From owner-freebsd-questions Tue May 18 14: 1:33 1999 Delivered-To: freebsd-questions@freebsd.org Received: from dlanor.evertsen.nl (node11a94.a2000.nl [24.132.26.148]) by hub.freebsd.org (Postfix) with ESMTP id 926CC14E87 for ; Tue, 18 May 1999 14:01:21 -0700 (PDT) (envelope-from ronald@node11a94.a2000.nl) Received: from localhost (ronald@localhost) by dlanor.evertsen.nl (8.9.2/8.9.2) with ESMTP id XAA01246 for ; Tue, 18 May 1999 23:01:17 +0200 (CEST) (envelope-from ronald@node11a94.a2000.nl) X-Authentication-Warning: dlanor.evertsen.nl: ronald owned process doing -bs Date: Tue, 18 May 1999 23:01:15 +0200 (CEST) From: "Ronald 'Ko' Klop" To: freebsd-questions@freebsd.org Subject: Cyrix 486 kernel options Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Hello, FreeBSD 3.1-RELEASE reports this as my CPU: CPU: Cyrix 486DX (486-class CPU) Origin = "CyrixInstead" DIR=0x031a Stepping=0 Revision=3 In the LINT-configuration are the following options: # CPU_BLUELIGHTNING_FPU_OP_CACHE enables FPU operand cache on IBM # BlueLightning CPU. It works only with Cyrix FPU, and this option # should not be used with Intel FPU. # CPU_DIRECT_MAPPED_CACHE sets L1 cache of Cyrix 486DLC CPU in direct # mapped mode. Default is 2-way set associative mode. # CYRIX_CACHE_WORKS enables CPU cache on Cyrix 486 CPUs with cache # flush at hold state. # # CYRIX_CACHE_REALLY_WORKS enables (1) CPU cache on Cyrix 486 CPUs # without cache flush at hold state, and (2) write-back CPU cache on # Cyrix 6x86 whose revision < 2.7 (NOTE 2). What is the BlueLightning CPU? Do I need this option? How do I know if I have a 486DLC? (Or will FreeBSD report this?) And how do I determine if my CPU has cache flush at hold state or not? Which of these options should I use? Or shouldn't I use them? Thanks in advance, Ronald. -- Ronald Klop http://node11a94.a2000.nl/~ronald/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message