Re: What to do with slow Chip/ST RAM

[mlelstv%serpens.de@localhost (Michael van Elst)]

abs%NetBSD.org@localhost (David Brownlee) writes:

>       So would this grouping make sense?

>       - 32bit "local" RAM on accelerator board (fastest)
>       - 32bit "local" RAM on motherboard (next fastest)
>       - Ranger memory/Zorro-II RAM/16bit RAM (slow)

>       - 32bit Chip RAM / 16bit Chip ram (not used for running programs)

Yes. And now for the tricky part to find out which is which.

If you forget about the 'grouping' you can just rely on the sorting
of AmigaOS, the bootloader will pass the sorted list of memory
regions. On some systems you will see multiple areas of the same type
if e.g. there are several Zorro-II memory boards that cannot
be coalesced into a single region.

There is one caveat, you cannot easily distinguish non-Chip RAM
and Ranger memory. Both are presented as 'Fast RAM' and may
use the same address space, non-Chip RAM however should not
be used. The easiest solution is to forget about both by
filtering out any memory region between 0x00A00000 and 0x00FFFFFF.

-- 
-- 
                                Michael van Elst
Internet: mlelstv%serpens.de@localhost
                                "A potential Snark may lurk in every tree."