From mint-bounce@lists.fishpool.fi Wed Aug 10 12:02:30 2005 X-Original-To: fnaumann@mail.boerde.de Delivered-To: fnaumann@mail.boerde.de Date: Wed, 10 Aug 2005 12:01:04 +0200 From: mikro Cc: Mint list Subject: Re: [MiNT] what's wrong with this code? Message-ID: <20050810100104.GB29857@hysteria.sk> References: <20050810084953.GA29857@hysteria.sk> <42F9C8C7.6040602@klockars.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <42F9C8C7.6040602@klockars.net> User-Agent: Mutt/1.4.2.1i X-ecartis-version: Ecartis v1.0.0 Sender: mint-bounce@lists.fishpool.fi Errors-To: mint-bounce@lists.fishpool.fi X-original-sender: mikro@hysteria.sk Precedence: bulk List-help: List-unsubscribe: List-Id: X-List-ID: X-Virus-Scanned: by amavisd-new at relay.boerde.de X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on relay.boerde.de X-Spam-Status: No, hits=-1.0 tagged_above=-50.5 required=7.0 tests=AWL, BAYES_00 X-Spam-Level: > Why? > for speed. i guess Super() is much slower than simple trap call. > That is not supposed to work from user mode on Atari hardware. The > bottom few kbyte (don't remember exactly, but at least past the system > variables, so probably until $800 or so) are protected by the hardware. > of course, i know this fact. that $80.w move i do in supervisor. > You're doing this on a CT60, right? I guess it does something (remap low > memory or similar) that makes this possible in the normal case. > as long as you don't switch to SV it isn't possible on anything, that's clear > more overhead). The last one would allow you to add your own Trap #0 > handler safely (well, at least unless you have turned on maximum > protection in MiNT). > thanks for tip, but i fear it wont help since there's no problem in handler vector setting but with the application of it. > MiNT with memory protection should set the MMU up to protect that memory > no matter what the hardware does. > > But it really "shouldn't" work in the other cases either. See above. > as i wrote, setting the $80 isn't the issue. if i disable code that calls trap #0, it works. so that's the reason why i'm so confused with that MP (non)functionality... -- --------------------------------------------------------------------------- MiKRO Atari XE/XL/Mega STE/Falcon060 http://mikro.atari.org ---------------------------------------------------------------------------