uae_cart_internal
The option documentation is properly formatted yet
Built-in cartridge ROM Default: Example: hrtmon Since: 2.5.13 Tags: deprecated, emulation
Value: hrtmon
Using uae_cart_internal = hrtmon is the same as uae_cart_file = :HRTMon.
Deprecation notice. This value is (probably) deprecated. WinUAE does not save this option to .uae config files. Instead, it saves uae_cart_file = :HRTMon.
Source: https://github.com/FrodeSolheim/fs-uae/blob/master/docs/options/uae_cart_internal