without going to a faster crystal, etc.?
There is; you can do the ZipGSx Split Cache Mod. As your manual explains, Zip GSX speed comes from having a faster processor which can access code and data from its high-speed cache RAM. The standard ‘GSX has a unified cache, which means data and code have the possibility of overlapping. If the cache controller sees a need to bring in a lot of code, it will go to main memory and bring in up to 64k of code (or 16k in a 16k cache system) and, possibly, overwrite useful data. The reverse is also true. If the controller feels that a lot of data needs to be brought in, it will cache the data, and, possibly, overwrite useful code, causing another slowdown when the code needs to be fetched again. With a split cache, the code and data segments no longer overlap. Caching code cannot overwrite data, caching data cannot overwrite code. The drawback is that only 32k of data and 32k of code can be cached at once (in a 64k system), but usually this provides for more speed than being able to cache a
