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Sprite Line Buffer
From SnesLab
The Sprite Line Buffer is where sprites are pre-rendered to during hblank before being compositied together with the backgrounds. It is 256 pixels wide, and a total of 2304 bits. Internally, it is composed of two 128x9-bit half-line buffers (1152 bits each): one storing even-numbered pixels and the other odd. For each pixel, each half-line buffer stores:
- four bits of color data
- three bits for palette number
- two priority bits
Each of these half-line buffers are clocked at 10.7 MHz (X1/2 divider) during writes and have their own address lines.