zaxon Posted May 22, 2011 Share Posted May 22, 2011 I finish made new boards for ram upgrade (for 520, 520 ST, STFm and similiar) up to 4 mb , prototype is in my PCB factory, instalation is simply. One board with 4 slots for 30 pin simm, plus 2 ribbon cable ending with proper connection, soldered on chip in ST. Fully manual aviable.Easy to solder. Price is approx 40 GBP plus postage cost, simm memory not included. Anybody ? Quote Link to comment Share on other sites More sharing options...
bandit Posted May 23, 2011 Share Posted May 23, 2011 Sounds good, is there a place I could look at the install manual ? Quote Link to comment Share on other sites More sharing options...
+DarkLord Posted May 23, 2011 Share Posted May 23, 2011 I would be interested in at least 1 unit. Any chance we can get some screen shots? Thanks! Quote Link to comment Share on other sites More sharing options...
zaxon Posted May 24, 2011 Author Share Posted May 24, 2011 Some photos, it is orginal ram expansion on it but i was made very similiar clone. https://picasaweb.google.com/zaxoniec/StRam?authkey=Gv1sRgCM21gNra6PSUiAE# 2 adapters, one soldering job is fit 40 pin socket on to shifter. Quote Link to comment Share on other sites More sharing options...
+wood_jl Posted May 25, 2011 Share Posted May 25, 2011 Hi. This will work with the original 520ST (or 520STm, NOT talking about STfm)? I mean the one with no floppy drive built-in????? For some reason, I have seen people (who know more than I do) talk about it is easy to get old 520ST to 2.5 MB but is there something different about the MMU (or something?) that makes it harder to get to 4MB with the old machine? I would very much like to have the old 520STm with 4MB RAM. Quote Link to comment Share on other sites More sharing options...
+Guitarman Posted May 25, 2011 Share Posted May 25, 2011 Looks like the Marpet upgrade. Here are some other pics of one in one of my ST's. Very easy install. It is the last 6 pics in this gallery. http://www.atariage....t-ram-upgrades/ Quote Link to comment Share on other sites More sharing options...
zaxon Posted May 25, 2011 Author Share Posted May 25, 2011 Yes, marpet was base to my device. Wood_jl unfortunatelly i dont have 520 "short" for tests, prices on ebay is crazy.But i working on it. Quote Link to comment Share on other sites More sharing options...
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