MiSTer FPGA Forum

Posted: **Wed Jul 20, 2022 12:46 pm**

Discussion for the ipad retina display board controller.

If you have one please test it for some conditions and report.
This will help other users to decide what version to buy and where to get.

What's the version of the installed Realtek processor? If possible post a picture of it. Link to the seller is good too.
If board is from LaserBear, It's running the latest firmware?

Board have dual hdmi or hdmi/vga?

Check if it loses sync with low latency and native resolution (2048x1536@60)

Code: Select all

vsync_adjust=2
video_mode=13

Check if it supports 50Hz. (PAL mode)
Check if it supports 480p signal. (640x480 resolution)

dvi_mode is enabled or disabled?
If using LaserBear's firmware, is vrr_mode enabled?

Some boards have a hidden info screen.
To show it: Press and hold MENU when you turn on the screen.

Warning: Flashing a firmware to the board is dangerous and can brick your device

RTDTool with the GFXI2C interface driver

Let us know if you had success flashing your board and the method used.

Posted: **Wed Jul 20, 2022 12:54 pm**

I "bricked" my board by flashing a wrong firmware.
Before flashing it was detected on windows and the RTDTool could connect via GFXI2C interface driver.
After flashing with the wrong firmware the board won't even power up. Windows won't detect a device and so RTDTool can't connect to it.

I'm doomed!
But I think it's still possible to fix the board.

With the RTD266xFlash tool I can connect to the board and read it's firmware. Writing does not work at least for my board

Posted: **Fri Jul 22, 2022 9:57 am**

sonik wrote: ↑Wed Jul 20, 2022 12:54 pm I "bricked" my board by flashing a wrong firmware.
Before flashing it was detected on windows and the RTDTool could connect via GFXI2C interface driver.
After flashing with the wrong firmware the board won't even power up. Windows won't detect a device and so RTDTool can't connect to it.

I'm doomed!
But I think it's still possible to fix the board.

With the RTD266xFlash tool I can connect to the board and read it's firmware. Writing does not work at least for my board

Try a different HDMI cable, you may need to resort to either using the tool via the RaspberryPi Python method which seems to be more tolerant of the I2S interface than Windows is, or use one of the actual programmer boards. I found writing directly from Windows to be very patchy.

Posted: **Fri Jul 22, 2022 10:05 am**

I've got a DIY'd Laserbear setup (sourced the case from LB, the other pieces from various sources). The controller board looks identical to the LB one although it has the RTD2556 chip on it, not the RTD2556T, which means even after flashing LBs current firmware, I don't get Aspect Ratio control, or rotation, neither of which particularly worry me. In reality the only functional difference between the LB firmware and what it arrived with looks to be the LB logo.

I also don't get 480p support, at all, or VRR as far as I can tell. I've asked Greg @ LB about this and he's come across the same thing and is apparently looking into it.

I've got another screen with a different RTD2556 board (the version with 2 miniHDMI inputs as linked to in the original thread here) and it _does_ support 480p, although it has a totally different (much more basic) firmware UI. If I try flashing the LB firmware to this unit, it bricks it, flashing the stock firmware back again resurrects it.

Posted: **Fri Jul 22, 2022 12:42 pm**

KnightNZ wrote: ↑Fri Jul 22, 2022 9:57 am Try a different HDMI cable, you may need to resort to either using the tool via the RaspberryPi Python method which seems to be more tolerant of the I2S interface than Windows is, or use one of the actual programmer boards. I found writing directly from Windows to be very patchy.

Tested with the RaspberryPi and also with an Arduino. With both I could read the firmware but not write it back.
I only tested with a single hdmi cable. I will try again with other cables.

A friend of mine does have a board with a very different firmware.
His board is vga/hdmi and does support 480p. It still looses sync with vsync_adjust=2 but happens way less than on my board.

Posted: **Thu Jul 28, 2022 11:05 am**

I have a 2xminiHDMI board with no VGA port. Menu+power says: RTD with no other number after it.

Despite what is written on screen, inside i found a SAMSUNG LTN097QL01 lcd panel and not a LG LP097QX1. Tech specs seems to be the same, just different manufacturer.

To change language from default (chinese) i had to press:

Menu down down down
Menu Menu
Down down down menu (english)

PAL games in EU region works like a charm (50Hz).

I used a short good-quality HDMI cable, not the included one (it always gave me black screen).

Posted: **Thu Jul 28, 2022 2:17 pm**

asper wrote: ↑Thu Jul 28, 2022 11:05 am Can you explain me how to check 50hz support?

Set a core to PAL (EUROPE) and run a PAL game.
Can be done in most console cores.
Check mister's OSD for the current resolution and refresh rate.

IE: Load Genesis core.
On it's menu, set:
AUTO REGION: DISABLED
REGION: EU

Load an EUROPE game.

Posted: **Thu Jul 28, 2022 3:10 pm**

sonik wrote: ↑Thu Jul 28, 2022 2:17 pm
asper wrote: ↑Thu Jul 28, 2022 11:05 am Can you explain me how to check 50hz support?
Set a core to PAL (EUROPE) and run a PAL game.
Can be done in most console cores.
Check mister's OSD for the current resolution and refresh rate.

IE: Load Genesis core.
On it's menu, set:
AUTO REGION: DISABLED
REGION: EU

Load an EUROPE game.

Thank you! Any special .ini setting to be tested ?

Posted: **Thu Jul 28, 2022 5:03 pm**

For PAL 50hz I don't think you need to change any ini setting.

But you can check out native resolution low latency mode also as an added test.
Test some cores (at ntsc 60hz) and see if the screen blanks out/looses sync. O mine most of the jotego cores blanks out. Like CPS1 and CPS2.
vsync_adjust=2
video_mode=13

Posted: **Thu Jul 28, 2022 7:11 pm**

PAL games in EU region works like a charm.

About cps I tested cadillac and dinosaurs without any settings change. Is there a way to Force 60hz on cps games? Sorry to ask but... where should I add those vsync_adjust and video_mode ?

FYI: i trashed the hdmi cable included inside the lcd box and replaced it with a short High quality one, i had always black screen with the included cable.

Posted: **Thu Jul 28, 2022 8:15 pm**

Thanks for testing 50hz mode. Please can edit your first post above (the one with the pictures) and add this info over there too?

Those settings are on mister.ini file

CPS games are in 60hz mode. O don't think it's possible to change.

Posted: **Fri Jul 29, 2022 5:03 am**

sonik wrote: ↑Thu Jul 28, 2022 8:15 pm Thanks for testing 50hz mode. Please can edit your first post above (the one with the pictures) and add this info over there too?

Those settings are on mister.ini file

CPS games are in 60hz mode. O don't think it's possible to change.

Done. I will test cps games with the above settings change as sono as I can. Should i just edit those value, start the game and see if I have screen issues?

Posted: **Fri Jul 29, 2022 11:46 am**

asper wrote: ↑Fri Jul 29, 2022 5:03 am Done. I will test cps games with the above settings change as sono as I can. Should i just edit those value, start the game and see if I have screen issues?

Yeap!
This would be the best settings for this screen. Native screen resolution and low latency mode.
Keep in mind that the low latency mode currently have a negative effect the PSX core.

Posted: **Fri Jul 29, 2022 2:42 pm**

sonik wrote: ↑Fri Jul 29, 2022 11:46 am
asper wrote: ↑Fri Jul 29, 2022 5:03 am Done. I will test cps games with the above settings change as sono as I can. Should i just edit those value, start the game and see if I have screen issues?
Yeap!
This would be the best settings for this screen. Native screen resolution and low latency mode.
Keep in mind that the low latency mode currently have a negative effect the PSX core.

It seems to work like a charm !

: xgnZM3H.jpg (277.49 KiB) Viewed 8145 times

: dC149Qm.jpg (283.1 KiB) Viewed 8145 times

My previous values were:
vsync_adjust=0
video_mode=2

I also tested the PSX core with crash bandicoot (usa):

: l7sp5me.jpg (115.53 KiB) Viewed 8144 times

: PJc7b7p.jpg (187.92 KiB) Viewed 8144 times

: 64nJHV5.jpg (296.33 KiB) Viewed 8144 times

but I cannot see issues (anyway no deep test done).

For reference:
vsync_adjust explanation: https://mister-devel.github.io/MkDocs_M ... o-settings
video_mode explanation: https://mister-devel.github.io/MkDocs_M ... ideomodes/

Posted: **Mon Aug 01, 2022 1:07 pm**

Nice! Thanks for testing.
vsync_adjust=2 is known for making the core crash on some games with a lot of screen resolution changes. But it might have been fixed in the latest version

Posted: **Mon Jan 09, 2023 6:29 am**

when I use video_mode 13 and vsync_mode 2. The screen keeps losing signal and regaining it. Do I need a different HDMI cable?
video_mode 12 and vsync_mode 0 works fine, even at 50hz.
I have 2x mini hdmi

seems like it only happens on same cores like cps2 and psx.

donpatchi at video_mode 13 and vsync_mode 2 works at 58hz!

Posted: **Mon Jan 09, 2023 6:58 pm**

@BackDrift resync is normal, especially with PSX - many titles change resolution MANY times during into and play.

Posted: **Fri Feb 17, 2023 2:21 pm**

Hi,
have the ipad screen with the latest laserbear firmware installed.
Is it possible to deactivate the onscreen info?

Posted: **Wed Mar 22, 2023 7:18 pm**

I finally got a hardware flasher.

My board was dead from a bad flashing via displayport with hdmi adapter. It won't power on anymore and I could not reflash it from windows.
Now I've flashed it with a dedicated hardware and it's working!

And with a nice surprise, 640x480 over vga is working now! I can use it to play dreamcast

Seller from aliexpress gave me this firmware and it's working like a charm. I can share the firmware if anyone wants it.

Info screen now shows as "RTD2550". Previous firmware was "SVN3102"

Posted: **Fri Mar 24, 2023 6:38 am**

Yes. Please.

Posted: **Fri Mar 24, 2023 11:54 am**

The original firmware that came with the screen had this exactly viewtopic.php?p=42381#p42381.
My board is the hdmi and vga model and is exactly like this viewtopic.php?p=42458#p42458.

Seller gave me this new firmware. (attached)

Please use with caution and always make a backup of your original firmware!

Posted: **Thu Mar 30, 2023 7:53 am**

Thanks

Posted: **Thu Mar 30, 2023 3:48 pm**

And as always, note that the board and screen that this particular thread talks about does not require a firmware update to work out of the box.

(I know that sonik knows this, and he even states why he is doing the update, but as usual it’s easy to get confused and think that this is a necessity to get this screen working. It is not :)

Posted: **Fri Mar 31, 2023 12:36 pm**

Good reminder!
Probably all boards out there will just work out of the box. Right?

On another subject, I'm curious if anyone got VRR working won windows with laserbear board/firmware. I've tested 3 firmware versions and can't enable vrr on windows with any of them.
My gpu supports the feature and I can use it on the LG CX tv.

Posted: **Thu Jul 06, 2023 1:07 pm**

sonik wrote: ↑Wed Mar 22, 2023 7:18 pm
I finally got a hardware flasher.

My board was dead from a bad flashing via displayport with hdmi adapter. It won't power on anymore and I could not reflash it from windows.
Now I've flashed it with a dedicated hardware and it's working!

And with a nice surprise, 640x480 over vga is working now! I can use it to play dreamcast

Seller from aliexpress gave me this firmware and it's working like a charm. I can share the firmware if anyone wants it.

Info screen now shows as "RTD2550". Previous firmware was "SVN3102"

Where do I get this hardware flasher?

Posted: **Thu Jul 06, 2023 5:35 pm**

https://a.aliexpress.com/_EucHb3J

https://a.aliexpress.com/_EzAq1zL

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