Woooo, cool, really
Now this combined rom+ram+sd solution (with external SPI) does everything I was thinking about in the past. Except one: some kind a - let's name it - "short bus" to easly add simple hardwares (which are not SPI) doing only 8 bit I/O and some pre-decoded select signals etc with more compact connector. But besides that it can do everything now, most people would ever require
A typical example for this: adding an RTC chip. Otherwise you would require to decode the I/O port, the control bus signals etc and you also need a large, not so easy to get/build connector just to connect a little IC onto your lovely EP
