From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1DZSiF-0005l7-S2 for qemu-devel@nongnu.org; Sat, 21 May 2005 08:04:16 -0400 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1DZSiB-0005hg-Oj for qemu-devel@nongnu.org; Sat, 21 May 2005 08:04:12 -0400 Received: from [199.232.76.173] (helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1DZSiA-0005Ze-Lh for qemu-devel@nongnu.org; Sat, 21 May 2005 08:04:10 -0400 Received: from [62.210.190.9] (helo=brazzaville.magic.fr) by monty-python.gnu.org with esmtp (Exim 4.34) id 1DZSka-00007F-MC for qemu-devel@nongnu.org; Sat, 21 May 2005 08:06:41 -0400 Received: from private2 (ppp-181.net-555.magic.fr [62.210.255.181]) by brazzaville.magic.fr (8.11.6/8.11.6) with ESMTP id j4LBvUQ08434 for ; Sat, 21 May 2005 13:57:31 +0200 Subject: Re: [Qemu-devel] OS/2 PPC booting making some progress From: "J. Mayer" In-Reply-To: <428EF097.8070704@co.inet.fi> References: <428EF097.8070704@co.inet.fi> Content-Type: text/plain Date: Sat, 21 May 2005 13:57:31 +0200 Message-Id: <1116676651.15980.61.camel@rapid> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Reply-To: qemu-devel@nongnu.org List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org On Sat, 2005-05-21 at 11:25 +0300, Tero Kaarlela wrote: [...] > Hi, > > I have made some modifications to PPC PREP booting to get OS/2 > bootloader working. Now I hopefully have made some progress (it isn't > working yet but has gone forward on my opinion). So I have few questions > at the moment: > > 1. on debug 1. Is the opcode really invalid or just unsupported one? Yes. The endianness is wrong: if you reverse this opcode, you've got a valid one. There may have been a jump to a random place... > 2. on debug 2. What is this unaffected IO port 838 it tries to read & > write ? This port is not documented in the PREP specification. You should check in the Linux kernel to see if this port seems important. Or you may take a look to Motorola PowerStack documentation: those boards are well documented and OS/2 is supposed to know how to boot on it. > 3. Might that unsupported ioport prevent booting? Can be possible... Have to check the code that uses that I/O port... [...] -- J. Mayer Never organized