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Conference rocks::uk_digital

Title:	Working for Digital in the UK
Notice:	DIGITAL Stock quote: $35 1/8 on 10/01 at 18:04 eastern.
Moderator:	WOTVAX::HILTONo.dec.com::hiltong

Created:	Thu Sep 10 1992
Last Modified:	Fri Jun 06 1997
Last Successful Update:	Fri Jun 06 1997
Number of topics:	1443
Total number of notes:	35591

1417.0. "LA400 ESCAPE SEQUENCES" by CHEFS::GALLAGHER_D () Wed Apr 09 1997 18:44

    I have put this rather strange query into this conference because I
    don't know what else to do with them!  I would be grateful for any
    help.
    
    ======================================

    When my customer's (a major UK SI partner) application outputs a
    message using a printer, it uses an escape sequence sent to the printer
    to ensure that the message has been committed to paper (i.e. not just
    stored in the printer's buffer) before the message is taken from the
    transmit queue.

    The escape sequence used is CSI  0 c  (request for product
    identification).

    Can anybody please confirm whether this is supported for the LA400
    printer? (It is mentioned in the 'request product information'  section
    of the control and escape sequences chapter of the LA210 programmers
    reference manual).

    If anybody can, it would be extremely useful, as we have a client who
    is anxious to purchase more printers!

    Thanks very much
    David Gallagher

T.R	Title	User	Personal Name	Date	Lines
1417.1	Try printing conf.	CHEFS::TREVENNOR_A	A child of init	`Wed Apr 09 1997 21:41`	8
	David, You may get an answer here but I think it more likely that you would get a faster response in ONTIME::POSTSCRIPT_PRINTING where the printer guys hang out in droves...... pree keypad 7 now to add. Regards Alan T.
1417.2		TRUCKS::PARMAR	I'm so fast - I'm even fast asleep	`Thu Apr 10 1997 09:39`	29
	re .-1 ONTIME::POSTSCRIPT_PRINTING is the wrong conference for a non-postscript device like the LA400. The better conference would be HUMANE::ANSI_PRINTING This conference discusses the non-postscript printers. re base note: As to whether or not <CSI>0c is supported or not on LA400, my guess would be a yes. All corporate printers support these DSR (Device Status Request/ Report) sequences. I would therefore assume that the LA400 also does. One point to bear in mind is that just because you send a <CSI>0c to the printer does not mean that there isn't anything in the buffer. In general the buffer would be empty if you sent this sequence at the end of your text. However, you could get into certain circumstances, especially with bespoke printer drivers, that would mean data was in the buffer when <CSI>0c was received. Some of the internal printer algorithms suggest that responses to DSR's should be sent even if there was data in the buffer. They also suggest that it is acceptable for the printer to have sent an XOFF to the host and still be able to receive and process the DSR sequences. So just because you get sent a Device Attribute back does not necessarily mean that there isn't any data remaining in the printer. It all depends upon how the internal parser of the printer is written. Ravi
1417.3	thanks very much	CHEFS::GALLAGHER_D		`Thu Apr 10 1997 15:19`	4
	Thanks very much for your responses. regards David Gallagher
1417.4		THEFT::MICK	Crisis, What Crisis?	`Thu Apr 10 1997 15:33`	5
	Yes, <CSI>0c is supported on the LA400, well it works on the one I've got! Regards Mick.
1417.5	Printing Systems Business	CHEFS::BETTS_C		`Fri Apr 11 1997 12:19`	15
	David, I trust you now have an answer to this particular query, if you have any similar problems please do not hesitate to contact us in the PSB (Printing Systems Business) and we can channel this through to our technical guys. Additionally should you or your customer require any assistance in purchasing more printers, I will be only to happy to help. Chris Betts Printer Sales Specialist 0831 487450 Dtn 830 6019.