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VX-3 emulator

The program emulates the HD61700 microprocessor and uses the ROM dump from the original calculator, therefore it should function almost exactly like the real one.
It works on PC-compatible machines with Microsoft Windows operating system.

Files to download

Program version 03, updated 2023/12/15 - Delphi 5 sources - compiled executable
Usage: extract the files into an empty directory, then run the program vx3.exe

The screenshots

Screenshot of the VX-3 emulator

The debug window of the VX-3 emulator

The communication utility window of the VX-3 emulator

Usage hints

Integrated debugger

Disassembly box

Hex Editor box

Registers box

Main register file box

Program execution control

The vx3.ini file

Some parameters of the emulator can be customised by editing the vx3.ini file with any text editor.
Description of the contents of this file:

OscFreq = 910
This setting specifies the emulated CPU clock frequency in kHz.


To uninstall the emulator, simply delete the directory where it was installed. The program doesn't modify anything outside its installation directory.


Known limitations and issues of the current version