>* The POWERMAC kernel hangs during configure(), after printing:
>
>  adb0 at obio0 offset 0x16000 irq 18

Please apply following patch.
(I don't know 1ms is appropriate:-)


*** adb_direct.c	Thu Mar  5 19:02:59 1998
--- /a/src/sys/arch/powermac/dev/adb_direct.c	Thu Mar  5 19:02:23 1998
***************
*** 1256,1261 ****
--- 1254,1261 ----
  
  	adb_hw_setup();		/* init the VIA bits and hard reset ADB */
  
+ 	DELAY(1000);
+ 
  	/* send an ADB reset first */
  	adb_op_sync((Ptr) 0, (Ptr) 0, (Ptr) 0, 0x00);