git.sur5r.net Git - cc65/blob - asminc/cbm610.inc

   1 ;
   2 ; Zeropage and I/O definitions for the CBM 610
   3 ;
   4 ; Taken from a kernal disassembly done by myself in 1987.
   5 ;
   6 ; Ullrich von Bassewitz, 28.09.1998
   7
   8
   9 ; ---------------------------------------------------------------------------
  10 ; Zeropage stuff
  11
  12 ExecReg         = $00
  13 IndReg          = $01
  14 DEVNUM          = $9F
  15
  16 ; ---------------------------------------------------------------------------
  17 ; Screen size
  18
  19 XSIZE           = 80
  20 YSIZE           = 25
  21
  22 ; ---------------------------------------------------------------------------
  23 ; I/O definitions
  24
  25
  26 ; I/O  $d800: CRTC 6545
  27
  28 .struct CRTC
  29         ADDR    .byte
  30         DATA    .byte
  31 .endstruct
  32
  33 ; I/O  $db00: CIA 6526 Inter Process Communication
  34 ;
  35 ;       IPCcia          =       $db00
  36
  37 .struct CIA
  38         PRA     .byte
  39         PRB     .byte
  40         DDRA    .byte
  41         DDRB    .byte
  42         .union
  43             .struct
  44                 TALO    .byte
  45                 TAHI    .byte
  46             .endstruct
  47             TA          .word
  48         .endunion
  49         .union
  50             .struct
  51                 TBLO    .byte
  52                 TBHI    .byte
  53             .endstruct
  54             TB          .word
  55         .endunion
  56         TOD10   .byte
  57         TODSEC  .byte
  58         TODMIN  .byte
  59         TODHR   .byte
  60         SDR     .byte
  61         ICR     .byte
  62         CRA     .byte
  63         CRB     .byte
  64 .endstruct
  65
  66
  67 ; I/O  $dc00: CIA 6526
  68 ;
  69 ;       cia             =       $dc00
  70
  71
  72
  73 ; I/O  $dd00: ACIA 6551
  74 ;
  75 ;       acia            =       $dd00
  76
  77 .struct ACIA
  78         DATA    .byte
  79         STATUS  .byte
  80         CMD     .byte
  81         CTRL    .BYTE
  82 .endstruct
  83
  84
  85 ; I/O  $de00: Triport #1 6525
  86 ;
  87 ;       tpi1            =       $de00
  88
  89 .struct TPI
  90         PRA     .byte
  91         PRB     .byte
  92         .union
  93                 PRC     .byte
  94                 INT     .byte
  95         .endunion
  96         DDRA    .byte
  97         DDRB    .byte
  98         .union
  99                 DDRC    .byte
 100                 IMR     .byte
 101         .endunion
 102         CR      .byte
 103         AIR     .byte
 104 .endstruct
 105
 106
 107 ; I/O  $df00: Triport #2 6525
 108
 109 ;       tpi2            =       $df00
 110
 111