Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263379AbUJ2PrT (ORCPT ); Fri, 29 Oct 2004 11:47:19 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263412AbUJ2PpQ (ORCPT ); Fri, 29 Oct 2004 11:45:16 -0400 Received: from kinesis.swishmail.com ([209.10.110.86]:19731 "EHLO kinesis.swishmail.com") by vger.kernel.org with ESMTP id S263379AbUJ2PfH (ORCPT ); Fri, 29 Oct 2004 11:35:07 -0400 Message-ID: <41826668.50208@techsource.com> Date: Fri, 29 Oct 2004 11:48:56 -0400 From: Timothy Miller MIME-Version: 1.0 To: linux-os@analogic.com CC: Daniel Phillips , Jeff Garzik , Linux Kernel Mailing List Subject: Re: Some discussion points open source friendly graphics [was: HARDWARE: Open-Source-Friendly Graphics Cards -- Viable?] References: <417D21C8.30709@techsource.com> <417D6365.3020609@pobox.com> <417D8218.9080700@techsource.com> <200410271423.33380.phillips@istop.com> In-Reply-To: Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1221 Lines: 37 linux-os wrote: > On Wed, 27 Oct 2004, Daniel Phillips wrote: > >> On Monday 25 October 2004 18:45, Timothy Miller wrote: >> >>> My intention is to include a bit of logic in the FPGA which can be used >>> to reprogram the prom. You would then cycle power to get the FPGA to >>> load the new code. >> >> >> Power cycle the whole machine, or software-reset the card? >> >> Regards, >> >> Daniel > > > The FPGA requires a physical reset-pin toggle to load new > bits into the gate-array. This could be software-toggled, > but that would require at least one external gate. This > is because the power-reset needs to reset the chip before > its bits are loaded plus some pin, after loading, needs to > be an output to its reset pin also. Therefore, you need > the external gate that is always present. Generally speaking, more chips == bad. If reprogramming the FPGA were a regular event, I'd see the point, but I hope that MOST users would NEVER have to reprogram it. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/