Xref: utzoo comp.sys.mac:15672 comp.sys.mac.programmer:686 Path: utzoo!mnetor!uunet!lll-winken!lll-tis!ames!ncar!noao!arizona!ric From: ric@arizona.edu (Ric Anderson) Newsgroups: comp.sys.mac,comp.sys.mac.programmer Subject: Re: IW LQ problems Message-ID: <5331@megaron.arizona.edu> Date: 4 May 88 21:28:04 GMT References: <852@ndsuvax.UUCP> Organization: U of Arizona CS Dept, Tucson Lines: 26 Summary: IW LQ errors seen here I have seen this exact problem on an ImageWrite LQ here that is directly (as opposed to AppleTalk) connected to a MAC-II. The messages is annoying, but so far I have not seen any evidence of lost data on the print. I did some poking with a line monitor, and discovered the MAC asks for a "SELF-ID" from the printer at start AND end of job. If the end of job response is not back in a very short time (around 4 seconds) the Mac puts up the message. The response always comes, but never until the printer finishes processing the buffer full of data ahead of the SELF-ID request. This usually takes 15 seconds or so if the buffer is nearly full. The Mac is much more patient if the printer is hooked up to the "modem port"; it will wait darn near forever for the SELF-ID response at end of job on the modem port. If your modem port is free, you might try moving the printer to that port and selecting it via Chooser. We don't have MPW, so I don't know what its problem is. BTW: The Self ID request gets a response of the form "LQ". Options is a tring of 1 or more ascii characters, which is comes out as "LQ1" for an LQ with no options installed. The "Apple LQ ImageWriter Reference" (Addison Wesley) discusses this in detail. Let me know what window you throw yours out of; I may want to use it myself.