293
Views: 53834

Re: MISTer (Main Core)

@Sorgelig I report a strange behavior (can't call it bug). The cursor continue to scroll in menu list even after I release the down/up arrow... To recreate in Genesis core (for example), hold down arrow and wait till the cursor goes below the final option (Border:) then release the down button when...
by JamesF
Thu Oct 03, 2019 9:46 pm
Forum: MiSTer
Topic: Gamma correction
Replies: 60
Views: 3706

Re: Gamma correction

paulbnl wrote:I am going to make it like the scaling filters so we can just use txt files for the different curves.

Thank you.
by JamesF
Thu Oct 03, 2019 7:07 am
Forum: MiSTer
Topic: Gamma correction
Replies: 60
Views: 3706

Re: Gamma correction

By 'looks wrong' I mean the middle shades are much too dark compared to pure white,, pure white is used for text and plenty other things (clouds, eyes, etc..). That's the false effect of too high gamma value. To fix this abrupt transition we use polynomial gamma to gradualy return to 2.2 from around...
by JamesF
Tue Oct 01, 2019 11:57 am
Forum: MiSTer
Topic: Gamma correction
Replies: 60
Views: 3706

Re: Gamma correction

Yep, using DisplayCAL and MadVR for years now, vastly more accurate than all the other options. HCFR+MadVR for TV's, it's also freeware. Anyway, I hope paulb-nl can make that polynomial gamma curve work, as it is the 'right' way to do it (imo). From there, we can adjust the parameters to look even '...
by JamesF
Tue Oct 01, 2019 11:26 am
Forum: MiSTer
Topic: Gamma correction
Replies: 60
Views: 3706

Re: Gamma correction

Dell U2410 IPS with wide gamut CCFL backlight calibrated with i1 Display Pro in srgb color space, ICC in windows, 3DLUT in MadVR. 2002 Sony Trinitron KV-29FX30, also calibrated. Again, these 1.2-1.4 number which result in 2.64 to 3.08 gamma is a ridiculously wrong thing to do,, especially if it is b...
by JamesF
Tue Oct 01, 2019 10:46 am
Forum: MiSTer
Topic: Gamma correction
Replies: 60
Views: 3706

Re: Gamma correction

Yes, I know how gamma works, proper display calibration is one of my main hobbies. :) So I figured a polynomial gamma with 2.8 up to 0-30% input, and gradually returning to 2.2 above that should be good enough to 'reverse' the native sRGB curve of LCDs. The problematic part is that 0-30% input regio...
by JamesF
Tue Oct 01, 2019 6:43 am
Forum: MiSTer
Topic: Gamma correction
Replies: 60
Views: 3706

Re: Gamma correction

1.3 and 1.4 equals to a gamma (transfer function) of 2.86 and 3.08 which no display has/had, CRT or otherwise, regardless how good it looks to you. I think the problem here is most LCD displays start deviating from 2.2 for the black shades and become closer to a gamma of 1 (brighter) as the shades b...
by JamesF
Mon Sep 30, 2019 5:47 am
Forum: MiSTer
Topic: Gamma correction
Replies: 60
Views: 3706

Re: Gamma correction

It works. The jump from Off to 1.2 is too big, maybe add 1.1 instead of 1.4? 1.4 is much darker than any real display I've seen and I still believe that no gamma correction is needed on any properly calibrated display. If I understood gamma power calculation correctly (1.1*2.2=2.42), and typical gam...
by JamesF
Sun Sep 29, 2019 7:25 am
Forum: MiSTer
Topic: Gamma correction
Replies: 60
Views: 3706

Re: Gamma correction

CRT gamma ranged from 2.1 to 2.5, depending on where you set your 'brightness' control. A well behaving studio CRT is standard 2.2 with clearly visible black shades, just like well behaved IPS LCD panel. Those 'gamma corrected' images in the first post are way too dark, actually, my sony trinitron l...
by JamesF
Sat Aug 31, 2019 8:52 am
Forum: MiSTer
Topic: Original analog video without I/O board? Possible!
Replies: 115
Views: 13149

Re: Original analog video without I/O board? Possible!

Thank you paulbnl, it works great! @Sorgelig Seems like the SOG resistor+diode injection of csync to the Y (luma), it signal pulls is slightly below 0v so the black shades are clipped when using the VGA adapter with this resistor+diode SOG mod. The IO boards has a buffer transistor for SOG and does ...
by JamesF
Fri Aug 30, 2019 5:30 am
Forum: MiSTer
Topic: Original analog video without I/O board? Possible!
Replies: 115
Views: 13149

Re: Original analog video without I/O board? Possible!

They are all equally miss. :lol: Yes, using limited range fixes blacks, but whites do not reach 0.7v as they should like paulb-nl said. There is a 4.7k resistor on pin 35 of the AG6200 that is responsible for RGB swing, this resistor can (should) be lowered to add gain to RGB output to fix that issue.
by JamesF
Tue Aug 27, 2019 5:38 pm
Forum: MiSTer
Topic: Original analog video without I/O board? Possible!
Replies: 115
Views: 13149

Re: Original analog video without I/O board? Possible!

Any HDMI device that does not support Full Range RGB is not compliant to the HDMI specification so that is a defect. Correct. Luckily the ADV7513 color space conversion matrices are high bitdepth so there is no truncation artifacts. From ADV7513 hardware user guide - Color Space Conversion (CSC) Ma...

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