Looks to me like you need the license file, or else the code is not licensed: http://www.retroarchive.org/cpm/cdrom/EMULATOR/UNIX/Z80PACK/Z80SIM/LICENSE.US
Looks to me like you need the license file, or else the code is not licensed:
http://www.retroarchive.org/cpm/cdrom/EMULATOR/UNIX/Z80PACK/Z80SIM/LICENSE.US