Hi everyone
In case this is new to anyone I'm posting links to Dave Dunfields Software. Much of it is now free to download. In particular I have just found the source for a 6809 monitor which needs no ram of any kind to operate, just ROM and UART, maybe I can get my old system working again with this before I crank out the logic analyser on it. Although they are native DOS programs I have just built all the assemblers and other tools under DosBoxX on my Linux Mint PC.
This is where the MONITORS and XASM archives were found
https://dunfield.themindfactory.com/dnldsrc.htm
Notable in here is his release of 40 years of source code
https://dunfield.themindfactory.com/dnld.htm
And here is a link to his 6809 systems
http://dunfield.classiccmp.org/d6809/wstn.htm
Although not the primary site, this page has some useful descriptions of the softwares.
http://www.grifo.com/SOFT/uk_DDS.htm
ht David.