just a heads up, KRIKzz released a OS-7-BETA for the Master-ED, featuring a new gui (similar to mega-ED and the famicom/pce ones) , sdhc/fat32 support and automatic sram creation/backup...
<img alt="[IMG]" class="bbCodeImage LbImage" data-url="http://i42.tinypic.com/119nl21.jpg" src="http://i42.tinypic.com/119nl21.jpg"/>
<div class="bbCodeBlock bbCodeQuote">
<blockquote class="quoteContainer"><div class="quote">1)FAT16 is not supported anymore!!!
4)saves auto backup<br/>
5)new menu interface<br/>
<a class="externalLink" href="http://krikzz.com/pub/support/index.php?dir=ms-everdrive/os-bin/" rel="nofollow" target="_blank">http://krikzz.com/pub/support/index.php?dir=ms-everdrive/os-bin/
Completelly new OS core, sources of old os was not used at all.
Few months ago i started work over unified OS, which will be used for SMS, GB/GBC, and may be for some other carts. At this moment unified OS supports SMS/GG and EDMD-V3. SMS version is a first published build of this OS. EDMD-V3 version is not published at the moment, but it looks completely like original edmd-v3 OS and have identical functions, but may be with some "bug features" in addition <img alt="" class="mceSmilieSprite mceSmilie1" src="styles/default/xenforo/clear.png" title="Smile "/>
New unified OS is very optimised in terms of memory usage, it allow increase file per folder limit. SMS-ED now can handle up to 512 files per folder, genesis version can handle few thousands of files per folder</div><div class="quoteExpand">Click to expand...</div></blockquote>
</div> source: <a class="externalLink" href="http://krikzz.com/forum/index.php?topic=1184.0" rel="nofollow" target="_blank">http://krikzz.com/forum/index.php?topic=1184.0</a>
This was a much needed update IMHO especially the gui/sram stuff... it really make the cart shine <img alt="" class="mceSmilieSprite mceSmilie1" src="styles/default/xenforo/clear.png" title="Smile "/>
<span style="text-decoration: underline">update tip:[/span]
use your existing FAT16 sd card to update to the latest OS (via the options menu) , when the update is done just power off the sms, fat16 is <b>no longer</b> supported at all! Put the sd to your computer, convert it to FAT32 and then use it with the updated master-ed... if the card is not fat32 then you get an error on startup like I did lol