From owner-freebsd-hackers Sat Sep 13 09:37:08 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id JAA12875 for hackers-outgoing; Sat, 13 Sep 1997 09:37:08 -0700 (PDT) Received: from rover.village.org (rover.village.org [204.144.255.49]) by hub.freebsd.org (8.8.7/8.8.7) with SMTP id JAA12868 for ; Sat, 13 Sep 1997 09:37:03 -0700 (PDT) Received: from harmony.village.org [10.0.0.6] by rover.village.org with esmtp (Exim 1.71 #1) id 0x9vBt-0007ks-00; Sat, 13 Sep 1997 10:37:01 -0600 Received: from harmony.village.org (localhost [127.0.0.1]) by harmony.village.org (8.8.7/8.8.3) with ESMTP id KAA05343; Sat, 13 Sep 1997 10:37:54 -0600 (MDT) Message-Id: <199709131637.KAA05343@harmony.village.org> To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch) Subject: Re: Do *you* have problems with floppies? Cc: hackers@freebsd.org In-reply-to: Your message of "Sat, 13 Sep 1997 08:09:39 +0200." <19970913080939.WU46166@uriah.heep.sax.de> References: <19970913080939.WU46166@uriah.heep.sax.de> <199709122056.NAA24445@usr08.primenet.com> Date: Sat, 13 Sep 1997 10:37:54 -0600 From: Warner Losh Sender: owner-freebsd-hackers@freebsd.org X-Loop: FreeBSD.org Precedence: bulk In message <19970913080939.WU46166@uriah.heep.sax.de> J Wunsch writes: : There are a lot of busy loops in the FreeBSD fdc driver, and you can : send a lovely ``thanks!'' letter to some stupid IBM engineer for : dropping the READY line from the floppy bus, apparently for the sake : of being able to use this twist-some-wires-for-drive-A hack. Actually, the ready line was either 33 or 34, which is at the end of the cable for the SCSI. And it was to allow the drive to signal that the physical disk had changed. Older floppies had this pin being READY, while newer (1.2M and 1.44M and many 720k) ones had it meaning disk change. This is one of the things that Digital got right in the Rainbow. It requires a functional READY line in order to operate properly. Warner