Hi everyone,
Although I no longer have my Zaurus C1000 to test/develop Z apps on, I speak to Exophase on a regular basis. Exophase is the author of gpSP, and I was doing the official port of gpSP to the GP2X Linux handheld. I successfully got a dynarec working for it, and now Exophase has control of the gpSP GP2X project.
What I'm getting at is, I believe the Zaurus port is using an "interpreter" for GBA CPU emulation and not the MUCH faster dynarec. I have a great deal of the in's and out's of this emulator, and having a direct contact to Exophase helps too. If the author of port of gpSP for the Zaurus needs any help, let me know. Just wish I had my Zaurus C1000 back! Improved dynarecs on ZPSX and gpSP would be great.