Microcode-Level Emulation
The HP-11C.
Reborn.
MY11C is an HP-11C programmable scientific calculator emulator built on a different foundation. Not a simulation — a true microcode-level emulation of the original Nut processor.
Every instruction, every timing quirk, every undocumented behavior — faithfully reproduced on your iPhone, iPad, and Mac.
Why Microcode Matters
Most emulators approximate calculator behavior at a high level. MY11C operates at the deepest level possible — executing the actual microcode instructions of the original hardware.
Cycle-Accurate
Emulates the original Nut processor at the microcode level. Every calculation produces exactly the same result as the original hardware — including rounding, display quirks, and undocumented behavior.
Full Scientific
Trigonometric, hyperbolic, logarithmic and exponential functions, statistics with linear regression, permutations and combinations, plus 203 bytes of keystroke programming with labels, branches, and subroutines.
Native Experience
Built natively for Apple platforms with SwiftUI. Runs on iPhone, iPad, and Mac with a responsive interface designed for each form factor.
About the HP-11C
The Hewlett-Packard HP-11C, released in 1981 as one of the first models in the legendary Voyager series, was a programmable scientific calculator beloved by engineers, scientists, and students. With a full set of scientific functions, statistics, keystroke programming, and HP's signature RPN entry, it offered remarkable power in a slim, horizontal shirt-pocket form factor.
MY11C preserves this legacy through microcode-level emulation — not by approximating what the HP-11C did, but by running the same microcode that powered the original Nut processor. The result is an emulator that is indistinguishable from the real hardware.
Read the Full HistoryExperience the Legend
MY11C is launching soon for iPhone, iPad, and Mac. Want to know the moment it lands on the App Store?