There are a few issues to answer. These ADVANTECH mother boards are still available. They have everything built in as far as video, serial and parrellel port, etc. The first ones used a piggy back Flash card. This is obsolete. The next generation used a device called a "disk on a chip." It was a removable IC. The newest version is a DISK ON a MODULE> It plugs into the IDE (hard drive) connector and works just like a hard drive. It can be "found" by the motherboard BIOS. Usually we purchase the 32MB version, load DOS and the machine software and it is ready. There is a special piece of software that formats and loads the necessary software onto the flash card. The hard drive settings are set to none. Same goes for the disk on chip but it has a different version of software.
Now what you should be aware of is that the motherboard does not run the machine. It is used for an interface to you, and as a way to get data to the BMDC board which has its own processor (slow) and actually runs the machine. When you save and load a program, it saves to the Flash card (or whatever device you have) and loads it to the BMDC board. The BMDC even converts your conversational program to G and M code. If your BUSS speed is too high, you will have communication errors with the BMDC. Sometimes I have to turn off caches and such on the motherboard to slow it down.