# Mount System Device

> [HTML Version](mountsystemdevice.htm)

_Added February 2016_

This switch allows defining a system logical device that will be searched ahead of SYS:, CMD:, and BAS: 

**\-mntsys dev:=path**

For example:

ashell -i /vm/miame.ini -mntsys asr65:=/vm/miame65/dsk0 log sys:

Assuming the specified path /vm/miame65/dsk0 existed and contained 001004, 002002, and 007006 directories, these would be searched prior to the corresponding dsk0:\[1,4\], dsk0:\[2,2\] and/or dsk0:\[7,6\] directories.

This can be useful in situations where you want to test a new version of A-Shell without overwriting your existing DSK0: directories. 

**History**

2016 February, A-Shell 6.3.1307:  Function added to A-Shell