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)      Proc_Yield();
 246                         while(term->InputRead != term->InputWrite)
 247                         {
 248                                 LOG("WriteUTF8(%p, 0x%x)", Buffer+pos, term->InputBuffer[term->InputRead]);
 249                                 pos += WriteUTF8(Buffer+pos, term->InputBuffer[term->InputRead]);
 250                                 term->InputRead ++;
 251                                 term->InputRead %= MAX_INPUT_CHARS;
 252                         }
 253                 }
 254                 break;
 255
 256         case VT_MODE_TEXT32:
 257                 while(pos < Length)
 258                 {
 259                         while(term->InputRead == term->InputWrite)      Proc_Yield();
 260                         while(term->InputRead != term->InputWrite)
 261                         {
 262                                 ((Uint32*)Buffer)[pos] = term->InputBuffer[term->InputRead];
 263                                 pos ++;
 264                                 term->InputRead ++;
 265                                 term->InputRead %= MAX_INPUT_CHARS;
 266                         }
 267                 }
 268                 break;
 269         }
 270         return 0;
 271 }
 272
 273 /**
 274  * \fn Uint64 VT_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 275  * \brief Write to a virtual terminal
 276  */
 277 Uint64 VT_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 278 {
 279         tVTerm  *term = &gVT_Terminals[ Node->Inode ];
 280
 281         //ENTER("pNode XOffset XLength pBuffer",  Node, Offset, Length, Buffer);
 282
 283         // Write
 284         switch( term->Mode )
 285         {
 286         case VT_MODE_TEXT8:
 287                 VT_int_PutString(term, Buffer, Length);
 288                 break;
 289         case VT_MODE_TEXT32:
 290                 //VT_int_PutString32(term, Buffer, Length);
 291                 break;
 292         }
 293
 294         //LEAVE('i', 0);
 295         return 0;
 296 }
 297
 298 /**
 299  * \fn int VT_IOCtl(tVFS_Node *Node, int Id, void *Data)
 300  * \brief Call an IO Control on a virtual terminal
 301  */
 302 int VT_IOCtl(tVFS_Node *Node, int Id, void *Data)
 303 {
 304         return 0;
 305 }
 306
 307 /**
 308  * \fn void VT_KBCallBack(Uint32 Codepoint)
 309  * \brief Called on keyboard interrupt
 310  */
 311 void VT_KBCallBack(Uint32 Codepoint)
 312 {
 313         tVTerm  *term = &gVT_Terminals[giVT_CurrentTerminal];
 314
 315         term->InputBuffer[ term->InputWrite ] = Codepoint;
 316         term->InputWrite ++;
 317         term->InputWrite %= MAX_INPUT_CHARS;
 318         if(term->InputRead == term->InputWrite) {
 319                 term->InputRead ++;
 320                 term->InputRead %= MAX_INPUT_CHARS;
 321         }
 322 }
 323
 324 /**
 325  * \fn void VT_int_PutString(tVTerm *Term, Uint8 *Buffer, Uint Count)
 326  * \brief Print a string to the Virtual Terminal
 327  */
 328 void VT_int_PutString(tVTerm *Term, Uint8 *Buffer, Uint Count)
 329 {
 330         Uint32  val;
 331          int    i;
 332         for( i = 0; i < Count; i++ )
 333         {
 334                 if( Buffer[i] == 0x1B ) // Escape Sequence
 335                 {
 336                         i ++;
 337                         i += VT_int_ParseEscape(Term, (char*)&Buffer[i]);
 338                         continue;
 339                 }
 340
 341                 if( Buffer[i] < 128 )   // Plain ASCII
 342                         VT_int_PutChar(Term, Buffer[i]);
 343                 else {  // UTF-8
 344                         i += ReadUTF8(&Buffer[i], &val);
 345                         VT_int_PutChar(Term, val);
 346                 }
 347         }
 348
 349         // Update cursor
 350         if( !(Term->Flags & VT_FLAG_HIDECSR) )
 351         {
 352                 tVideo_IOCtl_Pos        pos;
 353                 pos.x = Term->WritePos % Term->Width;
 354                 pos.y = Term->WritePos / Term->Width;
 355                 VFS_IOCtl(giVT_OutputDevHandle, VIDEO_IOCTL_SETCURSOR, &pos);
 356         }
 357 }
 358
 359 /**
 360  * \fn void VT_int_ClearLine(tVTerm *Term, int Num)
 361  * \brief Clears a line in a virtual terminal
 362  */
 363 void VT_int_ClearLine(tVTerm *Term, int Num)
 364 {
 365          int    i;
 366         memset(Term->Text, 0, Term->Width*Term->Height*VT_SCROLLBACK*sizeof(tVT_Char));
 367         for( i = Term->Width; i++; )
 368         {
 369                 Term->Text[ Num*Term->Width + i ].Ch = 0;
 370                 Term->Text[ Num*Term->Width + i ].Colour = Term->CurColour;
 371         }
 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                 Term->WritePos += Term->Width;
 477         case '\r':
 478                 Term->WritePos -= Term->WritePos % Term->Width;
 479                 break;
 480
 481         case '\t':
 482                 do {
 483                         Term->Text[ Term->WritePos ].Ch = '\t';
 484                         Term->Text[ Term->WritePos ].Colour = Term->CurColour;
 485                         Term->WritePos ++;
 486                 } while(Term->WritePos & 7);
 487                 break;
 488
 489         case '\b':
 490                 // Backspace is invalid at Offset 0
 491                 if(Term->WritePos == 0) break;
 492
 493                 Term->WritePos --;
 494                 // Singe Character
 495                 if(Term->Text[ Term->WritePos ].Ch != '\t') {
 496                         Term->Text[ Term->WritePos ].Ch = 0;
 497                         Term->Text[ Term->WritePos ].Colour = Term->CurColour;
 498                         break;
 499                 }
 500                 // Tab
 501                 i = 7;  // Limit it to 8
 502                 do {
 503                         Term->Text[ Term->WritePos ].Ch = 0;
 504                         Term->Text[ Term->WritePos ].Colour = Term->CurColour;
 505                         Term->WritePos --;
 506                 } while(Term->WritePos && i-- && Term->Text[ Term->WritePos ].Ch == '\t');
 507                 break;
 508
 509         default:
 510                 Term->Text[ Term->WritePos ].Ch = Ch;
 511                 Term->Text[ Term->WritePos ].Colour = Term->CurColour;
 512                 Term->WritePos ++;
 513                 break;
 514         }
 515
 516
 517         // Move Screen
 518         if(Term->WritePos >= Term->Width*Term->Height*VT_SCROLLBACK)
 519         {
 520                  int    base, i;
 521                 Term->WritePos -= Term->Width;
 522
 523                 // Update view position
 524                 base = Term->Width*Term->Height*(VT_SCROLLBACK-1);
 525                 if(Term->ViewPos < base)        Term->ViewPos += Term->Width;
 526                 if(Term->ViewPos > base)        Term->ViewPos = base;
 527
 528                 // Scroll terminal cache
 529                 base = Term->Width*(Term->Height*VT_SCROLLBACK-1);
 530
 531                 // Scroll Back
 532                 memcpy(
 533                         Term->Text,
 534                         &Term->Text[Term->Width],
 535                         Term->Width*(Term->Height-1)*VT_SCROLLBACK*sizeof(tVT_Char)
 536                         );
 537
 538                 // Clear last row
 539                 for( i = 0; i < Term->Width; i ++ )
 540                 {
 541                         Term->Text[ base + i ].Ch = 0;
 542                         Term->Text[ base + i ].Colour = Term->CurColour;
 543                 }
 544
 545                 VT_int_UpdateScreen( Term, 1 );
 546         }
 547         else if(Term->WritePos > Term->Width*Term->Height+Term->ViewPos)
 548         {
 549                 Term->ViewPos += Term->Width;
 550                 VT_int_UpdateScreen( Term, 1 );
 551         }
 552         else
 553                 VT_int_UpdateScreen( Term, 0 );
 554
 555         //LEAVE('-');
 556 }
 557
 558 /**
 559  * \fn void VT_int_UpdateScreen( tVTerm *Term, int UpdateAll )
 560  * \brief Updates the video framebuffer
 561  */
 562 void VT_int_UpdateScreen( tVTerm *Term, int UpdateAll )
 563 {
 564         if(UpdateAll) {
 565                 VFS_WriteAt(
 566                         giVT_OutputDevHandle,
 567                         0,
 568                         Term->Width*Term->Height*sizeof(tVT_Char),
 569                         &Term->Text[Term->ViewPos]
 570                         );
 571         } else {
 572                  int    pos = Term->WritePos - Term->WritePos % Term->Width;
 573                 VFS_WriteAt(
 574                         giVT_OutputDevHandle,
 575                         (pos - Term->ViewPos)*sizeof(tVT_Char),
 576                         Term->Width*sizeof(tVT_Char),
 577                         &Term->Text[pos]
 578                         );
 579         }
 580 }
 581
 582 // ---
 583 // Font Render
 584 // ---
 585 #define MONOSPACE_FONT  10816
 586
 587 #if MONOSPACE_FONT == 10808     // 8x8
 588 # include "vterm_font_8x8.h"
 589 #elif MONOSPACE_FONT == 10816   // 8x16
 590 # include "vterm_font_8x16.h"
 591 #endif
 592
 593
 594 int VT_Font_GetWidth(Uint32 Codepoint)
 595 {
 596         return FONT_WIDTH;
 597 }
 598 int VT_Font_GetHeight(Uint32 Codepoint)
 599 {
 600         return FONT_HEIGHT;
 601 }
 602
 603 void VT_Font_Render(Uint32 Codepoint, void *Buffer, Uint32 BGC, Uint32 FGC)
 604 {
 605 //      Uint8   *font;
 606
 607 }
 608
 609 /**
 610  * \fn Uint8 *VT_Font_GetChar(Uint32 Codepoint)
 611  * \brief Gets an index into the font array given a Unicode Codepoint
 612  * \note See http://en.wikipedia.org/wiki/CP437
 613  */
 614 Uint8 *VT_Font_GetChar(Uint32 Codepoint)
 615 {
 616          int    index = 0;
 617         if(Codepoint < 128)
 618                 return &VTermFont[Codepoint*FONT_HEIGHT];
 619         switch(Codepoint)
 620         {
 621         case 0xC7:      index = 128;    break;  // Ç
 622         case 0xFC:      index = 129;    break;  // ü
 623         case 0xE9:      index = 130;    break;  // é
 624         case 0xE2:      index = 131;    break;  // â
 625         case 0xE4:      index = 132;    break;  // ä
 626         case 0xE0:      index = 133;    break;  // à
 627         case 0xE5:      index = 134;    break;  // å
 628         case 0xE7:      index = 135;    break;  // ç
 629         case 0xEA:      index = 136;    break;  // ê
 630         case 0xEB:      index = 137;    break;  // ë
 631         case 0xE8:      index = 138;    break;  // è
 632         case 0xEF:      index = 139;    break;  // ï
 633         case 0xEE:      index = 140;    break;  // î
 634         case 0xEC:      index = 141;    break;  // ì
 635         case 0xC4:      index = 142;    break;  // Ä
 636         case 0xC5:      index = 143;    break;  // Å
 637         }
 638
 639         return &VTermFont[index*FONT_HEIGHT];
 640 }