CPM Emulator

Here is a program to run:

https://github.com/sblendorio/gorilla-cpm/blob/master/binary/gorilla.com

Info on CP/M here:

https://en.wikipedia.org/wiki/CP/M

http://www.classiccmp.org/cpmarchives/

http://www.cpm.z80.de/

http://www.digitalresearch.biz/CPM.HTM

http://gunkies.org/wiki/CP/M

Info on the Z80 CPU here:

https://en.wikipedia.org/wiki/Zilog_Z80

http://www.zilog.com/docs/z80/um0080.pdf

https://www.digikey.com/catalog/en/partgroup/z80/15507

http://z80.info/decoding.htm

https://clrhome.org/table/

https://wikiti.brandonw.net/index.php?title=Z80_Instruction_Set

https://www.ticalc.org/pub/text/z80