diff --git a/firmware/FIRMWARE.ZX3 b/firmware/FIRMWARE.ZX3
index 64300a5..e35fbfb 100644
Binary files a/firmware/FIRMWARE.ZX3 and b/firmware/FIRMWARE.ZX3 differ
diff --git a/firmware/firmware.asm b/firmware/firmware.asm
index 2832f0e..8711d34 100644
--- a/firmware/firmware.asm
+++ b/firmware/firmware.asm
@@ -2130,13 +2130,17 @@ upgr34  ld      (hl), a
         ld      a, ixl
         rra
         jr      nz, upgr35
-    IF  version=1
+    IF  version<3
+      IF  version=1
         cp      45+5
-    ELSE
-      IF  version=2
-        cp      69+5
       ELSE
-        cp      56+5
+        cp      68+5
+      ENDIF
+    ELSE
+      IF  version=3
+        cp      55+5
+      ELSE
+        cp      27+5
       ENDIF
     ENDIF
         jr      z, upgr35
diff --git a/firmware/strings.asm b/firmware/strings.asm
index c6e0668..1245e40 100644
--- a/firmware/strings.asm
+++ b/firmware/strings.asm
@@ -5,7 +5,7 @@ cad1    defb    'http://zxuno.speccy.org', 0
 cad1    defb    'http://zxdos.forofpga.es', 0
       ENDIF
         defb    'ZX-Uno BIOS v0.86', 0
-        defb    'Copyleft ', 127, ' 2022 ZX-Uno Team', 0
+        defb    'Copyleft ', 127, ' 2023 ZX-Uno Team', 0
         defb    'Processor: Z80 3.5MHz', 0
         defb    'Memory:    '
 cadmem  defb    '512K Ok', 0
@@ -41,7 +41,7 @@ cad8    defb    $10, '                         ', $10, '              ', $10, 0
 cad9    defb    $14, $11, $11, $11, $11, $11, $11, $11, $11, $11, $11, $11, $11, $11
         defb    $11, $11, $11, $11, $11, $11, $11, $11, $11, $11, $11, $11, $18, $11
         defb    $11, $11, $11, $11, $11, $11, $11, $11, $11, $11, $11, $11, $11, $15, 0
-        defb    '   BIOS v0.86    ', $7f, '2022 ZX-Uno Team', 0
+        defb    '   BIOS v0.86    ', $7f, '2023 ZX-Uno Team', 0
       ELSE
         defb    'Press <Edit> to Setup',0
         defb    '      <Break> Boot Menu', 0
@@ -72,7 +72,7 @@ cad8    defb    $10, '                              ', $10, 0
 cad9    defb    $14, $11, $11, $11, $11, $11, $11, $11, $11, $11, $11, $11, $11, $11
         defb    $11, $11, $11, $11
         defb    $11, $11, $11, $11, $11, $11, $11, $11, $11, $11, $11, $11, $11, $15, 0
-        defb    ' BIOS v0.86 ', $7f, '2022 ZX1 Team', 0
+        defb    ' BIOS v0.86 ', $7f, '2023 ZX1 Team', 0
         defs    $66
       ENDIF
 cad10   defb    'Hardware tests', 0