fachat/XD2031 — pull request #131 by Edilbert (2014-02-11 11:22:04+00:00)
Title: enable multiple units directory display like LOAD "$"

Enhance firmware to the capability of displaying the directories of two or more drives.
This simulates the behaviour of the Commodore dual floppy drives, which use to display both directories after commands like CATALOG or LOAD "$".
The changes are fully compatible with existent providers, which display one directory only.