Cool! That was a lot of info. I don't understand all of it since I don't
know much about ABIs and compilers, but you did a great job of explaining
it! For future reference:

Here's an Open Firmware 2.0f1 Beige G3/DT/233 with the "B rev" ROM DIMM
load-base is 600000 and
real-base is F00000 and
384 MB of RAM, reports relative addressing mode

0 > dev /memory .properties  ok
name                    memory
device_type             memory
reg                     00000000  18000000
available               00000000 00F00000 01000000 17000000

and a PDQ PowerBook G3 with 512 MB of RAM, same real and load base
settings. Open Firmware 2.0.1 (reports relative addressing mode)

reg			00000000  10000000
available		00000000 00F00000 01000000 0F000000



-- 
The nice thing about Windows is - It does not just crash, it displays a
dialog box and lets you press 'OK' first.
						-- Arno Schaefer