diff -urN linux-2.4.19-pre1/Documentation/Configure.help linux/Documentation/Configure.help
--- linux-2.4.19-pre1/Documentation/Configure.help	Mon Feb 25 18:15:45 2002
+++ linux/Documentation/Configure.help	Wed Feb 27 19:56:12 2002
@@ -10265,6 +10265,12 @@
   instead of an internal one.  Disabling this option will save some
   memory by making the code size smaller.  If unsure, say Y.
 
+Support for Dreamcast Broad Band Adaptor
+CONFIG_8139TOO_DREAMCAST
+  This enables support for the SEGA Broad Band Adaptor for Dreamcast.
+  It uses 16KB buffer and doesn't support mapping main memory to DMA.
+  If unsure, say N.
+ 
 SiS 900/7016 PCI Fast Ethernet Adapter support
 CONFIG_SIS900
   This is a driver for the Fast Ethernet PCI network cards based on
diff -urN linux-2.4.19-pre1/drivers/net/8139too.c linux/drivers/net/8139too.c
--- linux-2.4.19-pre1/drivers/net/8139too.c	Mon Feb 25 18:15:00 2002
+++ linux/drivers/net/8139too.c	Wed Feb 27 19:59:31 2002
@@ -109,9 +109,17 @@
 #include <linux/ethtool.h>
 #include <linux/mii.h>
 #include <linux/completion.h>
+
 #include <asm/io.h>
 #include <asm/uaccess.h>
 
+#ifdef CONFIG_8139TOO_DREAMCAST
+#define CONFIG_8139TOO_BUF16K	1
+#define USE_NO_DMAMAP		1
+#else
+#define USE_NO_DMAMAP		0
+#endif
+
 #define RTL8139_DRIVER_NAME   DRV_NAME " Fast Ethernet driver " DRV_VERSION
 #define PFX DRV_NAME ": "
 
@@ -163,7 +171,11 @@
 static int debug = -1;
 
 /* Size of the in-memory receive ring. */
+#ifdef CONFIG_8139TOO_BUF16K
+#define RX_BUF_LEN_IDX	1	/* 0==8K, 1==16K, 2==32K, 3==64K */
+#else
 #define RX_BUF_LEN_IDX	2	/* 0==8K, 1==16K, 2==32K, 3==64K */
+#endif
 #define RX_BUF_LEN	(8192 << RX_BUF_LEN_IDX)
 #define RX_BUF_PAD	16
 #define RX_BUF_WRAP_PAD 2048 /* spare padding to handle lack of packet wrap */
@@ -217,6 +229,7 @@
 	DFE690TXD,
 	FE2000VX,
 	ALLIED8139,
+	SEGABBA,
 	RTL8129,
 } board_t;
 
@@ -236,6 +249,7 @@
 	{ "D-Link DFE-690TXD (RealTek RTL8139)", RTL8139_CAPS },
 	{ "AboCom FE2000VX (RealTek RTL8139)", RTL8139_CAPS },
 	{ "Allied Telesyn 8139 CardBus", RTL8139_CAPS },
+	{ "SEGA Broadband Adapter", RTL8139_CAPS },
 	{ "RealTek RTL8129", RTL8129_CAPS },
 };
 
@@ -251,6 +265,7 @@
 	{0x1186, 0x1340, PCI_ANY_ID, PCI_ANY_ID, 0, 0, DFE690TXD },
 	{0x13d1, 0xab06, PCI_ANY_ID, PCI_ANY_ID, 0, 0, FE2000VX },
 	{0x1259, 0xa117, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ALLIED8139 },
+	{0x11db, 0x1234, PCI_ANY_ID, PCI_ANY_ID, 0, 0, SEGABBA },
 
 #ifdef CONFIG_8139TOO_8129
 	{0x10ec, 0x8129, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8129 },
@@ -664,10 +679,17 @@
 	PCIErr | PCSTimeout | RxUnderrun | RxOverflow | RxFIFOOver |
 	TxErr | TxOK | RxErr | RxOK;
 
+#ifdef CONFIG_8139TOO_BUF16K 
+static const unsigned int rtl8139_rx_config =
+	RxCfgRcv16K | RxNoWrap |
+	(RX_FIFO_THRESH << RxCfgFIFOShift) |
+	(RX_DMA_BURST << RxCfgDMAShift);
+#else
 static const unsigned int rtl8139_rx_config =
 	RxCfgRcv32K | RxNoWrap |
 	(RX_FIFO_THRESH << RxCfgFIFOShift) |
 	(RX_DMA_BURST << RxCfgDMAShift);
+#endif
 
 static const unsigned int rtl8139_tx_config =
 	(TX_DMA_BURST << TxDMAShift) | (TX_RETRY << TxRetryShift);
@@ -1348,8 +1370,9 @@
 
 	tp->rx_config = rtl8139_rx_config | AcceptBroadcast | AcceptMyPhys;
 	RTL_W32 (RxConfig, tp->rx_config);
+	
 
-	/* Check this value: the documentation for IFG contradicts ifself. */
+	/* Check this value: the documentation for IFG contradicts itself. */
 	RTL_W32 (TxConfig, rtl8139_tx_config);
 
 	tp->cur_rx = 0;
@@ -1666,7 +1689,7 @@
 	/* Note: the chip doesn't have auto-pad! */
 	spin_lock_irq(&tp->lock);
 	RTL_W32_F (TxStatus0 + (entry * sizeof (u32)),
-		   tp->tx_flag | max(len, (unsigned int)ETH_ZLEN));
+		   tp->tx_flag | max(len, (unsigned int) ETH_ZLEN));
 
 	dev->trans_start = jiffies;
 
diff -urN linux-2.4.19-pre1/drivers/net/Config.in linux/drivers/net/Config.in
--- linux-2.4.19-pre1/drivers/net/Config.in	Mon Feb 25 18:14:58 2002
+++ linux/drivers/net/Config.in	Wed Feb 27 20:00:14 2002
@@ -185,6 +185,7 @@
       dep_mbool '      Use PIO instead of MMIO' CONFIG_8139TOO_PIO $CONFIG_8139TOO
       dep_mbool '      Support for automatic channel equalization (EXPERIMENTAL)' CONFIG_8139TOO_TUNE_TWISTER $CONFIG_8139TOO $CONFIG_EXPERIMENTAL
       dep_mbool '      Support for older RTL-8129/8130 boards' CONFIG_8139TOO_8129 $CONFIG_8139TOO
+      dep_mbool '      Support for Dreamcast Broad Band Adaptor' CONFIG_8139TOO_DREAMCAST $CONFIG_8139TOO
       dep_mbool '      Experiment for better RX reset (EXPERIMENTAL)' CONFIG_8139_NEW_RX_RESET $CONFIG_8139TOO $CONFIG_EXPERIMENTAL
       dep_tristate '    SiS 900/7016 PCI Fast Ethernet Adapter support' CONFIG_SIS900 $CONFIG_PCI
       dep_tristate '    SMC EtherPower II' CONFIG_EPIC100 $CONFIG_PCI