[Coco] NitrOS-9

[farna at amc-mag.com]

Found my issue with a Google search! Mozilla dropped DTP support 
entirely sometime in 2021 (Firefox 90 and above). So I had to install an 
FTP program.

The files in the MaltedMedia CoCo Archive are still a bit... confusing. 
"Mastering OS-9 on the Tandy Color Computer" is found under 
MANUALS/OS/OS9. There is also an "OS-9 Quick Reference and Programmer's 
Guide". The QRG would be easier to re-write, but I don't know how useful 
to a beginner. Maybe add a "Getting NitroS-9 loaded and running" section 
to it would make it good enough?

For those looking for "Tandy's Little Wonder", the PDF copy under BOOKS 
is the latest edition. The one under MAGAZINES is the original. All the 
.PM4 and SOURCE documents in both locations are for the original, not 
the updated version. I think I updated it in 2009...