Z80 System emulator/debugger

This home made tool for debuging and testing very old Z80 based industrial computers. For the fun, the program can run ZX Spectrum computer, Радио РК86 and Орион-128 computers in some sort "logic emulation mode" (not realtime).

Small screen:
multitool
Current download may differ a bit for this screenshot as program is improved frequently.
Current version can:

Emualte 8080/Z80 using two modes
Emulate ZX Spectrum screen
Emulate Орион 128 B/W screen
Emulate Радио РК86 screen (simplified i8275)
Emulate ZX Spectrum ULA keyboard
Emulate i8255 (not very)
"Realtime" memory writer/reader
Software MMU for configuration tricks
Save/load program state to file
Save/load (dump) all RAM, parts of RAM
Fill RAM with value
Save/load ZX Spectrum snapshots
Full control of ALL CPU registers at any time
Step, multi step and "run" mode
Manual or "frame" INT (without options)
Very simple dissassembler
Very simple assembler compiler

This software can run any combined configuration- you can enable all screens, keyboards, chips at same time! Or remove and add any hardware at any moment, even without stopping CPU.

This tool was designed to debug/decode/hack very old, damaged industrial computer and port it to "new" Z80 CPU board. As emulator is written in Visual Basic and all the source code is availavle (for me) it was much easier to catch all I/O.
This is ALWAYS BETA software and for internal use only. No warranty.

ZX Spectrum mode:
zx spectrum debug

Radio RK86 mode:

Assembler/Dissassembler/Debug mode:

Install exe file

MS Visual studio default publish page.