The first form shows the current values of all the variables of the memory switch.
The second form shows the current values of the specified variables. If the -h flag is specified, a brief descriptions of the variables are displayed. The -n flag suppresses printing of the variable name.
The third form sets or modifies the specified variables to the given value.
In the fourth and fifth form, the whole memory switch part of non-volatile SRAM is saved to, or restored from the specified file, respectively.
/dev/sram