[Coco] Noob 6809 ASM programmer looking for tips

Robert Gault robert.gault at att.net
Sat Dec 26 08:59:22 EST 2015

One of the very convenient tools for creating projects on a PC for use on a Coco 
was created by Roger Taylor. You can look at and obtain trial copies of the 
RainbowIDE at
Roger's latest product is the PhoenixIDE

I happen to like the RainbowIDE not having experience with PhoenixIDE.
These packages make it easy to create Basic or ml programs using a wide screen 
editor. You can install several assemblers that can handle pure ml or OS-9 ml 
These packages work with the MESS emulator and can provide assembling code, 
placing the results on disk images, and starting the Coco MESS emulator for 
immediate testing with a single mouse click.

If you want to do all of your assembly work on the Coco, you should consider my 
patch to Tandy's Disk EDTASM for programs that run with the Basic ROMs.
If you are interested in programming under OS-9/NitrOS-9, the project disks 
contain the assemblers asm and rma.

Other tools can be found at
A selection of sites containing good info can be found on the Internet, one being


More information about the Coco mailing list