1   SystemBus

There are two copies of SystemBus, both paralely conected. Either one, or both may be used to stack with other PCBs like retrocomputer or another cards together. I will use female/male connectors (socket with long legs) in the inner position, but it is also possible to use pins downwards and socket upwards, alternation positions, if the F/M connectors are ont available or practical.

The SystemBus contains the usual common power, 8bits Data and 16bits Address, then communication with GLUE divided to A and B parts and rest of pins is reserved for signals (like MasterReset).

MasterReset is used for reseting all connected PCBs, while normal Reset resets only this PCB without affecting others.

view from side with sockets in outer and pins in inner holes