From owner-freebsd-questions Thu Apr 25 06:56:28 1996 Return-Path: owner-questions Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id GAA10716 for questions-outgoing; Thu, 25 Apr 1996 06:56:28 -0700 (PDT) Received: from mail.think.com (Mail1.Think.COM [131.239.33.245]) by freefall.freebsd.org (8.7.3/8.7.3) with SMTP id GAA10710 for ; Thu, 25 Apr 1996 06:56:25 -0700 (PDT) Received: from Early-Bird-1.Think.COM by mail.think.com; Thu, 25 Apr 96 09:56:23 -0400 Received: from by Early-Bird.Think.COM; Thu, 25 Apr 96 09:56:20 EDT Received: (from alk@localhost) by compound.Think.COM (8.7.5/8.7.3) id BAA01917; Thu, 25 Apr 1996 01:53:51 -0500 (CDT) Date: Thu, 25 Apr 1996 01:53:51 -0500 (CDT) Message-Id: <199604250653.BAA01917@compound.Think.COM> From: Tony Kimball To: questions@freebsd.org Subject: bounce buffers Sender: owner-questions@freebsd.org X-Loop: FreeBSD.org Precedence: bulk Under what circumstances are bounce buffers indicated? Are they not indicated in all systems using >16MB DRAM? My impression was that all such systems would require bounce buffers in order to support DMA generally, while no other systems would require bounce buffers.