Extended emulator of МК 61/54

Relive the 1980s with this emulator of the iconic USSR MK-61/54 calculators. It replicates the original microcode, including quirks and undocumented features. Save/load states, toggle speed, and switch between MK-61/MK-54. Import programs from external files and enjoy UI improvements. Based on Felix Lazarev's emu145 project, optimized for real-time performance on any phone.