Some progress: further investigation revealed that cdboot has been hanging when trying to enable A20 line, apparently Mac simply don't have relevant legacy hardware. After commenting out appropriate routine call in cdboot I was able to get loader working just fine. The loader works normally, but unfortunately attempt to start kernel hangs up machine. I suspect that either Mac doesn't have real text mode or kernel also waits for some nonexisting legacy hardware indefinitely. -Maxim Bruce M Simpson wrote: > On Sat, Apr 08, 2006 at 03:43:58AM -0700, Luigi Rizzo wrote: >> Ii wonder if we can do more progress if we use >> a picobsd-like approach namely bypass btx and load the kernel >> directly. Reading your list we may well get stuck at the pci >> probe, but at least we should see the initial kernel messages. > > I would suggest that anyone who wants to get FreeBSD booting on the > mini-mac purchases a port 0x80 POST diag card (<$10 on eBay), and > instruments the early boot paths to output to such a device. > > If hacking kernel code then probably quicker to just use NFS and > PXE for starter bootstrap :-) > > Of course those of us who are lucky enough to have a PCI logic analyzer > (not me, though I bought an FPGA card explicitly for this purpose, > ENOTIME to learn hardware design language) will be able to do this > right away. > > It shouldn't be too difficult to implement PCI Configuration Register > Type 1 support. Ideally of course we'd support EFI natively w/o the shim. > > Regards, > BMS > >Received on Sun Apr 09 2006 - 20:02:18 UTC
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