Digital-Research-Source-Code/CPM OPERATING SYSTEMS/CPM 68K/1.0X SOURCES/v103

cc     - is the main driver.
cpp    - is the 'c' preprocessor.
parser - equivilent to the c068 pass.
cgen   - equivilent to the c168 pass.
as     - is the 68000 assembler.
lo68   - is the 68000 loader.

clib - contains compatibility routines and include files.
libe - ieee floating point software implementation.
libf - fast floating point software implementation.
misc - includes the c68 startup file and the termination file '-g' flag.
util - contains the archiver, namelist, and s-record generating programs.
doc  - contains the current compiler documentation.

By defineing DRI you should get most of your changes for the compiler, and
loader, and a few of the assembler changes.