What about
MuFastZero?
"MuFastZero will remap the zero page of the RAM, which usually contains the
autovectors for interrupts, from ChipMem to FastMem. It will *NOT* change the
vector base register because this might result in certain incompatibilities.
It moreover replaces FastExec, which is really a bad hack, by providing a
method to relocate a chip memory based exec and expansion library to fastest
memory and hence speed up the system even more. For that, the "preparation"
tool "MuMove4K" must be run, which is contained in this archive. "MuMove4K"
replaces also the ShapeShifter "PrepareEmul" tool by something smarter.
Last but not least, MuFastZero can be told to remap the supervisor stack
to Fast memory as well."
