home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
OS/2 Shareware BBS: 21 PDrivers
/
21-PDrivers.zip
/
bidi.exe
/
parallel.hlp
(
.txt
)
< prev
next >
Wrap
OS/2 Help File
|
1999-11-16
|
7KB
|
170 lines
ΓòÉΓòÉΓòÉ 1. Parallel Port Properties ΓòÉΓòÉΓòÉ
Use this window to display or configure the properties of the parallel port.
It will allow the user to adjust the timeouts for errors or terminating the
connection to the printer.
Port name : This field shows the name that identifies this port.
Advanced : Display advanced parallel port settings dialog.
OK : Save any changed information and close the window.
Undo : Reset all values to their state when the window was opened.
Default : Reset all values to their state when the system was installed.
Cancel : Do not save changes and close the window.
For a detailed explanation of other fields, select from the list below:
Timeouts
Share access
Advanced Properties
ΓòÉΓòÉΓòÉ <hidden> Timeouts ΓòÉΓòÉΓòÉ
These fields set the timeouts that the parallel port driver uses to recognize
errors or terminate the printer connection.
Print : The amount of time elapsed before the parallel port driver decides that
an error should be returned when communicating with the printer. Default is 45
seconds.
Job : The amount of time to wait after a job has finished before terminating
the connection to the printer. Default is 180 seconds. Only works with
bi-directional printers.
Query : The amount of time to wait after a query has been sent before
terminating the connection to the printer. Set this to 0 to disable closing
the port between jobs. Default is 300 seconds. Only works with bi-directional
printers.
Select the up or down arrow to adjust the number of seconds.
ΓòÉΓòÉΓòÉ <hidden> Share Access ΓòÉΓòÉΓòÉ
This check box allows multiple DOS programs to share a parallel port. This
might be required for DOS programs that try to access a port during
initialization.
If the port is already in use, an error appears on the screen. Checking the
Share access check box prevents the error from occurring.
Share access is disabled (unchecked) as the default. If this choice is checked
and you get intermixed output from DOS programs, return it to the unchecked
state.
ΓòÉΓòÉΓòÉ 2. Parallel Port Advanced Properties ΓòÉΓòÉΓòÉ
Use this window to display or configure advanced bidirectional properties of
the parallel port. It will allow the user to view the device ID of the
connected printer and the bidirectional current mode, and to select the bidi
mode and adjust the timeouts for the printer.
Refresh : Update this dialog with current settings of connected printer.
OK : Save any changed information and close the window.
Undo : Reset all values to their state when the window was opened.
Default : Reset all values to their state when the system was installed.
Cancel : Do not save changes and close the window.
For a detailed explanation of other fields, select from the list below:
Bidirectional Mode
Read Timeouts
Write Timeouts
Device ID
ΓòÉΓòÉΓòÉ <hidden> Bidirectional Mode ΓòÉΓòÉΓòÉ
This field displays and allows setting the low-level protocol used to
communicate with the parallel-attached printer.
Current : Displays the current bidirection state of the attached printer.
Compatible is unidirectional. This will also be displayed if a printer capable
of bidirectional communications is powered off.
Selected : The user can select the bidirectional mode to use for the attached
printer.
AutoDetect is the default and will try to put the printer into the best mode
available; first ECP, then Byte, then Nibble mode will be attempted. Any other
selected mode will try only that mode; if unable to use the mode selected then
the printer will be set to unidirectional mode.
Compatible is unidirectional. This will disable bidirectional communications
with the printer and can be selected if problems occur using the printer in
bidirectional mode.
Nibble is the minimum mode that can be selected and still have bidirectional
communications with the printer.
Byte is a mode that can be used with certain bidirectional printers for better
performance.
ECP is the fastest mode for bidirectional printers, but is only available on
certain PCs and printers. The parallel port must be enabled for ECP mode on the
host PC.
ECP RunLengthEncoding is ECP mode with an additional performance boost for some
bidirectional printers, but is only available on certain PCs and printers. The
parallel port must be enabled for ECP mode on the host PC.
ΓòÉΓòÉΓòÉ <hidden> Read Timeouts ΓòÉΓòÉΓòÉ
These fields set the timeouts that the parallel port driver uses for reading
information from the printer. The timeouts are in milliseconds.
Inter-character : The max amount of time to wait for an interrupt indicating
that data has been transferred from the peripheral to the host. This timer
starts when the channel is reversed, and is reset after each transfer from the
peripheral. Default is 64 milliseconds.
Elapsed : The max amount of time a read request will wait before returning to
the caller, even if there is more data waiting to be read. The timer starts
when the channel is reversed, and the timer runs as data is read. Default is
1000 milliseconds( 1 second ).
Note the read elapsed timeout is the maximum amount of time a read request can
take; the read inter-character timeout allows the read request to return
sooner.
Select the up or down arrow to adjust the number of milliseconds.
ΓòÉΓòÉΓòÉ <hidden> Write Timeouts ΓòÉΓòÉΓòÉ
These fields set the timeouts that the parallel port driver uses for sending
information to the printer. The timeouts are in milliseconds.
Inter-character : The max amount of time to wait for an interrupt indicating
that data has been transferred from the host to the peripheral. This timer
starts when the first byte is strobed, and is reset after each successful
transfer to the peripheral. Default is 15000 milliseconds(15 seconds).
Elapsed : The max amount of time a write request will wait before returning to
the caller, even if there is more data waiting to be written. The timer starts
when the first byte is strobed, and the timer runs as data is sent to the
peripheral. Default is 15000 milliseconds(15 seconds).
Note these write timeouts are only used internally by the port driver when in
bidirectional mode. The parallel port properties settings dialog's Print
Timeout is the timeout used when returning write failures to applications.
Select the up or down arrow to adjust the number of milliseconds.
ΓòÉΓòÉΓòÉ <hidden> Device ID ΓòÉΓòÉΓòÉ
This scrollable field displays the IEEE 1284 device ID string returned by the
printer.