Marpet XTra RAM Deluxe 4MB upgrade for my Atari STFM. Turning it into a 4160STFM.

Let's try making our own SIMMS and upgrade my ST to 4 megabytes! One of the first upgrades I ever got for my ST was a RAM upgrade to take it from the stock 512KB to 1MB. The one I got was the Marpet XTra RAM Deluxe board as I quite liked the idea of being able to add more RAM in the future. At the time I never did, but it's the future now, so that's exactly what I'm going to do. At some point in the machine's past I did stick two 1MB SIMMs in it to take the machine to 2.5MB but I don't remember when or why. They might have been spares from upgrading a PC. Initially I wanted to try out making my own SIMMS using a PCB design I found on github but for some reason it didn't work. It's possible I have the wrong RAM chips or I damaged them somehow when soldering. I'm not quite sure. Web: https://ncot.uk/electronics/upgrading-my-atari-st-to-4mb/ Ko-Fi: https://ko-fi.com/ncot_tech Twitter: https://twitter.com/NCoT_Tech Title: Marpet XTra RAM Deluxe 4MB upgrade for my Atari STFM. Turning it