Update fd.asm

- Improve FDC hardware detection.

Source/HBIOS/fd.asm

@@ -743,6 +743,8 @@ FD_INIT0:
 ; DOES NOT ATTEMPT TO DETERMINE THE ACTUAL VARIANT.
 ;
 FD_DETECT:
+	IN	A,(FDC_MSR)	; IGNORE FIRST READ
+	CALL	DLY32		; WAIT A BIT FOR FDC
 	IN	A,(FDC_MSR)	; READ MSR
 	CP	$80
 	JR	Z,FD_DETECT1	; $80 IS OK
@@ -751,6 +753,7 @@ FD_DETECT:
 	RET			; NOPE, ABORT WITH ZF=NZ
 ;
 FD_DETECT1:
+	CALL	DLY32		; WAIT A BIT FOR FDC
 	IN	A,(FDC_MSR)	; READ MSR AGAIN
 	CP	$80
 	RET			; $80 OK, ELSE NOT PRESENT