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*
* Mount Table
*
* Each mount structure defines a mounted on device.
* one is allocated for each mount operation.  It is
* used to find the devices sir.
*

* struct mount

 base 0

mdevic rmb 2 device number mounted
msir rmb 2 pointer to sir
mnodep rmb 2 pointer to mounted on fdn

MSTSIZ equ * mount structure size
