diff --git a/drivers/isdn/sc/shmem.c b/drivers/isdn/sc/shmem.c
new file mode 100644
index 0000000..7bc2dfa
--- /dev/null
+++ b/drivers/isdn/sc/shmem.c
@@ -0,0 +1,143 @@
+/* $Id: shmem.c,v 1.2.10.1 2001/09/23 22:24:59 kai Exp $
+ *
+ * Copyright (C) 1996  SpellCaster Telecommunications Inc.
+ *
+ * Card functions implementing ISDN4Linux functionality
+ *
+ * This software may be used and distributed according to the terms
+ * of the GNU General Public License, incorporated herein by reference.
+ *
+ * For more information, please contact gpl-info@spellcast.com or write:
+ *
+ *     SpellCaster Telecommunications Inc.
+ *     5621 Finch Avenue East, Unit #3
+ *     Scarborough, Ontario  Canada
+ *     M1B 2T9
+ *     +1 (416) 297-8565
+ *     +1 (416) 297-6433 Facsimile
+ */
+
+#include "includes.h"		/* This must be first */
+#include "hardware.h"
+#include "card.h"
+
+/*
+ * Main adapter array
+ */
+extern board *sc_adapter[];
+extern int cinst;
+
+/*
+ *
+ */
+void memcpy_toshmem(int card, void *dest, const void *src, size_t n)
+{
+	unsigned long flags;
+	unsigned char ch;
+
+	if(!IS_VALID_CARD(card)) {
+		pr_debug("Invalid param: %d is not a valid card id\n", card);
+		return;
+	}
+
+	if(n > SRAM_PAGESIZE) {
+		return;
+	}
+
+	/*
+	 * determine the page to load from the address
+	 */
+	ch = (unsigned long) dest / SRAM_PAGESIZE;
+	pr_debug("%s: loaded page %d\n", sc_adapter[card]->devicename,ch);
+	/*
+	 * Block interrupts and load the page
+	 */
+	spin_lock_irqsave(&sc_adapter[card]->lock, flags);
+
+	outb(((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80,
+		sc_adapter[card]->ioport[sc_adapter[card]->shmem_pgport]);
+	memcpy_toio(sc_adapter[card]->rambase +
+		((unsigned long) dest % 0x4000), src, n);
+	spin_unlock_irqrestore(&sc_adapter[card]->lock, flags);
+	pr_debug("%s: set page to %#x\n",sc_adapter[card]->devicename,
+		((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE)>>14)|0x80);
+	pr_debug("%s: copying %d bytes from %#x to %#x\n",
+		sc_adapter[card]->devicename, n,
+		(unsigned long) src,
+		sc_adapter[card]->rambase + ((unsigned long) dest %0x4000));
+}
+
+/*
+ * Reverse of above
+ */
+void memcpy_fromshmem(int card, void *dest, const void *src, size_t n)
+{
+	unsigned long flags;
+	unsigned char ch;
+
+	if(!IS_VALID_CARD(card)) {
+		pr_debug("Invalid param: %d is not a valid card id\n", card);
+		return;
+	}
+
+	if(n > SRAM_PAGESIZE) {
+		return;
+	}
+
+	/*
+	 * determine the page to load from the address
+	 */
+	ch = (unsigned long) src / SRAM_PAGESIZE;
+	pr_debug("%s: loaded page %d\n", sc_adapter[card]->devicename,ch);
+	
+	
+	/*
+	 * Block interrupts and load the page
+	 */
+	spin_lock_irqsave(&sc_adapter[card]->lock, flags);
+
+	outb(((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80,
+		sc_adapter[card]->ioport[sc_adapter[card]->shmem_pgport]);
+	memcpy_fromio(dest,(void *)(sc_adapter[card]->rambase +
+		((unsigned long) src % 0x4000)), n);
+	spin_unlock_irqrestore(&sc_adapter[card]->lock, flags);
+	pr_debug("%s: set page to %#x\n",sc_adapter[card]->devicename,
+		((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE)>>14)|0x80);
+/*	pr_debug("%s: copying %d bytes from %#x to %#x\n",
+		sc_adapter[card]->devicename, n,
+		sc_adapter[card]->rambase + ((unsigned long) src %0x4000), (unsigned long) dest); */
+}
+
+void memset_shmem(int card, void *dest, int c, size_t n)
+{
+	unsigned long flags;
+	unsigned char ch;
+
+	if(!IS_VALID_CARD(card)) {
+		pr_debug("Invalid param: %d is not a valid card id\n", card);
+		return;
+	}
+
+	if(n > SRAM_PAGESIZE) {
+		return;
+	}
+
+	/*
+	 * determine the page to load from the address
+	 */
+	ch = (unsigned long) dest / SRAM_PAGESIZE;
+	pr_debug("%s: loaded page %d\n",sc_adapter[card]->devicename,ch);
+
+	/*
+	 * Block interrupts and load the page
+	 */
+	spin_lock_irqsave(&sc_adapter[card]->lock, flags);
+
+	outb(((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80,
+		sc_adapter[card]->ioport[sc_adapter[card]->shmem_pgport]);
+	memset_io(sc_adapter[card]->rambase +
+		((unsigned long) dest % 0x4000), c, n);
+	pr_debug("%s: set page to %#x\n",sc_adapter[card]->devicename,
+		((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE)>>14)|0x80);
+	spin_unlock_irqrestore(&sc_adapter[card]->lock, flags);
+}