A new RetroTINK-4K experimental firmware is available!

Version 1.48.0 (2026-07-04)

• The Horizontal Blur filter engine has been rewritten from the ground up [RT4K Pro Only]. The old first-order filter is now a true second-order design, which enables a whole family of new filter types with no change in processing latency.
• The original two modes are still there, renamed to reflect what they actually are: "IIR LPF" is now "RC Lowpass" and "IIR HPF" is now "RC Peaking". They behave the same as before and existing profiles carry over automatically.
• Three new lowpass types, in order of steepness: Gaussian (zero ringing by construction, the gentlest), Butterworth (maximally flat), and Elliptic (the sharpest cutoff).
• Three new notch types: Notch, Notch Wide, and Notch + Low. Instead of rolling off everything above the cutoff, these remove a narrow frequency band and leave the rest of the picture alone.
• Notch filters are aimed at cancelling dither patterns at their exact frequency. For example, Notch + Low at 3.35 MHz is well suited for cancelling Genesis/Mega Drive dithering -- the "+ Low" variant also gently shelves everything above the notch to mop up the leftover high-frequency residue.
• The filter frequency control now adjusts in 0.05 MHz steps for much finer tuning. Existing profile values are migrated automatically.
• Corrected the filter frequency calibration on the composite/S-video decoder path (it was previously off by a factor of 2).
• Fixed two long-standing bugs in the edge detection of the motion adaptive deinterlacer. Diagonal edges should now resolve more consistently.
• Internal optimizations.

Download from the RetroTINK 4K experimental Firmware Repository

A new RetroTINK-4K experimental firmware is available!

Version 1.44.0 (2026-06-29)

• Fixed bug introduced a few versions ago where horizontal scaling changes were no long smooth.
• AUX4 now resets input crops to their base position (thank you cobhc for the idea).
• Fixed edge case handling of custom modelines from the sd card. Keep Cur. Res. only works for slots 1/2 (the universal ones) since otherwise it would overwrite the profile's existing data.
• Added "Native Sampling" to Video ADC menu. For applicable modes (Auto Fill, Proportional, Auto Fill Int/+ and where a know PAR is present or Free Form), the ADC sample rate will automatically track such that no horizontal scaling is needed.
• Note: the ADC has a maximum sample rate of 4095 and that CE models have a maximum input width of ~2048, so at 4K resolutions, this feature works only on the Pro model. For out of bound values, the ADC sample rate is set to the maximum and the horizontal scaler is used.

Download from the RetroTINK 4K experimental Firmware Repository

A new RetroTINK-4K experimental firmware is available!

Version 1.42.0 (2026-06-27)

• EDTV Sample Rate Detection is now Off/On/On+VGA.
• On+VGA applies the CEA-861 timing when 480p type signals are detected on RGBHV (useful for Dreamcast).
• Sample Rate Detection adds Link Scaler/Vert.
• Turning Link Scaler/Vert. means that all decimation factors use the same base scaling mode and vertical scaling factor.
• Useful if you only want to define the horizontal settings for each decimation factor but want the vertical settings to be universal.

Download from the RetroTINK 4K experimental Firmware Repository

A new RetroTINK-4K experimental firmware is available!

Version 1.40.0 (2026-06-25)

• Internal optimizations

Download from the RetroTINK 4K experimental Firmware Repository

A new RetroTINK-4K experimental firmware is available!

Version 1.37.0 (2026-06-23)

• Smooth I/P no longer incurs a vertical sharpness loss when Bilinear Sharp is used and the underlying source image is progressive.
• Folder notes (\_info.txt) can now take up nearly the entire height of the OSD.
• Reworked the scaler mode help/tips thanks to Mr. Moro.

Download from the RetroTINK 4K experimental Firmware Repository

Hey everyone,

We've had a few posts recently that showed it is necessary to get everyone on the same page, so the mod team has put together a clearer set of rules to keep things running smoothly.

The short version:

1. Be respectful: disagree all you want, but keep it civil.
2. Retrotink-related content only: setup, troubleshooting, comparisons, captures, firmware. We can't offer general support for things like capturing when no Retrotink device is involved.
3. No buy/sell/trade: we can't vet users, and these devices are expensive, so we won't host transactions we can't stand behind.
4. No piracy or illegal content: emulation discussion is fine, talking about ROMs and hardware to play them (Everdrive, SD2SNES, etc) is fine, sourcing copyrighted files is not.
5. No spam or excessive self-promotion: sharing your own work is welcome in moderation.
6. Moderator discretion: we may step in to protect the community in cases the rules above don't spell out.

And keep in mind we're an unofficial support community. The official support happens in the Retrotink Discord.

The full rules are in the sidebar. The buy/sell/trade rule is the main new addition, and it's there for your protection as much as ours, so please don't arrange trades through the sub.

Thanks for being part of the community.

A new RetroTINK-4K experimental firmware is available!

Version 1.31.0 (2026-06-17)

• "Simple" and "Regular" mode now unified.
• "Simple mode" replaces page 1 of the "Regular" menu.
• As before, profiles loaded via Browse Starter Packs retains the current input and resolution until it is saved on the same unit.
• Accordingly, the HDMI output link goes to the full HDMI menu and the Profiles link goes to the full profile management menu.
• AUX 8 remains a quick shortcut to the Advanced Settings page.
• EDTV mode added to the "Sample Rate Detection" menu. Enabling EDTV mode sets the sample rate to 3432 (480p) and 3456 (576p) with a decimation factor of 4 with auto phase possible (Pro models)
• Folders may optionally contain an "_info.txt". If present, the contents will be rendered at the bottom of the file selection menu.

Download from the RetroTINK 4K experimental Firmware Repository

A new RetroTINK-4K experimental firmware is available!

Version 1.28.0 (2026-06-15)

• Adaptive Triple Buffer is now the default mode.
• Adaptive Triple Buffer now also selects the true 50 Hz or 60 Hz CEA-861 variant rather than simply adjusting the clock.
• This should eliminate edge cases where some TVs reject for example, 4K60 CEA-861 timings but clocked at 50 Hz.
• Automatic timing switching also applied to Gen Lock and Frame Lock modes.
• Buffering menu reordered: Adaptive Triple Buffer (default), Gen Lock, Frame Lock, TBC, Triple Buffer (last). Existing profiles migrate automatically.
• AUX 8 button is now mapped to pull up the Regular menu if in Simple Mode and vice versa. This allows users quick access to the alternate system without switching modes.
• Fixed loading custom IR remote code sets (ir_remote.txt) from the SD card, including remotes that use higher address codes.
• Vertical Pan readout now shows the scale factor (e.g. 6x).

Download from the RetroTINK 4K experimental Firmware Repository

A new RetroTINK-4K experimental firmware is available!

Version 1.27.0 (2026-06-12)

• Fixed edge case in Int+ and Int HV+ mode where if the factor is already a perfect integer, the scaling does not jump up to the next highest integer factor.
• New "Vertical Pan" control for the Auto Fill Int+ and Auto Fill Int HV+ scaling modes. Slides the picture up or down within the vertical overscan to help optimize the viewable portion without having to go through the more complex process of manually trimming both the top and bottom crop controls.
• New "Simple Mode" (Beta): a streamlined, single-page menu with the basics (input source, output resolution, profiles, and basic picture controls) plus a short on-screen tip for whatever item is highlighted. Turn it on under OSD/Firmware by selecting "Switch to Simple Mode", and use "Switch to Regular Mode" to leave. Your choice is remembered across power cycles.
• Simple Mode is an opt-in beta we're putting out for feedback. Please report anything confusing or unclear, especially the on-screen tips and the way profiles load and save.
• "Browse Starter Packs" loads ready-made profiles from the /profile/_starter folder on the SD card. Currently this folder is mostly empty with a few new CRT profiles for fun and some example console profiles. If this feature rolls out permanently, we will need to curate it.
• In Simple Mode, loading a profile that wasn't saved on this unit (for example a Starter Pack, or a profile made on another device) keeps your current input and output resolution and only applies the picture settings, so a Starter Pack won't unexpectedly change your input or screen resolution.
• In Simple Mode, once you save a profile on this exact unit, loading it afterward also restores its saved input source and output resolution.

Download from the RetroTINK 4K experimental Firmware Repository

A new RetroTINK-4K experimental firmware is available!

Version 1.24.0 (2026-06-09)

• New "Keep Cur. Input" and "Keep Cur. Res" options in the Load Profile menu. When you manually load a profile, these let you stay on your current input and/or resolution instead of switching to whatever the profile was saved with.
• "Keep Cur. Res" has "Off", "On" and "On + Auto Scale".
• "On + Auto Scale" analyzes the scaling mode and settings in the profiles and resizes the picture proportionally to intelligently translate the scaling settings from the profile's output resolution to the current output resolution.
• These two settings are profile invariant (globally applied not locked to a profile).
• These two settings do NOT apply to profiles autoloaded for SVS or DV1 (for obvious reasons).

Download from the RetroTINK 4K experimental Firmware Repository

A new RetroTINK-4K experimental firmware is available!

Version 1.23.0 (2026-06-08

• Fixed custom modeline loading glitch that caused the incorrect paramters to be loaded when the same slot is used twice in a row
• Cleaned up BFI menu: Blur is no longer adjustable in MPRT and CRT Sim modes since Blur is not applicable
• Cleaned up BFI pattern visualization for MPRT and CRT Sim modes
• Added new scaling modes: Auto Fill Int+, Auto Fill Int HV, Auto Fill Int HV+ (useful for console optimal sampling modes)
  • Auto Fill Int+ rounds the vertical factor: similar to 1080pOver on the 5X
  • Auto Fill Int HV is takes the Auto Fill Int result, calculates the horizontal based on the PAR, and rounds the Horizontal to the nearest integer value
  • Auto Fill Int HV+ is the same idea but overscans the vertical factor
  • Useful to acheive ultra sharp pixels while attempting to maintain a reasonable final AR approximation

Download from the RetroTINK 4K experimental Firmware Repository

A new RetroTINK-4K experimental firmware is available!

Version 1.21.0 (2026-06-05)

• Modeline slots 3/4 are now user definable by loading a file from the /modelines folder
• 3/4 opens a file dialog box after which the selectede modeline is immediately loaded
• Once loaded, it can also be recalled with custom resolution 3/4 button on the remote
• If nothing is specified, 3/4 loads custom3/4.txt as before
• 3/4 are saved on a per profile basis
• BFI menu now displays the exact BFI pattern to help visualize blur/strobe

Download from the RetroTINK Firmware Repository

Mike is on a roll:

A new RetroTINK-5X experimental firmware is available!

Version 4.02 (2026-06-01)

• Removed "Smoothing" (not present) from the vertical interpolation options and repalced with with Off/Nearest Neighbor

Download from the RetroTINK experimental Firmware Repository

A new RetroTINK-5X release firmware is available!

Version 3.98 (2026-06-01)

• Consolidation of changes from previous stable release
• Added Edge Adaptive deinterlacing "MA Smoother" in the deinterlace menu to help reduce aliasing when "Bob" is used
• Rolled in revised Inverse 2:2 deinterlacer from RT4K to weave 30 fps games output as 480i
• Improved lock and unlock stability for unstable sources such as VHS
• Added the RT4K "Smooth I/P" function for glitch-less 240p/480i transistions (also helps with VHS capture if turned on)
• Improved S-video quality

Download from the RetroTINK release Firmware Repository

A new RetroTINK-4K experimental firmware is available!

Version 1.17.0 (2026-05-31)

• Implementation of hardware abstraction layer
• More (extensive) internal clean up
• No new features (yet)
• Consider 1.10.0 as the stable in the interim

Download from the RetroTINK Firmware Repository

A new RetroTINK-4K experimental firmware is available!

Version 1.10.0 (2026-05-26)

• Fixed deep buried logic error that prevented CRT simulation (alternating scanlines) deinterlacing from working in 120 Hz / 240 Hz / etc
• Internal clean up
• Reset the verion count system

Download from the RetroTINK Firmware Repository

A new RetroTINK-5X experimental firmware is available!

Version 4.01 (2026-05-21)

• 1080p50 modes now all use the canonical CEA-861 timings at 148.5 MHz instead of the 60 Hz version.
• 60 Hz and 50 Hz sources have independent output resolution selection.
• "Lock to 60 Hz" behavior is cleaned up - enabling means 50 Hz sources use the 60 Hz selected output mode and triple buffer to 60 Hz.
• Sink EDID is parsed to detect if HDR10 is supported.
• HDR setting in the HDMI menu is now default "Auto". If a display supports HDR10, it is automatically enabled for CRT presets only if the display supports it. The HDR mode can also be forced to HDR10, HLG or off for all cases.

Download from the RetroTINK Firmware Repository

A new RetroTINK-5X experimental firmware is available!

Version 4.00 (2026-05-16)

• Version 4.0 "CRT Simulation Edition"
• Ported RT4K RGB 4:4:4 12bpc Linear Light pipeline
• Outputs true HDR10/HLG with Rec. 2020 conversion and adjustable PQ
• Scanline engine supports Energy Normalization
• RGB Shadowmask and new CRT presets
• "Quasi-4K" modes with 3880x960, 2880x1200, 2880x1080 output for full native horizontal resolution on 4K TVs to preserve mask quality
• Limitations

--Rev A (Launch PCBs) may be capped to 1080p until the Gen Lock code is rewritten
--Rev B (before mid-2022) have degraded shadow mask quality, the mask may need to be changed to a mono type
--Rev C, the majority of units made, have no limits
--Current build does not have inverse telecine or MADI, which requires further and extensive re-optimization and memory management.
-This branch is focused on maximizing the quality of CRT effects and plug and play operation (generic sampling, CRT-sim deinterlace, etc.)

Download from the RetroTINK Firmware Repository

Krikzz firmware server shows a new folder under the Everdrive 64 structure, a new entry called "pro-series". It contains a tool to convert meta data (cover art?) into a format the new cart can read. Readme.txt says:

> This tool is intended for converting a metadata database into a format optimized for EverDrive-64 PRO.

So I guess we'll see the announcement of a new Everdrive 64 Pro soon? I'm curious what features this could have that the Summer Cart 64 doesn't. It's going to be tough to beat that one on features and price.