wiki wrote:
# Cycles 256-319: Sprite fetches (8 sprites total, 8 cycles per sprite)
* 1-4: Read the Y-coordinate, tile number, attributes, and X-coordinate of the selected sprite
* 5-8: Read the X-coordinate of the selected sprite 4 times.
* On the first empty sprite slot, read the Y-coordinate of sprite #63 followed by $FF for the remaining 7 cycles
* On all subsequent empty sprite slots, read $FF for all 8 reads
* 1-4: Read the Y-coordinate, tile number, attributes, and X-coordinate of the selected sprite
* 5-8: Read the X-coordinate of the selected sprite 4 times.
* On the first empty sprite slot, read the Y-coordinate of sprite #63 followed by $FF for the remaining 7 cycles
* On all subsequent empty sprite slots, read $FF for all 8 reads
- Is this "read" a 2004h read OR the usual PPU "read-and-throw-away"?
- Is this the MMC3 IRQ clocking period?