Modules/Network/NE2000/ne2000.c

   1 /* Acess2
   2  * NE2000 Driver
   3  *
   4  * See: ~/Sources/bochs/bochs.../iodev/ne2k.cc
   5  */
   6 #define DEBUG   0
   7 #define VERSION ((0<<8)|50)
   8 #include <acess.h>
   9 #include <modules.h>
  10 #include <fs_devfs.h>
  11 #include <drv_pci.h>
  12 #include <tpl_drv_network.h>
  13 #include <semaphore.h>
  14
  15 // === CONSTANTS ===
  16 #define MEM_START       0x40
  17 #define MEM_END         0xC0
  18 #define RX_FIRST        (MEM_START)
  19 #define RX_LAST         (MEM_START+RX_BUF_SIZE-1)
  20 #define RX_BUF_SIZE     0x40
  21 #define TX_FIRST        (MEM_START+RX_BUF_SIZE)
  22 #define TX_LAST         (MEM_END)
  23 #define TX_BUF_SIZE     0x40
  24 #define MAX_PACKET_QUEUE        10
  25
  26 static const struct {
  27         Uint16  Vendor;
  28         Uint16  Device;
  29 } csaCOMPAT_DEVICES[] = {
  30         {0x10EC, 0x8029},       // Realtek 8029
  31         {0x10EC, 0x8129}        // Realtek 8129
  32 };
  33 #define NUM_COMPAT_DEVICES      ((int)(sizeof(csaCOMPAT_DEVICES)/sizeof(csaCOMPAT_DEVICES[0])))
  34
  35 enum eNe2k_Page0Read {
  36         CMD = 0,        //!< the master command register
  37         CLDA0,          //!< Current Local DMA Address 0
  38         CLDA1,          //!< Current Local DMA Address 1
  39         BNRY,           //!< Boundary Pointer (for ringbuffer)
  40         TSR,            //!< Transmit Status Register
  41         NCR,            //!< collisions counter
  42         FIFO,           //!< (for what purpose ??)
  43         ISR,            //!< Interrupt Status Register
  44         CRDA0,          //!< Current Remote DMA Address 0
  45         CRDA1,          //!< Current Remote DMA Address 1
  46         RSR = 0xC       //!< Receive Status Register
  47 };
  48
  49 enum eNe2k_Page0Write {
  50         PSTART = 1,     //!< page start (init only)
  51         PSTOP,          //!< page stop  (init only)
  52         TPSR = 4,       //!< transmit page start address
  53         TBCR0,          //!< transmit byte count (low)
  54         TBCR1,          //!< transmit byte count (high)
  55         RSAR0 = 8,      //!< remote start address (lo)
  56         RSAR1,  //!< remote start address (hi)
  57         RBCR0,  //!< remote byte count (lo)
  58         RBCR1,  //!< remote byte count (hi)
  59         RCR,    //!< receive config register
  60         TCR,    //!< transmit config register
  61         DCR,    //!< data config register    (init)
  62         IMR             //!< interrupt mask register (init)
  63 };
  64
  65 enum eNe2k_Page1Read {
  66         CURR = 7        //!< current page
  67 };
  68
  69 // === TYPES ===
  70 typedef struct sNe2k_Card {
  71         Uint16  IOBase; //!< IO Port Address from PCI
  72         Uint8   IRQ;    //!< IRQ Assigned from PCI
  73
  74         tSemaphore      Semaphore;      //!< Semaphore for incoming packets
  75          int    NextRXPage;     //!< Next expected RX page
  76
  77          int    NextMemPage;    //!< Next Card Memory page to use
  78
  79         //Uint8 Buffer[RX_BUF_SIZE*256];
  80
  81         char    Name[2];        // "0"
  82         tVFS_Node       Node;   //!< VFS Node
  83         Uint8   MacAddr[6];     //!< Cached MAC address
  84 } tCard;
  85
  86 // === PROTOTYPES ===
  87  int    Ne2k_Install(char **Arguments);
  88 char    *Ne2k_ReadDir(tVFS_Node *Node, int Pos);
  89 tVFS_Node       *Ne2k_FindDir(tVFS_Node *Node, const char *Name);
  90  int    Ne2k_IOCtl(tVFS_Node *Node, int ID, void *Data);
  91 Uint64  Ne2k_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer);
  92 Uint64  Ne2k_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer);
  93
  94  int    Ne2k_int_ReadDMA(tCard *Card, int FirstPage, int NumPages, void *Buffer);
  95 Uint8   Ne2k_int_GetWritePage(tCard *Card, Uint16 Length);
  96 void    Ne2k_IRQHandler(int IntNum);
  97
  98 // === GLOBALS ===
  99 MODULE_DEFINE(0, VERSION, Ne2k, Ne2k_Install, NULL, NULL);
 100 tDevFS_Driver   gNe2k_DriverInfo = {
 101         NULL, "ne2k",
 102         {
 103         .NumACLs = 1,
 104         .ACLs = &gVFS_ACL_EveryoneRX,
 105         .Flags = VFS_FFLAG_DIRECTORY,
 106         .ReadDir = Ne2k_ReadDir,
 107         .FindDir = Ne2k_FindDir,
 108         .IOCtl = Ne2k_IOCtl
 109         }
 110 };
 111 Uint16  gNe2k_BaseAddress;
 112  int    giNe2k_CardCount = 0;
 113 tCard   *gpNe2k_Cards = NULL;
 114
 115 // === CODE ===
 116 /**
 117  * \fn int Ne2k_Install(char **Options)
 118  * \brief Installs the NE2000 Driver
 119  */
 120 int Ne2k_Install(char **Options)
 121 {
 122          int    i, j, k;
 123          int    count, id, base;
 124
 125         // --- Scan PCI Bus ---
 126         // Count Cards
 127         giNe2k_CardCount = 0;
 128         for( i = 0; i < NUM_COMPAT_DEVICES; i ++ )
 129         {
 130                 giNe2k_CardCount += PCI_CountDevices( csaCOMPAT_DEVICES[i].Vendor, csaCOMPAT_DEVICES[i].Device, 0 );
 131         }
 132
 133         if( giNe2k_CardCount == 0 ) {
 134                 Log_Warning("Ne2k", "No cards detected");
 135                 return MODULE_ERR_NOTNEEDED;
 136         }
 137
 138         // Enumerate Cards
 139         k = 0;
 140         gpNe2k_Cards = calloc( giNe2k_CardCount, sizeof(tCard) );
 141
 142         for( i = 0; i < NUM_COMPAT_DEVICES; i ++ )
 143         {
 144                 count = PCI_CountDevices( csaCOMPAT_DEVICES[i].Vendor, csaCOMPAT_DEVICES[i].Device, 0 );
 145                 for( j = 0; j < count; j ++,k ++ )
 146                 {
 147                         id = PCI_GetDevice( csaCOMPAT_DEVICES[i].Vendor, csaCOMPAT_DEVICES[i].Device, 0, j );
 148                         // Create Structure
 149                         base = PCI_AssignPort( id, 0, 0x20 );
 150                         gpNe2k_Cards[ k ].IOBase = base;
 151                         gpNe2k_Cards[ k ].IRQ = PCI_GetIRQ( id );
 152                         gpNe2k_Cards[ k ].NextMemPage = 64;
 153                         gpNe2k_Cards[ k ].NextRXPage = RX_FIRST;
 154
 155                         // Install IRQ Handler
 156                         IRQ_AddHandler(gpNe2k_Cards[ k ].IRQ, Ne2k_IRQHandler);
 157
 158                         // Reset Card
 159                         outb( base + 0x1F, inb(base + 0x1F) );
 160                         while( (inb( base+ISR ) & 0x80) == 0 );
 161                         outb( base + ISR, 0x80 );
 162
 163                         // Initialise Card
 164                         outb( base + CMD, 0x40|0x21 );  // Page 1, No DMA, Stop
 165                         outb( base + CURR, RX_FIRST );  // Current RX page
 166                         outb( base + CMD, 0x21 );       // No DMA and Stop
 167                         outb( base + DCR, 0x49 );       // Set WORD mode
 168                         outb( base + IMR, 0x00 );       // Interrupt Mask Register
 169                         outb( base + ISR, 0xFF );
 170                         outb( base + RCR, 0x20 );       // Reciever to Monitor
 171                         outb( base + TCR, 0x02 );       // Transmitter OFF (TCR.LB = 1, Internal Loopback)
 172                         outb( base + RBCR0, 6*4 );      // Remote Byte Count
 173                         outb( base + RBCR1, 0 );
 174                         outb( base + RSAR0, 0 );        // Clear Source Address
 175                         outb( base + RSAR1, 0 );
 176                         outb( base + CMD, 0x0A );       // Remote Read, Start
 177
 178                         // Read MAC Address
 179                         gpNe2k_Cards[ k ].MacAddr[0] = inb(base+0x10);//        inb(base+0x10);
 180                         gpNe2k_Cards[ k ].MacAddr[1] = inb(base+0x10);//        inb(base+0x10);
 181                         gpNe2k_Cards[ k ].MacAddr[2] = inb(base+0x10);//        inb(base+0x10);
 182                         gpNe2k_Cards[ k ].MacAddr[3] = inb(base+0x10);//        inb(base+0x10);
 183                         gpNe2k_Cards[ k ].MacAddr[4] = inb(base+0x10);//        inb(base+0x10);
 184                         gpNe2k_Cards[ k ].MacAddr[5] = inb(base+0x10);//        inb(base+0x10);
 185
 186                         outb( base+PSTART, RX_FIRST);   // Set Receive Start
 187                         outb( base+BNRY, RX_LAST-1);    // Set Boundary Page
 188                         outb( base+PSTOP, RX_LAST);     // Set Stop Page
 189                         outb( base+ISR, 0xFF ); // Clear all ints
 190                         outb( base+CMD, 0x22 ); // No DMA, Start
 191                         outb( base+IMR, 0x3F ); // Set Interupt Mask
 192                         outb( base+RCR, 0x0F ); // Set WRAP and allow all packet matches
 193                         outb( base+TCR, 0x00 ); // Set Normal Transmitter mode
 194                         outb( base+TPSR, 0x40); // Set Transmit Start
 195                         // Set MAC Address
 196                         /*
 197                         Ne2k_WriteReg(base, MAC0, gpNe2k_Cards[ k ].MacAddr[0]);
 198                         Ne2k_WriteReg(base, MAC1, gpNe2k_Cards[ k ].MacAddr[1]);
 199                         Ne2k_WriteReg(base, MAC2, gpNe2k_Cards[ k ].MacAddr[2]);
 200                         Ne2k_WriteReg(base, MAC3, gpNe2k_Cards[ k ].MacAddr[3]);
 201                         Ne2k_WriteReg(base, MAC4, gpNe2k_Cards[ k ].MacAddr[4]);
 202                         Ne2k_WriteReg(base, MAC5, gpNe2k_Cards[ k ].MacAddr[5]);
 203                         */
 204
 205                         Log_Log("Ne2k", "Card %i 0x%04x IRQ%i %02x:%02x:%02x:%02x:%02x:%02x",
 206                                 k, base, gpNe2k_Cards[ k ].IRQ,
 207                                 gpNe2k_Cards[k].MacAddr[0], gpNe2k_Cards[k].MacAddr[1],
 208                                 gpNe2k_Cards[k].MacAddr[2], gpNe2k_Cards[k].MacAddr[3],
 209                                 gpNe2k_Cards[k].MacAddr[4], gpNe2k_Cards[k].MacAddr[5]
 210                                 );
 211
 212                         // Set VFS Node
 213                         gpNe2k_Cards[ k ].Name[0] = '0'+k;
 214                         gpNe2k_Cards[ k ].Name[1] = '\0';
 215                         gpNe2k_Cards[ k ].Node.ImplPtr = &gpNe2k_Cards[ k ];
 216                         gpNe2k_Cards[ k ].Node.NumACLs = 0;     // Root Only
 217                         gpNe2k_Cards[ k ].Node.CTime = now();
 218                         gpNe2k_Cards[ k ].Node.Write = Ne2k_Write;
 219                         gpNe2k_Cards[ k ].Node.Read = Ne2k_Read;
 220                         gpNe2k_Cards[ k ].Node.IOCtl = Ne2k_IOCtl;
 221
 222                         // Initialise packet semaphore
 223                         // - Start at zero, no max
 224                         Semaphore_Init( &gpNe2k_Cards[k].Semaphore, 0, 0, "NE2000", gpNe2k_Cards[ k ].Name );
 225                 }
 226         }
 227
 228         gNe2k_DriverInfo.RootNode.Size = giNe2k_CardCount;
 229         DevFS_AddDevice( &gNe2k_DriverInfo );
 230         return MODULE_ERR_OK;
 231 }
 232
 233 /**
 234  * \fn char *Ne2k_ReadDir(tVFS_Node *Node, int Pos)
 235  */
 236 char *Ne2k_ReadDir(tVFS_Node *Node, int Pos)
 237 {
 238         char    ret[2];
 239         if(Pos < 0 || Pos >= giNe2k_CardCount)  return NULL;
 240         ret[0] = '0'+Pos;
 241         ret[1] = '\0';
 242         return strdup(ret);
 243 }
 244
 245 /**
 246  * \fn tVFS_Node *Ne2k_FindDir(tVFS_Node *Node, const char *Name)
 247  */
 248 tVFS_Node *Ne2k_FindDir(tVFS_Node *Node, const char *Name)
 249 {
 250         if(Name[0] == '\0' || Name[1] != '\0')  return NULL;
 251
 252         return &gpNe2k_Cards[ Name[0]-'0' ].Node;
 253 }
 254
 255 static const char *casIOCtls[] = { DRV_IOCTLNAMES, DRV_NETWORK_IOCTLNAMES, NULL };
 256 /**
 257  * \fn int Ne2k_IOCtl(tVFS_Node *Node, int ID, void *Data)
 258  * \brief IOCtl calls for a network device
 259  */
 260 int Ne2k_IOCtl(tVFS_Node *Node, int ID, void *Data)
 261 {
 262         ENTER("pNode iID pData", Node, ID, Data);
 263         switch( ID )
 264         {
 265         BASE_IOCTLS(DRV_TYPE_NETWORK, "NE2000", VERSION, casIOCtls);
 266         }
 267
 268         // If this is the root, return
 269         if( Node == &gNe2k_DriverInfo.RootNode ) {
 270                 LEAVE('i', 0);
 271                 return 0;
 272         }
 273
 274         // Device specific settings
 275         switch( ID )
 276         {
 277         case NET_IOCTL_GETMAC:
 278                 if( !CheckMem(Data, 6) ) {
 279                         LEAVE('i', -1);
 280                         return -1;
 281                 }
 282                 memcpy( Data, ((tCard*)Node->ImplPtr)->MacAddr, 6 );
 283                 LEAVE('i', 1);
 284                 return 1;
 285         }
 286         LEAVE('i', 0);
 287         return 0;
 288 }
 289
 290 /**
 291  * \fn Uint64 Ne2k_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 292  * \brief Send a packet from the network card
 293  */
 294 Uint64 Ne2k_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 295 {
 296         tCard   *Card = (tCard*)Node->ImplPtr;
 297         Uint16  *buf = Buffer;
 298          int    rem = Length;
 299          int    page;
 300
 301         ENTER("pNode XOffset XLength pBuffer", Node, Offset, Length, Buffer);
 302
 303         // Sanity Check Length
 304         if(Length > TX_BUF_SIZE*256) {
 305                 Log_Warning(
 306                         "Ne2k",
 307                         "Ne2k_Write - Attempting to send over TX_BUF_SIZE*256 (%i) bytes (%i)",
 308                         TX_BUF_SIZE*256, Length
 309                         );
 310                 LEAVE('i', 0);
 311                 return 0;
 312         }
 313
 314         // Make sure that the card is in page 0
 315         outb(Card->IOBase + CMD, 0|0x22);       // Page 0, Start, NoDMA
 316
 317         // Clear Remote DMA Flag
 318         outb(Card->IOBase + ISR, 0x40); // Bit 6
 319
 320         // Send Size - Transfer Byte Count Register
 321         outb(Card->IOBase + TBCR0, Length & 0xFF);
 322         outb(Card->IOBase + TBCR1, Length >> 8);
 323
 324         // Send Size - Remote Byte Count Register
 325         outb(Card->IOBase + RBCR0, Length & 0xFF);
 326         outb(Card->IOBase + RBCR1, Length >> 8);
 327
 328         // Set up transfer
 329         outb(Card->IOBase + RSAR0, 0x00);       // Page Offset
 330         page = Ne2k_int_GetWritePage(Card, Length);
 331         outb(Card->IOBase + RSAR1, page);       // Page Offset
 332         // Start
 333         outb(Card->IOBase + CMD, 0|0x10|0x2);   // Page 0, Remote Write, Start
 334
 335         // Send Data
 336         for(rem = Length; rem > 0; rem -= 2) {
 337                 outw(Card->IOBase + 0x10, *buf++);
 338         }
 339
 340         while( !(inb(Card->IOBase + ISR) & 0x40) )      // Wait for Remote DMA Complete
 341                 ;       //Proc_Yield();
 342
 343         outb( Card->IOBase + ISR, 0x40 );       // ACK Interrupt
 344
 345         // Send Packet
 346         outb(Card->IOBase + TPSR, page);
 347         outb(Card->IOBase + CMD, 0|0x10|0x4|0x2);
 348
 349         // Complete DMA
 350         //outb(Card->IOBase + CMD, 0|0x20);
 351
 352         LEAVE('i', Length);
 353         return Length;
 354 }
 355
 356 /**
 357  * \fn Uint64 Ne2k_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 358  * \brief Wait for and read a packet from the network card
 359  */
 360 Uint64 Ne2k_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 361 {
 362         tCard   *Card = (tCard*)Node->ImplPtr;
 363         Uint8   page;
 364         Uint8   data[256];
 365         struct {
 366                 Uint8   Status;
 367                 Uint8   NextPacketPage;
 368                 Uint16  Length; // Little Endian
 369         }       *pktHdr;
 370
 371         ENTER("pNode XOffset XLength pBuffer", Node, Offset, Length, Buffer);
 372
 373         // Wait for packets
 374         Semaphore_Wait( &Card->Semaphore, 1 );
 375
 376         outb(Card->IOBase, 0x22 | (1 << 6));    // Page 6
 377         LOG("CURR : 0x%02x", inb(Card->IOBase + CURR));
 378
 379         // Get current read page
 380         page = Card->NextRXPage;
 381         LOG("page = %i", page);
 382
 383         Ne2k_int_ReadDMA(Card, page, 1, data);
 384
 385         pktHdr = (void*)data;
 386
 387         LOG("pktHdr->Status = 0x%x", pktHdr->Status);
 388         LOG("pktHdr->NextPacketPage = %i", pktHdr->NextPacketPage);
 389         LOG("pktHdr->Length = 0x%03x", pktHdr->Length);
 390
 391         // Have we read all the required bytes yet?
 392         if(pktHdr->Length < 256 - 4)
 393         {
 394                 if(Length > pktHdr->Length)
 395                         Length = pktHdr->Length;
 396                 memcpy(Buffer, &data[4], Length);
 397         }
 398         // No? oh damn, now we need to allocate a buffer
 399         else
 400         {
 401                  int    pages = pktHdr->NextPacketPage - page;
 402                 char    *buf = malloc( pages*256 );
 403
 404                 LOG("pktHdr->Length (%i) > 256 - 4, allocated buffer %p", pktHdr->Length, buf);
 405
 406                 if(!buf) {
 407                         LEAVE('i', -1);
 408                         return -1;
 409                 }
 410
 411                 // Copy the already read data
 412                 memcpy(buf, data, 256);
 413
 414                 // Read all the needed pages
 415                 page ++;
 416                 if(page == RX_LAST+1)   page = RX_FIRST;
 417
 418                 if( page + pages > RX_LAST )
 419                 {
 420                          int    first_count = RX_LAST+1 - page;
 421                          int    tmp = 0;
 422                         tmp += Ne2k_int_ReadDMA(Card, page, first_count, buf+256);
 423                         tmp += Ne2k_int_ReadDMA(Card, RX_FIRST, pages-1-first_count, buf+(first_count+1)*256);
 424                         LOG("composite return count = %i", tmp);
 425                 }
 426                 else
 427                         Ne2k_int_ReadDMA(Card, page, pages-1, buf+256);
 428
 429                 // Wrap length to the packet length
 430                 if(Length > pktHdr->Length)
 431                         Length = pktHdr->Length;
 432                 else if( Length < pktHdr->Length ) {
 433                         Log_Warning("NE2000", "Packet truncated! (%i bytes truncated to %i)",
 434                                 pktHdr->Length, Length);
 435                 }
 436                 memcpy(Buffer, &buf[4], Length);
 437
 438                 free(buf);
 439         }
 440
 441         // Write BNRY (maximum page for incoming packets)
 442         if(pktHdr->NextPacketPage == RX_FIRST)
 443                 outb( Card->IOBase + BNRY, RX_LAST-1 );
 444         else
 445                 outb( Card->IOBase + BNRY, pktHdr->NextPacketPage-1 );
 446         // Set next RX Page and decrement the waiting list
 447         Card->NextRXPage = pktHdr->NextPacketPage;
 448
 449         LEAVE('i', Length);
 450         return Length;
 451 }
 452
 453 int Ne2k_int_ReadDMA(tCard *Card, int FirstPage, int NumPages, void *Buffer)
 454 {
 455          int    i;
 456
 457         // Sanity check
 458         if( !(0 <= FirstPage && FirstPage < 256) ) {
 459                 Log_Warning("NE2000", "Ne2k_int_ReadDMA: BUG - FirstPage(%i) not 8-bit", FirstPage);
 460                 return -1;
 461         }
 462         if( !(0 <= NumPages && NumPages < 256) ) {
 463                 Log_Warning("NE2000", "Ne2k_int_ReadDMA: BUG - NumPages(%i) not 8-bit", NumPages);
 464                 return -1;
 465         }
 466
 467         ENTER("pCard iFirstPage iNumPages pBuffer", Card, FirstPage, NumPages, Buffer);
 468
 469         // Make sure that the card is in bank 0
 470         outb(Card->IOBase + CMD, 0|0x22);       // Bank 0, Start, NoDMA
 471         outb(Card->IOBase + ISR, 0x40); // Clear Remote DMA Flag
 472
 473         // Set up transfer
 474         outb(Card->IOBase + RBCR0, 0);
 475         outb(Card->IOBase + RBCR1, NumPages);   // page count
 476         outb(Card->IOBase + RSAR0, 0x00);       // Page Offset
 477         outb(Card->IOBase + RSAR1, FirstPage);  // Page Number
 478         outb(Card->IOBase + CMD, 0|0x08|0x2);   // Bank 0, Remote Read, Start
 479
 480         // TODO: Less expensive
 481         //while( !(inb(Card->IOBase + ISR) & 0x40) ) {
 482         //      HALT();
 483         //      LOG("inb(ISR) = 0x%02x", inb(Card->IOBase + ISR));
 484         //}
 485         HALT(); // Small delay?
 486
 487         // Read data
 488         for(i = 0; i < 128*NumPages; i ++)
 489                 ((Uint16*)Buffer)[i] = inw(Card->IOBase + 0x10);
 490
 491
 492         outb(Card->IOBase + ISR, 0x40); // Clear Remote DMA Flag
 493
 494         LEAVE('i', NumPages);
 495         return NumPages;
 496 }
 497
 498 /**
 499  * \fn Uint8 Ne2k_int_GetWritePage(tCard *Card, Uint16 Length)
 500  */
 501 Uint8 Ne2k_int_GetWritePage(tCard *Card, Uint16 Length)
 502 {
 503         Uint8   ret = Card->NextMemPage;
 504
 505         Card->NextMemPage += (Length + 0xFF) >> 8;
 506         if(Card->NextMemPage >= TX_LAST) {
 507                 Card->NextMemPage -= TX_BUF_SIZE;
 508         }
 509
 510         return ret;
 511 }
 512
 513 /**
 514  * \fn void Ne2k_IRQHandler(int IntNum)
 515  */
 516 void Ne2k_IRQHandler(int IntNum)
 517 {
 518          int    i;
 519         Uint8   byte;
 520         for( i = 0; i < giNe2k_CardCount; i++ )
 521         {
 522                 if(gpNe2k_Cards[i].IRQ == IntNum)
 523                 {
 524                         byte = inb( gpNe2k_Cards[i].IOBase + ISR );
 525
 526                         LOG("byte = 0x%02x", byte);
 527
 528
 529                         // Reset All (save for RDMA), that's polled
 530                         outb( gpNe2k_Cards[i].IOBase + ISR, 0xFF&(~0x40) );
 531
 532                         // 0: Packet recieved (no error)
 533                         if( byte & 1 )
 534                         {
 535                                 //if( gpNe2k_Cards[i].NumWaitingPackets > MAX_PACKET_QUEUE )
 536                                 //      gpNe2k_Cards[i].NumWaitingPackets = MAX_PACKET_QUEUE;
 537                                 Semaphore_Signal( &gpNe2k_Cards[i].Semaphore, 1 );
 538                         }
 539                         // 1: Packet sent (no error)
 540                         // 2: Recieved with error
 541                         // 3: Transmission Halted (Excessive Collisions)
 542                         // 4: Recieve Buffer Exhausted
 543                         // 5:
 544                         // 6: Remote DMA Complete
 545                         // 7: Reset
 546
 547                         return ;
 548                 }
 549         }
 550         Log_Warning("Ne2k", "Recieved Unknown IRQ %i", IntNum);
 551 }