I left Build 4 successfully running with the 65816 and 55 ns RAM. But it failed with memory corruption when I used 12 ns RAM. The problem was that occasionally during RAM writes, some address signals would change about 2 ns before the write enable signal would rise. This would result in a write to …
Continue reading “65816: Troubleshooting 3 – Revisiting the Build 4 Layout”
I worked on the Build 4 modifications over several weeks, partly because I was just playing around with what I had on hand when I started and partly getting sidetracked looking into why things happen instead of just getting on with the build. In this post I discuss troubleshooting the memory corruption issues I found. …
Continue reading “65816: Build 4 Troubleshooting 2 – Memory Corruption”