GeoRAM System 2.0 (64er Magazine - December 1992 Issue, Page 36) is a RAM Disk utility & machine code monitor for the Commodore 64.  With this utility you can create a 2015 block storage device that can  be used from BASIC 2.0. 

After the program loads and runs, it will door a warm reboot.  After the reboot, issue SYS 56832 to activate the software.  The built-in help can be access by typing "HELP" at the > prompt