git.sur5r.net Git - cc65/blob - libsrc/vic20/vic20.inc

   1 ;
   2 ; Vic20 generic definitions. Stolen mostly from c64.inc - Steve Schmidtke
   3 ;
   4
   5
   6 ; ---------------------------------------------------------------------------
   7 ; Zero page, Commodore stuff
   8
   9 ST              = $90           ; IEC status byte
  10
  11 FNAM_LEN        = $B7           ; Length of filename
  12 SECADR          = $B9           ; Secondary address
  13 DEVNUM          = $BA           ; Device number
  14 KEY_COUNT       = $C6           ; Number of keys in input buffer
  15 CURS_FLAG       = $CC           ; 1 = cursor off
  16 CURS_BLINK      = $CD           ; Blink counter
  17 CURS_CHAR       = $CE           ; Character under the cursor
  18 CURS_COLOR      = $287          ; Color under the cursor
  19 CURS_STATE      = $CF           ; Cursor blink state
  20 SCREEN_PTR      = $D1           ; Pointer to current char in text screen
  21 CURS_X          = $D3           ; Cursor column
  22 CURS_Y          = $D6           ; Cursor row
  23 CRAM_PTR        = $F3           ; Pointer to current char in color RAM
  24
  25 CHARCOLOR       = $286
  26 PALFLAG         = $2A6          ; $01 = PAL, $00 = NTSC
  27
  28
  29 ; ---------------------------------------------------------------------------
  30 ; Kernal routines
  31
  32 ; Direct entries
  33 CLRSCR          = $E55F
  34 KBDREAD         = $E5CF
  35 NAMED_OPEN      = $F495
  36 NAMED_CLOSE     = $F6DA
  37 PLOTCHAR        = $EAAA         ; Char in A, color in X
  38
  39 ; ---------------------------------------------------------------------------
  40 ; Vector and other locations
  41
  42 IRQVec          = $0314
  43 BRKVec          = $0316
  44 NMIVec          = $0318
  45
  46 ; ---------------------------------------------------------------------------
  47 ; I/O: 6560 VIC
  48
  49 VIC             = $9000
  50 VIC_COLOR       = $900F
  51
  52 ; ---------------------------------------------------------------------------
  53 ; I/O: 6522 VIA1
  54
  55 VIA1            = $9110
  56 VIA1_JOY        = $9111
  57 VIA1_DDRB       = $9112
  58 VIA1_DDRA       = $9113
  59
  60 ; ---------------------------------------------------------------------------
  61 ; I/O: 6522 VIA2
  62
  63 VIA2            = $9120
  64 VIA2_JOY        = $9120
  65 VIA2_DDRB       = $9122
  66 VIA2_DDRA       = $9123
  67