What Is Greenforest I/O?
Greenforest I/O develops working computational mechanisms across streaming FPGA arithmetic, one-pin radio, Ethernet RTL, raw WebGL and GLSL systems, Cartilage, physical logic, and semiconductor research.
What Value Does Brian Greenforest Create?
Brian crosses software, hardware, radio, GPU, and physical boundaries to turn hidden timing, state, routing, signal flow, and material constraints into complete mechanisms that teams can build, run, and extend.
What Is The Bubbles-Free Bit-Serial Multiplier?
The 64-bit SystemVerilog core accepts operands least-significant bit first and starts another low-product operation every 64 clocks. At 216 MHz it delivers 3.375 million products per second from 254 LUT4s and 635 flip-flops; 12 cores fit the HX8K for 40.5 million products per second.
What Is The Binary32 Serial Divider?
Binary32 Serial Divider: 6.75 Million Divisions/s accepts raw IEEE binary32 operands LSB first and computes through one-bit significand, exponent, and sign streams. At 216 MHz it accepts a finite-normal division every 32 clocks and publishes the open RTL, rebuild files, utilization, exact integer oracle, bitstream, and physical run data.
What Is The 106-Channel One-Pin FPGA Transmitter?
One FPGA Pin Synthesizes 106 RF Channels Across 3 MHz advances 106 independent 24-bit lane phases, gives them deterministic FM motion, reduces their complex sum through continuous one-bit I/Q arithmetic, and switches the complete RF result through N16.
The article inspects the entire 882-line top from channel mask to physical pin. Its MIT-licensed download includes every required SystemVerilog file, board and timing constraints, build and volatile-SRAM load scripts, hardware notes, and the ready-to-load one-second image.
What WebGL And GLSL Work Has Brian Done?
The raw WebGL1 and GLSL ES 1.00 systems create contexts, compile shaders, pack state into textures, execute through framebuffer passes, ping-pong updates, and read results back. The same machinery drives cellular automata, logic, arithmetic, and Cartilage-style spatial computation directly in the browser.
What FPGA Systems Has Brian Built?
The FPGA systems map spans the 106-channel one-pin transmitter, 64-bit continuous serial multiplication, binary32 division through one-bit arithmetic, one-pin FPGA FM reception, RMII Ethernet and ARP in direct Verilog, UDP-carried bitstream ingestion, one FPGA configuring an adjacent iCE40LP384, and Cartilage in SystemVerilog and WebGL.
Each system follows the causal path through pins, protocols, clocks, RAM, configuration, host software, and physical signals so another engineer can enter at the level that controls the outcome.
How Can I Start Learning FPGAs And Verilog?
Start with All Things All The Time: FPGA And Verilog From First Principles. The course moves from Boolean logic and visible Logisim circuits into FPGA LUTs and flip-flops, Verilog modules, self-checking testbenches, constraints, waveforms, synthesis, place-and-route, bitstreams, and an iCE40 board.
What Are The Physical MUX Tiles?
The physical MUX tiles turn inputs, constants, selectors, routes, intersections, orientation, topology, and connector geometry into a fabricated PCB alphabet. Learners can compose logic by hand, connect it to Logisim, climb through LUT1–LUT6, and recognize the same selection structure inside an FPGA.
What Is Cartilage And Where Should I Start?
Cartilage is the larger program for local, spatially reconfigurable computation. Start with the ordered Cartilage learning path: LUTs, CMOS gain and drivers, clock and event distribution, state machines, timing closure, routing metal, nested composition, and runtime reconfiguration in space. Then choose a renderer, ownership, recovery, or simulator package in the Cartilage roadmap to fund or build with Brian.
What Can I Run In Cartilage Core?
Cartilage Core gives you a WebGL1 model, hardware paper, SystemVerilog RTL, and self-checking Verilator testbench. Both implementations run the same 252-bit circuit installation and four AND truth-table rows, so you can follow one complete configuration transaction from source through installed behavior.
What Does The Greenforest I/O Name Represent?
Brian Greenforest develops the engineering and invention practice Greenforest I/O professionally through Solid State Pros LLC.
What Opportunities Fit, And How Do I Make Contact?
Strong fits include funded R&D, product architecture, implementation, collaboration with FPGA or semiconductor teams, fabrication or laboratory access, technical due diligence, licensing, and principal roles that cross software, hardware, radio, and active-device boundaries.
Email brian@solidstatepros.com with the system, blocked outcome, and opportunity shape. Choose a concrete engagement path.