S-PPU1

S-PPU1 is the first of the two PPUs in 2chip consoles. It has part number 21322. Little is known about how S-PPU1 works; for most regions of the die there is only speculation about their function.

S-PPU1 die shot with regions numbered

Legend

• 1 & 2 - OAM
• 5 & 6 - Sprite Line Buffer
• 10 - combining sprite + layer?
• 12 - registers?

See Also

• S-PPU2

References

• https://forums.nesdev.org/viewtopic.php?p=279840#p279840