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 ; this Enable the GAMMA correction - The Analog and DVI have different color value, 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