![]() Many devices are competing for access to the memory access logic, and screen refresh is especially urgent. Everything comes from that one memory array, with one memory access logic. The MacBook Pro M1 memory features a "unified" memory design. In addition, each one-pixel-tall Row must be fetched on a much tighter schedule within one row-time, or part of the row will be blank. The entire screen data MUST be completed within each screen refresh interval (often 1/60th second) or the screen will go partially or completely blank without the late or missing data. Once set up, data are fetched at that same interval again and again without additional intervention. The spec was available long before you could purchase the computer.įetching screen data is done by rasterizer/display-generator Hardware in the graphics subsystem. This may not match the way older computers forced you to work, since older computers were not able to support a really large external display. ![]() But only ONE in addition to the internal display. They can support the internal display AND an External display up to the previously unheard of size of the Apple 6K display at billions of colors. The Apple-Silicon M1 MacBook Pro and Air are extremely-capable entry-level computers.
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