diff -ur linux-2.2.19-ori/drivers/char/serial.c linux-2.2.19/drivers/char/serial.c
--- linux-2.2.19-ori/drivers/char/serial.c	Mon Aug  6 12:06:13 2001
+++ linux-2.2.19/drivers/char/serial.c	Thu Feb  7 12:07:13 2002
@@ -54,6 +54,9 @@
  *  7/00: fix some returns on failure not using MOD_DEC_USE_COUNT.
  *	  Arnaldo Carvalho de Melo <acme@conectiva.com.br>
  *
+ *  2/02: Support for the Decision PCCOM 4 ports added.
+ *	  Luca Montecchiani <l.montecchiani@teamsystem.com>
+ *
  * This module exports the following rs232 io functions:
  *
  *	int rs_init(void);
@@ -4569,10 +4572,15 @@
 		SPCI_FL_BASE0, 1, 520833,
 		64, 3, NULL, 0x300 },
 #endif
+	{	PCI_VENDOR_ID_DCI, PCI_DEVICE_ID_DCI_PCCOM4,
+		PCI_ANY_ID, PCI_ANY_ID,
+		SPCI_FL_BASE3, 4, 115200,
+		8 },
 	{	PCI_VENDOR_ID_DCI, PCI_DEVICE_ID_DCI_PCCOM8,
 		PCI_ANY_ID, PCI_ANY_ID,
 		SPCI_FL_BASE3, 8, 115200,
-		8 },		
+		8 },
 	/* Generic serial board */
 	{	0, 0,
 		0, 0,
diff -ur linux-2.2.19-ori/drivers/char/serial_compat.h linux-2.2.19/drivers/char/serial_compat.h
--- linux-2.2.19-ori/drivers/char/serial_compat.h	Mon Aug  6 12:06:13 2001
+++ linux-2.2.19/drivers/char/serial_compat.h	Thu Feb  7 11:39:41 2002
@@ -476,6 +476,10 @@
 #define PCI_DEVICE_ID_RASTEL_2PORT	0x2000
 #endif
 
+#ifndef PCI_DEVICE_ID_DCI_PCCOM4
+#define PCI_DEVICE_ID_DCI_PCCOM4 0x0001
+#endif
+
 #ifndef PCI_DEVICE_ID_DCI_PCCOM8
 #define PCI_DEVICE_ID_DCI_PCCOM8 0x0002
 #endif