diff --git a/Source/HBIOS/fd.asm b/Source/HBIOS/fd.asm
index 55b782fc..e20cffaf 100644
--- a/Source/HBIOS/fd.asm
+++ b/Source/HBIOS/fd.asm
@@ -231,12 +231,12 @@ FDMM_8		.DB	FDM111, $FF
 ; FDT_ VALUES DEFINED IN STD.ASM
 ;
 FD_DEVATTR:
-		.DB	%110 00000	; DRIVE TYPE NONE
-		.DB	%110 10101	; DRIVE TYPE 3.5 DD
-		.DB	%110 10110	; DRIVE TYPE 3.5 HD
-		.DB	%110 01101	; DRIVE TYPE 5.25 DD
-		.DB	%110 01110	; DRIVE TYPE 5.25 HD
-		.DB	%110 00101	; DRIVE TYPE 8
+		.DB	%11000000	; DRIVE TYPE NONE
+		.DB	%11010101	; DRIVE TYPE 3.5 DD
+		.DB	%11010110	; DRIVE TYPE 3.5 HD
+		.DB	%11001101	; DRIVE TYPE 5.25 DD
+		.DB	%11001110	; DRIVE TYPE 5.25 HD
+		.DB	%11000101	; DRIVE TYPE 8
 ;
 ; FDC COMMANDS
 ;