From owner-freebsd-hackers Mon Jun 19 01:14:27 1995 Return-Path: hackers-owner Received: (from majordom@localhost) by freefall.cdrom.com (8.6.10/8.6.6) id BAA02636 for hackers-outgoing; Mon, 19 Jun 1995 01:14:27 -0700 Received: from uni-sb.de (uni-sb.de [134.96.7.230]) by freefall.cdrom.com (8.6.10/8.6.6) with SMTP id BAA02629 for ; Mon, 19 Jun 1995 01:14:20 -0700 Organization: Universitaet des Saarlandes D-66041 Saarbruecken, Germany Received: from macrosun.ee.uni-sb.de with SMTP by uni-sb.de (5.65++/UniSB-2.2/9502015) id AA18374; Mon, 19 Jun 95 10:13:57 +0200 Received: by ee.uni-sb.de; Mon, 19 Jun 95 10:17:57 +0200 From: "Joachim Koenig" Message-Id: <9506190817.AA26266@microdesk8.ee.uni-sb.de> Received: by microdesk8.ee.uni-sb.de; Mon, 19 Jun 95 10:17:29 +0200 Subject: Re: printer recommendation? To: leisner@sdsp.mc.xerox.com (Marty Leisner) Date: Mon, 19 Jun 1995 10:17:27 +0200 (MET DST) Cc: freebsd-hackers@freebsd.org In-Reply-To: <9506161929.AA16085@gnu.mc.xerox.com> from "Marty Leisner" at Jun 16, 95 12:29:52 pm X-Mailer: ELM [version 2.4 PL20] Content-Type: text Content-Length: 880 Sender: hackers-owner@freebsd.org Precedence: bulk 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