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;  Let's start a little library for naming parts of memory in the NES
;  
;  Including this file will not emit any instructions or data into your binary
;  It only defines symbols in the symbol table to name memory addresses
;
;  Author: Saf Allen 2015
;  I picked up some extra register names for mappers etc here:
;  http://wiki.nesdev.com/w/index.php/Registers
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.org $0000
.scope nes
  .scope ppu
    .org $2000
    .space control1 1                             ; $2000
    .space control2 1                             ; $2001
    .space status 1                               ; $2002
    .org $2005
    .space scroll 1                               ; $2005
  .
  .org $2003
  .scope sprite
    .space address 1                              ; $2003
    .space io 1                                   ; $2004
    .org $4014
    .space dma 1                                  ; $4014
  .
  .org $2006
  .scope vram
    .space address 1                              ; $2006
    .space io 1                                   ; $2007
  .

  ;  Now let's do the APU registers
  .org $4000
  .scope apu
    .scope pulse1
      .space control 1                             ; $4000
      .space ramp_control 1                        ; $4001
      .space ft 1                                  ; $4002
      .space ct 1                                  ; $4003
    .
    .scope pulse2
      .space control 1                             ; $4004
      .space ramp_control 1                        ; $4005
      .space ft 1                                  ; $4006
      .space ct 1                                  ; $4007
    .
    .scope triangle
      .space control1 1                            ; $4008
      .space control2 1                            ; $4009
      .space freq1 1                               ; $400A
      .space freq2 1                               ; $400B
    .
    .scope noise
      .space control1 1                            ; $400C
      .space control2 1                            ; $400D
      .space freq1 1                               ; $400E
      .space freq2 1                               ; $400F
    .
    .scope dmc
      .space control 1                             ; $4010
      .space da 1                                  ; $4011
      .space address 1                             ; $4012
      .space dl 1                                  ; $4013
    .
    .org $4015
    .space channel_enable 1                        ; $4015
  .
  .org $4016
  .space controller1 1                             ; $4016
  .space controller2 1                             ; $4017
  .scope mapper
    .org $8000
    .space unrom 1                                 
    .org $8000
    .space cnrom 1
    .org $8000
    .space mmc1_control 1
    .org $A000
    .space mmc1_vrom_low 1
    .org $C000
    .space mmc1_vrom_high 1
    .org $E000
    .space mmc1_prog 1
    .org $8000
    .space mmc3_command 1
    .space mmc3_page 1
    .org $A000
    .space mmc3_mirror 1
    .space mmc3_sram 1
    .org $C000
    .space mmc3_clock 1
    .space mmc3_latch 1
    .org $E000
    .space mmc3_clock_off 1
    .space mmc3_clock_on 1
  .
.

; Let's put PC back somewhere sane
.org $0000