Eventide ARGUS 5000 - Page 140

sent to simulate turning the knob will be ignored and, of course, you will never receive
a sequence indicating that the knob has been turned or pressed.
Information can be placed on the Argus screen by sending serial data to the selected
Argus port with the appropriate RS-232 parameters. The input port (A or B) and the
\^j baud rate, parity, and number of stop bits are selected at the Argus using the SETUP
mode. The first two pages of SETUP determine if the dedicated terminal mode will
be used, and its RS-232 parameters. The on-demand terminal mode is selected on the
ADAPTER page of SETUP, followed by its RS-232 parameters. Of course, data from
the external device must conform to the parameters selected. There is no provision for
remotely changing this SETUP information. In particular, there is no "autobaud" or
similar feature at the Argus end.
The terminal mode uses the "software handshake" (XON [$ 11 ]/XOFF[$ 13]) protocol.
It is possible to overrun the Argus input buffer by ignoring the XOFF command.
XOFF is sent when there is space for 10 bytes in the queue, and XON is sent when
there are 10 bytes left in the queue. Since some escape sequences can exceed 10
characters, be sure that either your program can respond to XOFF while you are
sending an escape sequence, or that when sending parameterized sequences there is
; , sufficient space to receive them completely. The Argus input buffer is 1024 bytes.
Operations such as scrolling and some graphics operations take considerably longer
than one character time. Note that while the Argus SENDS the XON/XOFF sequence,
it isn't set up to RECEIVE XOFF characters. At most, the Argus sends only a few
characters in response to a data request. If you avoid sending the request unless you
have room to receive the reply, this won't be a problem.
The Argus can go into terminal mode by two means. If the LRN in setup is selected
as "ASCII PORT A" or "ASCII PORT B" then terminal mode is the only operation
(besides setup) which the Argus will support. This is referred to as the "dedicated"
terminal mode.
If a valid LRN is selected and the adapter type is selected for "AUX. PORT. B" in
SETUP, then the Argus will operate normally until "info" is hit two times with no
selected object. At that time, the Argus will enter terminal mode with a single-line
^J prompt at the bottom of the screen (PUSH "INFO" TO EXIT). When "info" is hit the
Argus will leave terminal mode and return to the map display. If "AUX" is hit three
times the Argus will leave terminal mode and go into the main menu page. (If the
July 1999 Argus 5000/7000 Ver. 5.xx Reference Manual Part#141003 135