2 Aug
2006
2 Aug
'06
12:30 p.m.
jim stephens wrote:
Chuck Guzis wrote:
No. I am assuming *no* protocol! I.e. the source machine just
*pushes* bytes out the parallel port. Leave it to the receiving
device to figure out how to get them *in* and some "external"
mechanism to verify that the transfer was error-free (e.g., the
MD5, CRC, "send it twice" ideas).
The whole point of my proposal was to not require *anything*
on the source machine other than the ability to cat(1) to
/dev/lpt in some fashion. All of the work is done on the
other end -- by the recipient. And, you only need *one*
box with that capability (hardware/software)... presumably
also having the ability to move the file that it receives
out to the network, onto other storage media, etc.
On 8/2/2006 at 11:32 AM Don Y wrote:
I have a "vintage" IBM PS/2 data migration facility box with appropriate
dates, so it is
not too off topic. Anyone out there with a recipe or howto pointer to
do this with various
os varieties? Say linux 2 linux, or linux to dos?
Also, I do not believe that the output to the printer port that Don
suggested assumed the
protocol that the parallel port data coupler uses is available. Unfortunately, you then need *one* box with
hardware suitable
to capture the incoming bytestream (i.e. *not* an SPP).
I know this is a vintage list, but at a minimum, PS/2-style bidirectional
parallel ports have been around for a very long time, so this
shouldn't be
a problem. Even if you had an old XT, printer and monochrome adapter
cards
can usually be modified to operate in bi-directional mode.
After that, it's just the cable and a bit of software on the receiving
side.
To fork the thread, I would be interested in whether
the SCO parallel
drivers might
support the parallel port in such a way as to allow such coupling,
(reads get data from port that is).
This is what I was avoiding!
Also what is required to do this simply or other wise
on Linux
(mentioned above).
Even better, is there a small program to do this to a dos box, that can
be used
on dos / old windows boxes.
Laplink had cables for the serial port, I don't recall if it had a
parallel version
that was reliable, as far as dos to dos data transfer.