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MiSTer RTC Real Time Clock Board v1.3


The MiSTer RTC board is a Real Time Clock addon board, this is the current v1.3 revision and is provided with a CR1220 battery backup.

(7 customer reviews)

6 in stock


Some cores such as the ao486 (PC), Archie (Acorn Archimedes), BBC Micro Master 128K, Color Computer 2 (CoCo2), Commodore 64 (C64), Game Boy, Game Boy Color, Game Boy Advance, Minimig (Amiga), NeoGeo, MSX, TSConf (ZX Spectrum), QL (Sinclair QL), Zet98 (PC-98), PC8801, X68000 use a clock, so MiSTer is able to provide the real time for such cores with the addition of this addon board.

This addon board provides real time offline, another benefit is any data written to the MiSTer’s Micro SD card will have the correct timestamp. The RTC board for the MiSTer FPGA is plugged into the Terasic DE10-Nano’s LTC connector.

The STL files for 3D printing support brackets are : MiSTer Real Time Clock Support Brackets

You can be reassured knowing each Real Time Clock (RTC) v1.3 board has been tested before despatch on a live MiSTer setup.

✅ Suitable For Terasic DE10-Nano FPGA Board
✅ MiSTer IO Board Compatible
✅ Includes CR1220 Backup Battery
✅ Genuine STMicroelectronics M41T81
✅ Fully Assembled & Tested

  1. Mike May

    This is a worthy addition to the MiSTer, great for use with the AMIGA core. Whilst not as essential as the SRAM upgrade is still good for enthusiasts. Excellent quality craftsmanship from Nathan, and quality parts used throughout.

  2. Pezz82

    Item works great and the small 3D printed supports are easy to fit and also keep it nice and safe, quite useful to have if you are using the Amiga core etc..

  3. Kreeblah (verified owner)

    This works exactly as advertised. I boot up my MiSTer, and I get the time coming up immediately. The soldering is very clean, too, and it has quality parts on it.

  4. robibennobi (verified owner)

    Great item, well made and does it’s job really well.

  5. Per Gollubits (verified owner)

    Not really a necessity but pretty handy when emulating computers and not just consoles. Easy to install and even came with the correct date already set.

  6. Nadim Slim (verified owner)

    I bought this addon board from Nat. Really well built, and even though it is not really necessary it is a nice to have for the cores that can use it to keep accurate time. It worked really well for me. Thanks

  7. Jonathan Leech (verified owner)

    As usual a very well made item. The 3D supports confused me at first but a quick google showed me how to fit them in place. It all fits perfectly and is a nice addition when using Amiga, Atari ST etc. Nat is great and you can order with confidence. I definitely recommend this site.

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SKU: MiSTer-RTC-v1-3 Category: Tags: ,

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