XEROX was contributed by Mike Goetz of NY. single sided-single density copy = 40 seconds single sided-double density copy = 70 seconds requires 4mz operation CDOSSAP, CDOSFAP with modified UCAT, and CDOSCOPY were contributed by Trevor Marshall from 'down-under' Australia. FDCBIOS, and FDCBOOT were extracted from the CPMUG Library and modified to operate properly with Persci single arm voice coil disk drives by Mike Goetz and Hank Kee.