From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: Content-Type: text/plain; charset=us-ascii MIME-Version: 1.0 In-Reply-To: <19990113104026.C1056@dirkpitt.solsoft.fr> Date: Wed, 13 Jan 1999 16:18:57 -0000 (GMT) From: Gary Thomas To: Hubert Figuiere Subject: Re: Porting to NuBus PowerMacs Cc: linuxppc-dev@lists.linuxppc.org, Benjamin Herrenschmidt Sender: owner-linuxppc-dev@lists.linuxppc.org List-Id: On 13-Jan-99 Hubert Figuiere wrote: > > According to Benjamin Herrenschmidt : > >> >-we have the source of the Mach MicroKernel, hence we have enough >> > to rewrite the specification to rewrite drivers for LinuxPPC. >> > Some components and drivers may directly come from Linux Mac68k. >> >> We have also a lot of potentially useful things in the mac68k and APUS ports. >> >> >Note that I don't have a NuBus PowerMac. Only a 6200 (and my >> >PowerCenter Pro, already supported). >> >> ;-) > > I'm investigating the possibilities to support 5200/6200 (and its > little brother 5300/6300) just because this machine is: > > a) not supported by either MkLinux or LinuxPPC > b) I have one (in fact my fiancee has it). > > There are several custom chips inside (like on any other Mac). > First the big problem is that 6200 is a PowerPC inside a 68040 > machine. It uses a "CAPELLA" custom chip as a bus translation > unit. This may be a problem since I don't think it is used in any > supported PowerMac. > > RAM: 2 simm slot on a 68040 data bus. > > Video: It is a "Valkyrie" Chip using a DRAM frame buffer. If I > remember, Valkyrie is available in several PowerMacs and is > already supported. > > Memory Controller: it is a "F108" as in the LC 630 (ses Linux 68k > port) that also handles IDE, SCSI and SCC serial ports. SCSI in > this chip is a NCR 53C96. SCC is like the 8530 SCC (that we find > in several Macs too). > > ADB: "CUDA" chip similar to several 68k Mac. Accessed thru the > "PrimeTime II". It is the 68HC05 and also handles PRAM, RTC, > power supply control. > > Sound: a "DFAC II" chip. > > Other: "PRIMETIME II" chip manages SWIM II, VIA1, VIA2, sound > controller and I/O bus adpater. Manages ADB sounds, CommSlot, PDS. > > You can find the technote here: > > http://developer.apple.com/techpubs/hardware/hardware2.html > This document does not have enough detail to be able to make a port for this hardware. As far as I know, such details are only available directly from Apple under NDA until they decide to "leak" the info out, such as releasing ports, drivers, etc. > Note that I have no porting experience. :-) We all start somewhere :-) ------------------------------------------------------------------------ Gary Thomas | email: gdt@linuxppc.org | "Fine wine is a necessity of ... opinions expressed here are mine | life for me" and no one else would claim them! | | Thomas Jefferson ------------------------------------------------------------------------ [[ This message was sent via the linuxppc-dev mailing list. Replies are ]] [[ not forced back to the list, so be sure to Cc linuxppc-dev if your ]] [[ reply is of general interest. To unsubscribe from linuxppc-dev, send ]] [[ the message 'unsubscribe' to linuxppc-dev-request@lists.linuxppc.org ]]