CCJ1MUNICATI0NS
SECTION 6.8
6.8.6
6.8.7
6.8.8
Buffers
It should be remembered that the HUNTER is fully buffered with
transmit and receive communications buffers, a keyboard buffer and a
virtual screen effectively keeping early information available for
use.
At high receive data rates, e.g. 4800 baud, the receive buffer will
remain full.
If a "stop" is sent to the sending computer (e.g. XOFF
or control
s, sent manually) then the screen display will .ll.Qj;_ stop
immediately, continuing to display the characters stored in the
receive buffer until the buffer empties. If this is fouJJd
undesirable, the most straightforward solution is to reduce the data
rate to 1200 baud.
If 2780 synchronous transmission is used in terminal mode, a block
will be sent if the keyboard has not been operated for 5 seconds.
This does mean that when using terminal emulation in 2780 mode for
"signing-on", there should be no hesitation or typing errors or the
block will be sent unexpectedly! ·
Auto Power Off
Terminal Emulation does not power off automatically. This is for
ease-of-use when operating intermittently with a remote site. If
auto power off were allowed, modems may drop the line resulting in
messages lost, etc.
It is important, therefore, to remember to switch off HUNTER after
using Terminal Emulation.
System Call
User programs can use Terminal Emulation which is provided as system
call number 43 (see section 3.5.3.44 ). Selecting "System" (function
8) in Terminal Emulation will return control to the calling program.
To use Terminal Emulation from Basic, the following is required:
1000 A=ARG(43):A:CALL(5)
Execution will continue aner line 1000.
VER.V09F,
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