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▲ 34 r/RetroTink

RetroTINK-4K experimental firmware Version 1.75.0 (2026-08-16)

A new RetroTINK-4K experimental firmware is available!

Version 1.75.0 (2026-08-16)

  • Default USB-Serial baud rate now 2,000,000 instead of 115,200
  • Implemented significantly expanded serial control interface on both USB and HD15 ports (example software and documentation pending)
  • Banner now operates on an 8-bit palette: 24-bit BMPs are palletized automatically while 8-bit BMPs are directly loaded with the embedded palette
  • Improved banner image quality, while using less FPGA BRAM resources, allowing RT4KCE to have the same quality as the Pro model
  • Banner now automatically color corrected when HDR is activated

Download from the RetroTINK 4K experimental Firmware Repository

reddit.com
u/nrq — 4 days ago
▲ 32 r/RetroTink

RetroTINK-4K experimental firmware Version 1.72.0 (2026-08-07

A new RetroTINK-4K experimental firmware is available!

Version 1.72.0 (2026-08-07)

  • Improved speed of the SMPTE 2084 calculation and LUT upload making the menu more repsonsive
  • Fixed the issue that broke vertical decimiation beyond factor 4
  • Added 640 mode to Saturn Detection

Download from the RetroTINK 4K experimental Firmware Repository

reddit.com
u/nrq — 13 days ago
▲ 19 r/RetroTink

RetroTINK-4K experimental firmware Version 1.67.0 (2026-07-31)

A new RetroTINK-4K experimental firmware is available!

Version 1.67.0 (2026-07-31)

  • NTSC-50 fully enabled by going to the SDP menu and forcing the mode manually.
  • Massive FPGA side infernal optimizations to reclaim ALMs for future use.

Download from the RetroTINK 4K experimental Firmware Repository

reddit.com
u/nrq — 20 days ago
▲ 24 r/RetroTink

RetroTINK-4K experimental firmware Version 1.65.1 (2026-07-28)

A new RetroTINK-4K experimental firmware is available!

Version 1.65.1 (2026-07-28)

  • Cleaned up HDMI Transmit side audio configuration settings.
  • Improved audio resampler lock speed.
  • VU meter now works and can monitor the levels coming out of the resampler.
  • More massive infernal optimizations, MCU side FW now uses less RAM and Flash than launch day.

Download from the RetroTINK 4K experimental Firmware Repository

reddit.com
u/nrq — 23 days ago
▲ 16 r/RetroTink

RetroTINK-4K experimental firmware Version 1.64.1 (2026-07-26)

A new RetroTINK-4K experimental firmware is available!

Version 1.64.1 (2026-07-26)

  • Clean compile after cleaning some lingering issues in the timing constraints.
  • Fixed I2S alignment issue when the audio resampler is used with HDMI inputs.

Download from the RetroTINK 4K experimental Firmware Repository

reddit.com
u/nrq — 25 days ago
▲ 24 r/RetroTink

RetroTINK-4K experimental firmware Version 1.63.0 (2026-07-25)

A new RetroTINK-4K experimental firmware is available!

Version 1.63.0 (2026-07-25)

  • Fixed interpolation kernel miscalculation in RoTATE mode.
  • Added ASRC audio re-sampler for HDMI (stereo only) and TOSLINK inputs.
  • Audio re-sampler is capable to taking off spec modes such as the SNES 32 kHz or the Gamecube 44.042 kHz and outputting a standard 48 kHz or 96 kHz.
  • Found in the audio menu. RT4K Pro only.

Download from the RetroTINK 4K experimental Firmware Repository

reddit.com
u/nrq — 26 days ago
▲ 17 r/RetroTink

RetroTINK-4K experimental firmware Version 1.61.0 (2026-07-24)

A new RetroTINK-4K experimental firmware is available!

Version 1.61.0 (2026-07-24) Version 1.62.0 (2026-07-24)

  • Implementation of tiled framebuffer for Rotation mode.
  • Implementation of quad banked interleaved DRAM acccess.
  • Max allowed input resolution for rotatable images is approx. 720x480p or 800x600. Interlaced inputs not yet supported.
  • Note: the cop for disabling illegal sized inputs is not fully implemented. For example if you try to rotate 1440x480p, you may see glitches. If you are rotating 480p sources, make sure the decimation is set so that the active input size is 720x480.

Download from the RetroTINK 4K experimental Firmware Repository

reddit.com
u/nrq — 28 days ago
▲ 44 r/RetroTink

RetroTINK-4K experimental firmware Version 1.59.0 (2026-07-16)

A new RetroTINK-4K experimental firmware is available!

Version 1.59.0 (2026-07-16)

  • On screen keyboard for entering profile file name on save.
  • If a current profile is loaded, a new save will be placed in the current folder instead of root.
  • Further massive infernal optimizations.

Download from the RetroTINK 4K experimental Firmware Repository

reddit.com
u/nrq — 1 month ago
▲ 20 r/RetroTink

RetroTINK-4K experimental firmware Version 1.56.0 (2026-07-14)

A new RetroTINK-4K experimental firmware is available!

Version 1.56.0 (2026-07-14)

  • File selection UI now has small arrows on the left hand side indicating more files off page in their respective directions.
  • Scrolling happens now in the middle of the page, before hitting the very end, so you can see files before and after the current selection.
  • DRAM controller carefully re-calibrated to improve upon the settings found in 2022.
  • Further infernal optimizations.

Download from the RetroTINK 4K experimental Firmware Repository

reddit.com
u/nrq — 1 month ago
▲ 20 r/RetroTink

RetroTINK-4K experimental firmware Version 1.53.0 (2026-07-10)

A new RetroTINK-4K experimental firmware is available!

Version 1.53.0 (2026-07-10)

  • RT4KCE now supports continuous auto decimation phase.
  • De-blur 8/4 removed from the Sample Rate Detection: experimental feature that was not reliable in the field to clawback resources.
  • Lumacode Enable is now: Off/On (AGC)/On (Manual). On (AGC) automatically analyzes the distribution of codes and calibrates slicer thresholds accordingly in real time. You can leave the ADC gain in its defaault position.
  • Internal optimization and timing cleanup.

Download from the RetroTINK 4K experimental Firmware Repository

reddit.com
u/nrq — 1 month ago
▲ 24 r/RetroTink

RetroTINK-4K experimental firmware Version 1.51.0 (2026-07-07)

A new RetroTINK-4K experimental firmware is available!

Version 1.51.0 (2026-07-07)

  • First attempt at LumaCode support. Both Pro and CE models are supported.
  • Enable LumaCode in the Sample Rate Detection -> LumaCode -> Enable.
  • Select a system preset. You will need to copy the lumacode directory over to the SD card.
  • Currently only the NES presets have been tested.
  • Preset file format first line dictates the sample rate, decimation factor and palette (LumaCode pixels/word implict in the number of palette entries).
  • Sample rate/decimation = LumaCode symbol rate. Higher decimation factors give more room for the auto phase.
  • Run auto-gain. If needed adjust ADC pre-gain further to tweak the slicer thresholds.
  • Limitations: only NES tested so far. GTIAdigitizer (Atari 8bit) 12-bit/pixel is not supported.
  • More internal optimizations to clawback resources.
  • As always, testing of these experimental builds is greating appreciated because they contain both new features and under the hood optimizations that don't offer anything new, but clear resources for future development.

Download from the RetroTINK 4K experimental Firmware Repository

reddit.com
u/nrq — 1 month ago
▲ 36 r/RetroTink

RetroTINK-4K experimental firmware Version 1.48.0 (2026-07-04)

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

reddit.com
u/nrq — 2 months ago
▲ 27 r/RetroTink

RetroTINK-4K experimental firmware Version 1.44.0 (2026-06-29)

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

reddit.com
u/nrq — 2 months ago