Leica tps1100 Reference Manual page 8

GeoCOM Reference Manual GeoCOM
an ASCII interface, which can be used to implement applications on platforms,
which do not support MS-Windows.
On the high level, GeoCOM provides normal function call interfaces for C/C++
and MS-VBA to these remote functions. These interfaces enable a programmer to
implement an application as if it would be executed directly on the TPS1100
instrument.
Note: Further on we will refer to a remotely executable system function as a
RPC.
The TPS1100 instrument system software uses a multitasking operating system.
Nevertheless, only one request can be executed at once. This means in respect of
calling RPC's GeoCOM works synchronously only.
On the low level interface the server buffers subsequent requests if current
request(s) has not been finished so far. If the queue is full then subsequent
requests will be lost.
Instead on the high level interface a function call will not return until it has been
completely finished.
TPS1100 - Version 1.05 1-4