In XF assembler. Once built, you have a very basic, unpatched MVS 3.8 BSP system.

Does it work? Yes.
Is it awesome? Indeed.

Oh wait, the macro library is included, too!

enjoy!

moshix
May 2024

PS: You can find the XF assembler to build this source at: https://github.com/moshix/IFOX.