View source for Register - Active Features

The active features register controls which parts of the PPU program are enabled.

=== Active Features ===
{| class="wikitable"
! Bit !! 7 !! 6 !! 5 !! 4 !! 3 !! 2 !! 1 !! 0
|-
! $02F8
| D || GBG || SD0 || SD1 || BG0 || BG1 || BG2 || BG3
|-
! $02F9 
| BCC || SCC || BTC || STC || BTS || STS || FR || SC
|-
! $02FA
| SX0 || SY0 || SX1 || SY1 || SX2 || SY2 || SX3 || SY3
|}

''' Key '''
* D - Debug Output
** 0 = Disable Debug Display
** 1 = Enable Debug Display (FPS, Timings, Memory, etc.)
* GBG - Global Background Color 
** 0 = Disable Global Background, always uses black.
** 1 = Enable Global Background
* SD0 - Normal Sprites (when Sprite Depth flag is 0) 
** 0 = Disable Normal Sprites
** 1 = Enable Normal Sprites
* SD1 - Background Sprites (when Sprite Depth flag is 1)
** 0 = Disable Background Sprites
** 1 = Enable Background Sprites
* BG0 - Main Background
** 0 = Disable Background, not rendered.
** 1 = Enable Background
* BG1 - Background 2
** 0 = Disable Background, not rendered.
** 1 = Enable Background
* BG2 - Background 3
** 0 = Disable Background, not rendered.
** 1 = Enable Background
* BG3 - Background 4
** 0 = Disable Background, not rendered.
** 1 = Enable Background
* BCC - Background Color Cycling
** 0 = Disable Background Color Cycling, ignores background parts of color cycle registers.
** 1 = Enable Background Color Cycling
* SCC - Sprite Color Cycling
** 0 = Disable Sprite Color Cycling, ignores sprite parts of color cycle registers.
** 1 = Enable Sprite Color Cycling
* BTC - Background Tileset Cycling
** 0 = Disable Background Tileset Cycling, ignores background cycle range and speed registers.
** 1 = Enable Background Tileset Cycling
* STC - Sprite Tileset Cycling
** 0 = Disable Sprite Tileset Cycling, ignores sprite cycle range and speed registers.
** 1 = Enable Sprite Tileset Cycling
* BTS - Background Tileset Select
** 0 = Disable Background Tileset Select always uses 0 for the main background.
** 1 = Enable Background Tileset Select.
* STS - Sprite Tileset Select
** 0 = Disable Sprite Tileset Select, ignores tileset select registers, always uses set 0.
** 1 = Enable Sprite Tileset Select.
* FR - Fixed Regions (Main Background)
** 0 = Disable Fixed Regions for the Main Background, fixed region name table is ignored.
** 1 = Enable Fixed Regions for the Main Background
* SC - Special Commands
** 0 = Disable Special Commands
** 1 = Enable Special Commands
* SX0 - Scrolling X-Axis
** 0 = Disable Horizontal Scrolling on the Main Background, always scroll position 0.
** 1 = Enable Scrolling on the Main Background X-Axis
* SY0 - Scrolling Y-Axis
** 0 = Disable Vertical Scrolling on the Main Background, always scroll position 0.
** 1 = Enable Scrolling on the Main Background Y-Axis
* SX1 - Scrolling X-Axis
** 0 = Disable Horizontal Scrolling on Extra Background 1, always scroll position 0.
** 1 = Enable Scrolling on Extra Background 1 X-Axis
* SY1 - Scrolling Y-Axis
** 0 = Disable Vertical Scrolling on Extra Background 1, always scroll position 0.
** 1 = Enable Scrolling on Extra Background 1 Y-Axis
* SX2 - Scrolling X-Axis
** 0 = Disable Horizontal Scrolling on Extra Background 2, always scroll position 0.
** 1 = Enable Scrolling on Extra Background 2 X-Axis
* SY2 - Scrolling Y-Axis
** 0 = Disable Vertical Scrolling on Extra Background 2, always scroll position 0.
** 1 = Enable Scrolling on Extra Background 2 Y-Axis
* SX3 - Scrolling X-Axis
** 0 = Disable Horizontal Scrolling on Extra Background 3, always scroll position 0.
** 1 = Enable Scrolling on Extra Background 3 X-Axis
* SY3 - Scrolling Y-Axis
** 0 = Disable Vertical Scrolling on Extra Background 3, always scroll position 0.
** 1 = Enable Scrolling on Extra Background 3 Y-Axis

This register is a part of the [[Control Page]].