7 Nov 01:14 2007
Re: Nubus-pmac-users Digest, Vol 17, Issue 3
Alex Kenis <alex <at> aletheian.com>
2007-11-07 00:14:22 GMT
2007-11-07 00:14:22 GMT
OK. Since I only have 1400's around as guinea pigs, I looked into how to go about migrating or rewriting the video driver. I had a 1400-specific brainstorm: the machines (as well as the 5300 and 2400 and perhaps the older 190-68k and 550-PPC) use the Chips & Technologies 65225 chip, which is apparently very similar to the chips in other older 68k powerbooks. It seems that there are already 2.6-kernel drivers for the 68k nubus 'books (I'll have to double-check) as well as the later chips and technologies 65520 - 65554 series chips from PCI 'books. Does anyone think that it would be worthwhile to pursue my hacking the two drivers together in some way, or am I missing something obvious?
I could answer that question for myself if I could find ANY data sheets for C&T chips from before the 655xx series! But I have not unearthed any as of yet. I assume that a few members already have this, but i have also dug up Apple's MkLinux video_ecsc.c source code for the 5300, as well as their video_console.c and a few other possibly relevant tidbits to see if there is any helpful info in them, as well as the old Apple MPW development environment from their old FTP (this may be useless... but I would like to have it for posterity's sake).
PS i have one of my 1400's apart on my workbench if anyone needs info on any of the specific chips or other internal hardware ... just ask. The Video chip is labeled: CHIPS T65225 A , and the video RAM devices are IBM 70ns 5v 256K x 16 Multiport CMOS SO DRAM
On Nov 6, 2007, at 3:22 PM, nubus-pmac-users-request <at> lists.sourceforge.net wrote:
Send Nubus-pmac-users mailing list submissions toTo subscribe or unsubscribe via the World Wide Web, visitor, via email, send a message with subject or body 'help' toYou can reach the person managing the list atWhen replying, please edit your Subject line so it is more specificthan "Re: Contents of Nubus-pmac-users digest..."Today's Topics:1. Re: Nubus-pmac-users Digest, Vol 17, Issue 2 (Alex Kenis)2. Re: Any progress on a 2.6 kernel? (Florian Boelstler)From: Alex Kenis <alex <at> aletheian.com>Date: November 6, 2007 11:33:24 AM ESTSubject: Re: [Nubus-pmac-users] Nubus-pmac-users Digest, Vol 17, Issue 2Reply-To: For users of Linux on NuBus PowerMacs <nubus-pmac-users <at> lists.sourceforge.net>I'll take a look at it. I am not sure of the differences between the 2.4 and 2.6 code, but I'll start researching tonight.AlexOn Nov 6, 2007, at 3:43 AM, nubus-pmac-users-request <at> lists.sourceforge.net wrote:Hi Alex,Alex Kenis wrote:So are there any solutions being kicked around that I can perhapswork on?I am currently working on a specific 2.6 kernel version (18.104.22.168),which is based on the old ppc-tree -- the one that can live without an"emulated" OF device tree.It is working in the sense that it goes through the hardware detectionthough crashes lately during the call of some yet to be determinedinit()-function of some driver.Although this development effort might sound counterproductive IMHO itmakes sense to get at least some 2.6 kernel to work. As soon as allnubus-specific parts have been ported, we can try to find a solutionregarding the bootloader/powerpc/OF-device-tree-issue.One thing we need independent of the underlying ppc kernel tree is aframe buffer driver for the PowerBooks 1400 and 5300.Its 2.4-based implementation is found in  and needs to be ported tothe 2.6-stylish frame buffer interface.(It is originally derived from the "Open Firmware based frame bufferdevice", which has been already ported to 2.6 as part of the mainlinekernel and is available in drivers/video/offb.c)Let me know if you're interested.Cheers,Florian
From: Florian Boelstler <euphoria <at> arcor.de>Date: November 6, 2007 2:48:56 PM ESTTo: For users of Linux on NuBus PowerMacs <nubus-pmac-users <at> lists.sourceforge.net>Subject: Re: [Nubus-pmac-users] Any progress on a 2.6 kernel?Reply-To: For users of Linux on NuBus PowerMacs <nubus-pmac-users <at> lists.sourceforge.net>Kaj-Michael Lang wrote:Is this available in some repo somewhere ?No, not yet.I wanted to sort some problems out before putting it on some repository.Interested in doing some serious development?Cheers,Florian-------------------------------------------------------------------------This SF.net email is sponsored by: Splunk Inc.Still grepping through log files to find problems? Stop.Now Search log events and configuration files using AJAX and a browser.Download your FREE copy of Splunk now >> http://get.splunk.com/_______________________________________________Nubus-pmac-users mailing list
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