The Computer History Simulation Project
ChunKing writes "The Computer History Simulation Project is a loose Internet-based collective of people interested in restoring historically significant computer hardware and software systems by simulation. The goal of the project is to create highly portable system simulators and to publish them as freeware on the Internet, with freely available copies of significant or representative software. I can't wait 'til someone fixes me an OS/390 emulator to remind me of the days when I used to be an Ops Analyst for a major bank..."
And yes, my Atari ST nostalgia was revised by one of the truly great emulators around then, PacifiST. Nowadays the best emu would be Steem - try it! Little Green Desktop has applications to use
it's in my head
There already is a S/390 emulator... now all you need is the OS... or you could be daring and try Linux on it.
Hercules is an S/370 etc. emulator, it does not emulate OS itself. It's complicate to run recent OS versions on Hercules for legal reasons, the operating system is usually licensed to particular machines.
Yes, yes you will! :-)
This is where I found an emulator that works very well: TRS-80 Emulator Web Site