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- Newsgroups: comp.sys.next.hardware
- Path: sparky!uunet!destroyer!cs.ubc.ca!unixg.ubc.ca!kakwa.ucs.ualberta.ca!news
- From: sherwood@space.ualberta.ca (Sherwood Botsford)
- Subject: Re: Color Printer Woes
- Message-ID: <1992Nov10.194051.26330@kakwa.ucs.ualberta.ca>
- Sender: news@kakwa.ucs.ualberta.ca
- Nntp-Posting-Host: fenris.space.ualberta.ca
- Organization: University Of Alberta, Edmonton Canada
- References: <1992Nov10.032343.23388@leland.Stanford.EDU>
- Date: Tue, 10 Nov 1992 19:40:51 GMT
- Lines: 32
-
-
- A parallel port or even direct ethernet connection is not all the
- answer to your woes.
-
- We bought a QMS colorscript thermal printer. So I connected it to the
- IBM RS6000's parallel port. Printed a file that had embedded a several
- megabyte bitmap.
-
- Twenty minutes later it printed.
-
- So much for fast parallel. IBM must have a bug in their printer
- driver.
-
- So I moved to a next and hooked it up at 9600 baud. Same file.
- 40 minutes.
-
- Got out the manual and upped the comm link to 19,200 baud. Same file:
- 20 minutes.
-
- Got a patched version of lpd that would handle 38,400 baud. Futzed
- about getting the printer to talk at this pace.
-
- Same file. 19 minutes.
-
- Turns out that the printer only has a motorola 68000 in it. At speeds
- above 19200 baud the rasterizer can't keep up with the data stream. So
- it says, 'Enough! Let me think' and a few seconds later opens up for
- another chunk.
-
- Moral: If you are going to be handling large files, be sure you test
- the printer with those files. Too many colour printers are crippled
- with slow cpu's.
-