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- Xref: sparky comp.periphs.scsi:5474 comp.periphs.printers:3323
- Newsgroups: comp.periphs.scsi,comp.periphs.printers
- Path: sparky!uunet!mcsun!sun4nl!relay.philips.nl!philica!adrie
- From: adrie@ica.philips.nl (Adrie Koolen)
- Subject: Re: SCSI Printers
- Message-ID: <1992Nov16.083401.1661@ica.philips.nl>
- Keywords: SCSI printers
- Organization: Philips Consumer Electronics, Eindhoven, The Netherlands
- References: <BxsI3M.2FC@research.canon.oz.au>
- Date: Mon, 16 Nov 1992 08:34:01 GMT
- Lines: 26
-
- In article <BxsI3M.2FC@research.canon.oz.au> andy@research.canon.oz.au (Andy Newman) writes:
- >I'm interested in finding out about how printers operate over the SCSI
- >bus. I'm not talking about the use of SCSI for a printer's own use
- >(i.e. to support a disk for font and image storage) but as the main
- >interface to the printer. The only SCSI connected printer device's
- >that I know anything about use SCSI to transfer rasters (framebuffers)
- >from the RIP to the print engine. Is anyone aware of other uses of
- >SCSI in printers? For example are there any PostScript printers out
- >there that use SCSI as the main interface.
-
- I've designed, built and programmed a SCSI-to-Centronics converter to
- connect an HPLJ IIIp to my SparcStation IPC (which has no standard
- parallel printer port). I used the standard SCSI WRITE command (10) to
- send blocks of printer bytes (PCL 5 commands) to the converter. I used
- a 2 bytes byte counter in stead of a one byte block counter.
-
- Later, after getting the SCSI-2 specs, I saw that they also implemented
- the WRITE command to send bytes to the SCSI printer. Check SCSI-2 if
- you want to use SCSI printers.
-
- BTW. The Sun (Apple) LaserWriter 2SC (Carmel) doesn't conform at all to
- the SCSI-2 spec. I even doubt if it conforms to the SCSI-1 spec. If I
- ask the 2SC to do synchronous data transfers, it locks up the SCSI bus.
-
- Adrie Koolen (adrie@ica.philips.nl)
- Philips Consumer Electronics, Eindhoven, the Netherlands
-