Atari Mega4 CH03: Upgrade TOS to 1.04 and replace noisy PSU fan with a silent Noctua fan

Retronaut · Post by **Retronaut** » 15 Jun 2025 17:43

Atari Mega4 CH03: Upgrade TOS to 1.04 and replace noisy PSU fan with a silent Noctua fan

My Atari Mega 4 arrived installed with its original German language TOS 1.02 ROM chips.
Now, i'm not a German speaker, so upgrading to English TOS 1.04 is the first thing I will tackle in this video.
With that done, there is the noisy PSU fan. A perfect candidate for a new, near silent Noctua fan replacement.
With these in place, do we FINALLY have a Mega ST thats ready to rock? Lets see!

Steve · Post by **Steve** » 15 Jun 2025 19:19

I would highly recommend EmuTOS 1.4. It'll provide you with a lot more functionality including built-in hard disk driver.

Retronaut · Post by **Retronaut** » 16 Jun 2025 00:39

I'll take a look at it. I guess its available as a 6 ROM version, 192kb? Also, assuming that is the case, as its a smaller ROM size, is this a more cut down version of EmuTOS compared to say the 256kb ROM versions?

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