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