diff --git a/Source/HBIOS/md.asm b/Source/HBIOS/md.asm
index 14aed67d..61c6ae33 100644
--- a/Source/HBIOS/md.asm
+++ b/Source/HBIOS/md.asm
@@ -299,24 +299,16 @@ MD_RDSECF:				; CALLED FROM MD_RW
 ;
 	PUSH	HL			; IS THE SECTOR
 	LD	HL,(MD_LBA4K)		; WE WANT TO
-	XOR	A			; WRITE ALREADY
+	XOR	A			; READ ALREADY
 	SBC	HL,BC			; IN THE 4K
 	POP	HL			; BLOCK WE HAVE
-	JR	Z,MD_SECM		; IN THE BUFFER
+	JR	Z,MD_SECM		; IN THE BUFFER?
 ;
-
-
-					; DESIRED SECTOR
-					; IS NOT IN BUFFER
-	LD	(MD_LBA4K),BC		; WE WILL READ IN
-					; A NEW 4K SECTOR.
-					; SAVE THE 4K LBA
-					; FOR FUTURE CHECKS
-
-	CALL	MD_CALBAS		; SETUP BANK AND SECTOR
+					; DESIRED SECTOR IS NOT IN BUFFER
+	LD	(MD_LBA4K),BC		; WE WILL READ IN A NEW 4K SECTOR.
+					; SAVE THE 4K LBA FOR FUTURE CHECKS
 ;
-					; DE:HL CONTAIN SOURCE ADDRESS
-					; WHICH WAS SETUP BY MD_IOSETUPF
+	CALL	MD_CALBAS		; SETUP BANK AND SECTOR
 ;
 	LD	IX,MD_F4KBUF		; SET DESTINATION ADDRESS
 	LD	HL,MD_FREAD_R		; PUT ROUTINE TO CALL
@@ -381,32 +373,32 @@ MD_IOSETUPF:
 MD_CALBAS:
 ;
 #IF (MD_FDBG==1)
-	CALL	PC_SPACE	; DISPLAY SECTOR
-	CALL	PRTHEX32	; SECTOR ADDRESS 
-	CALL	PC_SPACE	; IN DE:HL
+	CALL	PC_SPACE		; DISPLAY SECTOR
+	CALL	PRTHEX32		; SECTOR ADDRESS 
+	CALL	PC_SPACE		; IN DE:HL
 #ENDIF
 ;
 	PUSH	HL
-	LD	A,E		; BOTTOM PORTION OF SECTOR
-	AND	$0F		; ADDRESS THAT GETS WRITTEN
-	RLC	H		; WITH ERASE COMMAND BYTE
-	RLA			; A15 GETS DROPPED OFF AND
-	LD	B,A		; ADDED TO BANK SELECT
-;
-	LD	A,H		; TOP SECTION OF SECTOR
-	RRA			; ADDRESS THAT GETS WRITTEN
-	AND	$70		; TO BANK SELECT PORT
+	LD	A,E			; BOTTOM PORTION OF SECTOR
+	AND	$0F			; ADDRESS THAT GETS WRITTEN
+	RLC	H			; WITH ERASE COMMAND BYTE
+	RLA				; A15 GETS DROPPED OFF AND
+	LD	B,A			; ADDED TO BANK SELECT
+;
+	LD	A,H			; TOP SECTION OF SECTOR
+	RRA				; ADDRESS THAT GETS WRITTEN
+	AND	$70			; TO BANK SELECT PORT
 	LD	C,A
 
 	POP	HL
 ;
-	LD	(MD_FBAS),BC	; SAVE BANK AND SECTOR FOR USE IN FLASH ROUTINES
+	LD	(MD_FBAS),BC		; SAVE BANK AND SECTOR FOR USE IN FLASH ROUTINES
 ;
 #IF (MD_FDBG==1)
-	CALL	PRTHEXWORD	; DISPLAY BANK AND
-	CALL	PC_SPACE	; SECTOR RESULT
+	CALL	PRTHEXWORD		; DISPLAY BANK AND
+	CALL	PC_SPACE		; SECTOR RESULT
 #ENDIF
-;
+
 	RET
 ;
 ; WRITE FLASH