USER’S MANUAL__________________________________________________________________
318 _________________________________________________________________ M211322EN-D
7.17 TTY Operation (TTYOP)
This command controls the TTY "chat mode" interface to the host
computer. The command can simulate the typing of characters on the
RVP900 setup TTY. Characters entered in this manner are
indistinguishable from those typed on the actual TTY; hence, whatever one
can do via the TTY, one can also do via this command. The RVP900 sends
all TTY output to whichever stream (TTY, or host computer) provided the
most recent input character. This command is also used to monitor the
graphical data from the special scope plotting modes.
0916-160
The operation codes are as follows:
Any of the following types of data may be output by the RVP900 while the
TTY monitor is running. The order of arrival of each data type is
indeterminate, but all multi-word sequences will always be output as
contiguous words.
Individual "TTY" characters generated by the RVP900 are output in the
low byte of the word, with the upper byte set to zeros.
0916-161
The status of the plotting modes is given in the following word.
0 Sends the ASCII character in the upper byte of the word to the
RVP900 as if it had been typed on the setup TTY keyboard.
1 Allow scope plotting data to be output whenever a plot is
being drawn. All relevant status and data words are output
once upon each receipt of this command. Subsequently, status
and data will be output only when a change has taken place.
2 Disable the scope plotting output data.
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