Simple hack?
just some simple OpenFirmware hackery
although a bit more complicated then when I got OS X Server 1.2v3 booting on my PowerBook4,1/PowerMac2,2/PowerMac3,6 machines , since here not only did I have to do the usual of change the Model identifier to one which is compatible with the BootX boot loader (in this case I changed PowerBook3,1 to PowerBook2,1), I also had to figure out the GPU situation since I could get OS X Server 1.2v3 booting but the window server would not load as no GPU drivers at all where loading. (these same hacks might even get OS X Server 1.2v3 booting on a first Gen TiBook but I lack such a machine to try it on)
the fix for the GPU issues was actually the same fix for getting XGA screens working in FW clamshells, setting that display-family property at the root of the device tree in the Pismos case, actually causes the GPU properties to change from RageM3 to RageM3p29 which is OS X Server1.2v3 friendly
the way I have done it so far has been volatile (ie OF commands need punching in at every boot)
however I could prolly wrap it all up into an nvramrc script but as the Pismos PRAM is backed up by a probably flat/missing PRAM battery the script would just get lost every time the machine loses Power....
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