-On [20000114 16:02], Benjamin Herrenschmidt (benh@mipsys.com) wrote:
>On Fri, Jan 14, 2000, Sanjay Lal <sanjayl@iqmail.net> wrote:
>
>>Is the UniNorth Bridge the Motorola MPC107, or an entirely different chipset?
>
>Entirely different Apple custom chipset.

If I may believe this source (c't magazine), it is a VLSI 9933, if
anyone can find the pdf's, please mail me the URL. =)

>It contains internally 3 PCI buses with different io and config spaces
>(unfortunately, they share the same bus number which is quite annoying
>for linux, maybe not for netbsd, I don't know).
>
>  - The AGP bus with the video board
>  - The external PCI bus which can run at either 33 or 66Mhz (runs at 33
>on iBook and, I think, iMacs, and at 66MHz on G4. On the G4, it's routed
>to a DEC PCI<->PCI bridge which converts this 32bit/66MHz bus to a
>64bits/33MHz bus)
>  - The internal PCI bus on which there are some PCI devices cells that
>are internal to the uni-n chip. To my kowledge, there is the gmac
>ethernet controller (used on the iBook and on recent versions of the G4,
>possibly on recent iMacs too) for which I'm currently writing a Linux
>driver.

The Ethernet controller is an Intel 21143-TD.

>It's basically a Sun "GEM". And there is a firewire controller
>which is not used yet. (Apple uses an external Texas controller on the
>iMacDV and the G4)

Seems that the G4/450 uses a Lucent FW803 06 for the Firewire.

The PCI-to-PCI bridge is an Intel 21154-BC.

A Lucent 1258AK3 for the KeyLargo, the 2nd ASIC, which does the
communication between the IO controllers.

The modem is based on a Rockwell chipset.

Please, if you find any URL's post them back to the list. =)

-- 
Jeroen Ruigrok vd W/Asmodai         asmodai@[wxs.nl|bart.nl|freebsd.org]
Documentation nutter/B-rated Coder BSD: Technical excellence at its best  
The BSD Programmer's Documentation Project <http://home.wxs.nl/~asmodai>
How the gods kill...