Emulation of extra RAM is supported for the three known cartridges:
Animaction
which has an additional 2k on board ram located at $2000- $27ff
Spectrum RA
which has an additional 2k on board ram located at $8000- $87ff
Logo
which has an additional 8k on board ram located at $6000- $7fff
Also supported are the 8 LED from spectrum RA (controlled by the Joyport output of 8 buttons) - and a insert coin button (PB6 of Via ORB).
These can only be seen and accessed at the "cartridge" window (in dissi type "carti").

emulation view