CP/M 2 Emulator

Not all functions under CP/M 3.x are compatible to those of CP/M 2.2. Particularly direct BIOS calls may cause crashing CP/M 3.x. Also the BDOS function 27 — Return address of allocation map — may cause incorrect results. (User of TURBO-PASCAL 3.x know the problems determining the free disc space.)
Use this RSX if you are running programs making problems as described above. After installing the RSX CP/M 3.x acts like CP/M 2.2.

Here the source files:

♦	Main program	The program checks whether there is room for the RSX in the COMMON memory area and installes the RSX in case it is
♦	RSX	The RSX must be combined with the main program
♦	Deleting program	This tool deactivates the RSX