Thanks again for all of the great suggestions to my "getting started" questions. I've already got a perfect cable in hand and working with TEXT and TELCOM connecting to HyperTerminal on my Windows PC. That alone has saved me so much manual work. I can easily send from PC->M100 BASIC code saved as text/ASCII as a .DO file and then copy/paste right into BASIC, as long as the line numbers are respected between the copy and target basic file.
I have a REX# on order, and should be good until stock on Backpack drives is replenished. I have searched around and can't really seem to find a good, comprehensive software archive for the M100 and related. For example, the TRS-80 Color Computer has a very good archive with hundreds of titles in disk, cassette and ROMPak formats, with heaps of books, documents and documentation. I am having trouble finding something like that for the M100. Is there a copyright issue, or is the CoCo user base just simply more active? Thanks in advance.