Control Page

The Control Page is a page of memory that is devoted to connecting to other parts of NerdConsole. All of the other systems that can be addressed are collected in the Control Page to ensure the maximum amount of contiguous available memory. The Control Page gives access to the controllers, audio, RAM and ROM banking, and the graphics system.

Control Page Map ($02xx)

	0	1	2	3	4	5	6	7	8	9	A	B	C	D	E	F
0x	W	R	W	W	W	W	W	W	-	-	-	-	-	-	-	-
1x	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
2x	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
3x	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
4x	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
5x	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
6x	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
7x	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
8x	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W
9x	W	W	-	-	-	-	-	-	W	-	-	-	-	-	W	W
Ax	W	W	-	-	-	-	-	-	W	W	W	W	-	-	-	-
Bx	W	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
Cx	W	W	W	W	W	W	W	W	R	R	R	R	R	R	R	R
Dx	W	R	-	-	-	-	-	-	-	-	-	-	-	-	-	-
Ex	W	W	-	-	-	-	-	-	W	W	W	-	-	-	-	W
Fx	W	W	-	-	-	-	-	-	W	W	W	-	-	-	-	W

Key

Color	Address	Description
	$0200	Input Latch/Clock
	$0201	Input Data
	$0202	Audio Address Flag
	$0203	Audio Address/Data
	$0204	Main RAM Select
	$0205	Extended RAM Select
	$0206	Low ROM Select
	$0207	High ROM Select
	$0280 - $0283	Scroll Register (BG0)
	$0284 - $0287	Scroll Register (BG1)
	$0288 - $028B	Scroll Register (BG2)
	$028C - $028F	Scroll Register (BG3)
	$0290	Fixed Regions Top/Bottom
	$0291	Fixed Regions Left/Right
	$0298	Name Table Select
	$029E	Tileset Read Select
	$029F	Tileset Write Select
	$02A0	Background Color Cycle Speed
	$02A1	Sprite Color Cycle Speed
	$02A8	Background Tileset Cycle Speed
	$02A9	Background Tileset Cycle Limit
	$02AA	Sprite Tileset Cycle Speed
	$02AB	Sprite Tileset Cycle Limit
	$02B0	Last Sprite
	$02C0 - $02C7	Special Command Parameters
	$02C8- $02CF	Special Command Returns
	$02D0	Special Command
	$02D1	Special Command Status
	$02E0	Bitmap Config
	$02E1	Bitmap Control
	$02E8 - $02EA	Bitmap Address
	$02EF	Bitmap Data
	$02F0 - $02F1	Debug Display
	$02F8 - $02FA	Active Features
	$02FF	Graphics Mode