Register - Active Features

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

Debug Display

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.