; NES.h
; 2003 Cye Freeman

;-----------------------------------------------------------------------------
    
; R E G I S T E R S
      
; P P U
; Picture Processing Unit

PPUCtrl0                =   $2000    ; PPU Control Register #0
PPUCtrl1                =   $2001    ; PPU Control Register #1
PPUStat                 =   $2002    ; PPU Status Register 
OAMAddr                 =   $2003    ; SPR-RAM Address Register
OAMIO                   =   $2004    ; SPR-RAM I/O Register
PPUScroll               =   $2005    ; VRAM Address Register #0
PPUAddr                 =   $2006    ; VRAM Address Register #1
PPUIO                   =   $2007    ; VRAM I/O Register

;-----------------------------------------------------------------------------

; p A P U 
; pseuedo-Audio Processing Unit

;P U L S E 0
Pulse0Ctrl              =   $4000    ; Control Register                
Pulse0Sweep             =   $4001    ; Ramp Control Register          
Pulse0FreqLo            =   $4002    ; Fine Tune Register         
Pulse0FreqHi            =   $4003    ; Coarse Tune Register       
; P U L S E 1
Pulse1Ctrl              =   $4004    ; Control Register      
Pulse1Sweep             =   $4005    ; Ramp Control Register 
Pulse1FreqLo            =   $4006    ; Fine Tune Register    
Pulse1FreqHi            =   $4007    ; Coarse Tune Register  
; T R I A N G L E
TriangleTimer           =   $4008    ; Triangle Control Register #0    
TriangleCtrl            =   $4009    ; Triangle Control Register #1       
TriangleFreqLo          =   $400A    ; Triangle Frequency Register #0   
TriangleFreqHi          =   $400B    ; Triangle Frequency Register #1     
; N O I S E                            
NoiseCtrl               =   $400C    ; Noise Control Register #0 
;UNUSED                 =   $400D    
NoiseFreq               =   $400E    ; Noise Frequency Register #0
NoiseTimer              =   $400F    ; Noise Frequency Register #1

; D E L T A   M O D U L A T I O N
; The channel of the APU which handles digital data. 
; Commonly referred to as the PCM (Pulse Code Modulation) channel.

DeltaCtrl               =   $4010   ; Delta Modulation Control Register (W)     
DC_Offset               =   $4011   ; Delta Modulation D/A Register (W)         
DeltaAddr               =   $4012   ; Delta Modulation Address Register (W)     
DeltaLength             =   $4013   ; Delta Modulation Data Length Register (W) 
SPRDMA                  =   $4014   ; Sprite DMA Register
SoundCtrl               =   $4015   ; Channel Control (w)  Sound/Vertical Clock Signal Register (R)    


; J O Y P A D S                     
PAD0                    =   $4016
PAD1                    =   $4017
;-----------------------------------------------------------------------------



; V R A M  A D D R E S S E S 

PTable0                 =   $0000  ; Pattern Table 0 (256x2x8, may be VROM)
PTable1                 =   $1000  ; Pattern Table 1 (256x2x8, may be VROM)
NameTable0              =   $2000  ; Name Table 0 (32x25 tiles)
AttribTable0            =   $23C0  ; Attribute Table 0
NameTable1              =   $2400  ; Name Table 1 (32x25 tiles)
AttribTable1            =   $27C0  ; Attribute Table 1
NameTable2              =   $2800  ; Name Table 2 (32x25 tiles)
AttribTable2            =   $2BC0  ; Attribute Table 2
NameTable3              =   $2C00  ; Name Table 3 (32x25 tiles)
AttribTable4            =   $2FC0  ; Attribute Table 3
IPalette                =   $3F00  ; Image Palette
SPalette                =   $3F10  ; Sprite Palette
Mirror2                 =   $4000  ; Mirror of $0000-3FFF
;-----------------------------------------------------------------------------
  

;Macros
; useage : SetPPUAddr $3F12        
; note if the high & low byte are the same you can save one byte by ommiting the 2nd ldx

    MAC SetPPUAddr  
    ldx #>{1}       ;High byte of address
    stx PPUAddr
    ldx #<{1}       ;Low byte of address
    stx PPUAddr
    ENDM
	

    MAC SetPPUCtrl
    ldx #>{1}      	;High byte of address 
    stx PPUCtrl0	
    ldx #<{1}       	;Low byte of address           
    stx PPUCtrl1 
    ENDM
;-----------------------------------------------------------------------------