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 ; 2014-04-02, 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 FNAM            := $90          ; Far pointer to LOAD/SAVE file-name
  18 FNAM_LEN        := $9D          ; Holds length of file-name
  19
  20 ; ---------------------------------------------------------------------------
  21 ; Screen size
  22
  23 XSIZE           = 40
  24 YSIZE           = 25
  25
  26 ;-----------------------------------------------------------------------------
  27 ; I/O Definitions
  28 ; Note:  These numbers aren't addresses.  They are offsets from the start of
  29 ; each chip's register set.  They are used in the indirect indexed addressing
  30 ; mode.
  31
  32 ; I/O  $d800: VIC-II
  33
  34 VIC_SPR0_X      = $00
  35 VIC_SPR0_Y      = $01
  36 VIC_SPR1_X      = $02
  37 VIC_SPR1_Y      = $03
  38 VIC_SPR2_X      = $04
  39 VIC_SPR2_Y      = $05
  40 VIC_SPR3_X      = $06
  41 VIC_SPR3_Y      = $07
  42 VIC_SPR4_X      = $08
  43 VIC_SPR4_Y      = $09
  44 VIC_SPR5_X      = $0A
  45 VIC_SPR5_Y      = $0B
  46 VIC_SPR6_X      = $0C
  47 VIC_SPR6_Y      = $0D
  48 VIC_SPR7_X      = $0E
  49 VIC_SPR7_Y      = $0F
  50 VIC_SPR_HI_X    = $10
  51 VIC_SPR_ENA     = $15
  52 VIC_SPR_EXP_Y   = $17
  53 VIC_SPR_EXP_X   = $1D
  54 VIC_SPR_MCOLOR  = $1C
  55 VIC_SPR_BG_PRIO = $1B
  56
  57 VIC_SPR_MCOLOR0 = $25
  58 VIC_SPR_MCOLOR1 = $26
  59
  60 VIC_SPR0_COLOR  = $27
  61 VIC_SPR1_COLOR  = $28
  62 VIC_SPR2_COLOR  = $29
  63 VIC_SPR3_COLOR  = $2A
  64 VIC_SPR4_COLOR  = $2B
  65 VIC_SPR5_COLOR  = $2C
  66 VIC_SPR6_COLOR  = $2D
  67 VIC_SPR7_COLOR  = $2E
  68
  69 VIC_CTRL1       = $11
  70 VIC_CTRL2       = $16
  71
  72 VIC_HLINE       = $12
  73
  74 VIC_LPEN_X      = $13
  75 VIC_LPEN_Y      = $14
  76
  77 VIC_VIDEO_ADR   = $18
  78
  79 VIC_IRR         = $19           ; Interrupt request register
  80 VIC_IMR         = $1A           ; Interrupt mask register
  81
  82 VIC_BORDERCOLOR = $20
  83 VIC_BG_COLOR0   = $21
  84 VIC_BG_COLOR1   = $22
  85 VIC_BG_COLOR2   = $23
  86 VIC_BG_COLOR3   = $24
  87
  88
  89 ; I/O  $da00: SID 6581
  90
  91 SID_S1Lo        = $00
  92 SID_S1Hi        = $01
  93 SID_PB1Lo       = $02
  94 SID_PB1Hi       = $03
  95 SID_Ctl1        = $04
  96 SID_AD1         = $05
  97 SID_SUR1        = $06
  98
  99 SID_S2Lo        = $07
 100 SID_S2Hi        = $08
 101 SID_PB2Lo       = $09
 102 SID_PB2Hi       = $0A
 103 SID_Ctl2        = $0B
 104 SID_AD2         = $0C
 105 SID_SUR2        = $0D
 106
 107 SID_S3Lo        = $0E
 108 SID_S3Hi        = $0F
 109 SID_PB3Lo       = $10
 110 SID_PB3Hi       = $11
 111 SID_Ctl3        = $12
 112 SID_AD3         = $13
 113 SID_SUR3        = $14
 114
 115 SID_FltLo       = $15
 116 SID_FltHi       = $16
 117 SID_FltCtl      = $17
 118 SID_Amp         = $18
 119 SID_ADConv1     = $19
 120 SID_ADConv2     = $1A
 121 SID_Noise       = $1B
 122 SID_Read3       = $1C
 123
 124
 125 ; I/O  $db00: CIA 6526, Inter Process Communication
 126 ; I/O  $dc00: CIA 6526
 127
 128 .struct CIA
 129         PRA     .byte
 130         PRB     .byte
 131         DDRA    .byte
 132         DDRB    .byte
 133         .union
 134             .struct
 135                 TALO    .byte
 136                 TAHI    .byte
 137             .endstruct
 138             TA          .word
 139         .endunion
 140         .union
 141             .struct
 142                 TBLO    .byte
 143                 TBHI    .byte
 144             .endstruct
 145             TB          .word
 146         .endunion
 147         TOD10   .byte
 148         TODSEC  .byte
 149         TODMIN  .byte
 150         TODHR   .byte
 151         SDR     .byte
 152         ICR     .byte
 153         CRA     .byte
 154         CRB     .byte
 155 .endstruct
 156
 157
 158 ; I/O  $dd00: ACIA 6551
 159
 160 .struct ACIA
 161         DATA    .byte
 162         STATUS  .byte
 163         CMD     .byte
 164         CTRL    .BYTE
 165 .endstruct
 166
 167
 168 ; I/O  $de00: Triport #1 6525
 169 ; I/O  $df00: Triport #2 6525
 170
 171 .struct TPI
 172         PRA     .byte
 173         PRB     .byte
 174         .union
 175                 PRC     .byte
 176                 INT     .byte
 177         .endunion
 178         DDRA    .byte
 179         DDRB    .byte
 180         .union
 181                 DDRC    .byte
 182                 IMR     .byte
 183         .endunion
 184         CR      .byte
 185         AIR     .byte
 186 .endstruct
 187
 188
 189 ;-----------------------------------------------------------------------------
 190 ; Our video memory address
 191
 192 COLOR_RAM       := $D400        ; System bank
 193
 194
 195 ;-----------------------------------------------------------------------------
 196
 197 BASIC_BUF       := $FB5E        ; Bank 0 location of command-line
 198 BASIC_BUF_LEN   = 162           ; Maximum length of command-line