PPU Viewer
PPU Viewer
Introduction
The NES architecture includes a 6502 CPU as well as a custom video controller known as a PPU (Picture Processing Unit). The PPU's video memory is separated from the main CPU memory and can be read/written via special ports (see PPU Memory).
The PPU viewer will display the contents of the current PPU memory. (It does not alter game data in anyway).
Using PPU Viewer
Show on Scanline
This options makes it show what the PPU looks like when the screen is drawing that scanline. It is useful for games like SMB, that swap pattern
tables mid-frame (status bar stuff).
Right clicking on one of the PPU panels cycles the palettes it is shown with, though pattern palettes and then sprite ones
Putting the mouse cursor over a tile will display the tile address. Moving cursor over palette color will give palette address.
2008
This help file has been generated by the freeware version of HelpNDoc