diff --git a/fpga/rtl/memcontrol.sv b/fpga/rtl/memcontrol.sv
index 2f76506..e84b6af 100644
--- a/fpga/rtl/memcontrol.sv
+++ b/fpga/rtl/memcontrol.sv
@@ -78,23 +78,24 @@ always @(posedge clk28) begin
         {2'b11, bus.a[14], bus.a[15], bus.a[14], bus.a[13]} ;
 end
 
-reg [16:14] rom_a;
+reg [16:13] rom_a;
 always @(posedge clk28) begin
     rom_a <=
-        magic_map? 3'd2 :
-        div_map? 3'd3 :
-        (machine == MACHINE_S3 && port_1ffd[2] == 1'b0 && rompage128 == 1'b0)? 3'd4 :
-        (machine == MACHINE_S3 && port_1ffd[2] == 1'b0 && rompage128 == 1'b1)? 3'd5 :
-        (machine == MACHINE_S3 && port_1ffd[2] == 1'b1 && rompage128 == 1'b0)? 3'd6 :
-        (rompage128 == 1'b1)? 3'd1 :
-        3'd0;
+        magic_map? {3'd2, 1'b0} :
+        div_map? {3'd2, 1'b1} :
+        (machine == MACHINE_S3 && port_1ffd[2] == 1'b0 && rompage128 == 1'b0)? {3'd4, bus.a[13]} :
+        (machine == MACHINE_S3 && port_1ffd[2] == 1'b0 && rompage128 == 1'b1)? {3'd5, bus.a[13]} :
+        (machine == MACHINE_S3 && port_1ffd[2] == 1'b1 && rompage128 == 1'b0)? {3'd6, bus.a[13]} :
+        (machine == MACHINE_S48)? {3'd3, bus.a[13]} :
+        (rompage128 == 1'b1)? {3'd1, bus.a[13]} :
+        {3'd0, bus.a[13]};
 end
 
 assign va[18:0] =
     rom2ram_ram_wren? {2'b00, rom2ram_ram_address} :
     screen_fetch && snow? {3'b111, screenpage, screen_addr[14:8], {8{1'bz}}} :
     screen_fetch? {3'b111, screenpage, screen_addr} :
-    romreq? {2'b00, rom_a[16:14], bus.a[13], {13{1'bz}}} :
+    romreq? {2'b00, rom_a[16:13], {13{1'bz}}} :
     {ram_a[18:13], {13{1'bz}}};
 
 assign vd[7:0] =
diff --git a/rom/48.rom b/rom/48.rom
new file mode 100644
index 0000000..4d6895e
Binary files /dev/null and b/rom/48.rom differ
diff --git a/rom/Makefile b/rom/Makefile
index b3e382d..ab4d85f 100644
--- a/rom/Makefile
+++ b/rom/Makefile
@@ -1,12 +1,12 @@
 # Each bank = 16Kb
-bank00=128-0.rom              # 0x00000
-bank01=128-1.rom              # 0x04000
-bank02=../rom_src/main.bin    # 0x08000
-bank03=ESXMMC.BIN ESXMMC.BIN  # 0x0C000
-bank04=zcen3e0.rom            # 0x10000
-bank05=zcen3e1.rom            # 0x14000
-bank06=zcen3e2.rom            # 0x18000
-bank07=zero8k.bin zero8k.bin  # 0x1C000
+bank00=128-0.rom                      # 0x00000
+bank01=128-1.rom                      # 0x04000
+bank02=../rom_src/main.bin ESXMMC.BIN # 0x08000
+bank03=48.rom                         # 0x0C000
+bank04=zcen3e0.rom                    # 0x10000
+bank05=zcen3e1.rom                    # 0x14000
+bank06=zcen3e2.rom                    # 0x18000
+bank07=zero8k.bin zero8k.bin          # 0x1C000
 
 sizif.rom: ${bank00} ${bank01} ${bank02} ${bank03} ${bank04} ${bank05} ${bank06} ${bank07}
 
diff --git a/rom_src/main.asm b/rom_src/main.asm
index 24f8669..ca67cc7 100644
--- a/rom_src/main.asm
+++ b/rom_src/main.asm
@@ -497,12 +497,12 @@ wait_for_keys_release:
     include font.asm
     include strings.asm
 
-    DISPLAY "Free space: ",/D,#3FE8-$
-    ASSERT $ < #3FE8
+    DISPLAY "Free space: ",/D,#1FE8-$
+    ASSERT $ < #1FE8
 
 
 ; Just some string at the end of ROM
-    ORG #3FE8
+    ORG #1FE8
     DB 0,"End of Sizif Magic ROM",0
 
 ; Variables
@@ -526,4 +526,4 @@ Ulaplus_pallete:
 
 
     CSPECTMAP "main.map"
-    SAVEBIN "main.bin",0,16384
+    SAVEBIN "main.bin",0,8192