Scattered Progress Is Still Progress

I&rsquo;ve been bouncing around a lot. After confirming my new bus interface was working on my wire-wrap prototype, I built out the DRAM card. It … mostly works. It will work just fine for a few thousand back-to-back transactions and then it just randomly locks up. The CPLD running its timing sequence will freeze on one state and stop responding to any further input. I managed to chase down a few…