# Yosys Open Synthesis Suite: Yosys 0.69

> **Key Architectural Takeaway:** Yosys 0.69 Commands and options Removed sum of products related parameters from "abc" pass.

**Published:** 2026-09-09T05:58:40+00:00  
**Source:** Yosys Open Synthesis Suite  
**Category:** open-hardware  
**Canonical URL:** https://fosswire.org/news/yosys-open-synthesis-suite-yosys-069.html  

## Executive Summary
Yosys 0.69 Commands and options Removed sum of products related parameters from "abc" pass. Removed coolrunner2 and greenpak4 synthesis and related passes. Removed "nlutmap" pass. Removed "-retime", "-noabc9", "-abc2" and "-abc" options from synthesis passes. Removed "-[no]stderr" from "logger" pass. Various verific: Added "-sv2023" flag option to support System Verilog 2023.

## Architectural & Systems Analysis
From a silicon and hardware engineering viewpoint:

- **Interface Neutrality:** Mitigates dependency on proprietary BSPs, empowering open toolchains to address hardware directly.
- **Supply Chain Verification:** Schematics and open pinouts allow deterministic audits against silicon errata.
- **Lifecycle Decoupling:** Decouples physical hardware utility from commercial vendor end-of-life obsolescence.

## Impact on the Open Ecosystem
Ensures that computational autonomy remains in the hands of the architect rather than closed silicon vendors.