diff --git a/client/carts/kipperkart.s b/client/carts/kipperkart.s
index 8995ab9..47f955f 100644
--- a/client/carts/kipperkart.s
+++ b/client/carts/kipperkart.s
@@ -69,7 +69,7 @@
   .import dns_server_msg
   .import tftp_server_msg
   .import press_a_key_to_continue
-  
+  .import cfg_default_drive
   .import print_a
   .import print_cr
   .import print
@@ -416,19 +416,13 @@ cmp #KEYCODE_F7
 
 cmp #'+'
   bne @not_plus
-  inc io_device_no
-  bpl :+
-  dec io_device_no
-:  
+  inc cfg_default_drive
   jmp @config_menu
 @not_plus:
 
 cmp #'-'
   bne @not_minus
-  dec io_device_no
-  bpl :+
-  inc io_device_no
-:
+  dec cfg_default_drive
   jmp @config_menu
   
 @not_minus:
@@ -576,9 +570,11 @@ disk_boot:
   .import io_filename
   .import io_read_file
   .import io_load_address
-  lda #00 ;use default drive
-  sta io_device_no
 
+  lda cfg_default_drive
+  sec
+  sbc #7
+  sta io_device_no
   ldax #directory_buffer
   jsr io_read_catalogue
   
@@ -738,9 +734,7 @@ exit_ping:
 print_default_drive:
   ldax #default_drive
 	jsr print_ascii_as_native
-  lda io_device_no
-  clc
-  adc #08
+  lda cfg_default_drive
   jsr print_hex
   jmp print_cr
   
diff --git a/client/carts/set_ip_config.rb b/client/carts/set_ip_config.rb
index 425d5bd..fa1b748 100644
--- a/client/carts/set_ip_config.rb
+++ b/client/carts/set_ip_config.rb
@@ -4,8 +4,9 @@
 #	$22=netmask (4 bytes)
 #	$26=gateway (4 bytes)
 #	$2A=DNS (4 bytes)
-#	$2E=TFTP server (4 bytes)
-
+#	$2E= DHCP server (4 bytes) (not changeable)
+#	$32=TFTP server (4 bytes)
+#   $36=drive (1 byte)
 
 @cartridge_offsets={
 #symobol => offset, length
@@ -14,7 +15,8 @@
   :netmask=>[0x22,4],
   :gateway=>[0x26,4],
   :dns=>[0x2a,4],
-  :tftp=>[0x2e,4],
+  :tftp=>[0x32,4],
+  :drive=>[0x36,1]
  } 
  
  @progname=File.basename($0)
@@ -79,6 +81,8 @@ end
       end
     end
     packed_option=mac.pack("cccccc")
+  elsif option_length==1 then #it must be drive letter
+    packed_option=[value.to_i].pack("c")
   else #it must be an IP
     split_values=value.split(".")
     if (split_values.length!=4) || (split_values[3].nil?) then
diff --git a/client/cfg/c64_16kcart.cfg b/client/cfg/c64_16kcart.cfg
index 9262fc4..352bace 100644
--- a/client/cfg/c64_16kcart.cfg
+++ b/client/cfg/c64_16kcart.cfg
@@ -4,8 +4,8 @@ MEMORY {
     ZP: start = $02, size = $1A, type = rw ;
     IP65ZP: start = $20, size = $13, type = rw, define = yes; #this cart replaces BASIC so ok to use that space
     HEADER: start = $8000, size = $18, file = %O;
-    DEFAULTS: start = $8018, size = $1E, file = %O;
-    ROM: start = $8036, size = $3FCA, define = yes, file = %O;
+    DEFAULTS: start = $8018, size = $1F, file = %O;
+    ROM: start = $8037, size = $3FC9, define = yes, file = %O;
     RAM: start = $C010, size = $0fE0, define = yes;
     RAM2: start = $0334, size = $CB, define = yes;  #extra scratch area - Tape I/O buffer
     RAM3: start = $0200, size = $58, define = yes;  #extra scratch area - Tape I/O buffer
diff --git a/client/cfg/c64_8kcart.cfg b/client/cfg/c64_8kcart.cfg
index 30a123c..cd85017 100644
--- a/client/cfg/c64_8kcart.cfg
+++ b/client/cfg/c64_8kcart.cfg
@@ -4,8 +4,8 @@
 MEMORY {
     IP65ZP: start = $A3, size = $0E, type = rw, define = yes;
     HEADER: start = $8000, size = $09, file = %O;
-    DEFAULTS: start = $8009, size = $1E, file = %O;
-    ROM: start = $8027, size = $1FCA, define = yes, file = %O;
+    DEFAULTS: start = $8009, size = $1F, file = %O;
+    ROM: start = $8028, size = $1FC9, define = yes, file = %O;
     RAM: start = $C010, size = $0fE0, define = yes;
 
   
diff --git a/client/ip65/config.s b/client/ip65/config.s
index 138911e..fca33f5 100644
--- a/client/ip65/config.s
+++ b/client/ip65/config.s
@@ -11,6 +11,7 @@
   .export cfg_tftp_server
   .export cfg_get_configuration_ptr
   .export cfg_init
+  .export cfg_default_drive
   .export dhcp_server 
   .import copymem
   .importzp copy_src
@@ -50,6 +51,7 @@ cfg_gateway_default:	.byte 192, 168, 1, 1 ;ip address of router on local network
 cfg_dns_default:	.byte 0, 0, 0, 0; ip address of dns server to use (will be overwritten if dhcp_init is called)
 dhcp_server_default: .res 4   ;will be set address of dhcp server that configuration was obtained from
 cfg_tftp_server_default: .byte $ff,$ff,$ff,$ff ; ip address of server to send tftp requests to (can be a broadcast address)
+cfg_default_drive_default: .byte 8
 cfg_end_defaults:
 cfg_size=cfg_end_defaults-cfg_mac_default+1
 
@@ -63,6 +65,7 @@ cfg_gateway:	.res 4 ;ip address of router on local network (will be overwritten
 cfg_dns:	.res 4; ip address of dns server to use (will be overwritten if dhcp_init is called)
 dhcp_server: .res 4   ;will be set address of dhcp server that configuration was obtained from
 cfg_tftp_server: .res 4 ; ip address of server to send tftp requests to (can be a broadcast address)
+cfg_default_drive: .res 0