Running TASS inside a DOS box to build Rich's 2.7 SBC was getting frustrating compared to the speed of a native assembler. So I ran the TASS source through my translator program, and diffed my binary against Rich's to ensure they were byte for byte identical. The translator messed up formatting in a few places, and changed the extension to .oph, but since the resulting binary is identical I call it a success.

The source is located in my 6502 monorepo on Github https://github.com/Martin-H1/6502/tree/master/SBC2.7

I use Make and Ophis to build it with the command "make release". For now I've left it standalone rather than integrating any of my standard macros or libraries.