7.
Autoguider commands
The network interface is described in the accompanying document WHT-AUTO-1
"Network interface command specification". The commands are equivalent to the
low level user commands described below in section 7.1.2. A convention has
been adopted that each command has a three letter mnemonic, for example FLD for
the Field command. One copy of this Forth word exists in the NETWORK
vocabulary and another with the same name in the USER-VOC vocabulary. Both
commands call one Forth word, with the same mnemonic prefixed by AG, so that
the actual field routine is AG-FLD, defined in the AG vocabulary. This makes
the user vocabulary interface have the same actions as the network interface,
and thus the network interface has the same functionality. The difference is
that the user vocabulary version displays output onto the engineering terminal.
Note that these commands are NOT available in the sealed vocabulary for normal
use. You have to type ENGINEER to enable these commands.
These commands are in the sealed vocabulary and are available when the software
finishes loading. The high level commands are designed to simulate the
forthcoming ICL commands. Both these and the Network Application interface use
the same set of functions, so there is no gain in functionality by using this
interface, though until ICL procedures have been written, these will be much
friendlier to use.
Note that it is possible to use both the engineering terminal and the network
interface at the same time, with possible unexpected results.