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 TIME            = $A0           ; 60HZ clock
  12 FNAM_LEN        = $B7           ; Length of filename
  13 SECADR          = $B9           ; Secondary address
  14 DEVNUM          = $BA           ; Device number
  15 KEY_COUNT       = $C6           ; Number of keys in input buffer
  16 CURS_FLAG       = $CC           ; 1 = cursor off
  17 CURS_BLINK      = $CD           ; Blink counter
  18 CURS_CHAR       = $CE           ; Character under the cursor
  19 CURS_COLOR      = $287          ; Color under the cursor
  20 CURS_STATE      = $CF           ; Cursor blink state
  21 SCREEN_PTR      = $D1           ; Pointer to current char in text screen
  22 CURS_X          = $D3           ; Cursor column
  23 CURS_Y          = $D6           ; Cursor row
  24 CRAM_PTR        = $F3           ; Pointer to current char in color RAM
  25
  26 CHARCOLOR       = $286
  27 PALFLAG         = $2A6          ; $01 = PAL, $00 = NTSC
  28
  29
  30 ; ---------------------------------------------------------------------------
  31 ; Kernal routines
  32
  33 ; Direct entries
  34 CLRSCR          = $E55F
  35 KBDREAD         = $E5CF
  36 NAMED_OPEN      = $F495
  37 NAMED_CLOSE     = $F6DA
  38 PLOTCHAR        = $EAAA         ; Char in A, color in X
  39
  40 ; ---------------------------------------------------------------------------
  41 ; Vector and other locations
  42
  43 IRQVec          = $0314
  44 BRKVec          = $0316
  45 NMIVec          = $0318
  46
  47 ; ---------------------------------------------------------------------------
  48 ; I/O: 6560 VIC
  49
  50 VIC             = $9000
  51 VIC_LINES       = $9003         ; Screen lines, bit 7 is bit 0 from VIC_HLINE
  52 VIC_HLINE       = $9004         ; Rasterline, bits 1-8
  53 VIC_COLOR       = $900F         ; Border and background color
  54
  55 ; ---------------------------------------------------------------------------
  56 ; I/O: 6522 VIA1
  57
  58 VIA1            = $9110
  59 VIA1_JOY        = $9111
  60 VIA1_DDRB       = $9112
  61 VIA1_DDRA       = $9113
  62
  63 ; ---------------------------------------------------------------------------
  64 ; I/O: 6522 VIA2
  65
  66 VIA2            = $9120
  67 VIA2_JOY        = $9120
  68 VIA2_DDRB       = $9122
  69 VIA2_DDRA       = $9123
  70