mlw@NCSC.ARPA.UUCP (03/27/87)
Thomas: You may be suffering from a handshaking problem. If you are running with DTR hardware handshaking at a high (9600-ish) baud rate, you may lose characters due to one being in route (from the PC's perspective) when the printer drops DTR. There's no way for the computer to know whether or not the last transmitted character was received or not. Possible solutions include (1) using a print utility that uses XON/ XOFF and changing the LaserJet to using that handshake, (2) putting a printer buffer in the line, and (3) lowering the transmission speed. The setup I had used (2) -- we have a Printer Optimizer (256K) from Applied Creative Technology that has performed excellently. I hope this info is accurate and helps. Good luck. Mark L. Williams (mlw@ncsc.arpa)
P364@QZCOM.BITNET.UUCP (03/30/87)
We use xon/xoff and 19200 and never lose a single bit transferring data from our HP9000/540 computer to the Laserjet+.
bam@bigbang.UUCP.UUCP (03/31/87)
The symptoms you describe do sound like a handshaking problem. Assuming that your cable has been built properly, the AT or XT will drive the Laserjet just fine with X-ON/X-OFF flow control. IF your printer is on com1: MODE COM1:96,n,8,1,p will configure the serial port correctly. The 'p' sets the port for printer handshaking. If that still doesn't work, check the switches inside the printer and make sure everythng is set as per the factory. Now if that doesn't help, send me a private note and I'll send you cable pinouts. I tried to reply directly but my mail bounced as undeliverable. Bret Marquis bam@bigbang.cts.com