diff --git a/firmware/FIRMWARE.ZX2 b/firmware/FIRMWARE.ZX2
index 322757d..751c319 100644
Binary files a/firmware/FIRMWARE.ZX2 and b/firmware/FIRMWARE.ZX2 differ
diff --git a/firmware/FIRMWARE.ZX3 b/firmware/FIRMWARE.ZX3
index 2282fba..d151cbc 100644
Binary files a/firmware/FIRMWARE.ZX3 and b/firmware/FIRMWARE.ZX3 differ
diff --git a/firmware/FIRMWARE.ZXD b/firmware/FIRMWARE.ZXD
index e1d5fe5..e1284b3 100644
Binary files a/firmware/FIRMWARE.ZXD and b/firmware/FIRMWARE.ZXD differ
diff --git a/firmware/firmware.asm b/firmware/firmware.asm
index 605f8ad..5498e83 100644
--- a/firmware/firmware.asm
+++ b/firmware/firmware.asm
@@ -4229,7 +4229,7 @@ wrfls2  call    waits5
         wreg    flash_cs, 0     ; activamos spi, enviando un 0
       IF  version>1
         wreg    flash_spi, $12  ; envío page program
-        ld      hl, (highb)
+        ld      hl, (alto highb)
         out     (c), h
       ELSE
         wreg    flash_spi, 2    ; envío page program
@@ -4465,10 +4465,15 @@ finav
 finlog  incbin  strings.bin.zx7b
       ELSE
         incbin  bezel.rcs.zx7b
+finbez
         IF version=1
-finbez    incbin  logo192x256.rcs.zx7b
+          incbin  logo192x256.rcs.zx7b
         ELSE
-finbez    incbin  logo192x256d.rcs.zx7b
+          IF version=2
+            incbin  logo192x256d.rcs.zx7b
+          ELSE
+            incbin  logo192x256dp.rcs.zx7b
+          ENDIF
         ENDIF
 finlog  incbin  strings.bin.zx7b
       ENDIF
@@ -4879,15 +4884,21 @@ sloti   ld      l, a
        ELSE
         and     $3f
         ld      h, d
-        ld      l, a
         cp      41
         jr      c, slot2b
         sub     41
+        ld      l, a
         ld      e, d
        ENDIF
       ENDIF
     ENDIF
-slot2b  add     hl, de          ; $00c0 y 2f80
+slot2b  
+      IF version=2 OR version=3
+        sbc     a, a
+        inc     a
+        ld      (alto highb+1), a
+      ENDIF
+        add     hl, de          ; $00c0 y 2f80
         add     hl, hl
         add     hl, hl
 slot2c  add     hl, hl
diff --git a/firmware/strings.asm b/firmware/strings.asm
index 8548c4c..9ddb651 100644
--- a/firmware/strings.asm
+++ b/firmware/strings.asm
@@ -4,7 +4,7 @@ cad1    defb    'http://zxuno.speccy.org', 0
       ELSE
 cad1    defb    'http://zxdos.forofpga.es', 0
       ENDIF
-        defb    'ZX-Uno BIOS v0.82', 0
+        defb    'ZX-Uno BIOS v0.83', 0
         defb    'Copyleft ', 127, ' 2020 ZX-Uno Team', 0
         defb    'Processor: Z80 3.5MHz', 0
         defb    'Memory:    '
@@ -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 v0.82    ', $7f, '2020 ZX-Uno Team', 0
+        defb    '   BIOS v0.83    ', $7f, '2020 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 v0.82 ', $7f, '2020 ZX1 Team', 0
+        defb    ' BIOS v0.83 ', $7f, '2020 ZX1 Team', 0
         defs    $66
       ENDIF
 cad10   defb    'Hardware tests', 0