+Larry Posted March 12, 2007 Share Posted March 12, 2007 I'm looking for a mod for either an XL or (preferably) an XE to add a non-volatile 512 KB or larger ramdisk. Either SRAM or battery-backed, and can co-exist with MyDos. But working under SDX would be OK, too. Are there any? Thanks. -Larry Quote Link to comment Share on other sites More sharing options...
Rybags Posted March 12, 2007 Share Posted March 12, 2007 (edited) SRAM = Static RAM. It's still volatile and would have to be battery backed. The main difference is that SRAM doesn't need to be refreshed, so can run faster (not that the Atari will benefit from that). People have done such mods - although I'm unsure if there's many "official" projects which are readily available. I think "The Freezer" has battery-backed ability. Edited March 12, 2007 by Rybags Quote Link to comment Share on other sites More sharing options...
mimo Posted March 12, 2007 Share Posted March 12, 2007 Check out Beetles signature, and post #64 in this thread Sure a pm to beetle will lead you in the right direction Quote Link to comment Share on other sites More sharing options...
ndary Posted March 13, 2007 Share Posted March 13, 2007 Bob Wolley made such upgrade in the past, let me try and find some documents on it Quote Link to comment Share on other sites More sharing options...
Beetle Posted March 13, 2007 Share Posted March 13, 2007 (edited) Hi Here is my 1250XLD's 512k SRAM upgrade. In this case its not backed by a battery but a 1F goldcap. Mega-Hz (Wolfram Fischer) makes and sells them, i can PM you his eMail adress. Its fully assembled and tested, installing is very easy, no upwards-bending of IC pins nor cutting traces. Fully reversable (and movable to other XL/XE). cya, Beetle Edited March 13, 2007 by Beetle Quote Link to comment Share on other sites More sharing options...
+Larry Posted March 13, 2007 Author Share Posted March 13, 2007 Bob Wolley made such upgrade in the past, let me try and find some documents on it Hi- You have refreshed my memory cells -- I believe I have that issue of Atari Classics. Thanks, Larry Quote Link to comment Share on other sites More sharing options...
+Larry Posted March 13, 2007 Author Share Posted March 13, 2007 Hi Here is my 1250XLD's 512k SRAM upgrade. In this case its not backed by a battery but a 1F goldcap. Mega-Hz (Wolfram Fischer) makes and sells them, i can PM you his eMail adress. Its fully assembled and tested, installing is very easy, no upwards-bending of IC pins nor cutting traces. Fully reversable (and movable to other XL/XE). cya, Beetle Hi Beetle- Wow! That looks very nice. And already built/reversible/very nice design -- music to my ears! -Larry Quote Link to comment Share on other sites More sharing options...
a8isa1 Posted March 13, 2007 Share Posted March 13, 2007 Hi Here is my 1250XLD's 512k SRAM upgrade. In this case its not backed by a battery but a 1F goldcap. Hi Beetle, may I ask the purpose of the 1F "goldcap"? Does this suffice in place of a battery? If so then how long does it last in this role? And if not for backup purposes is it there so that the RAMdisk will survive a cold boot? I've done a couple of projects with SRAM but I've always used an NV memory controller and a battery if I wanted a power backup. - Steve Sheppard Quote Link to comment Share on other sites More sharing options...
Beetle Posted March 13, 2007 Share Posted March 13, 2007 Lasts for days, if not weeks. Quote Link to comment Share on other sites More sharing options...
+bf2k+ Posted March 14, 2007 Share Posted March 14, 2007 Mega-Hz (Wolfram Fischer) makes and sells them, i can PM you his eMail adress. ... I'd also be interested in getting one of those. Quote Link to comment Share on other sites More sharing options...
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