About this setup
This machine has both a 44-pin IDE port as well as a CF slot onboard. I have taken advantage of both by installing a 16 GB disk-on-module as well as an industrial 4GB CF card for 20GB of total storage. Windows XP is installed on the 16GB drive and a stand-alone version of DOS 7.1 is installed on the CF card on a 2GB FAT16 partition. I used the other 2GB of space to hold a Ghost image file of the XP installation as well as a separate Ghost file of the DOS installation in case you ever need to restore this machine to the way you bought it from me using Ghost (Ghost32 also included on that Restore partition).
I installed System Commander 9 as the boot loader and upon turning the computer on, you get the choice of booting into either XP or DOS. I have it configured so that XP and DOS each independently get a C-drive letter as their main drive. Note that the DOS and Restore partitions are visible when booted into XP (as drives D and R).
I settled on version 7.1 of DOS since it does support small USB flash drives as well as USB optical drives so long as you have them plugged in prior to powering up the system. An external drive will be detected as Drive D when in DOS.
In Windows XP, all drivers are installed as is Google Chomre v49, Firefox v52, .NET 2.0 framework, and Visual C++ 2005 Redistributables.
In DOS, I configured SBEMU to IRQ7 for Soundblaster support. Games that I have tested and work great include Doom, Duke Nukem 3D, Wolfenstein 3D, Epic Pinball, and King's Quest. However, a lot of games won't work including a lot of older 3D platformers. Bottom line is your mileage for DOS gaming on here will vary.
Note that no CD/DVD drive is included (but that most external USB-based solutions are compatible).