For those of you who might not get the significance, workbench loads a number of libraries into the extended fast memory on bootup. As you can see in this image below, more fast memory is actually being used than the...
Latest articles
Found potential race condition on writes
After looking at datasheets for the 273 latches used and 74act74 flipflop used, the worst case propagation delay is something like 12.3ns. But my NAND gate ACT00 logic which is triggered by the same CAS signals has a...
PCBs have arrived!
Just in time for Christmas, the PCBs have arrived from China. I used Seeed Studio (Fusion PCB Service) and they look pretty good. Here’s the first look at them. I’m just about to solder one up, so wish me...
Found problems with incorrect footprints used for some chips
So I received all of the SMT parts today, and attempted to verify that I’ve used the right footprints for the parts. This was a worthwhile effort because I found a few different problems. Also, digi-key shipped me...
Moving from prototype on a solderless breadboard to PCB soon
So I’ve got a reasonable number of memory tests passing with the prototype solderless breadboard. There are some minor issues that are mostly related to the stability: Sometimes my memory board steps on the built...
