Linked by Thom Holwerda on Tue 18th Jul 2006 22:51 UTC, submitted by Raffaele
Amiga & AROS "In a previous item, we described how the AmigaOS4.0 memory system works in terms of managing memory allocations from the top. However, there is more to allocating memory than that. The object caches of course work on memory that has already been mapped into the virtual memory space. But both the virtual address ranges, as well as the physical memory has to come from a source, too."
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Re: great OS without hardware
by trezzer on Wed 19th Jul 2006 16:47 UTC
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It has been rehashed time and time again within the Amiga community - and of course you're excused for not knowing about it. But it's really quite simple: It won't happen. At least not in the foreseeable future.

The OS is big endian and it would take a lot of work to convert everything to little endian. Besides that the markets that are alluring for the development team (embedded) tends to favour PPC chips, so it makes sense to have a PPC development platform. It's probably more realistic to aim at businesses with specific needs and sell them what they need rather than try to recapture the desktop market, which has high expectations for what a desktop OS needs today. Sure, AmigaOS 4 lives up to a lot of it and in some areas it still offers features sadly lacking in other systems. But these days you're supposed to deliver a system that plays dvds, shows flash, has java, has a full office suite etc out of the box.

There are probably a lot of users that will be happy with less, but most won't. One of the strengths of AmigaOS 4 is the low footprint, efficiency and relative elegance. That makes it an interesting product for embedded markets (even though some will go with Linux, QNX or other solutions). It's also a great hobbyist computer and it'll also do most of your tasks like some word processing, DTP, graphics, mail, chatting and so on. But it's not for the mainstream market yet. Not even close - as much as I love it (heck, typing from OS4 right now).

I don't really agree with the usual argument that by moving to x86, you're effectively going up against Windows, because you already are. But the advantages of being PPC - and not least the economic realities of OS4 development - mean that it's not going to a different CPU family than PPC any time soon. What we can hope for, though, is some cheap hardware for people that want to try it out. It's not impossible - it just hasn't happened yet.

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