Who's selling os4 in sweden?

Wouldn't a SAM type board as an addition to the A1200/3000/4000 be nice to run OS4 on?

Well, one does wonder what would be required to get the classic os4 package to run on the SAM. In terms of drivers and such. As a community effort separated from Hyperion and ACube.

There's generally large differences between different ppc processors? In contrast to say x86 processors I mean. As there's usually no problems installing an old redhat linux on a todays x86 processor that wasn't even though of back when the distro was made.

Or is it that the x86 bios takes care of setting up the system and a corresponsing functionality has to be built into os4 exec directly since there is no firmware to provide it for the os?

If so, can this be layered in some way to keep such specifics away from exec and just let exec run on any ppc op-code compatible cpu while other lower level modules are needed to tie it to the specific cpu's?

Actually, that's what the HAL is for. It's separated into machine and CPU (and a common) part. The machine part deals with machine specific issues, like PCI and interrupt controllers, and the CPU part deals mainly with MMU, caches and on-chip timers (and interrupt controller if it's on-chip).

And os4 classic has that level of HAL layering (Ie the cpu specific parts) right now, making it at least in in theory possible to just replace those parts with something that uses the same api's? Or is all/part of it compiled into the same binary?( either by necessity or design)