Date: Mon, 19 Jun 1995 10:17:27 +0200 (MET DST) From: "Joachim Koenig" <joachim@microdesk8.ee.uni-sb.de> To: leisner@sdsp.mc.xerox.com (Marty Leisner) Cc: freebsd-hackers@freebsd.org Subject: Re: printer recommendation? Message-ID: <9506190817.AA26266@microdesk8.ee.uni-sb.de> In-Reply-To: <9506161929.AA16085@gnu.mc.xerox.com> from "Marty Leisner" at Jun 16, 95 12:29:52 pm
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Marty Leisner wrote: >And parallel ports can go at about 100Kbytes/second...which is >about the speed on an ethernet that's doing anything things... > They can go at up to 500Kbytes/sec in standard mode, if you have a chip with a parallel port fifo (eg SMC37FDC66[56] Superio chips) that does the neccessary handshaking in hardware. The 100Kb speed stems from the fact that you have to do at least 4 to 6 ISA bus accesses for data/status/control. The parallel port protocol spec allows for the above 500Kb. With ECP/EPP you can go up to as high as 2MB/sec, but none of the available printers from HP and Lexmark do support that yet. Joachim -- email: joachim@ee.uni-sb.de University of Saarland, Germany, Europe phone: +49 681 3023043 suffering should be creative, fax: 2678 should give birth to something good and lovely <Ende der Fahnenstange>
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