I have a question about the Mano base computer. The state diagram, shown below, implies that the output device will set the FGO flag to "1" after the job is done to continue the output activity from the PC (and to zero when device is busy).
But in most cases we don't have anything to do with the output and the flag stays at "1" and the cycle enters the interrupt routine every time. It seems like this leads to the computer running the interrupt routine most of the time.
Is this a bug in this system or am I missing something?