Vortex Para Plus
Para Plus is a program for transfering software between CP/M and MS-DOS(1986,87) from Vortex.
Para Plus is the newer Version of Para which only works under CP/M 2.2.
Para Plus was distributed on a single 5.25".
The software was intended to be used with the Vortex line of disc drives.
For its time Para Plus was very advanced, and the manual is very comprehensive.
Para Plus also makes it possible to define a custom disc format, and thereby transfer data between the numerous CP/M discformats of the time.
The manual describes the low level (I/O Ports, firmware) use of Vortex disc controlers.
The manual mentions a Harddisc and tells what ports are used for the Vortex Harddisc.