We're now actually compiling CODEGEN.SLC to CODEGEN.COM using SLC.COM, TASM.EXE and TLINK.EXE. All text in the yellow section is DOS output.
executing "slc codegen" via DOSCMD...
You can see the source of CODEGEN.SLC here.
Some examples if you're not sure what to input:
a + b
(a * b) - 5
a + (b - (c * (d / 3)))