uae_z3mem_start
The option documentation is properly formatted yet
Default: 0x10000000 Type: integer
p->z3autoconfig_start = 0x10000000;
Note sure if/when this option is used, nowadays. It looks like it is more or less ignored / overwritten in mman.cpp.
See: [uae_z3mem_size], [uae_z3mem2_size], [uae_z3mapping] See: [uae_force_0x10000000_z3]
Source: https://github.com/FrodeSolheim/fs-uae/blob/master/docs/options/uae_z3mem_start