diff --git a/inc/ip65.h b/inc/ip65.h
index d389376..0760af2 100644
--- a/inc/ip65.h
+++ b/inc/ip65.h
@@ -23,30 +23,6 @@
 //
 extern uint8_t ip65_error;
 
-// MAC address of local machine (will be overwritten if ip65_init is called)
-//
-extern uint8_t cfg_mac[6];
-
-// IP address of local machine (will be overwritten if dhcp_init is called)
-//
-extern uint32_t cfg_ip;
-
-// Netmask of local network (will be overwritten if dhcp_init is called)
-//
-extern uint32_t cfg_netmask;
-
-// IP address of router on local network (will be overwritten if dhcp_init is called)
-//
-extern uint32_t cfg_gateway;
-
-// IP address of dns server to use (will be overwritten if dhcp_init is called)
-//
-extern uint32_t cfg_dns;
-
-// Will be set to address of DHCP server that configuration was obtained from
-//
-extern uint32_t dhcp_server;
-
 // Driver initialization parameter values
 //
 #ifdef __APPLE2__
@@ -67,6 +43,14 @@ extern uint32_t dhcp_server;
 //
 bool __fastcall__ ip65_init(uint8_t drv_init);
 
+// Access to Ethernet configuration
+//
+// Access to the three items below is only valid after ip65_init returned false.
+//
+extern uint8_t  cfg_mac[6];         // MAC address of local machine
+extern char     eth_driver_name[];  // Zero terminated string containing driver name
+extern uint8_t* eth_driver_io_base; // Ethernet chip I/O base address used by driver
+
 // Main IP polling loop
 //
 // This routine should be periodically called by an application at any time
@@ -120,6 +104,16 @@ uint32_t __fastcall__ parse_dotted_quad(char* quad);
 //
 bool dhcp_init(void);
 
+// Access to IP configuration
+//
+// The five items below will be overwritten if dhcp_init is called.
+//
+extern uint32_t cfg_ip;         // IP address of local machine
+extern uint32_t cfg_netmask;    // Netmask of local network
+extern uint32_t cfg_gateway;    // IP address of router on local network
+extern uint32_t cfg_dns;        // IP address of DNS server to use
+extern uint32_t dhcp_server;    // Address of DHCP server that config was obtained from
+
 // Resolve a string containing a hostname (or a dotted quad) to an IP address
 //
 // Inputs: hostname: Zero terminated string containing either a DNS hostname
diff --git a/ip65/Makefile b/ip65/Makefile
index 24d77b3..8e146dd 100644
--- a/ip65/Makefile
+++ b/ip65/Makefile
@@ -23,6 +23,7 @@ IP65OBJS=\
 	dottedquad_c.o \
 	download.o \
 	download_c.o \
+	driver_c.o \
 	eth.o \
 	http.o \
 	http_c.o \
diff --git a/ip65/driver_c.s b/ip65/driver_c.s
new file mode 100644
index 0000000..718fe71
--- /dev/null
+++ b/ip65/driver_c.s
@@ -0,0 +1,11 @@
+.include "../inc/common.inc"
+
+.export _eth_driver_name
+.export _eth_driver_io_base
+
+.import eth_driver_name
+.import eth_driver_io_base
+
+_eth_driver_name := eth_driver_name
+
+_eth_driver_io_base := eth_driver_io_base