Get explicit free memory

EazyLink Server, V5.0

This request command will return the current free memory of the specified RAM card on the Z88 (in bytes) to the Client. The figure returned will be accurate to 256 bytes. The argument is "0" for :RAM.0, "1" for :RAM.1, etc. Specifying a "-" means :RAM.- (all RAM cards).

The actual (long integer) number is sent as an Ascii string, eg. "234496" for 229K free memory.

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Client                    Server                Action
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<ESC "M">                                       Request for free space in
<DeviceNumber>                                  RAM Card
<ESC "Z">
waiting               <-  <ESC "N">
                          <Free Memory>         Free memory in bytes
                          <ESC "Z">
                                                or
                          <ESC "Z">             RAM Card not available.
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