mike@PASTEUR.CVM.UIUC.EDU (Michael Trogni) (12/22/89)
I am having problems getting our laser printer (Apple II ntx) to print large Postscript files. Whenever a large file is submitted, with Transcript 2.1, error messages like : zs1: silo overflow error print on the console and the job is aborted. I would gratefully appreciate any help you could offer me.
mackay@CS.WASHINGTON.EDU (Pierre MacKay) (01/05/90)
I have been working on an application which runs the zs1 serial port on a 3/60 with SunOS4 at the physical limit of 960 characters/second continuously for twenty or thirty minutes. Using the ``Posix'' non-canonical interface with the port I have had no problem (Sun does not yet claim POSIX compliance, but they do a darned good job in most places where it counts.) I have been especially satisfied with the performance of the 3/60, since I have had troubles with every other system I have tried to port the application to, including the Sparcstation. On the 3/60 it runs perfectly, but it should be recognized that this application reads without any requirement for handshaking. Your problem probably relates to the need for handshaking, as the laserwriter comes back looking for more data. I believe that the printcap can introduce various forms of delay and padding which might solve the problem. I seem to remember that the recommended Sun printcap involves rows and rows of padding characters. Otherwise, try SunOS4. It is good stuff. Pierre MacKay