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> but for applications like the Apple PCs they could not remove the legacy addressing modes, because that would have broken the existing programs. The "FireBee
by cmrdporcupine 7mo ago
> but for applications like the Apple PCs they could not remove the legacy addressing modes, because that would have broken the existing programs.
The "FireBee" project which is/was an Atari ST-ish clone build on ColdFire ... proved this wasn't actually a huge obstacle, they made an Atari ST compatible system which provided a workable emulation mode that could still run classic 68k code. And then things like the kernel etc could be recompiled or modified in pure ColdFire mode for performance.
https://firebee.org/fb-bin/index https://firebee.org/fb-bin/index
I have one downstairs ... tho, in fact, I never ever use it.
Certainly a lot less disruptive than the half decade or more of crashy slow 68k emulation in PowerPC that Apple was forced to do instead. That initial era of PowerPC Macs running MacOS versions prior to 8 were.. terrible.