IBM 3164 ASCII Manual page 135

Chapter 5. Programming considerations
38
Pacing for auxiliary port (continued)
39
Trace
40
Auxiliary Input Data
41
I
Print Key OptIon
42
Time Fill Character
43
Line End Character
5-48
If pacing is specified for the Inbound data stream, the display station
sends the XOFF signal to the auxiliary device to avoid a buffer overrun
When the auxiliary device receives XOFF. It must stop the Inbound data
transmission immediately After the auxiliary device receives XON
It
resumes the Inbound data transmission
I
3t64
I
Inbound Data Stream
J
I I
Auxiliary
I I-----------------~l
Device
Inbound Pacing
(XOFF/XON)
Pacing is not possible if the DC3 character IS used for a line turnaround
character.
This parameter is used to select the type of data traced when the Trace
key is pressed.
In trace mode, the inbound/outbound data of the main port can be
transferred to the auxiliary port without disturbing communications with
the host system. One of the following can be specified.
• inbound data
• outbound data
• both inbound and outbound data,
If pacing is specified for both the inbound and outbound data streams in
PRTS mode, only the outbound data is transferred to the auxiliary port.
This parameter is used to determine the handling of the input data stream
from an auxiliary device.
• If the Ignore parameter is specified, the display station
unconditionally discards the input data from the auxiliary device,
• !f the Passthrough parameter is specified, the input data stream is
divided into several blocks before being sent to the host. The
DLE.DC2 sequence is appended at the beginning of the data block,
and DLE,DC4 at the end,
I
::~s
optIon IS used
to
select one of the following functions of the Print
• Print Page
• Print Screen
• Print Viewport,
This parameter is used to determine the number of time-fill characters
(DELs) to be sent to the printer at the end of each print line,
This parameter is used to select the line end character (CR. LF or CR)
that is sent to the printer whenever the one print iine is terminated before
reaching the right edge of the viewport (for Print Viewport), the screen
(for Print Screen), or the page (for Print Page/Message/Line). If the
printed data length reaches the rightmost column of the viewport (for
Print Viewport), the screen (for Print Screen), or the page (for Print
Page/Message/Line), the Line End character (No LE, CR.LF, or CR) is
determined by the Print EOL Option,
(