> What does "discrete logic" mean in this case? 74xx series ICs (eg. 74ACT family in case of the cpu, if I read correctly). More generally, it may refer to "b

> What does "discrete logic" mean in this case? 74xx series ICs (eg. 74ACT family in case of the cpu, if I read correctly). More generally, it may refer to "basic logic elements whose function is easily inspected". > Why would this prevent interrupts? Not at all - in theory. In practice, interrupt support tends to complicate cpu designs. Complicate = more logic = more ICs. So builder decided against it & chose not to implement interrupts on the cpu.