A new RetroTINK-4K experimental firmware is available!

Version 1.96.1 (2026-10-10)

• Fixed bug that dropped data in decimation factor 5x
• Further tuning of thresholds

Download from the RetroTINK 4K experimental Firmware Repository

A new RetroTINK-4K experimental firmware is available!

Version 1.96.0 (2026-10-09)

• Second-generation inverse telecine engine for RT4KPRO with two field look back decorrelation analysis and multi-tap filter bank artifact detection
• Dual FPGA and MCU detection state machines for fast lock / unlock
• Result is significantly improved inverse 3:2 and 2:2 reliability
• For example, Final Fantasy X cutscenes should be nearly free of artifacts and adapt quickly to changing frame rates
• New inverse telecine engine does not need manually tuned thresholds (removed from menu)
• Minor fixes to the XBR smoother plus optimization to reduce the amount of resources used

Download from the RetroTINK 4K experimental Firmware Repository

A new RetroTINK-4K experimental firmware is available!

Version 1.95.0 (2026-10-08)

• Many bug fixes for edge cases and rarely used modes and functions
• Cleaned-up HDMI output audio mute policy: no more garbage audio when no valid audio input is present
• Improved handling and scaling of content when 1080i is selected as the output mode
• Fixed Auto Fill Int and Int HV behavior at higher decimation rates

Download from the RetroTINK 4K experimental Firmware Repository

A new RetroTINK-4K experimental firmware is available!

Version 1.93.1 (2026-10-02)

• Further cleanup of true VRR generation
• ALLM automatically enabled when the display reports support

Download from the RetroTINK 4K experimental Firmware Repository

A new RetroTINK-4K experimental firmware is available!

Version 1.93.0 (2026-10-02)

• Improved VRR compatibility
• True VRR now works with BFI (same as Gen Lock)

Download from the RetroTINK 4K experimental Firmware Repository

A new RetroTINK-4K experimental firmware is available!

Version 1.92.0 (2026-09-30)

• True VRR capability added, the best of all worlds for supported displays: minimal lag, glitch-free resolution changes and a perfectly stable clock
• Better than Gen Lock: the pixel clock stays completely stable, so the momentary blip in video or audio on some less tolerant displays is completely avoided with true VRR
• True VRR available for all models: RT4K Pro, RT4K CE and RT6X CE
• To enable, go to the HDMI Output menu and select FreeSync or VESA
• Automatic fallback for non-VRR displays: the mode stays injection only
• Currently does not support BFI: a significant rework of the BFI engine is required
• Minor remote control optimizations

Download from the RetroTINK 4K experimental Firmware Repository

A new RetroTINK-4K experimental firmware is available!

Version 1.91.0 (2026-09-29)

• Rotation now supports 480i and 576i sources (RT4K Pro)

Download from the RetroTINK 4K experimental Firmware Repository

A new RetroTINK-4K experimental firmware is available!

Version 1.90.0 (2026-09-28)

• Adaptive cancellation of secondary artifacts for auto decimation and phase detection
• Combined with the 1.89.0 harmonic nulling, this should result in reliable sample rate detection even under ambiguous and poor signal conditions

Download from the RetroTINK 4K experimental Firmware Repository

A new RetroTINK-4K experimental firmware is available!

Version 1.88.0 (2026-09-27)

• Rotate can now accept up to 1280x720p input sources
• Fixed RT6X issue where 1920x1080p may glitch when used in Gen Lock + a buffer delay of a full frame
• DRAM controller optimizations to clean up glitches that may have been encountered on edge cases / rarely used non-standard resolutions
• Further cleanup of edge cases that caused edge garbage pixels on the left and right sides for rarely used sample rates / input sizes
• Slightly faster Enhanced S-Video chroma alignment lock when pathological conditions are encountered

Download from the RetroTINK 4K experimental Firmware Repository

A new RetroTINK-4K experimental firmware is available!

Version 1.87.4 (2026-09-26)

• Further SDP alignment optimizations
• Renamed N64 mode to N64 Auto Deblur to indicate detection of interpolated output and reconstruction of the original 320-wide source

Download from the RetroTINK 4K experimental Firmware Repository

Version 1.87.3 (2026-09-25)

• Third-generation LumaCode engine
• Replace the lumacode folder on your SD card with the one in this zip
• Start from the default profile, set LumaCode Enable to On (AGC), and adjust Word Trim only if needed
• The revised AGC and automatic word alignment should make further adjustment unnecessary
• All systems recalibrated against the reference implementation

Download from the RetroTINK 4K experimental Firmware Repository

A new RetroTINK-4K experimental firmware is available!

Version 1.82.1 (2026-09-18)

• Further re-write of the HDMI transmitter drive
• Second generation lumacode decoder engine implemented
• Improved automatic symbol learning and calibration
• Try leaving it in the defaults settings: On (AGC), auto decimation phase, auto word phase
• Zip file contains updated lumacode .lmc files fixing errors including the NES blacker than black entry and default word alignments for each system

Download from the RetroTINK 4K experimental Firmware Repository

A new RetroTINK-4K experimental firmware is available!

Version 1.80.1 (2026-09-12)

• Fixed screw-up with banner image alignment on the last RT6XCE FPGA build

Download from the RetroTINK 4K experimental Firmware Repository

A new RetroTINK-4K experimental firmware is available!

Version 1.80.0 (2026-09-11)

• Recalibrated RT6XCE SDRAM controller eliminating glitch on a small subset of units
• RT6XCE SDRAM controller now uses gearbox
• Overall stability improvements in HDMI output transmitter and self-healing, especially at lower resolutions
• Fixed excessive dwell time on querying HDMI transmitter status
• (Related to above) solved data transmission errors when flow control is not used due to stall
• Increased serial TX / RX buffer such that the ACK mode is safe by construction across all baud rates
• Added CRC16 only ACK mode to avoid SHA256 penalty per block
• Added ability to transfer the video input measurement struct across the serial link
• Fixed VGA detection rules for DOS 400p and 1600x1200

Download from the RetroTINK 4K experimental Firmware Repository

A new RetroTINK-4K experimental firmware is available!

Version 1.77.0 (2026-08-28)

• Deployed RT6X FPGA images / Compatible with RT6X
• Improved compatibility with legacy SD / MMC cards
• Fixed off by 1 pixel alignment issue with the upgraded banner

Download from the RetroTINK 4K experimental Firmware Repository

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