Kernel v4.0b for R4 SDHC Gold Pro/RTS Lite/Dual-Core/Snoopy/Upgrade (r4isdhc.com) 2021-04-10

Firmware/kernel for R4iSDHC line of flashcards:

• R4 SDHC Gold Pro
• R4 SDHC RTS Lite
• R4 SDHC Dual-Core
• R4 SDHC Snoopy
• R4 SDHC Upgrade

Not compatible with R4iSDHC cards produced before 2014. Works with latest 3DS and DSi firmware updates.

Timebomb: September 3, 2024.

After timebomb, you can go back in time to make the card work, or use YSMenu (https://gbatemp.net/download/retrogamefan-multi-cart-update.35737/). Use YSMenu made for R4i-SDHC, it's for a different card but works perfectly.