520 series 4mb ram upgrade is done

[zaxon]

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 ?

[bandit]

Sounds good, is there a place I could look at the install manual ?

[+DarkLord]

I would be interested in at least 1 unit. Any chance we can get some screen shots?

 

Thanks!

[zaxon]

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.

[+wood_jl]

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.

[+Guitarman]

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/

[zaxon]

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.