The Motorola 68010 CPU has what is called an asyncronous bus. Fancy word, but what does it mean? In simple terms there is two ways of doing things; syncronous or asyncronous. Syncronous means that all involved peaces needs to be in sync in such an way that when […]

So, after putting the CPU in an breadboard, it’s time to start thinking about how memory, ROM and peripherals should be addressed. Now, there are som considerations here that makes things more or less complicated. For this, we need to understand what the CPU does when powered on. […]

All CPUs needs to be powered on correctly, and m68k is no different. Just supplying power is not enough, and the CPU needs some things to ensure registers are cleared, and CPU prepared to start executing. But before that, let us look at how an CPU actually do […]