git.sur5r.net Git - cc65/blob - asminc/cbm510.inc

   1 ;
   2 ; Zero page variables and I/O definitions for the CBM 510
   3 ;
   4 ; Taken from a kernal disassembly done by myself in 2000/2001.
   5 ;
   6 ; 2001-09-13, Ullrich von Bassewitz
   7 ; 2013-08-26, Greg King
   8
   9
  10 ;-----------------------------------------------------------------------------
  11 ; Zeropage stuff
  12
  13 ExecReg         := $00          ; Controls execution memory bank
  14 IndReg          := $01          ; Controls indirect indexed load-store bank
  15
  16 TXTPTR          := $85          ; Far pointer into BASIC source code
  17
  18 ; ---------------------------------------------------------------------------
  19 ; Screen size
  20
  21 XSIZE           = 40
  22 YSIZE           = 25
  23
  24 ;-----------------------------------------------------------------------------
  25 ; I/O Definitions
  26 ; Note:  These numbers aren't addresses.  They are offsets from the start of
  27 ; each chip's register set.  They are used in the indirect indexed addressing
  28 ; mode.
  29
  30 ; I/O  $d800: VIC-II
  31
  32 VIC_SPR0_X      = $00
  33 VIC_SPR0_Y      = $01
  34 VIC_SPR1_X      = $02
  35 VIC_SPR1_Y      = $03
  36 VIC_SPR2_X      = $04
  37 VIC_SPR2_Y      = $05
  38 VIC_SPR3_X      = $06
  39 VIC_SPR3_Y      = $07
  40 VIC_SPR4_X      = $08
  41 VIC_SPR4_Y      = $09
  42 VIC_SPR5_X      = $0A
  43 VIC_SPR5_Y      = $0B
  44 VIC_SPR6_X      = $0C
  45 VIC_SPR6_Y      = $0D
  46 VIC_SPR7_X      = $0E
  47 VIC_SPR7_Y      = $0F
  48 VIC_SPR_HI_X    = $10
  49 VIC_SPR_ENA     = $15
  50 VIC_SPR_EXP_Y   = $17
  51 VIC_SPR_EXP_X   = $1D
  52 VIC_SPR_MCOLOR  = $1C
  53 VIC_SPR_BG_PRIO = $1B
  54
  55 VIC_SPR_MCOLOR0 = $25
  56 VIC_SPR_MCOLOR1 = $26
  57
  58 VIC_SPR0_COLOR  = $27
  59 VIC_SPR1_COLOR  = $28
  60 VIC_SPR2_COLOR  = $29
  61 VIC_SPR3_COLOR  = $2A
  62 VIC_SPR4_COLOR  = $2B
  63 VIC_SPR5_COLOR  = $2C
  64 VIC_SPR6_COLOR  = $2D
  65 VIC_SPR7_COLOR  = $2E
  66
  67 VIC_CTRL1       = $11
  68 VIC_CTRL2       = $16
  69
  70 VIC_HLINE       = $12
  71
  72 VIC_LPEN_X      = $13
  73 VIC_LPEN_Y      = $14
  74
  75 VIC_VIDEO_ADR   = $18
  76
  77 VIC_IRR         = $19           ; Interrupt request register
  78 VIC_IMR         = $1A           ; Interrupt mask register
  79
  80 VIC_BORDERCOLOR = $20
  81 VIC_BG_COLOR0   = $21
  82 VIC_BG_COLOR1   = $22
  83 VIC_BG_COLOR2   = $23
  84 VIC_BG_COLOR3   = $24
  85
  86
  87 ; I/O  $da00: SID 6581
  88
  89 SID_S1Lo        = $00
  90 SID_S1Hi        = $01
  91 SID_PB1Lo       = $02
  92 SID_PB1Hi       = $03
  93 SID_Ctl1        = $04
  94 SID_AD1         = $05
  95 SID_SUR1        = $06
  96
  97 SID_S2Lo        = $07
  98 SID_S2Hi        = $08
  99 SID_PB2Lo       = $09
 100 SID_PB2Hi       = $0A
 101 SID_Ctl2        = $0B
 102 SID_AD2         = $0C
 103 SID_SUR2        = $0D
 104
 105 SID_S3Lo        = $0E
 106 SID_S3Hi        = $0F
 107 SID_PB3Lo       = $10
 108 SID_PB3Hi       = $11
 109 SID_Ctl3        = $12
 110 SID_AD3         = $13
 111 SID_SUR3        = $14
 112
 113 SID_FltLo       = $15
 114 SID_FltHi       = $16
 115 SID_FltCtl      = $17
 116 SID_Amp         = $18
 117 SID_ADConv1     = $19
 118 SID_ADConv2     = $1A
 119 SID_Noise       = $1B
 120 SID_Read3       = $1C
 121
 122
 123 ; I/O  $db00: CIA 6526, Inter Process Communication
 124 ; I/O  $dc00: CIA 6526
 125
 126 .struct CIA
 127         PRA     .byte
 128         PRB     .byte
 129         DDRA    .byte
 130         DDRB    .byte
 131         .union
 132             .struct
 133                 TALO    .byte
 134                 TAHI    .byte
 135             .endstruct
 136             TA          .word
 137         .endunion
 138         .union
 139             .struct
 140                 TBLO    .byte
 141                 TBHI    .byte
 142             .endstruct
 143             TB          .word
 144         .endunion
 145         TOD10   .byte
 146         TODSEC  .byte
 147         TODMIN  .byte
 148         TODHR   .byte
 149         SDR     .byte
 150         ICR     .byte
 151         CRA     .byte
 152         CRB     .byte
 153 .endstruct
 154
 155
 156 ; I/O  $dd00: ACIA 6551
 157
 158 .struct ACIA
 159         DATA    .byte
 160         STATUS  .byte
 161         CMD     .byte
 162         CTRL    .BYTE
 163 .endstruct
 164
 165
 166 ; I/O  $de00: Triport #1 6525
 167 ; I/O  $df00: Triport #2 6525
 168
 169 .struct TPI
 170         PRA     .byte
 171         PRB     .byte
 172         .union
 173                 PRC     .byte
 174                 INT     .byte
 175         .endunion
 176         DDRA    .byte
 177         DDRB    .byte
 178         .union
 179                 DDRC    .byte
 180                 IMR     .byte
 181         .endunion
 182         CR      .byte
 183         AIR     .byte
 184 .endstruct
 185
 186
 187 ;-----------------------------------------------------------------------------
 188 ; Our video memory address
 189
 190 COLOR_RAM       := $D400        ; System bank
 191
 192
 193 ;-----------------------------------------------------------------------------
 194
 195 BASIC_BUF       := $FB5E        ; Bank 0 location of command-line
 196 BASIC_BUF_LEN   = 162           ; Maximum length of command-line