Update md.asm

minors

Source/HBIOS/md.asm

@@ -261,7 +261,13 @@ MD_RW:
 MD_RW1:
 	PUSH	BC			; SAVE COUNTERS
 	LD	HL,(MD_RWFNADR)		; GET PENDING IO FUNCTION ADDRESS
+#IF (MDFFENABLE)
+	PUSH	IX
 	CALL	JPHL			; ... AND CALL IT
+	POP	IX
+#ELSE
+	CALL	JPHL			; ... AND CALL IT
+#ENDIF
 	JR	NZ,MD_RW2		; IF ERROR, SKIP INCREMENT
 	; INCREMENT LBA
 	LD	A,MD_LBA		; LBA OFFSET IN CFG ENTRY
@@ -297,7 +303,7 @@ MD_RDSECF:				; CALLED FROM MD_RW
 	POP	HL			; BLOCK WE HAVE
 	JR	Z,MD_SECM		; IN THE BUFFER
 ;
-MD_SECR:
+;MD_SECR:
 					; DESIRED SECTOR
 					; IS NOT IN BUFFER
 	LD	(MD_LBA4K),BC		; WE WILL READ IN
@@ -307,10 +313,9 @@ MD_SECR:
 ;
 					; DE:HL CONTAIN SOURCE ADDRESS
 					; WHICH WAS SETUP BY MD_IOSETUPF
-	PUSH	IX
+;
 	LD	IX,MD_F4KBUF		; SET DESTINATION ADDRESS
 	CALL	MD_FREAD		; READ 4K SECTOR
-	POP	IX
 ;
 MD_SECM:
 	LD	A,(IY+MD_LBA+0)		; GET SECTOR WITHIN 4K BLOCK
@@ -332,7 +337,7 @@ MD_SECM:
 ;
 ; ON EXIT
 ;  BC    = LBA 4K BLOCK WE ARE ACCESSING
-;  DE:HL = MEMORY ADDRESS TO READ FROM IN FLASH
+;  DE:HL = MEMORY ADDRESS TO ACCESS IN FLASH
 ;
 MD_IOSETUPF:
 	LD	L,(IY+MD_LBA+0)		; HL := LOW WORD OF LBA
@@ -369,15 +374,11 @@ MD_WRSECF:				; CALLED FROM MD_RW
 ;
 	LD	(MD_LBA4K),BC		; SAVE 4K LBA
 ;
-	PUSH	IX
 	LD	IX,MD_F4KBUF		; SET DESTINATION ADDRESS
 	CALL	MD_FREAD		; READ 4K SECTOR
-	POP	IX
 ;
 MD_SECM1:				; DESIRED SECTOR IS IN BUFFER
-	PUSH	IX
 	CALL	MD_FERAS		; ERASE 4K SECTOR
-	POP	IX
 	OR	A
 	RET	NZ			; RETURN IF ERROR
 ;
@@ -403,10 +404,8 @@ MD_SECM1:				; DESIRED SECTOR IS IN BUFFER
 	POP	DE
 	POP	HL
 ;
-	PUSH	IX
 	LD	IX,MD_F4KBUF		; WRITE THE SECTOR
 	CALL	MD_FWRIT
-	POP	IX
 ;
 	XOR	A
 ;
@@ -651,15 +650,13 @@ FF_PROBE:
 	CALL	MD_FIDENT		; GET ID AT THIS ADDRESS
 
 	PUSH	HL
-;	PUSH	DE
 	LD	HL,MD_TGTDEV		; IF WE MATCH WITH
 	XOR	A			; A NON 39SF040
 	SBC	HL,BC			; CHIP SET THE
 	LD	A,(MD_FFSEN)		; R/W FLAG TO R/O
 	OR	H
-	OR	L
+	OR	L			; A NON ZERO VALUE
-	LD	(MD_FFSEN),A		; A NON ZERO VALUE
+	LD	(MD_FFSEN),A		; MEANS WE CAN'T
-;	POP	DE			; MEANS WE CAN'T
 	POP	HL			; ENABLE FLASH WRITING
 #IF (MD_FVBS==1)
 	CALL	MD_LAND			; LOOKUP AND DISPLAY
@@ -693,8 +690,6 @@ MD_LAND:
 ;
 #IF (MD_FDBG==1)
 	PRTS(" ID:$")
-;	LD	H,C
-;	LD	L,B
 	CALL	PRTHEXWORD		; DISPLAY FLASH ID
 	CALL	PC_SPACE
 #ENDIF