WHAT EMULATES RIGHT IN FBZX? -Screen timmings in 48K and 128K mode. -Screen generation, so border efects and even attribute changing efects should work fine. -48K sound (included the low-pass filter efect of Tape out). -128K sound (fully emulation of the AY-3-8912). -Trash in the bus when reading from a non-existing port. This is right generated (from the data being displayed in that moment) so games works right (like SHORTCIRCUIT, that runs without flickering). -Spectrum 48K Issue 2 and 3 efects in the EAR bit are correctly emulated. -Priority of joystick over keyboard. -Snow efect when I register points between 64 and 127. -Emulation of Interface I and Microdrive (only one drive). -Memory contention -Emulates Spanish 128K from Investronica/Sinclair -Allows to insert POKE values in memory (inmunity, infinite lives...) -Can load and save SCR snapshots -ULAPlus support