johnt@meaddata.com (John Townsend) (11/29/90)
I need help with some problems I'm having with getting my Sun workstation and
HP-48 to speak Kermit to each other. I am using the HP IBM PC cable kit, and
haven't had any trouble at all on the PC. I had to get a M-M gender bender
to connect to the Sun's ttya port. Do I need a null modem too? I'm told that
the Sun is wired DTE, and from the pin diagram on page 39 of J.D.'s Handbook
it appears that the HP-48 is wired DTE too (the transmit signal on pin 2 of
the DB-25 is driven by the HP-48). However, the little success that I've had
has been WITHOUT a null modem. That is, I have been able to send and receive
strings with XMIT and SRECV on the HP through /dev/ttya on the Sun, though I
usually lose characters going from the HP to the Sun. Kermit, however, totally
croaks. Frequently I get an "unable to condition line" error, and when I do
get a transfer started, it either times out or hits the retry max. One thing
I have noticed is that the HP's buffer fills up with garbage when I attempt
Kermit transfers and doesn't get emptied.
If you have any suggestions, please let me know.
--
John Townsend Internet: johnt@meaddata.com
c/o Mead Data Central UUCP: ...!uunet!meaddata!skibum!johnt
P.O. Box 933 Telephone: (513) 865-7250
Dayton, Ohio, 45401jmorriso@fs1.ee.ubc.ca (John Paul Morrison) (12/01/90)
Here is how to use kermit on a Sun (3/60, SPARC etc) since I have seen people with problems. Connect your HP cable to one of the ports on the back of your Sun. There should be 2 serial ports. You will need a gender changer. That's the simple part. You _must_ have read/write permission to the file /dev/ttya or /dev/ttyb, whichever port you are using. If you do not have root priveleges, then whine to whoever does. There is no way around this. If you have ckermit, then type ckermit -l /dev/ttya -b 9600 There it is. It's really very simple. You do not need null modem cables, additional pins cross connected or anything. If the cable works on your PC, it will work on a Sun.