PCjs Machines

Home of the original IBM PC emulator for browsers.


Texas Instruments TI-42 "MBA"

The TI MBA “electronic business calculator” was produced in 1977 and marketed by Texas Instruments in the United States as “The MBA”, whereas in Europe it was called the “TI-42 MBA”. Here, we’ll simply call it the TI-42.

Building on the PCjs TI-57 Emulator, the PCjs TI-55 Emulator is now available, with optional Diagnostics.

TI-42 Programmable Calculator

Additional PCjs resources include:

Additional third-party resources include: