Tiny Tapeout, simulated in the browser.

The Tiny Tapeout demo board, with 8 switches and a 1 digit 7-segment display. RTL++ simulates the design with the board's parts around it.

Tiny Tapeout at a glance
Board	Device	Clock	Logic cells	Block RAM	In the browser	Flash over USB
Tiny Tapeout demo board	ASIC, no FPGA	10 MHz	None	None	Simulation	No

Silicon, not an FPGA. A project is built for the shuttle, so this board runs in simulation only.

Pin map

Every pin is checked against the vendor's constraint file, so a constraint interface written from it matches the board.

Tiny Tapeout demo board pins
Signal	Kind	Direction	Active
clk	Clock, 10 MHz	Input	High
rst_n	Reset	Input	Low
ena	Reset	Input	High
ui0	Switch	Input	High
ui1	Switch	Input	High
ui2	Switch	Input	High
ui3	Switch	Input	High
ui4	Switch	Input	High
ui5	Switch	Input	High
ui6	Switch	Input	High
ui7	Switch	Input	High

Also mapped: 8 PMOD pins.

Do I need to install a toolchain?

No. Icarus Verilog and Yosys run in the browser as WebAssembly, so the design simulates with nothing installed.