Re: Speeding up the old IIs (not the GS)

[Eric Rucker <bhtooefr@gmail.com>]

On Aug 12, 10:57 pm, nyder <nyder...@gmail.com> wrote:
> I always wondered how those accels you put in the cpu sockets
> worked.   Like if you could use one for another computer system in a
> different system.  (ie. mac 040 accel in an amiga).   I figure it
> needs some drivers, but wondered how much is machines specific.

Depends on the approach, but they usually are machine specific.

Some areas of memory, you can't cache, and/or need to access at bus
speed - usually because of timing issues, and/or because they're I/O.
(Or, in the case of entire-RAM accelerators like the original
TransWarp or the SuperCPU, you must access motherboard space at bus
speed, instead of accelerator space at accelerator speed.)

Of course, those areas will be different on differing machine
architectures, and that's why accelerators are specific to machine
architectures.