We now know that some games will not be original in the sense that they will require patching, This does not apply to every game however but there will be some that will be the same as the bootlegs out there already and a handful that may not work at all. Its early days still at this point though so it may change. It certainly cannot be assumed today that the device will work with all original games titles until darksoft says so (some game may end up being incompatible). I'm sure its his aim, just don't take it as read yet that it will.
On the two types of devices put forward the specs have changed slightly. The loading time in option 2 has gone from 40 seconds to 75 seconds (for the large games). Option 1 has had the battery option removed. For this reason many look to have changed to want option 1 instead.
Relating to option 1 there is a mixed signal coming from darksoft and mitsu as to how it would swap between 4 games. Mitsu says it will emulate a 4SLOT, darksoft says he does not want to insert code for game swapping. I'm more inclined to think it will more end up as darksoft currently suggests in that it will more closely emulate how a 4in1 multicart would work (without a menu) than a true 4SLOT. On AES for example I take darksofts idea is to have a button on the cart you press and the next game will come in (please correct me if I'm wrong). Its not the ideal way, defo not like a true 4SLOT, but its not bad either from an AES standpoint at least.
When thinking about swapping between 4 games as a real multislot would, its not just the reloading of soft dips you need to think about (although that is a vital component). There is the backupRAM to load/save if MVS. There is the attract mode cycle to handle and only allowing game swapping dependant on softdip setting. Most importantly however would be how credits are handled. On a genuine 4SLOT you insert a credit and can then cycle between 4 games, the system must not be allowed to reset at all during game swaps or you loose your credit. To truly do game swapping like a 4SLOT all these criteria would need to be met. Its possible to do all this from within the cart with no bios help but custom code would be required on the cart to handle it.
I have one query as its not been mentioned yet I believe. Will the SD card placement be inside the cart or will one have access to push it in and pop it out without opening the cart shell?