Ultimo is a Microkey Primo emulator.
Microkey Primo was a cheap Hungarian 8-bit microcomputer produced between 1984 and 1986. Originally meant for schools and hobbyists, the initially very awkward capacitive "keyboard" had not made it popular among the masses that finally led to the discontinuation of the computer. It is a pity, since the last prototype already had proper keyboard, colours and ZX Spectrum compatibility.
The emulator has a fairly high level of emulation with the following features: