Re: Połączenie przez LPT

Hannibal napisał(a):
> Czy ma ktoś doświadczenie przy robieniu takich połączeń dwóch komputerów ???

Już któryś kolejny raz pada takie pytanie. Ponieważ temat jest bardzo
ładnie sformułowany, przez co dobrze się go będzie szukało w archiwum,
więc wkleję helpa od "Total Commander" jak to zrobić w tym programie nie
bawiąc się protokołami w systemie. (niestety po angielsku).
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PORT connection to other PC through the parallel port

The PORT connection through the parallel port allows to transfer data
between two computers in the same room over a special parallel cable.
This cable can be found in most computer shops under the name
"Interlink/Laplink parallel cable" or "parallel cable for direct cable
connection". It allows a transfer rate of about 50kB/sec. The function
therefore cannot be used as a network, but is meant to synchronize data
between two machines (e.g. a desktop and a notebook). You need a pair of
network cards for a permanent connection.

Important safety instructions - please read:

1. You need a special cable for the parallel port cable connection! This
cable has crossed data lines! Normal parallel extension cables may
damage the parallel port(s) if you connect them to your computers! You
need a 4 bit (not 8 bit cable). See below for the connections.
2. Only connect the computers when they are turned off! Contrary to USB,
the parallel port is not suited for hot-plugging!
3. There is always a danger of the destruction of the port by static
electricity. Therefore please touch the PC case before connecting the
cable. Avoid rubber soles on a carpet floor.

4. Only connect two parallel ports, not a parallel with a serial! The
parallel port on the PC has 25 holes (not pins). The cable must have two
plugs with 25 pins each.
5. You should not use the parallel port connection with other devices on
the same line, like a dongle, ZIP drive (TM) or an external harddisk.
Total Commander blocks all port access for the whole duration of the
connection!

Starting the parallel port connection

1. Turn off both machines, connect them by parallel cable, and turn them
back on.
2. Start Total Commander on both machines. You only need 1 licence if
you are the only user.
3. On both machines, select 'Net' - 'PORT connection to other PC'.
4. One machine will act as a server, and one as a client. You will be
working on the client, while Total Commander cannot be used on the
server during the connection. Therefore select 'Server' on one machine,
and 'Client' on the other.

5. If your computer has multiple parallel ports, Total Commander will
ask for the port which you want to use. Choose the port to which the
parallel cable is connected.
6. The connection is now established. It works similar to an FTP
connection, i.e. you can now upload, download, delete, rename, view, and
edit files, but not execute programs. Furthermore, you can use
'synchronize dirs'.
7. Close the connection on the client (Disconnect) and server (Abort).

You can also start a port connection using a command in the button bar,
start menu, or Ctrl+D menu (client only):

The command would be
cd port://lpt1/c:/subdir1/subdir2

Important: Subdirectories must be separated by forward slashes "/"! The
reason is that Total Commander internally uses the FTP functions for the
connection.

If you want to transfer data from a Windows machine to a machine without
Windows (only plain DOS), e.g. to copy a system, you can use the
standalone server for DOS. You can find it on our homepage,
www.ghisler.com, on the 'addons' page. Although this server runs on
Windows 95/98 and Windows 3.1 in a DOS box, you shouldn't use it there
because it accesses the port without any protection from other programs.
Furthermore, it's slower and doesn't support long file names.

Usage of the drivers for the parallel port

Total Commander uses the driver cglpt9x.vxd for the parallel port
connection under Windows 95/98/ME. It is loaded automatically when the
connection is started, and removed at the end. Under Windows NT/2000/XP,
the driver cglptnt.sys is used. To load this driver dynamically, you
need administrator privileges on that machine! If you don't have these,
or want to work under a user account for security reasons (recommended),
you can have the driver loaded automatically at system start. To achieve
this, you or your administrator have to call Total Commander from an
administrator account like this:

Totalcmd.exe /installdriver
To remove the driver, use the command
Totalcmd.exe /removedriver
This will only work on Windows NT 4 and Windows 2000, respectively! The
driver implements a so-called 'Parallel port class driver'. It was
developed by us, and contains functions to block/unblock access to the
parallel port, and functions to send individual characters and even
whole blocks. It allows user mode programs to gain exclusive access to
the parallel ports, but not to other ports.

Under Windows 3.1, Total Commander accesses the port without a driver.
This means that other applications are not blocked from accessing the
same port! Therefore don't try to print to that port during the
connection, or to access devices on that port.

Troubleshooting

If the port connection fails, try the 'test' mode. To use it, select
'test' (instead of 'client' or 'server') on both sides! Total Commander
will then send a test pattern over the parallel port, which can be used
by the receiving end to detect if the cable is OK or not. Both ends need
to report that the cable is good, because each end can only test its side!

You may get one of the following results:

1. Both sides say 'the cable is good', but the connection still fails.
Solution: Your cable is probably too long or the shielding isn't good
enough. You probably need a shorter or better cable. Cables up to 5-10
m/yards should be OK.

2. Error 'could not load driver'. Solution: Make sure you have the
cglpt9x.vxd in the Total Commander directory (Win95/98/ME), or you have
the cglptnt.sys installed (Windows NT, 2000 or XP). Another possible
reason: You have tried to create a shortcut to Totalcmd.exe on the
desktop, but have copied the program instead! To fix this, delete the
false shortcut and create a new one by right clicking on the desktop
(new->link).

3. No reply at all. This can have several reasons: The wrong cable (not
with crossed lines, but 1:1 connection), connected to wrong port, or
non-standard ports. Solution: Make sure you have connected the cable to
the correct ports (parallel, not serial), and you have chosen the right
port number (LPTx). If this doesn't help, try a different cable!

4. Total Commander detects that data is received, but shows a receive
error. Reason: Wrong cable (wrong lines are connected), or a pin may be
broken. Total Commander will show which connections do not work.

Unfortunately we cannot offer any support for non-functioning parallel
port connections.

The cable needs to have at least the following pins connected:

2 <----> 15
3 <----> 13
4 <----> 12
5 <----> 10
6 <----> 11
15 <----> 2
13 <----> 3
12 <----> 4
10 <----> 5
11 <----> 6
25 <----> 25 (Ground)
Received on Thu Nov 18 21:50:16 2004