git.sur5r.net Git - cc65/blob - asminc/pce.inc

   1 ;
   2 ; PCE definitions. By Groepaz/Hitmem.
   3 ;
   4
   5 ; FIXME: optimize zeropage usage
   6 CURS_X          = $30
   7 CURS_Y          = $31
   8 SCREEN_PTR      = $32           ;2
   9 CHARCOLOR       = $34
  10 RVS             = $35
  11 BGCOLOR         = $36
  12 tickcount       = $37           ;4
  13
  14 ; FIXME: screen dimensions my change according to selected video mode
  15 screenrows      = (224/8)
  16 charsperline    = 61
  17
  18 CH_HLINE        = 1
  19 CH_VLINE        = 2
  20
  21 ; huc6270 - Video Display Controller (vdc)
  22
  23 VDC_MAWR        = 0             ; Memory Address Write Register
  24 VDC_MARR        = 1             ; Memory Address Read Register
  25 VDC_VWR         = 2             ; VRAM Write Register
  26 VDC_VRR         = 3             ; VRAM Read Register
  27 VDC_CR          = 4             ; Control Register
  28 VDC_RCR         = 5             ; Raster Counter Register
  29 VDC_BXR         = 6             ; Background X-Scroll Register
  30 VDC_BYR         = 7             ; Background Y-Scroll Register
  31 VDC_MWR         = 8             ; Memory-access Width Register
  32 VDC_HSR         = 9             ; Horizontal Sync Register (?)
  33 VDC_HDR         = 10            ; Horizontal Display Register (?)
  34 VDC_VPR         = 11            ; (unknown)
  35 VDC_VDW         = 12            ; (unknown use)
  36 VDC_VCR         = 13            ; (unknown use)
  37 VDC_DCR         = 14            ; (DMA) Control Register
  38 VDC_SOUR        = 15            ; (DMA) Source Register
  39 VDC_DESR        = 16            ; (DMA) Destination Register
  40 VDC_LENR        = 17            ; (DMA) Length Register
  41 VDC_SATB        = 18            ; Sprite Attribute Table
  42
  43 ; VDC port
  44 ; Note: absolute addressing mode must be used when writing to this port
  45
  46 VDC_CTRL        = $0000
  47 VDC_DATA_LO     = $0002
  48 VDC_DATA_HI     = $0003
  49
  50 ; huc6260 - Video Color Encoder (vce)
  51
  52 ; The DAC has a palette of 512 colours.
  53 ; bitmap of the palette data is this: 0000000gggrrrbbb.
  54 ; You can read and write the DAC-registers.
  55
  56 VCE             = $0400         ; base
  57
  58 VCE_CTRL        = $0400         ; write$00 to reset
  59 VCE_ADDR_LO     = $0402         ; LSB of byte offset into palette
  60 VCE_ADDR_HI     = $0403         ; MSB of byte offset into palette
  61 VCE_DATA_LO     = $0404         ; LSB of 16-bit palette data
  62 VCE_DATA_HI     = $0405         ; MSB of 16-bit palette data
  63
  64 ; programmable sound generator (PSG)
  65
  66 PSG             = $0800         ; base
  67
  68 PSG_CHAN_SELECT = $0800
  69 PSG_GLOBAL_PAN  = $0801
  70 PSG_FREQ_LO     = $0802
  71 PSG_FREQ_HI     = $0803
  72 PSG_CHAN_CTRL   = $0804
  73 PSG_CHAN_PAN    = $0805
  74 PSG_CHAN_DATA   = $0806
  75 PSG_NOISE       = $0807
  76 PSG_LFO_FREQ    = $0808
  77 PSG_LFO_CTRL    = $0809
  78
  79 ; timer
  80
  81 TIMER           = $0c00         ; base
  82
  83 TIMER_COUNT     = $0c00
  84 TIMER_CTRL      = $0c01
  85
  86 JOY_CTRL        = $1000
  87
  88 IRQ_MASK        = $1402
  89 IRQ_STATUS      = $1403
  90
  91 CDR_MEM_DISABLE = $1803
  92 CDR_MEM_ENABLE  = $1807
  93
  94 ; Write VDC register
  95 .macro VREG arg1,arg2
  96         st0     #arg1
  97         st1     #<(arg2)
  98         st2     #>(arg2)
  99 .endmacro