During the weekend I finished the SD card driver for SymbOS, which is now fully working. You can boot SymbOS directly from the MicroSD of the M4Board within seconds without the need of any additional roms or discs. I am currently using the MotherX4 + M4Board + X-Mem, and it works like a charm. I just miss a mouse right now. Here is a little video which I made, just to show, that the SD card is working fine:
[youtube]https://www.youtube.com/watch?v=qFMxevy7daI[/youtube]
https://www.youtube.com/watch?v=qFMxevy7daITBH I should convert some new videos and graphics after 10 year

Reading from the M4Boards' SD card is about 25% faster than reading from the SYMBiFACE II and compatible devices (CPC-IDE, X-MASS) due to the fact, that you can use LDI:LDI:LDI:... instead of INI:INC B:INI:INC B:INI:INC B:... etc. thanks to the memory mapped buffer of the M4Board. For writing there is no difference, it is port based like the SF2. But in most cases reading speed is more important anyway.
I have to fix two little issues before releasing an M4Board version of SymbOS hopefully this week. Bugfree Network support may take a little bit longer. Thanks a lot to Duke again!

CU,
Prodatron