Here's another M100 on eBay. This one for $69.96. Looks like it has the SuperROM, if I am correct that the SR has the rainbow ribbon. It is not active when the M100 is powered up.
https://www.ebay.com/itm/Radio-Shack-Tandy-TRS-80-Model-100-Portable-Computer-with-Manual-Cass-Cable/123122384767?hash=item1caaaa7f7f:g:ysAAAOSwQeha8b5q God Bless, GregS <><
