diff --git a/Binary/AppleIISd.bin b/Binary/AppleIISd.bin
index 1147b31..117991d 100644
Binary files a/Binary/AppleIISd.bin and b/Binary/AppleIISd.bin differ
diff --git a/Binary/Flasher.dsk b/Binary/Flasher.dsk
index 10593d7..59866dd 100644
Binary files a/Binary/Flasher.dsk and b/Binary/Flasher.dsk differ
diff --git a/Firmware/src/AppleIISd.inc b/Firmware/src/AppleIISd.inc
index 312681f..ce2f3b7 100644
--- a/Firmware/src/AppleIISd.inc
+++ b/Firmware/src/AppleIISd.inc
@@ -1,7 +1,7 @@
 ;*******************************
 ;
 ; Apple][Sd Firmware
-; Version 1.2.2
+; Version 1.2.3
 ; Defines
 ;
 ; (c) Florian Reitz, 2017 - 2021
diff --git a/Firmware/src/AppleIISd.s b/Firmware/src/AppleIISd.s
index 72e936b..426107f 100644
--- a/Firmware/src/AppleIISd.s
+++ b/Firmware/src/AppleIISd.s
@@ -1,7 +1,7 @@
 ;*******************************
 ;
 ; Apple][Sd Firmware
-; Version 1.2.2
+; Version 1.2.3
 ; Main source
 ;
 ; (c) Florian Reitz, 2017 - 2021
@@ -86,7 +86,7 @@
             LDA   #197      
             JSR   $FCA8       ; wait for 100 ms
 
-@OAPPLE:    BIT   OAPPLE      ; check for OA key
+@OAPPLE:    LDA   OAPPLE      ; check for OA key
             BPL   @INIT       ; and skip boot if pressed
 
 @NEXTSLOT:  LDA   CURSLOT     ; skip boot when no card
diff --git a/Firmware/src/Helper.s b/Firmware/src/Helper.s
index 6218e35..f836917 100644
--- a/Firmware/src/Helper.s
+++ b/Firmware/src/Helper.s
@@ -1,7 +1,7 @@
 ;*******************************
 ;
 ; Apple][Sd Firmware
-; Version 1.2.2
+; Version 1.2.3
 ; Helper functions
 ;
 ; (c) Florian Reitz, 2017 - 2021
@@ -36,7 +36,7 @@ SDCMD:      PHY
             LDY   #0
 @LOOP:      LDA   (CMDLO),Y
             STA   DATA,X
-@WAIT:      BIT   CTRL,X      ; TC is in N
+@WAIT:      LDA   CTRL,X      ; TC is in N
             BPL   @WAIT
             INY
             CPY   #6
@@ -54,7 +54,7 @@ SDCMD:      PHY
 
 GETR1:      LDA   #DUMMY
             STA   DATA,X
-@WAIT:      BIT   CTRL,X
+@WAIT:      LDA   CTRL,X
             BPL   @WAIT
             LDA   DATA,X      ; get response
             BMI   GETR1       ; wait for MSB=0
@@ -79,7 +79,7 @@ GETR3:      JSR   GETR1       ; get R1 first
             JMP   @WAIT       ; first byte is already there 
 @LOOP:      LDA   #DUMMY      ; send dummy
             STA   DATA,X
-@WAIT:      BIT   CTRL,X
+@WAIT:      LDA   CTRL,X
             BPL   @WAIT
             LDA   DATA,X
             PHA
@@ -128,7 +128,7 @@ GETBLOCK:   PHX               ; save X
             LDA   #2          ; it is a phantom slot
             STA   R31,X
 
-@DRIVE:     BIT   DSNUMBER    ; drive number
+@DRIVE:     LDA   DSNUMBER    ; drive number
             BPL   @SDHC       ; D1
             LDA   R31,X       ; D2
             INC   A
diff --git a/Firmware/src/ProDOS.s b/Firmware/src/ProDOS.s
index 48deed8..8a2e4b7 100644
--- a/Firmware/src/ProDOS.s
+++ b/Firmware/src/ProDOS.s
@@ -1,7 +1,7 @@
 ;*******************************
 ;
 ; Apple][Sd Firmware
-; Version 1.2.2
+; Version 1.2.3
 ; ProDOS functions
 ;
 ; (c) Florian Reitz, 2017 - 2021
diff --git a/Firmware/src/Smartport.s b/Firmware/src/Smartport.s
index a601655..7bd4160 100644
--- a/Firmware/src/Smartport.s
+++ b/Firmware/src/Smartport.s
@@ -1,7 +1,7 @@
 ;*******************************
 ;
 ; Apple][Sd Firmware
-; Version 1.2.2
+; Version 1.2.3
 ; Smartport functions
 ;
 ; (c) Florian Reitz, 2017 - 2021
@@ -95,7 +95,7 @@ SMARTPORT:  LDY   #SMZPSIZE-1   ; save zeropage area for Smarport
             BCC   @RESTZP
 
             TXA
-;warum feste anzahl an bytes für return wert?
+;warum feste anzahl an bytes f�r return wert?
             LDY   #2            ; highbyte of # bytes transferred
             LDX   #0            ; low byte of # bytes transferred
 ;warum wird mit #1 verglichen?