Loading OMAGIC kernels converted to Mach-O works now. 
(It seems that the booter expects the Mach-O header and load commands not
prepended to the text segment, but inlined into its beginning, just before
start. Fortunately there's more than enough room.)

I'm now getting some boot messages, depending on kernel config also some
serial console output. Fine.

But, how is one supposed to enter ddb on a NeXT? Cmd-~ perhaps?

Alternatively, how is the incantation to enter a kgdb-kernel over a serial
line as early as possible? (I suppose I should disable SERCONSOLE for this
...)

Any crucial config options (like disabling wscons on a color system)?

Timm
-- 
Timm Wetzel     	<twetzel@gwdg.de>
Biomed. NMR GmbH        Tel +49 551 201-1091    FAX +49 551 201-1307
Am Fassberg 11, D-37077 Goettingen, Germany