Kernel/drv/vterm.c

   1 /*
   2  * Acess2 Virtual Terminal Driver
   3  */
   4 #include <common.h>
   5 #include <fs_devfs.h>
   6 #include <modules.h>
   7 #include <tpl_drv_video.h>
   8 #include <tpl_drv_keyboard.h>
   9
  10 // === CONSTANTS ===
  11 #define NUM_VTS 4
  12 #define MAX_INPUT_CHARS 64
  13 #define VT_SCROLLBACK   1       // 4 Screens of text
  14 #define DEFAULT_OUTPUT  "/Devices/VGA"
  15 #define DEFAULT_INPUT   "/Devices/PS2Keyboard"
  16 #define DEFAULT_WIDTH   80
  17 #define DEFAULT_HEIGHT  25
  18 #define DEFAULT_COLOUR  (VT_COL_BLACK|(VT_COL_WHITE<<16))
  19
  20 #define VT_FLAG_HIDECSR 0x01
  21
  22 enum eVT_Modes {
  23         VT_MODE_TEXT8,  // UTF-8 Text Mode (VT100 Emulation)
  24         VT_MODE_TEXT32, // UTF-32 Text Mode (Acess Native)
  25         VT_MODE_8BPP,   // 256 Colour Mode
  26         VT_MODE_16BPP,  // 16 bit Colour Mode
  27         VT_MODE_24BPP,  // 24 bit Colour Mode
  28         VT_MODE_32BPP,  // 32 bit Colour Mode
  29         NUM_VT_MODES
  30 };
  31
  32 // === TYPES ===
  33 typedef struct {
  34          int    Mode;
  35          int    Flags;
  36          int    Width, Height;
  37          int    ViewPos, WritePos;
  38         Uint32  CurColour;
  39         char    Name[2];
  40          int    InputRead;
  41          int    InputWrite;
  42         Uint32  InputBuffer[MAX_INPUT_CHARS];
  43         union {
  44                 tVT_Char        *Text;
  45                 Uint32          *Buffer;
  46         };
  47         tVFS_Node       Node;
  48 } tVTerm;
  49
  50 // === PROTOTYPES ===
  51  int    VT_Install(char **Arguments);
  52 char    *VT_ReadDir(tVFS_Node *Node, int Pos);
  53 tVFS_Node       *VT_FindDir(tVFS_Node *Node, char *Name);
  54 Uint64  VT_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer);
  55 Uint64  VT_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer);
  56  int    VT_IOCtl(tVFS_Node *Node, int Id, void *Data);
  57 void    VT_KBCallBack(Uint32 Codepoint);
  58 void    VT_int_PutString(tVTerm *Term, Uint8 *Buffer, Uint Count);
  59  int    VT_int_ParseEscape(tVTerm *Term, char *Buffer);
  60 void    VT_int_PutChar(tVTerm *Term, Uint32 Ch);
  61 void    VT_int_UpdateScreen( tVTerm *Term, int UpdateAll );
  62
  63 // === CONSTANTS ===
  64 const Uint16    caVT100Colours[] = {
  65                 VT_COL_BLACK, 0x700, 0x070, 0x770, 0x007, 0x707, 0x077, VT_COL_LTGREY,
  66                 VT_COL_GREY, 0xF00, 0x0F0, 0xFF0, 0x00F, 0xF0F, 0x0FF, VT_COL_WHITE
  67         };
  68
  69 // === GLOBALS ===
  70 MODULE_DEFINE(0, 0x0032, VTerm, VT_Install, NULL, NULL);
  71 tDevFS_Driver   gVT_DrvInfo = {
  72         NULL, "VTerm",
  73         {
  74         .Flags = VFS_FFLAG_DIRECTORY,
  75         .Inode = -1,
  76         .NumACLs = 0,
  77         .ReadDir = VT_ReadDir,
  78         .FindDir = VT_FindDir
  79         }
  80 };
  81 tVTerm  gVT_Terminals[NUM_VTS];
  82 char    *gsVT_OutputDevice = NULL;
  83 char    *gsVT_InputDevice = NULL;
  84  int    giVT_OutputDevHandle = -2;
  85  int    giVT_InputDevHandle = -2;
  86  int    giVT_CurrentTerminal = 0;
  87
  88 // === CODE ===
  89 /**
  90  * \fn int VT_Install(char **Arguments)
  91  * \brief Installs the Virtual Terminal Driver
  92  */
  93 int VT_Install(char **Arguments)
  94 {
  95         char    **args = Arguments;
  96         char    *arg;
  97          int    i;
  98
  99         // Scan Arguments
 100         if(Arguments)
 101         {
 102                 for( ; (arg = *args); args++ )
 103                 {
 104                         if(arg[0] != '-')       continue;
 105
 106                         switch(arg[1])
 107                         {
 108                         // Set output device
 109                         case 'o':
 110                                 if(args[1] ==  NULL)    break;
 111                                 if(gsVT_OutputDevice)   free(gsVT_OutputDevice);
 112                                 gsVT_OutputDevice = malloc(strlen(args[1])+1);
 113                                 strcpy(gsVT_OutputDevice, args[1]);
 114                                 args ++;
 115                                 break;
 116
 117                         // Set input device
 118                         case 'i':
 119                                 if(args[1] == NULL)     break;
 120                                 if(gsVT_InputDevice)    free(gsVT_InputDevice);
 121                                 gsVT_InputDevice = malloc(strlen(args[1])+1);
 122                                 strcpy(gsVT_InputDevice, args[1]);
 123                                 args ++;
 124                                 break;
 125
 126                         }
 127                 }
 128         }
 129
 130         // Apply Defaults
 131         if(!gsVT_OutputDevice)  gsVT_OutputDevice = DEFAULT_OUTPUT;
 132         if(!gsVT_InputDevice)   gsVT_InputDevice = DEFAULT_INPUT;
 133
 134         LOG("Using '%s' as output", gsVT_OutputDevice);
 135         LOG("Using '%s' as input", gsVT_InputDevice);
 136
 137         // Create Nodes
 138         for( i = 0; i < NUM_VTS; i++ )
 139         {
 140                 gVT_Terminals[i].Mode = VT_MODE_TEXT8;
 141                 gVT_Terminals[i].Flags = 0;
 142                 gVT_Terminals[i].Width = DEFAULT_WIDTH;
 143                 gVT_Terminals[i].Height = DEFAULT_HEIGHT;
 144                 gVT_Terminals[i].CurColour = DEFAULT_COLOUR;
 145                 gVT_Terminals[i].WritePos = 0;
 146                 gVT_Terminals[i].ViewPos = 0;
 147
 148                 gVT_Terminals[i].Buffer = malloc( DEFAULT_WIDTH*DEFAULT_HEIGHT*VT_SCROLLBACK*sizeof(tVT_Char) );
 149                 memset( gVT_Terminals[i].Buffer, 0, DEFAULT_WIDTH*DEFAULT_HEIGHT*VT_SCROLLBACK*sizeof(tVT_Char) );
 150
 151                 gVT_Terminals[i].Name[0] = '0'+i;
 152                 gVT_Terminals[i].Name[1] = '\0';
 153                 gVT_Terminals[i].Node.Inode = i;
 154                 gVT_Terminals[i].Node.NumACLs = 0;      // Only root can open virtual terminals
 155
 156                 gVT_Terminals[i].Node.Read = VT_Read;
 157                 gVT_Terminals[i].Node.Write = VT_Write;
 158                 gVT_Terminals[i].Node.IOCtl = VT_IOCtl;
 159         }
 160
 161         // Add to DevFS
 162         DevFS_AddDevice( &gVT_DrvInfo );
 163
 164         return 0;
 165 }
 166
 167 /**
 168  * \fn void VT_InitOutput()
 169  * \brief Initialise Video Output
 170  */
 171 void VT_InitOutput()
 172 {
 173         giVT_OutputDevHandle = VFS_Open(gsVT_OutputDevice, VFS_OPENFLAG_WRITE);
 174         LOG("giVT_OutputDevHandle = %x\n", giVT_OutputDevHandle);
 175 }
 176
 177 /**
 178  * \fn void VT_InitInput()
 179  * \brief Initialises the input
 180  */
 181 void VT_InitInput()
 182 {
 183         giVT_InputDevHandle = VFS_Open(gsVT_InputDevice, VFS_OPENFLAG_READ);
 184         LOG("giVT_InputDevHandle = %x\n", giVT_InputDevHandle);
 185         if(giVT_InputDevHandle == -1)   return ;
 186         VFS_IOCtl(giVT_InputDevHandle, KB_IOCTL_SETCALLBACK, VT_KBCallBack);
 187 }
 188
 189 /**
 190  * \fn char *VT_ReadDir(tVFS_Node *Node, int Pos)
 191  * \brief Read from the VTerm Directory
 192  */
 193 char *VT_ReadDir(tVFS_Node *Node, int Pos)
 194 {
 195         if(Pos < 0)     return NULL;
 196         if(Pos >= NUM_VTS)      return NULL;
 197         return gVT_Terminals[Pos].Name;
 198 }
 199
 200 /**
 201  * \fn tVFS_Node *VT_FindDir(tVFS_Node *Node, char *Name)
 202  * \brief Find an item in the VTerm directory
 203  */
 204 tVFS_Node *VT_FindDir(tVFS_Node *Node, char *Name)
 205 {
 206          int    num;
 207
 208         //ENTER("pNode sName", Node, Name);
 209
 210         // Open the input and output files if needed
 211         if(giVT_OutputDevHandle == -2)  VT_InitOutput();
 212         if(giVT_InputDevHandle == -2)   VT_InitInput();
 213
 214         // Sanity check name
 215         if(Name[0] < '0' || Name[0] > '9' || Name[1] != '\0') {
 216                 LEAVE('n');
 217                 return NULL;
 218         }
 219         // Get index
 220         num = Name[0] - '0';
 221         if(num >= NUM_VTS) {
 222                 LEAVE('n');
 223                 return NULL;
 224         }
 225         // Return node
 226         //LEAVE('p', &gVT_Terminals[num].Node);
 227         return &gVT_Terminals[num].Node;
 228 }
 229
 230 /**
 231  * \fn Uint64 VT_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 232  * \brief Read from a virtual terminal
 233  */
 234 Uint64 VT_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 235 {
 236          int    pos = 0;
 237         tVTerm  *term = &gVT_Terminals[ Node->Inode ];
 238
 239         // Check current mode
 240         switch(term->Mode)
 241         {
 242         case VT_MODE_TEXT8:
 243                 while(pos < Length)
 244                 {
 245                         while(term->InputRead == term->InputWrite)      Threads_Yield();
 246                         while(term->InputRead != term->InputWrite)
 247                         {
 248                                 pos += WriteUTF8(Buffer+pos, term->InputBuffer[term->InputRead]);
 249                                 term->InputRead ++;
 250                                 term->InputRead %= MAX_INPUT_CHARS;
 251                         }
 252                 }
 253                 break;
 254
 255         case VT_MODE_TEXT32:
 256                 while(pos < Length)
 257                 {
 258                         while(term->InputRead == term->InputWrite)      Threads_Yield();
 259                         while(term->InputRead != term->InputWrite)
 260                         {
 261                                 ((Uint32*)Buffer)[pos] = term->InputBuffer[term->InputRead];
 262                                 pos ++;
 263                                 term->InputRead ++;
 264                                 term->InputRead %= MAX_INPUT_CHARS;
 265                         }
 266                 }
 267                 break;
 268         }
 269         return 0;
 270 }
 271
 272 /**
 273  * \fn Uint64 VT_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 274  * \brief Write to a virtual terminal
 275  */
 276 Uint64 VT_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 277 {
 278         tVTerm  *term = &gVT_Terminals[ Node->Inode ];
 279
 280         //ENTER("pNode XOffset XLength pBuffer",  Node, Offset, Length, Buffer);
 281
 282         // Write
 283         switch( term->Mode )
 284         {
 285         case VT_MODE_TEXT8:
 286                 VT_int_PutString(term, Buffer, Length);
 287                 break;
 288         case VT_MODE_TEXT32:
 289                 //VT_int_PutString32(term, Buffer, Length);
 290                 break;
 291         }
 292
 293         //LEAVE('i', 0);
 294         return 0;
 295 }
 296
 297 /**
 298  * \fn int VT_IOCtl(tVFS_Node *Node, int Id, void *Data)
 299  * \brief Call an IO Control on a virtual terminal
 300  */
 301 int VT_IOCtl(tVFS_Node *Node, int Id, void *Data)
 302 {
 303         return 0;
 304 }
 305
 306 /**
 307  * \fn void VT_KBCallBack(Uint32 Codepoint)
 308  * \brief Called on keyboard interrupt
 309  */
 310 void VT_KBCallBack(Uint32 Codepoint)
 311 {
 312         tVTerm  *term = &gVT_Terminals[giVT_CurrentTerminal];
 313
 314         term->InputBuffer[ term->InputWrite ] = Codepoint;
 315         term->InputWrite ++;
 316         term->InputWrite %= MAX_INPUT_CHARS;
 317         if(term->InputRead == term->InputWrite) {
 318                 term->InputRead ++;
 319                 term->InputRead %= MAX_INPUT_CHARS;
 320         }
 321 }
 322
 323 /**
 324  * \fn void VT_int_PutString(tVTerm *Term, Uint8 *Buffer, Uint Count)
 325  * \brief Print a string to the Virtual Terminal
 326  */
 327 void VT_int_PutString(tVTerm *Term, Uint8 *Buffer, Uint Count)
 328 {
 329         Uint32  val;
 330          int    i;
 331         for( i = 0; i < Count; i++ )
 332         {
 333                 if( Buffer[i] == 0x1B ) // Escape Sequence
 334                 {
 335                         i ++;
 336                         i += VT_int_ParseEscape(Term, (char*)&Buffer[i]);
 337                         continue;
 338                 }
 339
 340                 if( Buffer[i] < 128 )   // Plain ASCII
 341                         VT_int_PutChar(Term, Buffer[i]);
 342                 else {  // UTF-8
 343                         i += ReadUTF8(&Buffer[i], &val);
 344                         VT_int_PutChar(Term, val);
 345                 }
 346         }
 347
 348         // Update cursor
 349         if( !(Term->Flags & VT_FLAG_HIDECSR) )
 350         {
 351                 tVideo_IOCtl_Pos        pos;
 352                 pos.x = Term->WritePos % Term->Width;
 353                 pos.y = Term->WritePos / Term->Width;
 354                 VFS_IOCtl(giVT_OutputDevHandle, VIDEO_IOCTL_SETCURSOR, &pos);
 355         }
 356 }
 357
 358 /**
 359  * \fn void VT_int_ClearLine(tVTerm *Term, int Num)
 360  * \brief Clears a line in a virtual terminal
 361  */
 362 void VT_int_ClearLine(tVTerm *Term, int Num)
 363 {
 364          int    i;
 365         //ENTER("pTerm iNum", Term, Num);
 366         for( i = Term->Width; i--; )
 367         {
 368                 Term->Text[ Num*Term->Width + i ].Ch = 0;
 369                 Term->Text[ Num*Term->Width + i ].Colour = Term->CurColour;
 370         }
 371         //LEAVE('-');
 372 }
 373
 374 /**
 375  * \fn int VT_int_ParseEscape(tVTerm *Term, char *Buffer)
 376  * \brief Parses a VT100 Escape code
 377  */
 378 int VT_int_ParseEscape(tVTerm *Term, char *Buffer)
 379 {
 380         char    c;
 381          int    argc = 0, j = 1;
 382          int    args[4] = {0,0,0,0};
 383
 384         switch(Buffer[0]) {
 385         //Large Code
 386         case '[':
 387                 // Get Arguments
 388                 c = Buffer[1];
 389                 do {
 390                         while('0' <= c && c <= '9') {
 391                                 args[argc] *= 10;
 392                                 args[argc] += c-'0';
 393                                 c = Buffer[++j];
 394                         }
 395                         argc ++;
 396                 } while(c == ';');
 397
 398                 // Get string (what does this do?)
 399                 if(c == '"') {
 400                         c = Buffer[++j];
 401                         while(c != '"')
 402                                 c = Buffer[++j];
 403                 }
 404
 405                 // Get Command
 406                 if(     ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z'))
 407                 {
 408                         switch(c) {
 409                         //Clear By Line
 410                         case 'J':
 411                                 // Clear Screen
 412                                 switch(args[0])
 413                                 {
 414                                 case 2:
 415                                         {
 416                                          int    i = Term->Height * VT_SCROLLBACK;
 417                                         while( i-- )    VT_int_ClearLine(Term, i);
 418                                         Term->WritePos = 0;
 419                                         Term->ViewPos = 0;
 420                                         VT_int_UpdateScreen(Term, 1);
 421                                         }
 422                                         break;
 423                                 }
 424                                 break;
 425                         // Set Font flags
 426                         case 'm':
 427                                 for( ; argc--; )
 428                                 {
 429                                         // Flags
 430                                         if( 0 <= args[argc] && args[argc] <= 8)
 431                                         {
 432                                                 switch(args[argc])
 433                                                 {
 434                                                 case 0: Term->CurColour = DEFAULT_COLOUR;       break;  // Reset
 435                                                 case 1: Term->CurColour |= 0x80000000;  break;  // Bright
 436                                                 case 2: Term->CurColour &= ~0x80000000; break;  // Dim
 437                                                 }
 438                                         }
 439                                         // Foreground Colour
 440                                         else if(30 <= args[argc] && args[argc] <= 37) {
 441                                                 Term->CurColour &= 0xF000FFFF;
 442                                                 Term->CurColour |= (Uint32)caVT100Colours[ args[argc]-30+(Term->CurColour>>28) ] << 16;
 443                                         }
 444                                         // Background Colour
 445                                         else if(40 <= args[argc] && args[argc] <= 47) {
 446                                                 Term->CurColour &= 0xFFFF8000;
 447                                                 Term->CurColour |= caVT100Colours[ args[argc]-40+((Term->CurColour>>12)&15) ];
 448                                         }
 449                                 }
 450                                 break;
 451                         }
 452                 }
 453                 break;
 454
 455         default:
 456                 break;
 457         }
 458
 459         return j + 1;
 460 }
 461
 462 /**
 463  * \fn void VT_int_PutChar(tVTerm *Term, Uint32 Ch)
 464  * \brief Write a single character to a VTerm
 465  */
 466 void VT_int_PutChar(tVTerm *Term, Uint32 Ch)
 467 {
 468          int    i;
 469         //ENTER("pTerm xCh", Term, Ch);
 470         //LOG("Term = {WritePos:%i, ViewPos:%i}\n", Term->WritePos, Term->ViewPos);
 471
 472         switch(Ch)
 473         {
 474         case 0: return; // Ignore NULL byte
 475         case '\n':
 476                 LOG("%i += %i", Term->WritePos, Term->Width);
 477                 Term->WritePos += Term->Width;
 478         case '\r':
 479                 Term->WritePos -= Term->WritePos % Term->Width;
 480                 break;
 481
 482         case '\t':
 483                 do {
 484                         Term->Text[ Term->WritePos ].Ch = '\t';
 485                         Term->Text[ Term->WritePos ].Colour = Term->CurColour;
 486                         Term->WritePos ++;
 487                 } while(Term->WritePos & 7);
 488                 break;
 489
 490         case '\b':
 491                 // Backspace is invalid at Offset 0
 492                 if(Term->WritePos == 0) break;
 493
 494                 Term->WritePos --;
 495                 // Singe Character
 496                 if(Term->Text[ Term->WritePos ].Ch != '\t') {
 497                         Term->Text[ Term->WritePos ].Ch = 0;
 498                         Term->Text[ Term->WritePos ].Colour = Term->CurColour;
 499                         break;
 500                 }
 501                 // Tab
 502                 i = 7;  // Limit it to 8
 503                 do {
 504                         Term->Text[ Term->WritePos ].Ch = 0;
 505                         Term->Text[ Term->WritePos ].Colour = Term->CurColour;
 506                         Term->WritePos --;
 507                 } while(Term->WritePos && i-- && Term->Text[ Term->WritePos ].Ch == '\t');
 508                 break;
 509
 510         default:
 511                 Term->Text[ Term->WritePos ].Ch = Ch;
 512                 Term->Text[ Term->WritePos ].Colour = Term->CurColour;
 513                 Term->WritePos ++;
 514                 break;
 515         }
 516
 517
 518         // Move Screen
 519         if(Term->WritePos >= Term->Width*Term->Height*VT_SCROLLBACK)
 520         {
 521                  int    base, i;
 522                 Term->WritePos -= Term->Width;
 523
 524                 // Update view position
 525                 base = Term->Width*Term->Height*(VT_SCROLLBACK-1);
 526                 if(Term->ViewPos < base)        Term->ViewPos += Term->Width;
 527                 if(Term->ViewPos > base)        Term->ViewPos = base;
 528
 529                 // Scroll terminal cache
 530                 base = Term->Width*(Term->Height*VT_SCROLLBACK-1);
 531
 532                 // Scroll Back
 533                 memcpy(
 534                         Term->Text,
 535                         &Term->Text[Term->Width],
 536                         Term->Width*(Term->Height-1)*VT_SCROLLBACK*sizeof(tVT_Char)
 537                         );
 538
 539                 // Clear last row
 540                 for( i = 0; i < Term->Width; i ++ )
 541                 {
 542                         Term->Text[ base + i ].Ch = 0;
 543                         Term->Text[ base + i ].Colour = Term->CurColour;
 544                 }
 545
 546                 VT_int_UpdateScreen( Term, 1 );
 547         }
 548         else if(Term->WritePos > Term->Width*Term->Height+Term->ViewPos)
 549         {
 550                 Term->ViewPos += Term->Width;
 551                 VT_int_UpdateScreen( Term, 1 );
 552         }
 553         else
 554                 VT_int_UpdateScreen( Term, 0 );
 555
 556         //LEAVE('-');
 557 }
 558
 559 /**
 560  * \fn void VT_int_UpdateScreen( tVTerm *Term, int UpdateAll )
 561  * \brief Updates the video framebuffer
 562  */
 563 void VT_int_UpdateScreen( tVTerm *Term, int UpdateAll )
 564 {
 565         if(UpdateAll) {
 566                 VFS_WriteAt(
 567                         giVT_OutputDevHandle,
 568                         0,
 569                         Term->Width*Term->Height*sizeof(tVT_Char),
 570                         &Term->Text[Term->ViewPos]
 571                         );
 572         } else {
 573                  int    pos = Term->WritePos - Term->WritePos % Term->Width;
 574                 VFS_WriteAt(
 575                         giVT_OutputDevHandle,
 576                         (pos - Term->ViewPos)*sizeof(tVT_Char),
 577                         Term->Width*sizeof(tVT_Char),
 578                         &Term->Text[pos]
 579                         );
 580         }
 581 }
 582
 583 // ---
 584 // Font Render
 585 // ---
 586 #define MONOSPACE_FONT  10816
 587
 588 #if MONOSPACE_FONT == 10808     // 8x8
 589 # include "vterm_font_8x8.h"
 590 #elif MONOSPACE_FONT == 10816   // 8x16
 591 # include "vterm_font_8x16.h"
 592 #endif
 593
 594
 595 int VT_Font_GetWidth(Uint32 Codepoint)
 596 {
 597         return FONT_WIDTH;
 598 }
 599 int VT_Font_GetHeight(Uint32 Codepoint)
 600 {
 601         return FONT_HEIGHT;
 602 }
 603
 604 void VT_Font_Render(Uint32 Codepoint, void *Buffer, Uint32 BGC, Uint32 FGC)
 605 {
 606 //      Uint8   *font;
 607
 608 }
 609
 610 /**
 611  * \fn Uint8 *VT_Font_GetChar(Uint32 Codepoint)
 612  * \brief Gets an index into the font array given a Unicode Codepoint
 613  * \note See http://en.wikipedia.org/wiki/CP437
 614  */
 615 Uint8 *VT_Font_GetChar(Uint32 Codepoint)
 616 {
 617          int    index = 0;
 618         if(Codepoint < 128)
 619                 return &VTermFont[Codepoint*FONT_HEIGHT];
 620         switch(Codepoint)
 621         {
 622         case 0xC7:      index = 128;    break;  // Ç
 623         case 0xFC:      index = 129;    break;  // ü
 624         case 0xE9:      index = 130;    break;  // é
 625         case 0xE2:      index = 131;    break;  // â
 626         case 0xE4:      index = 132;    break;  // ä
 627         case 0xE0:      index = 133;    break;  // à
 628         case 0xE5:      index = 134;    break;  // å
 629         case 0xE7:      index = 135;    break;  // ç
 630         case 0xEA:      index = 136;    break;  // ê
 631         case 0xEB:      index = 137;    break;  // ë
 632         case 0xE8:      index = 138;    break;  // è
 633         case 0xEF:      index = 139;    break;  // ï
 634         case 0xEE:      index = 140;    break;  // î
 635         case 0xEC:      index = 141;    break;  // ì
 636         case 0xC4:      index = 142;    break;  // Ä
 637         case 0xC5:      index = 143;    break;  // Å
 638         }
 639
 640         return &VTermFont[index*FONT_HEIGHT];
 641 }