VICKY

VICKY - the graphics engine

"Vicky" is the name of the graphics engine of the C256 Foenix. It supports:

• 640x480@60FPS Max Resolution @ 256 Colors (1 Byte Per pixel)
• 32 Sprites with a resolution of 32x32 pixel
• 4 layers of tiles with a resolution of 16x16 for each tile
• Text Mode

Modes

Modes are enabled and disabled via the Vicky Master Control Register at $AF0000 via the control bits:

• Mstr_Ctrl_Text_Mode_En = $01 ::Enable the Text Mode
• Mstr_Ctrl_Text_Overlay = $02 ::Enable the Overlay of the text mode on top of Graphic Mode (the Background Color is ignored)
• Mstr_Ctrl_Graph_Mode_En = $04 ::Enable the Graphic Mode
• Mstr_Ctrl_Bitmap_En = $08 ::Enable the Bitmap Module In Vicky
• Mstr_Ctrl_TileMap_En = $10 ::Enable the Tile Module in Vicky
• Mstr_Ctrl_Sprite_En = $20 ::Enable the Sprite Module in Vicky
• Mstr_Ctrl_GAMMA_En = $40 ::Enable the GAMMA correction - The Analog and DVI have different color values, the GAMMA is great to correct the difference
• Mstr_Ctrl_Disable_Vid = $80 ::This will disable the Scanning of the Video hence giving 100% bandwith to the CPU