diff --git a/Source/HBIOS/flashlib.inc b/Source/HBIOS/flashlib.inc
index 9342a061..37e89be5 100644
--- a/Source/HBIOS/flashlib.inc
+++ b/Source/HBIOS/flashlib.inc
@@ -14,6 +14,7 @@
 ;          NO STATUS IS RETURNED 
 ;======================================================================
 ;
+	.DB	MD_I_SZ			; SIZE OF RELOCATABLE CODE BUFFER REQUIRED
 MD_FIDEN_R:				; THIS CODE GETS RELOCATED TO HIGH MEMORY
 ;
 	LD	D,A			; SAVE CURRENT BANK
@@ -53,6 +54,7 @@ MD_I_SZ	.EQU	$-MD_FIDEN_R		; SIZE OF RELOCATABLE CODE BUFFER REQUIRED
 ; ON EXIT  C  RETURNS STATUS 0=SUCCESS NZ=FAIL
 ;======================================================================
 ;
+	.DB	MD_S_SZ			; SIZE OF RELOCATABLE CODE BUFFER REQUIRED
 MD_FERAS_R:				; THIS CODE GETS RELOCATED TO HIGH MEMORY
 ;
 	PUSH	AF			; SAVE CURRENT BANK
@@ -120,6 +122,7 @@ MD_S_SZ	.EQU	$-MD_FERAS_R		; SIZE OF RELOCATABLE CODE BUFFER REQUIRED
 ; ON EXIT  NO STATUS RETURNED
 ;======================================================================
 ;
+	.DB	MD_R_SZ			; SIZE OF RELOCATABLE CODE BUFFER REQUIRED
 MD_FREAD_R:				; THIS CODE GETS RELOCATED TO HIGH MEMORY
 ;
 	LD	H,C			; SECTOR
@@ -168,6 +171,7 @@ MD_R_SZ	.EQU	$-MD_FREAD_R		; SIZE OF RELOCATABLE CODE BUFFER REQUIRED
 ; ON EXIT  C  RETURNS STATUS 0=SUCCESS NZ=FAIL
 ;======================================================================
 ;
+	.DB	MD_V_SZ			; SIZE OF RELOCATABLE CODE BUFFER REQUIRED
 MD_FVERI_R:				; THIS CODE GETS RELOCATED TO HIGH MEMORY
 ;
 	LD	H,C			; SECTOR
@@ -219,6 +223,7 @@ MD_V_SZ	.EQU	$-MD_FVERI_R		; SIZE OF RELOCATABLE CODE BUFFER REQUIRED
 ; ON EXIT  NO STATUS IS RETURNED
 ;======================================================================
 ;
+	.DB	MD_W_SZ			; SIZE OF RELOCATABLE CODE BUFFER REQUIRED
 MD_FWRIT_R:				; THIS CODE GETS RELOCATED TO HIGH MEMORY
 ;
 	LD	H,C			; SECTOR
diff --git a/Source/HBIOS/md.asm b/Source/HBIOS/md.asm
index 42a42ce1..b566bafe 100644
--- a/Source/HBIOS/md.asm
+++ b/Source/HBIOS/md.asm
@@ -835,9 +835,13 @@ FF_NXT2:
 ;======================================================================
 ;
 MD_FNCALL:				; USING HBX_BUF FOR CODE AREA
+;
+	LD	B,0			; RETREIVE THE
+	DEC	HL			; CODE SIZE TO
+	LD	C,(HL)			; BE COPIED
+	INC	HL			; MAXIMUM 64 BYTES
 ;
 	LD	DE,HBX_BUF		; EXECUTE / START ADDRESS
-	LD	BC,MD_CSIZE		; CODE SIZE. MAXIMUM 64 BYTES
 	LDIR				; COPY OUR RELOCATABLE CODE TO THE BUFFER
 ;
 	LD	D,B			; PRESET DE TO ZERO TO REDUCE