git.sur5r.net Git - cc65/blob - asminc/telemon24.inc

   1 ;
   2 ; Oric Telemon definition
   3 ; Telemon 2.4
   4 ;
   5
   6
   7 ; ---------------------------------------------------------------------------
   8 ; Constants
   9
  10 SCREEN_XSIZE    = 40            ; screen columns
  11 SCREEN_YSIZE    = 28            ; screen rows
  12
  13 FUNCTKEY        = $A5
  14
  15 FNAME_LEN       = 11            ; maximum length of file-name
  16
  17
  18 ; ---------------------------------------------------------------------------
  19 ; Zero page
  20
  21
  22
  23
  24 ; ---------------------------------------------------------------------------
  25 ; Low memory
  26
  27
  28
  29
  30 ; ---------------------------------------------------------------------------
  31 ; I/O locations
  32
  33 ; 6522
  34 .struct VIA                     ; Versatile Interface Adapter
  35         .res    $0300
  36 PRB     .byte                   ; Port Register B
  37 PRA     .byte                   ; Port Register A
  38 DDRB    .byte                   ; Data Direction Register B
  39 DDRA    .byte                   ; Data Direction Register A
  40 T1      .word                   ; Timer 1
  41 T1L     .word                   ; Timer 1 Latch
  42 T2      .word                   ; Timer 2
  43 SR      .byte                   ; Shift Register
  44 ACR     .byte                   ; Auxiliary Control Register
  45 PCR     .byte                   ; Peripheral Control Register
  46 IFR     .byte                   ; Interrupt Flags Register
  47 IER     .byte                   ; Interrupt Enable Register
  48 PRA2    .byte                   ; Port Register A without handshaking
  49 .endstruct
  50
  51 ; 6551
  52 .struct ACIA                    ; Asynchronous Communications Interface Adapter
  53         .res    $031C
  54 DATA    .byte
  55 STATUS  .byte
  56 CMD     .byte                   ; Command register
  57 CTRL    .byte                   ; Control register
  58 .endstruct
  59
  60 SCREEN          := $BB80
  61
  62
  63 ; ---------------------------------------------------------------------------
  64 ; ROM entries
  65
  66 XWR0   := $10
  67 XWSTR0 := $14
  68