Unlike modern consoles or PCs, classic arcade machines were not designed for easy software updates. Their primary method for changing games was physical hardware replacement. The game software was stored on Read-Only Memory (ROM) chips soldered onto a Printed Circuit Board (PCB). To change the game, an operator would often need to replace the entire game PCB with a new one containing the desired game. This was a significant investment. For minor fixes or regional variations, technicians could sometimes desolder and replace individual ROM chips with updated versions, a delicate and time-consuming process. Some later systems, like the Neo Geo MVS, used cartridges, allowing operators to swap games more easily. Modern arcade machines, however, often function like specialized computers. They may use solid-state drives, network connectivity, or USB drives for updates, allowing developers to patch bugs or add content remotely, similar to home gaming systems. Emulation is also common, where a powerful base system runs software that mimics the original arcade hardware, making game changes as simple as loading a new file. Therefore, the approach varies drastically between the physical, hardware-centric past and the software-driven present.