From owner-freebsd-hardware Tue Jun 4 22:40:58 1996 Return-Path: owner-hardware Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id WAA05930 for hardware-outgoing; Tue, 4 Jun 1996 22:40:58 -0700 (PDT) Received: from MindBender.HeadCandy.com (root@[199.238.225.168]) by freefall.freebsd.org (8.7.5/8.7.3) with ESMTP id WAA05923 for ; Tue, 4 Jun 1996 22:40:55 -0700 (PDT) Received: from localhost.HeadCandy.com (michaelv@localhost.HeadCandy.com [127.0.0.1]) by MindBender.HeadCandy.com (8.7.5/8.6.9) with SMTP id WAA25402; Tue, 4 Jun 1996 22:39:32 -0700 (PDT) Message-Id: <199606050539.WAA25402@MindBender.HeadCandy.com> X-Authentication-Warning: MindBender.HeadCandy.com: Host michaelv@localhost.HeadCandy.com [127.0.0.1] didn't use HELO protocol To: "Brett Glass" cc: freebsd-hardware@freebsd.org Subject: Re: Hayes ESP In-reply-to: Your message of Tue, 04 Jun 96 18:47:04 -0800. <9605048339.AA833939625@ccgate.infoworld.com> Date: Tue, 04 Jun 1996 22:39:31 -0700 From: "Michael L. VanLoon -- HeadCandy.com" Sender: owner-hardware@freebsd.org X-Loop: FreeBSD.org Precedence: bulk >> The version 1 cards were really pretty bogus from what I understand -- >> they would only support speeds up to 57600, and had some other weird >> limitations. >Don't know about any speed limitations, but we have one at LARIAT that's >working fabulously under FreeBSD. We configure our serial ports at 38.4 to >provide a little breathing room, and with at least 1K of buffering on each >port, it's unloading the system. The automated RTS/CTS handshaking is a >boon. Oh, I remember the other thing... The version 1 cards had gross specific demands on how fast you could send data to the advanced programming registers. You had to spin and wait on a status register when writing to or reading from those registers -- if you shoved stuff in too fast, I believe it got unhappy. From what I understand, the version 2 cards don't display this "feature". It's been over a year since I studied this stuff, so apologies if my details are a little sketchy... >> All the Hayes ESP cards I have personally seen are version 2, >> including both of the cards I own. >Is this the one with the Bizcom UART on it? I have no idea. I don't remember seeing anything saying Bizcom, and the "main" chip has a Hayes logo on it. But, it's been several weeks since I've actually looked at the card.... ----------------------------------------------------------------------------- Michael L. VanLoon michaelv@HeadCandy.com --< Free your mind and your machine -- NetBSD free un*x >-- NetBSD working ports: 386+PC, Mac 68k, Amiga, Atari 68k, HP300, Sun3, Sun4/4c/4m, DEC MIPS, DEC Alpha, PC532, VAX, MVME68k, arm32... NetBSD ports in progress: PICA, others... Roll your own Internet access -- Seattle People's Internet cooperative. If you're in the Seattle area, ask me how. -----------------------------------------------------------------------------