From owner-freebsd-hardware Mon Sep 16 22:04:00 1996 Return-Path: owner-hardware Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id WAA08473 for hardware-outgoing; Mon, 16 Sep 1996 22:04:00 -0700 (PDT) Received: from mx.serv.net (mx.serv.net [199.201.191.10]) by freefall.freebsd.org (8.7.5/8.7.3) with ESMTP id WAA08462 for ; Mon, 16 Sep 1996 22:03:49 -0700 (PDT) Received: from MindBender.serv.net by mx.serv.net (8.7.5/SERV Revision: 2.30) id WAA09311; Mon, 16 Sep 1996 22:01:23 -0700 (PDT) Received: from localhost.HeadCandy.com (michaelv@localhost.HeadCandy.com [127.0.0.1]) by MindBender.serv.net (8.7.5/8.7.3) with SMTP id WAA21788; Mon, 16 Sep 1996 22:00:59 -0700 (PDT) Message-Id: <199609170500.WAA21788@MindBender.serv.net> X-Authentication-Warning: MindBender.serv.net: Host michaelv@localhost.HeadCandy.com [127.0.0.1] didn't use HELO protocol To: Michael Smith cc: hardware@freebsd.org Subject: Re: RAM timings for Triton chipsets? In-reply-to: Your message of Tue, 17 Sep 96 12:58:18 +0930. <199609170328.MAA28840@genesis.atrad.adelaide.edu.au> Date: Mon, 16 Sep 1996 22:00:41 -0700 From: "Michael L. VanLoon -- HeadCandy.com" Sender: owner-hardware@freebsd.org X-Loop: FreeBSD.org Precedence: bulk >Just a quick question for anyone familiar with the jargon that Award >use in their older Triton BIOSsen. [...] >I thought I'd try changing a couple of the memory timing options from >"x2222" to "x4444", there being no explanation of what these mean. >And lo and behold, the system _seems_ much faster. It could just be that >it's just been rebooted after being up for months, but at the same time >I'm wondering if the changes could be significant. It must be, because you just made it much slower... :-) x2222 and x4444 mean how many cycles it takes to access memory for each cycle of a burst read or write. The x means that the first access is longer (typically something like 6 cycles). After the first access, it can burst at a word for every 2 bus cycles (or as the case is now, for ever 4 bus cycles). ----------------------------------------------------------------------------- Michael L. VanLoon michaelv@MindBender.serv.net --< 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... -----------------------------------------------------------------------------