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root / ray / fotos / AirportLinux
A few impressions from Linuxing my Airport Base Station. Thanks to Till Straumann for making this possible! I replaced the modem with a G4port (the Stealth Port G4 should be ok as well). It works, but I had to remove a few modem specific routines in Till's code.

As you can see, it's always nice to have an old Mac with a serial port around :)
img1-board-top.jpg66.6KBThe heart of Apple's Graphite Base Station: A plain vanilla KarlNet reference design based on the AMD Elan400 Microcontroller (beneath the Lucent WLAN card). Lucent's Orinoco RG-1000 is based on the same design (and it's cheaper, too -- less than 200 Euros in Germany). Walk over to SeattleWireless for more info (and better pictures).
img2-board-back-with-g4port.jpg94.1KBThe G4Port sits in the place usually occupied by the venerable Apple V90 modem, also used in the PowerBook G3 (Pismo) and the PowerMac G4 (Sawtooth).
img3-g4port-sideview.jpg53.2KBThe G4Port is connected to the board with a proprietary 40pin connector. Yuck!
img4-board-tilted.jpg71.9KB 
img5-g4port-tilted.jpg56.1KBThe G4Port is basically just an adapter from the impossible-to-get Apple 40pin connector to a serial port (with a few capacitors and a gate thrown in for good measure). The 8pin header to the serial connector has 2 mm spacing instead of the widely used 2.54 mm. This is unfortunate, because I have a secret mission for the modem signals (DCD, DTR, CTS).
img6-lightshow.jpg52KB 
img7-mini-din.jpg38.4KBOld-Skool Apple serial connectors (aka Mini-DIN, RS422).
img8-monitor-1.jpg46KBThe bootup sequence of the Airport output via serial port, displayed in ZTerm. TillLoad, Etherboot, Kernel.
img9-monitor-2.jpg36.3KB