• VirtualBox - Oracle
• z80pack - Udo Munk
• Virtual Kaypro - Douglas Miller
• Virtual Horizon - Dave Dunfield
• External Links
• References

In computing, a virtual machine (VM) is the virtualization/emulation of a computer system. Virtual machines are based on computer architectures and provide functionality of a physical computer. Their implementations may involve specialized hardware, software, or a combination. [1]

VirtualBox - Oracle

I usually like to work with Parallels Desktop on my Mac. Here, you can set up a virtual DOS wonderfully, but ... Parallels only works on the Mac and not on Windows.

So, I am using Oracle's VirtualBox with both OS's, Windows 10 and macOS. This virtual DOS machine (VDM) resides in the cloud and can be used by both systems.

You just have to give the synchronisation a little time, you can't jump back and forth. So first close the VDM properly on one computer, then force the synchronisation. Only then can you open the "same" VDM on the other computer. Anything else will only cause synchronisation errors.

Floppy disk drives can be easily integrated as images in IMG format. You can edit the IMG format directly in the macOS Finder. The only thing that is really annoying under macOS are the many hidden files, including the trash. After completing file operations, you have to make them visible (shift cmd .) and delete them.

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z80pack - Udo Munk

(CPMSIM, ALTAIRSIM, IMSAISIM, CROMEMCOSIM)

Follow this link.

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Virtual Kaypro Computer - Douglas Miller

Follow this link.

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Virtual Horizon - Dave Dunfield

Follow this link.

• Oracle Virtual Box

1. (↑) Wikipedia: https://en.wikipedia.org/wiki/Virtual_machine