Calc-U-59
Calc-U-59 Calculator Emulation
About
Explore the inner workings of classic TI-59, TI-58, and TI-58C calculators. This tool offers cycle-accurate emulation, a debugger to inspect code and registers, and a functional paper tape printer recreation. Load and save programs using magnetic card emulation and state files.
What's New in Calc
1.5.0
July 7, 2026
• PRINTER: Dot-matrix output now correctly supports printer-interrupt, also known as "High Rez Graphics". This is a hack documented in the 1982 magazine "PPX Exchange". Check the GitHub repository for the example state file "texas-print.ti59". FIXES • PRINTER: Multiple blank-line errors fixed (ADV button). Blank lines now match the real PC-100A/B/C exactly. • DEBUG LOG: Fixed out-of-memory crash and GUI slowdown when the LOG panel is active at DEBUG level.
MoreFAQ
What classic calculators does Calc-U-59 emulate?
Calc-U-59 emulates the TI-59, TI-58, and TI-58C calculators. It provides cycle-accurate emulation of the TMC0501 processor, including the TI-58C's constant memory feature.
Can I debug programs with Calc-U-59?
Yes, Calc-U-59 features an integrated debugger. You can inspect program memory, data registers, CPU state, and internal SCOM registers live, and step through instructions.
Does Calc-U-59 have a printer simulation?
Yes, Calc-U-59 includes a functional recreation of the PC-100C thermal printer. You can trace printed output and copy it as plain text or a high-resolution bitmap.
How can I load and save programs in Calc-U-59?
You can load and save programs and data registers using the magnetic card reader emulation, which stores them as card files on your device and syncs via iCloud. State files (.ti59, .ti58(c)) can also be loaded for instant machine configuration.
What devices is Calc-U-59 available on?
Calc-U-59 is available on iPad (in landscape mode) and Mac. It is rated for ages 4+.
How often is Calc-U-59 updated?
The latest version, 1.3.0, was last updated on June 20, 2026. The app was released on May 5, 2026, indicating a relatively frequent update schedule.
Does Calc-U-59 have ads?
No, Calc-U-59 does not contain advertisements. It is a free application focused on research and emulation.
What is the user sentiment for Calc-U-59?
Calc-U-59 has a perfect rating of 5.0 stars from 1 review, indicating very positive initial user sentiment.