I have located source code to some of the MM/1 programs I wrote. It is now uploaded to my GitHub page:

https://github.com/allenhuffman/SubEthaSoftware

This includes…

• MiniBanners – ported from CoCo BASIC09 to the MM/1 BASIC by Joel Hegberg (he had an MM/1 and I didn’t)
• MegaBanners – the updated banner program that made use of Joel’s excellent MFONTS library.
• Towel – the EthaWin library disk utility.
• TCWin – my termcap windowing system that simulated many of the CoCo and MM/1’s CGFX text windowing calls. This allowed me to port EthaWin stuff over to OSK and OS-9000 boxes running on terminals. (I even ported it to DOS at one point, but lost all that work in a laptop hard drive crash.)

If you have access to an MM/1, I’d love to know if any of this software can be built and ran.