kernel/testkernels etc/vga.inc

   1 ;----------------------------------------------------------;
   2 ; BOS 0.04                  Christoffer Bubach, 2004-2005. ;
   3 ;----------------------------------------------------------;
   4 ;                                                          ;
   5 ;     VGA functions. Change video mode etc.                ;
   6 ;                                                          ;
   7 ;----------------------------------------------------------;
   8
   9
  10      ;-------------------;
  11      ;   VGA palettes    ;
  12      ;-------------------;
  13
  14           palette256      db   00, 00, 00, 00, 10, 41, 12, 28, 18, 02, 43, 22, 35
  15                           db   19, 09, 58, 00, 00, 57, 35, 12, 43, 43, 47, 24, 24
  16                           db   28, 20, 24, 60, 10, 60, 15, 31, 47, 63, 62, 56, 20
  17                           db   60, 56, 22, 63, 61, 36, 63, 63, 63, 00, 00, 00, 05
  18                           db   05, 05, 08, 08, 08, 11, 11, 11, 14, 14, 14, 17, 17
  19                           db   17, 20, 20, 20, 24, 24, 24, 28, 28, 28, 32, 32, 32
  20                           db   36, 36, 36, 40, 40, 40, 45, 45, 45, 50, 50, 50, 56
  21                           db   56, 56, 63, 63, 63, 13, 12, 15, 15, 16, 22, 17, 20
  22                           db   29, 19, 24, 36, 21, 28, 43, 23, 31, 50, 25, 34, 57
  23                           db   26, 42, 63, 00, 15, 02, 01, 22, 04, 02, 29, 06, 03
  24                           db   36, 08, 04, 43, 10, 05, 50, 12, 06, 57, 14, 20, 63
  25                           db   40, 18, 06, 07, 25, 12, 11, 33, 17, 14, 40, 23, 18
  26                           db   48, 28, 21, 55, 34, 25, 62, 39, 27, 63, 48, 36, 15
  27                           db   03, 02, 22, 06, 04, 29, 09, 06, 36, 12, 08, 43, 15
  28                           db   10, 50, 18, 12, 57, 21, 14, 63, 28, 20, 15, 00, 00
  29                           db   22, 07, 00, 29, 15, 00, 36, 23, 00, 43, 31, 00, 50
  30                           db   39, 00, 57, 47, 00, 63, 55, 00, 15, 05, 03, 22, 11
  31                           db   07, 29, 17, 11, 36, 23, 15, 43, 29, 19, 50, 35, 23
  32                           db   57, 41, 27, 63, 53, 34, 28, 14, 12, 33, 20, 14, 38
  33                           db   26, 16, 43, 32, 18, 48, 38, 20, 53, 44, 22, 58, 50
  34                           db   24, 63, 56, 30, 05, 05, 06, 10, 10, 13, 15, 15, 20
  35                           db   20, 20, 27, 25, 25, 34, 30, 30, 41, 35, 35, 48, 44
  36                           db   44, 63, 03, 06, 05, 05, 11, 09, 07, 16, 13, 09, 21
  37                           db   17, 11, 26, 21, 13, 31, 25, 15, 36, 29, 20, 48, 38
  38                           db   06, 06, 07, 13, 13, 15, 20, 20, 23, 27, 27, 31, 34
  39                           db   34, 39, 41, 41, 47, 48, 48, 55, 57, 57, 63, 06, 15
  40                           db   04, 12, 22, 08, 18, 29, 12, 24, 36, 16, 30, 43, 20
  41                           db   36, 50, 24, 42, 57, 28, 54, 63, 35, 15, 10, 10, 22
  42                           db   16, 16, 29, 21, 21, 36, 27, 27, 43, 32, 32, 50, 38
  43                           db   38, 57, 43, 43, 63, 54, 54, 15, 15, 06, 22, 22, 12
  44                           db   29, 29, 18, 36, 36, 24, 43, 43, 30, 50, 50, 36, 57
  45                           db   57, 42, 63, 63, 54, 02, 04, 14, 06, 12, 21, 10, 20
  46                           db   28, 14, 28, 35, 18, 36, 42, 22, 44, 49, 26, 52, 56
  47                           db   36, 63, 63, 18, 04, 14, 24, 08, 21, 31, 12, 28, 37
  48                           db   16, 35, 44, 20, 42, 50, 24, 49, 57, 28, 56, 63, 38
  49                           db   63, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00
  50                           db   00, 00, 00, 00, 00, 00, 00, 00, 00, 53, 44, 22, 09
  51                           db   08, 12, 16, 14, 16, 22, 21, 20, 29, 27, 24, 35, 34
  52                           db   28, 42, 40, 32, 48, 47, 36, 57, 56, 43, 08, 12, 16
  53                           db   14, 16, 22, 21, 20, 29, 27, 24, 35, 34, 28, 42, 40
  54                           db   32, 48, 47, 36, 57, 56, 43, 63, 13, 09, 11, 21, 16
  55                           db   15, 27, 22, 18, 36, 29, 22, 42, 35, 25, 51, 42, 29
  56                           db   57, 48, 32, 63, 56, 39, 06, 14, 09, 12, 21, 14, 18
  57                           db   27, 22, 24, 33, 28, 30, 39, 36, 36, 46, 42, 42, 52
  58                           db   47, 50, 59, 53, 00, 00, 00, 00, 00, 00, 00, 00, 00
  59                           db   00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00
  60                           db   00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00
  61                           db   00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00
  62                           db   00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00
  63                           db   00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00
  64                           db   00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00
  65                           db   00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00
  66                           db   00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00
  67                           db   00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00
  68                           db   00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00
  69                           db   00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00
  70                           db   00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00
  71                           db   00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00
  72                           db   00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00
  73                           db   00
  74
  75           palette16       db   00, 00, 00, 00, 00, 42, 00, 42, 00, 00, 42, 42, 42
  76                           db   00, 00, 42, 00, 42, 42, 21, 00, 42, 42, 42, 21, 21
  77                           db   21, 21, 21, 63, 21, 63, 21, 21, 63, 63, 63, 21, 21
  78                           db   63, 21, 63, 63, 63, 21, 63, 63, 63
  79
  80      ;---------------------;
  81      ;  VGA mode values.   ;
  82      ;---------------------;
  83           mode0x03        db   0x67, 0x00, 0x03, 0x00, 0x03, 0x00, 0x02, 0x5F, 0x4F
  84                           db   0x50, 0x82, 0x55, 0x81, 0xBF, 0x1F, 0x00, 0x4F, 0x0E
  85                           db   0x0F, 0x00, 0x00, 0x00, 0x00, 0x9C, 0x0E, 0x8F, 0x28
  86                           db   0x01, 0x96, 0xB9, 0xA3, 0xFF, 0x00, 0x00, 0x00, 0x00
  87                           db   0x00, 0x10, 0x0E, 0x00, 0xFF, 0x00, 0x01, 0x02, 0x03
  88                           db   0x04, 0x05, 0x14, 0x07, 0x38, 0x39, 0x3A, 0x3B, 0x3C
  89                           db   0x3D, 0x3E, 0x3F, 0x0C, 0x00, 0x0F, 0x08, 0x00
  90
  91           mode0x13        db   0x63, 0x00, 0x03, 0x01, 0x0F, 0x00, 0x0E, 0x5F, 0x4F
  92                           db   0x50, 0x82, 0x54, 0x80, 0xBF, 0x1F, 0x00, 0x41, 0x00
  93                           db   0x00, 0x00, 0x00, 0x00, 0x00, 0x9C, 0x0E, 0x8F, 0x28
  94                           db   0x40, 0x96, 0xB9, 0xA3, 0xFF, 0x00, 0x00, 0x00, 0x00
  95                           db   0x00, 0x40, 0x05, 0x0F, 0xFF, 0x00, 0x01, 0x02, 0x03
  96                           db   0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C
  97                           db   0x0D, 0x0E, 0x0F, 0x41, 0x00, 0x0F, 0x00, 0x00
  98
  99
 100           vga_buff        dd   0
 101
 102 ;---------------------------------;
 103 ;  sets the screen to mode 0x03   ;
 104 ;---------------------------------;
 105 set_mode_0x03:
 106           pushad
 107           push    ax
 108
 109           mov     esi, mode0x03
 110           call    set_regs
 111
 112           call    load_font                           ; IT WORKS!! FINALLY!
 113
 114           mov     esi, palette16
 115           call    set_palette16
 116
 117           pop     ax
 118           cmp     ax, 1
 119           jne     .cont
 120           call    cls                                 ; in text.inc
 121      .cont:
 122
 123           popad
 124           ret
 125
 126
 127
 128 ;---------------------------------;
 129 ;  sets the screen to mode 0x13   ;
 130 ;---------------------------------;
 131 set_mode_0x13:
 132           pushad
 133           push    ax
 134
 135           mov     esi, mode0x13
 136           call    set_regs
 137
 138           mov     esi, palette256
 139           call    set_palette256
 140
 141           pop     ax
 142           cmp     ax, 1
 143           jne     .cont
 144           mov     edi, 0xa0000                        ; write directly to mem
 145           mov     ax, 0x0000                          ; clear all 256kb with color 0
 146           mov     ecx, 0x20000                        ; 256kb, 0x20000 = (256*1024)/2
 147           rep     stosw                               ; by wordwrites
 148      .cont:
 149
 150           popad
 151           ret
 152
 153
 154
 155 ;----------------------------;
 156 ;  loads the standard font   ;
 157 ;----------------------------;
 158 load_font:
 159           cld
 160           mov     edi, vga_buff
 161
 162           mov     dx, 0x03ce                          ; graphics
 163           mov     al, 5                               ; write mode reg
 164           out     dx, al
 165           inc     dx
 166           in      al, dx
 167           stosb
 168           and     al, 0xfc
 169           xchg    al, ah
 170           mov     al, 5
 171           dec     dx
 172           out     dx, ax
 173
 174           mov     al, 6                               ; misc reg
 175           out     dx, al
 176           inc     dx
 177           in      al, dx
 178           stosb
 179           and     al, 0xf1
 180           or      al, 4
 181           xchg    al, ah
 182           mov     al, 6
 183           dec     dx
 184           out     dx, ax
 185
 186           mov     dx, 0x03c4                          ; sequencer port
 187           mov     al, 2                               ; map mask reg
 188           out     dx, al
 189           inc     dx
 190           in      al, dx
 191           stosb
 192
 193           dec     dx
 194           mov     ax, 0x0402
 195           out     dx, ax
 196
 197           mov     al, 4                               ; memory selector reg
 198           out     dx, al
 199           inc     dx
 200           in      al, dx
 201           stosb
 202           or      al, 4
 203           xchg    al, ah
 204           mov     al, 4
 205           dec     dx
 206           out     dx, ax
 207
 208           mov     esi, font_8x16                      ; font pointer
 209           mov     edi, 0xa0000
 210
 211           xor     ecx, ecx
 212           mov     ebx, ecx
 213
 214      .l1:
 215           mov     cl, 16                              ; font bytes (16 is standard)
 216           rep     movsb
 217
 218           mov     cl, 32
 219           sub     cl, 16                              ; font bytes
 220           xor     eax, eax
 221           rep     stosb
 222
 223           dec     bl                                  ; 256 chars
 224           jnz     .l1
 225
 226           mov     esi, vga_buff
 227
 228           mov     dx, 0x03ce
 229           lodsb
 230           xchg    al, ah
 231           mov     al, 5
 232           out     dx, ax
 233
 234           lodsb
 235           xchg    al, ah
 236           mov     al, 6
 237           out     dx, ax
 238
 239           mov     dx, 0x03c4
 240           lodsb
 241           xchg    al, ah
 242           mov     al, 2
 243           out     dx, ax
 244
 245           lodsb
 246           xchg    al, ah
 247           mov     al, 4
 248           out     dx, ax
 249
 250           ret
 251
 252
 253
 254 ;------------------------------------;
 255 ;  put a pixel at x, y with color    ;
 256 ;           used only in mode 0x13   ;
 257 ;                                    ;
 258 ; input:   bx = x                    ;
 259 ;          cx = y                    ;
 260 ;          al = color                ;
 261 ;                                    ;
 262 ; output:  none.                     ;
 263 ;------------------------------------;
 264 put_0x13_pixel:
 265           push    ax
 266           push    bx
 267           push    cx
 268           push    edi
 269
 270           mov     edi, 0xa0000                        ; directly to mem
 271           add     di, bx
 272           mov     bx, cx
 273           shl     cx, 8
 274           shl     bx, 6
 275           add     cx, bx
 276           add     di, cx
 277           stosb
 278
 279           pop     edi
 280           pop     cx
 281           pop     bx
 282           pop     ax
 283           ret
 284
 285
 286 ;-----------------------------------------------------;
 287 ;  put a sprite at x, y.  only for mode 0x13          ;
 288 ;                                                     ;
 289 ; input:   ax  = x, bx = y, cx = width, dx = height   ;
 290 ;          esi = pointer to sprite                    ;
 291 ;                                                     ;
 292 ; output:  none.                                      ;
 293 ;-----------------------------------------------------;
 294 put_0x13_sprite:
 295           pushad                                      ; this was a
 296      .row_loop:                                       ; nightmare to write.
 297           dec     dx                                  ; guess how many times
 298           push    cx                                  ; i got lost in the push
 299           push    ax                                  ; and pops here.. ;)
 300      .col_loop:                                       ; not to mention what
 301           dec     cx                                  ; time it was when i wrote
 302           push    ax                                  ; it.. :P
 303           push    bx
 304           push    cx
 305           mov     cx, bx
 306           mov     bx, ax
 307           lodsb
 308           call    put_0x13_pixel
 309           pop     cx
 310           pop     bx
 311           pop     ax
 312           inc     ax
 313           cmp     cx, 0
 314           jne     .col_loop
 315           pop     ax
 316           pop     cx
 317           inc     bx
 318           cmp     dx, 0
 319           jne     .row_loop
 320           popad
 321           ret
 322
 323
 324 ;---------------------------------------------;
 325 ;  sets the palette (256 colors)              ;
 326 ;                                             ;
 327 ; input:  esi = palette.                      ;
 328 ; output: none.                               ;
 329 ;---------------------------------------------;
 330 set_palette256:
 331           push    ax
 332           push    cx
 333           push    dx
 334
 335           xor     cx, cx
 336      .l1:
 337           mov     dx, 0x03C8
 338           mov     al, cl                              ; color no. = loop no.
 339           out     dx, al
 340           inc     dx                                  ; port 0x3C9
 341           mov     al, byte [esi]                      ; red
 342           out     dx, al
 343           inc     esi
 344           mov     al, byte [esi]                      ; green
 345           out     dx, al
 346           inc     esi
 347           mov     al, byte [esi]                      ; blue
 348           out     dx, al
 349           inc     esi
 350
 351           inc     cx
 352           cmp     cx, 256
 353           jl      .l1
 354
 355           pop     dx
 356           pop     cx
 357           pop     ax
 358           ret
 359
 360
 361 ;---------------------------------------------;
 362 ;  sets the palette (16 colors)               ;
 363 ;                                             ;
 364 ; input:  esi = pointer to palette.           ;
 365 ; output: none.                               ;
 366 ;---------------------------------------------;
 367 set_palette16:
 368           push    ax
 369           push    cx
 370           push    dx
 371
 372           xor     cx, cx
 373      .l1:
 374           mov     dx, 0x3DA
 375           in      al, dx
 376           mov     al, cl                              ; color no.
 377           mov     dx, 0x3C0
 378           out     dx, al
 379           inc     dx                                  ; port 0x3C1
 380           in      al, dx
 381           mov     dx, 0x3C8
 382           out     dx, al
 383
 384           inc     dx                                  ; port 0x3C9
 385           mov     al, byte [esi]                      ; red
 386           out     dx, al
 387           inc     esi
 388           mov     al, byte [esi]                      ; green
 389           out     dx, al
 390           inc     esi
 391           mov     al, byte [esi]                      ; blue
 392           out     dx, al
 393           inc     esi
 394
 395           inc     cx
 396           cmp     cx, 16
 397           jl      .l1
 398
 399           mov     dx, 0x3DA
 400           in      al, dx
 401           mov     al, 0x20
 402           mov     dx, 0x3C0
 403           out     dx, al
 404
 405           pop     dx
 406           pop     cx
 407           pop     ax
 408           ret
 409
 410
 411
 412 ;---------------------------------;
 413 ;  Set VGA regs to choosen mode   ;
 414 ;           internal use.         ;
 415 ;---------------------------------;
 416 set_regs:
 417           cli
 418           mov     dx, 0x3C2
 419           lodsb
 420           out     dx, al
 421
 422           mov     dx, 0x3DA
 423           lodsb
 424           out     dx, al
 425
 426           xor     ecx, ecx
 427           mov     dx, 0x3C4
 428      .l1:
 429           lodsb
 430           xchg    al, ah
 431           mov     al, cl
 432           out     dx, ax
 433           inc     ecx
 434           cmp     cl, 4
 435           jbe     .l1
 436
 437           mov     dx, 0x3D4
 438           mov     ax, 0x0E11
 439           out     dx, ax
 440
 441           xor     ecx, ecx
 442           mov     dx, 0x3D4
 443      .l2:
 444           lodsb
 445           xchg    al, ah
 446           mov     al, cl
 447           out     dx, ax
 448           inc     ecx
 449           cmp     cl, 0x18
 450           jbe     .l2
 451
 452           xor     ecx, ecx
 453           mov     dx, 0x3CE
 454      .l3:
 455           lodsb
 456           xchg    al, ah
 457           mov     al, cl
 458           out     dx, ax
 459           inc     ecx
 460           cmp     cl, 8
 461           jbe     .l3
 462
 463           mov     dx, 0x3DA
 464           in      al, dx
 465
 466           xor     ecx, ecx
 467           mov     dx, 0x3C0
 468      .l4:
 469           in      ax, dx
 470           mov     al, cl
 471           out     dx, al
 472           lodsb
 473           out     dx, al
 474           inc     ecx
 475           cmp     cl, 0x14
 476           jbe     .l4
 477
 478           mov     al, 0x20
 479           out     dx, al
 480
 481           sti
 482           ret