https://dean.sellers.id.au/tags/testing/ Recent content in Testing on Ampsand Hugo en-AU Dean Sellers Thu, 29 Oct 2026 12:04:08 +1100 https://dean.sellers.id.au/2026/10/18/riscv-02-tests-that-can-fail/ Sun, 18 Oct 2026 18:00:00 +1100 https://dean.sellers.id.au/2026/10/18/riscv-02-tests-that-can-fail/ <p class="post-subtitle">Tests that can fail, and a RAM that was never there</p><p><em>Part 2 of the RISC-V soft core series. Previously: <a href="https://dean.sellers.id.au/2026/10/18/riscv-01-a-cpu-you-can-watch/">A CPU you can watch</a>.</em></p> <p>A light that sweeps along a row of LEDs is a nice demo and a poor proof. It tells me that a handful of instructions work in one order. It says nothing about all the others, or about the edges of the ones I used. If this core is going to run real code I need to be able to trust it, and I need to know <em>how much</em> I can trust it.</p>