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

   1 ;
   2 ; C64 generic definitions. Stolen from Elite128
   3 ;
   4
   5
   6 ; ---------------------------------------------------------------------------
   7 ; Zero page, Commodore stuff
   8
   9 MEMSIZE         = $34           ; Size of memory installed
  10 TIME            = $8D           ; 60HZ clock
  11 ST              = $96           ; IEC status byte
  12 KEY_COUNT       = $9E           ; Number of keys in input buffer
  13 RVS             = $9F           ; Reverse flag
  14 CURS_FLAG       = $A7           ; 1 = cursor off
  15 CURS_BLINK      = $A8           ; Blink counter
  16 CURS_CHAR       = $A9           ; Character under the cursor
  17 CURS_STATE      = $AA           ; Cursor blink state
  18 SCREEN_PTR      = $C4           ; Pointer to current char in text screen
  19 CURS_X          = $C6           ; Cursor column
  20 FNLEN           = $D1           ; Length of filename
  21 LFN             = $D2           ; Current Logical File Number
  22 SECADR          = $D3           ; Secondary address
  23 DEVNUM          = $D4           ; Device number
  24 SCR_LINELEN     = $D5           ; Screen line length
  25 CURS_Y          = $D8           ; Cursor row
  26 FNADR           = $DA           ; Pointer to file name
  27
  28 KEY_BUF         = $26F          ; Keyboard buffer
  29
  30 ;----------------------------------------------------------------------------
  31 ; PET ROM type detection
  32
  33 PET_DETECT      = $FFFB
  34 PET_2000        = $CA
  35 PET_3000        = $FC
  36 PET_4000        = $FD
  37
  38
  39 ;----------------------------------------------------------------------------
  40 ; Vector and other locations
  41
  42 IRQVec          = $0090
  43 BRKVec          = $0092
  44 NMIVec          = $0094
  45