This was my 1984 adaptation of UCSD Pascal II.0 to run on top of a typical CP/M bios.
The theory of operation is outlined in
Theory of Operation
The source files for the stub of the UCSD SBIOS, a dis-assembly of the real Z80 interpreter, and other files needed to roll your own system are in
The UCSD Pascal disks are not supplied in this archive. Clarence Wilkerson