What will happen when we are using a cartridge SD controller and other EXDOS extension devices together ?

IDE controller card (what is an EXDOS extension device, too) can work together with the WD floppy controller, by design.

But the cartridge SD has EXDOS and its own SDEXT, what will happen if I connect an EXDOS card with floppy controller, or Saint's combined RAM/ROM/SD card what will probably contain an own EXDOS and its SDEXT like extension ?

Can anybody say it ?

Will these be "use by itself alone" devices ?

Any EXDOS extension can be combined, only limit: Z are the last drive letter 

Okay, it is then the hardware side and the EXDOS extension software side,

but what will be with the multiple and different EXDOS ROM instances ?

I will have to reduce to only one EXDOS ROM instance in my system ? And if my system will have a WD floppy controller chip, I will have to reduce to a WD compatible (original) EXDOS ROM, and when I have no WD chip in my system, I will have to reduce to a single EXDOS ROM without WD chip support ?

In the other side,

what have been with the quick(advanced) ram test(detection) side of the saint's combined extension ?

Will it work plugging into a stock machine, finally ? Or have I to burn quick test to the cartridge or the mainboard ?

The fast test is mapped into the onboard flash on the expansion. Currently there is no flashing software (I haven't had time to write it), so you would have to flash any additional ROM's manually. However it wouldn't be difficult to write a flashing program if someone wanted to do this...

I have a FLASH program. The best way extend this to universal FLASH program.
Your card use which type of FLASH chip?

I decode the cartridge address space... ah, which does mean of course, you cant run a cartridge as well as this expansion. I designed this as a "plug and play" device for any Enterprise, which will give you RAM / ROM and SD card, fast RAM test and latest BASIC.

Flash is an SST39SF040

I decode the cartridge address space... ah, which does mean of course, you cant run a cartridge as well as this expansion.

Cannot somebody change the decoding of the expansion ROM to other places in those cases, when they have already a quick test in the cartridge or in the mainboard rom ?

With jumpers or some programming of something in the card ?

I also want to have both!