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EDA TOOLS / FSimX STUDIO
v0.8.107  ·  Linux + Windows  ·  eval

RTL simulation and debug, in one window

FSimX Studio is a desktop simulation studio that brings three WIOWIZ tools into one persistent session: the FSimX simulation engine, the vWIZ-Wave waveform debugger and vWIZ-Coverage. A load-once, run-interactively workflow, WIOWIZ-native.
FSimX enginevWIZ-WavevWIZ-Coverage
Download The FSimX engine

One persistent session, not three tools bolted together

Open a project, compile it, load it once, and drive it interactively. Hierarchy, objects, source, waveform and transcript stay live and cross-probed, so you run, break, examine and restart from a single window, without re-elaborating between runs.

FSimX Studio interface: workspace, objects, source and transcript panes
FSimX Studio 0.8.107 — the Welcome page: Workspace and Objects, the 29-example catalog, and the transcript, in one window

See it run

Short screencasts from the studio — tour a mini-SoC, catch a bad run in the RISC-V ISS, decode protocols off the wave, debug in vWIZ-Wave and close coverage in vWIZ-Coverage.

The mini-SoC tour

Load the WIOWIZ mini-SoC and drive it interactively from one session.

RISC-V ISS lockstep

The instruction-set sim runs in lockstep and flags a known-bad run.

Decode UART traffic

The transaction analyzer decodes UART frames straight off the waveform.

PCIe transactions

Follow PCIe peripheral transactions through the modelled SoC.

Waveform debug · vWIZ-Wave

Cursors, A–B deltas and cross-probe to source on a live waveform.

Coverage closure · vWIZ-Coverage

Code, functional and assertion coverage merged with formal UNR.

1  ·  Invoke the GUI and simulate

Launch the studio, open a project and run it. Every bundled example is self-checking and prints an explicit PASS in the transcript.

1
Launch the studio. Download the Docker bundle below, then ./verify.sh to build the image and ./run.sh to launch.
2
Open a project. File  ›  Open Project, then pick a .fsp (counter, ALU, FIFO, traffic FSM, UART, a multi-master bus, a UVM memory, or a multi-domain low-power SoC).
3
Run All. The design compiles, elaborates and runs; the hierarchy and objects light up and the waveform opens automatically. Restart returns to t=0 without recompiling.
# build the image from the bundle, then launch
cd fsimx-studio-public
./verify.sh
./run.sh
# then File › Open Project › examples/sv/counter/counter.fsp → Run All

2  ·  Debug with vWIZ-Wave

The waveform opens on the same loaded design. vWIZ-Wave subscribes only to the signals you are watching, so it stays responsive on SoC-scale designs with tens of thousands of signals, and cross-probes between the wave, the source and the hierarchy.

vWIZ-Wave waveform debugger with source, waveform canvas, cross-probe and transaction analyzer
vWIZ-Wave on a RISC-V SoC, source with inline values, waveform, cross-probe and the transaction analyzer
Add signals from the filtered signal list, drop cursors and named markers, jump edge to edge, and annotate. Click a signal to cross-probe straight to its driver in the source. Decode bus traffic in the transaction analyzer, and reconstruct memories in the viewer. FST stays the archival format.

3  ·  Close with vWIZ-Coverage

The same run feeds vWIZ-Coverage. Code, functional and assertion coverage merge with formal unreachable (UNR) analysis into one closure picture, so you finish with evidence rather than assumptions.

vWIZ-Coverage metrics dashboard on the mini-SoC example
vWIZ-Coverage closure on the WIOWIZ mini-SoC, code, toggle, FSM and functional coverage with UNR
More on vWIZ-Coverage More on vWIZ-Wave

Download  v0.8.107

The same studio, your platform — Linux as a Docker bundle or a native Windows build. No installer to run, nothing on your machine to trust beyond the container. You always get the latest release.

Linux · Docker bundle Recommended
v0.8.107 · 2026.07 eval · 10 MB · x86-64 / WSL2 · .tar.gz
SHA256 88465e040ed62b005ea70335ff6613045efd46bc2aaed8b0884642940ee76e1e
# unpack, verify + build the image, launch
tar -xzf fsimx-studio-public-2026.07-docker.tar.gz
cd fsimx-studio-public && ./verify.sh && ./run.sh
Windows · native build New
v0.8.107 · x64 · Windows 10 / 11 · no installer
Final license-control checks in progress — available on request
# unzip and launch
Expand-Archive fsimx-studio-0.8.107-win-x64.zip
cd fsimx-studio-win && .\run.bat
Request Windows build
What’s inside — README & release notes
Feature list, what changed in 0.8.107, the examples catalog and how to run.
Read the README →
What it is. Linux runs as a Docker container; the native Windows build is in final license-control checks and available on request. You always download the latest release. For licensing and support, email support@wiowiz.com.

At a glance

Version 0.8.107 (eval) — you always download the latest release
What it is Desktop RTL simulation and debug studio (FSimX engine, vWIZ-Wave, vWIZ-Coverage)
Workflow Project, compile, elaborate, load once, run interactively, break, examine, force, restart without re-elaboration
Waveform vWIZ-Wave, subscribe-only tracing, cross-probe to source and hierarchy, transaction analyzer, FST archival
Coverage vWIZ-Coverage, code, functional and assertion coverage with formal UNR closure
Platforms Linux x86-64 (Docker image) and native Windows x64 (Windows 10 / 11)
Support support@wiowiz.com
Download FSimX Studio README & release notes All EDA tools