Microcode-Level Emulation
The TI-57.
Reborn.
MY57 is a microcode-level emulator of the Texas Instruments TI-57 programmable calculator. Not a simulation — a true microcode-level emulation of the original TMC1501 processor.
50 program steps, 8 memory registers, Learn-mode programming with branches and subroutines — faithfully reproduced on your iPhone, iPad, and Mac.
iPhone · iPad · Mac
Free 28-day trial, then a one-time $4.99
Why Microcode Matters
Most emulators approximate calculator behavior at a high level. MY57 operates at the deepest level possible — executing the actual microcode instructions of the original hardware.
Cycle-Accurate
Emulates the original TMC1501 4-bit processor at the microcode level. Every calculation, every display quirk, produces exactly the same result as the original hardware.
Full Programmability
50 steps of Learn-mode program memory and 8 addressable data registers, with GTO, subroutines (SBR), and conditional loops (Dsz) — exactly as on the original keyboard.
Native Experience
Built natively for Apple platforms with SwiftUI, with a saved-program library and iCloud sync. Runs on iPhone, iPad, and Mac with a responsive interface designed for each form factor.
Everywhere You Need It
Available on iPhone, iPad, and Mac.
iPhone
iPad
Mac
About the TI-57
The Texas Instruments TI-57, launched in 1977 alongside the card-programmable TI-58 and TI-59, was the accessible member of the family — no magnetic card reader, but the same Learn-mode keystroke programming in a lighter, more affordable package. It shipped with the "Making Tracks Into Programming" workbook and introduced a generation of students and engineers to programmable calculators.
MY57 preserves this legacy through microcode-level emulation — not by approximating what the TI-57 did, but by running the same microcode that powered the original TMC1501 processor. The result is an emulator that is indistinguishable from the real hardware.
Read the Full HistoryExperience the Legend
MY57 is available now for iPhone, iPad, and Mac — free 28-day trial, then a one-time $4.99.