Originally Posted by oRBIT
The graphicsengine is currently optimized for highend systems at the moment (targeted at Natami actually, if it ever gets released). I'm sure a more optimized engine can be written for lower end Amigas, but it's a tradeoff... Compability vs speed.
You can make optional JIT version for CPU emulation or put some routines online for later speed optimalisations. Simple CPU emulation of 8bit CPU uses too many CPU cycles (minimum one jump plus one table read is necessary or one jump and two commands for every 8bit command emulation).