diff --git a/Source/HBIOS/fd.asm b/Source/HBIOS/fd.asm
index 5edc02d1..c94aa41a 100644
--- a/Source/HBIOS/fd.asm
+++ b/Source/HBIOS/fd.asm
@@ -1120,23 +1120,14 @@ FD_WRITE:
 ;
 FD_RW:
 	LD	(FCD_DOP),A		; SAVE REQUESTED DISK OPERATION
-	LD	A,E			; BLOCK COUNT TO A
-	OR	A			; SET FLAGS
-	RET	Z			; ZERO SECTOR I/O, RETURN W/ E=0 & A=0
-	LD	B,A			; INIT SECTOR DOWNCOUNTER
-	LD	C,0			; INIT SECTOR READ/WRITE COUNT
-
-	PUSH	BC			; SAVE COUNTERS
 	CALL	FD_GEOM			; E := SPT, D := HDS
-	POP	BC			; RESTORE COUNTERS
 	JR	NZ,FD_RW4		; BAIL OUT ON ERROR
 	RES	7,D			; MAKE SURE LBA BIT IS CLEARED
 	LD	(FD_CURGEOM),DE		; SAVE AS FD_CURSPT & FD_CURHDS
 
 FD_RW1:
-	PUSH	BC			; SAVE COUNTERS
 	CALL	FD_RUN			; PERFORM SECTOR READ/WRITE
-	JR	NZ,FD_RW3		; IF ERROR, SKIP INCREMENT
+	JR	NZ,FD_RW4		; IF ERROR, SKIP INCREMENT
 
 	; INCREMENT SECTOR AND CHECK FOR TRACK OVERFLOW
 	LD	A,FD_HSTSEC		; HST SECTOR OFFSET IN CFG
@@ -1166,13 +1157,7 @@ FD_RW2:
 	INC	(HL)			; BUMP DMA BY
 	INC	(HL)			; ... 512 BYTES
 	XOR	A			; SIGNAL SUCCESS
-FD_RW3:
-	POP	BC			; RECOVER COUNTERS
-	JR	NZ,FD_RW4		; IF ERROR, BAIL OUT
-	INC	C			; BUMP COUNT OF SECTORS READ
-	DJNZ	FD_RW1			; LOOP AS NEEDED
 FD_RW4:
-	LD	E,C			; SECTOR READ COUNT TO E
 	LD	HL,(FD_DSKBUF)		; CURRENT DMA TO HL
 	OR	A			; SET FLAGS BASED ON RETURN CODE
 	RET				; AND RETURN, A HAS RETURN CODE
diff --git a/Source/HBIOS/hbios.asm b/Source/HBIOS/hbios.asm
index 4b59c772..4887f96c 100644
--- a/Source/HBIOS/hbios.asm
+++ b/Source/HBIOS/hbios.asm
@@ -4646,6 +4646,7 @@ HB_DSKREAD1:
 	LD	HL,HB_WRKBUF		; USE WORK BUF REAL I/O
 ;
 	; CALL READ FN
+	LD	E,1			; READ EXACTLY 1 SECTOR
 	CALL	HB_DSKFN		; READ ONE SECTOR
 ;
 	; IF FAIL, RETURN ERR
@@ -4748,6 +4749,7 @@ HB_DSKWRITE1:
 ;
 	; CALL WRITE FN
 	LD	HL,HB_WRKBUF		; WRITE FROM WORK BUFFER
+	LD	E,1			; WRITE EXACTLY 1 SECTOR
 	CALL	HB_DSKFN		; WRITE ONE SECTOR
 ;
 	; IF FAIL, RETURN ERR
@@ -4774,6 +4776,7 @@ HB_DSKIO:
 ;
 HB_DSKIO1:
 	; CALL READ/WRITE FN
+	LD	E,1			; READ/WRITE EXACTLY 1 SECTOR
 	CALL	HB_DSKFN		; READ/WRITE ONE SECTOR
 ;
 	; IF FAIL, RETURN ERR
diff --git a/Source/HBIOS/hdsk.asm b/Source/HBIOS/hdsk.asm
index af357564..c4d97357 100644
--- a/Source/HBIOS/hdsk.asm
+++ b/Source/HBIOS/hdsk.asm
@@ -218,24 +218,16 @@ HDSK_WRITE:
 HDSK_RW:
 	LD	(HDSK_CMD),A		; SET COMMAND BYTE
 	LD	(HDSK_DMA),HL		; SAVE INITIAL DMA
-	LD	A,E			; SECTOR COUNT TO A
-	OR	A			; SET FLAGS
-	RET	Z			; ZERO SECTOR I/O, RETURN W/ E=0 & A=0
-	LD	B,A			; INIT SECTOR DOWNCOUNTER
-	LD	C,0			; INIT SECTOR READ/WRITE COUNT
 	LD	A,(IY+HDSK_DEV)		; GET DEVICE NUMBER
 	LD	(HDSK_DRV),A		; ... AND SET FIELD IN HDSK PARM BLOCK
 
 	; RESET HDSK INTERFACE IF NEEDED
 	LD	A,(IY+HDSK_STAT)	; GET CURRENT STATUS
 	OR	A			; SET FLAGS
-	PUSH	BC			; SAVE COUNTERS
 	CALL	NZ,HDSK_DSKRESET	; RESET IF NOT READY
-	POP	BC			; RESTORE COUNTERS
 	JR	NZ,HDSK_RW6		; ABORT ON FAILURE
 
 HDSK_RW0:
-	PUSH	BC			; SAVE COUNTERS
 	XOR	A			; A = 0
 	LD	(HDSK_RC),A		; CLEAR RETURN CODE
 ;
@@ -282,7 +274,7 @@ HDSK_RW0:
 	POP	AF			; RESTORE RETURN CODE
 #ENDIF
 
-	JR	NZ,HDSK_RW5		; BAIL OUT ON ERROR
+	JR	NZ,HDSK_RW6		; BAIL OUT ON ERROR
 
 	; INCREMENT LBA
 	LD	A,HDSK_LBA		; LBA OFFSET IN CFG ENTRY
@@ -296,16 +288,8 @@ HDSK_RW0:
 
 	XOR	A			; A := 0 SIGNALS SUCCESS
 
-HDSK_RW5:
-	POP	BC			; RECOVER COUNTERS
-	JR	NZ,HDSK_RW6		; IF ERROR, GET OUT
-
-	INC	C			; RECORD SECTOR COMPLETED
-	DJNZ	HDSK_RW0		; LOOP AS NEEDED
-
 HDSK_RW6:
 	; RETURN WITH SECTORS READ IN E AND UPDATED DMA ADDRESS IN HL
-	LD	E,C			; SECTOR READ COUNT TO E
 	LD	HL,(HDSK_DMA)		; CURRENT DMA TO HL
 	OR	A			; SET FLAGS BASED ON RETURN CODE
 	RET	Z			; RETURN IF SUCCESS
diff --git a/Source/HBIOS/ide.asm b/Source/HBIOS/ide.asm
index c365f8e1..da5171a2 100644
--- a/Source/HBIOS/ide.asm
+++ b/Source/HBIOS/ide.asm
@@ -667,25 +667,17 @@ IDE_WRITE:
 ;
 IDE_IO:
 	LD	(IDE_DSKBUF),HL		; SAVE DISK BUFFER ADDRESS
-	LD	A,E			; BLOCK COUNT TO A
-	OR	A			; SET FLAGS
-	RET	Z			; ZERO SECTOR I/O, RETURN W/ E=0 & A=0
-	LD	B,A			; INIT SECTOR DOWNCOUNTER
-	LD	C,0			; INIT SECTOR READ/WRITE COUNT
 #IF (IDETRACE == 1)
 	LD	HL,IDE_PRTERR		; SET UP IDE_PRTERR
 	PUSH	HL			; ... TO FILTER ALL EXITS
 #ENDIF
-	PUSH	BC			; SAVE COUNTERS
 	CALL	IDE_CHKERR		; CHECK FOR ERR STATUS AND RESET IF SO
-	POP	BC			; RESTORE COUNTERS
 	JR	NZ,IDE_IO3		; BAIL OUT ON ERROR
 IDE_IO1:
-	PUSH	BC			; SAVE COUNTERS
 	CALL	IDE_SELUNIT		; HARDWARE SELECTION OF TARGET UNIT
 	LD	HL,(IDE_IOFNADR)	; GET PENDING IO FUNCTION ADDRESS
 	CALL	JPHL			; ... AND CALL IT
-	JR	NZ,IDE_IO2		; IF ERROR, SKIP INCREMENT
+	JR	NZ,IDE_IO3		; IF ERROR, SKIP INCREMENT
 	; INCREMENT LBA
 	LD	A,IDE_LBA		; LBA OFFSET
 	CALL	LDHLIYA			; HL := IY + A, REG A TRASHED
@@ -695,13 +687,7 @@ IDE_IO1:
 	INC	(HL)			; BUMP DMA BY
 	INC	(HL)			; ... 512 BYTES
 	XOR	A			; SIGNAL SUCCESS
-IDE_IO2:
-	POP	BC			; RECOVER COUNTERS
-	JR	NZ,IDE_IO3		; IF ERROR, BAIL OUT
-	INC	C			; BUMP COUNT OF SECTORS READ
-	DJNZ	IDE_IO1			; LOOP AS NEEDED
 IDE_IO3:
-	LD	E,C			; SECTOR READ COUNT TO E
 	LD	HL,(IDE_DSKBUF)		; CURRENT DMA TO HL
 	OR	A			; SET FLAGS BASED ON RETURN CODE
 	RET	Z			; RETURN IF SUCCESS
diff --git a/Source/HBIOS/md.asm b/Source/HBIOS/md.asm
index 589419d1..3eef75b9 100644
--- a/Source/HBIOS/md.asm
+++ b/Source/HBIOS/md.asm
@@ -295,13 +295,7 @@ MD_WR1:
 ;
 MD_RW:
 	LD	(MD_DSKBUF),HL		; SAVE DISK BUFFER ADDRESS
-	LD	A,E			; BLOCK COUNT TO A
-	OR	A			; SET FLAGS
-	RET	Z			; ZERO SECTOR I/O, RETURN W/ E=0 & A=0
-	LD	B,A			; INIT SECTOR DOWNCOUNTER
-	LD	C,0			; INIT SECTOR READ/WRITE COUNT
 MD_RW1:
-	PUSH	BC			; SAVE COUNTERS
 ;
 ;;;#IF (DSKYENABLE)
 ;;;  #IF (DSKYDSKACT)
@@ -319,7 +313,7 @@ MD_RW1:
 #ELSE
 	CALL	JPHL			; ... AND CALL IT
 #ENDIF
-	JR	NZ,MD_RW2		; IF ERROR, SKIP INCREMENT
+	JR	NZ,MD_RW3		; IF ERROR, SKIP INCREMENT
 	; INCREMENT LBA
 	LD	A,MD_LBA		; LBA OFFSET IN CFG ENTRY
 	CALL	LDHLIYA			; HL := IY + A, REG A TRASHED
@@ -329,13 +323,7 @@ MD_RW1:
 	INC	(HL)			; BUMP DMA BY
 	INC	(HL)			; ... 512 BYTES
 	XOR	A			; SIGNAL SUCCESS
-MD_RW2:
-	POP	BC			; RECOVER COUNTERS
-	JR	NZ,MD_RW3		; IF ERROR, BAIL OUT
-	INC	C			; BUMP COUNT OF SECTORS READ
-	DJNZ	MD_RW1			; LOOP AS NEEDED
 MD_RW3:
-	LD	E,C			; SECTOR READ COUNT TO E
 	LD	HL,(MD_DSKBUF)		; CURRENT DMA TO HL
 	OR	A			; SET FLAGS BASED ON RETURN CODE
 	RET				; AND RETURN, A HAS RETURN CODE
diff --git a/Source/HBIOS/ppide.asm b/Source/HBIOS/ppide.asm
index 541d320f..a109720d 100644
--- a/Source/HBIOS/ppide.asm
+++ b/Source/HBIOS/ppide.asm
@@ -694,25 +694,17 @@ PPIDE_WRITE:
 ;
 PPIDE_IO:
 	LD	(PPIDE_DSKBUF),HL	; SAVE DISK BUFFER ADDRESS
-	LD	A,E			; BLOCK COUNT TO A
-	OR	A			; SET FLAGS
-	RET	Z			; ZERO SECTOR I/O, RETURN W/ E=0 & A=0
-	LD	B,A			; INIT SECTOR DOWNCOUNTER
-	LD	C,0			; INIT SECTOR READ/WRITE COUNT
 #IF (PPIDETRACE == 1)
 	LD	HL,PPIDE_PRTERR		; SET UP PPIDE_PRTERR
 	PUSH	HL			; ... TO FILTER ALL EXITS
 #ENDIF
-	PUSH	BC			; SAVE COUNTERS
 	CALL	PPIDE_CHKERR		; CHECK FOR ERR STATUS AND RESET IF SO
-	POP	BC			; RESTORE COUNTERS
 	JR	NZ,PPIDE_IO3		; BAIL OUT ON ERROR
 PPIDE_IO1:
-	PUSH	BC			; SAVE COUNTERS
 	CALL	PPIDE_SELUNIT		; HARDWARE SELECTION OF TARGET UNIT
 	LD	HL,(PPIDE_IOFNADR)	; GET PENDING IO FUNCTION ADDRESS
 	CALL	JPHL			; ... AND CALL IT
-	JR	NZ,PPIDE_IO2		; IF ERROR, SKIP INCREMENT
+	JR	NZ,PPIDE_IO3		; IF ERROR, SKIP INCREMENT
 	; INCREMENT LBA
 	LD	A,PPIDE_LBA		; LBA OFFSET
 	CALL	LDHLIYA			; HL := IY + A, REG A TRASHED
@@ -722,13 +714,7 @@ PPIDE_IO1:
 	INC	(HL)			; BUMP DMA BY
 	INC	(HL)			; ... 512 BYTES
 	XOR	A			; SIGNAL SUCCESS
-PPIDE_IO2:
-	POP	BC			; RECOVER COUNTERS
-	JR	NZ,PPIDE_IO3		; IF ERROR, BAIL OUT
-	INC	C			; BUMP COUNT OF SECTORS READ
-	DJNZ	PPIDE_IO1		; LOOP AS NEEDED
 PPIDE_IO3:
-	LD	E,C			; SECTOR READ COUNT TO E
 	LD	HL,(PPIDE_DSKBUF)	; CURRENT DMA TO HL
 	OR	A			; SET FLAGS BASED ON RETURN CODE
 	RET	Z			; RETURN IF SUCCESS
diff --git a/Source/HBIOS/ppp.asm b/Source/HBIOS/ppp.asm
index a4afb9e5..b1de0b83 100644
--- a/Source/HBIOS/ppp.asm
+++ b/Source/HBIOS/ppp.asm
@@ -534,24 +534,16 @@ PPPSD_WRITE:
 ;
 PPPSD_IO:
 	LD	(PPPSD_DSKBUF),HL	; SAVE DISK BUFFER ADDRESS
-	LD	A,E			; BLOCK COUNT TO A
-	OR	A			; SET FLAGS
-	RET	Z			; ZERO SECTOR I/O, RETURN W/ E=0 & A=0
-	LD	B,A			; INIT SECTOR DOWNCOUNTER
-	LD	C,0			; INIT SECTOR R/W COUNTER
 
 #IF (PPPSDTRACE == 1)
 	LD	HL,PPPSD_PRTERR		; SET UP PPPSD_PRTERR
 	PUSH	HL			; ... TO FILTER ALL EXITS
 #ENDIF
 
-	PUSH	BC			; SAVE COUNTERS
 	CALL	PPPSD_CHKCARD		; CHECK / REINIT CARD AS NEEDED
-	POP	BC			; RESTORE COUNTERS
 	JR	NZ,PPPSD_IO3		; BAIL OUT ON ERROR
 
 PPPSD_IO1:
-	PUSH	BC			; SAVE COUNTERS
 
 #IF (PPPSDTRACE >= 3)
 	CALL	PPPSD_PRTPREFIX
@@ -559,7 +551,7 @@ PPPSD_IO1:
 
 	LD	HL,(PPPSD_IOFNADR)	; GET PENDING IO FUNCTION ADDRESS
 	CALL	JPHL			; ... AND CALL IT
-	JR	NZ,PPPSD_IO2		; BAIL OUT ON ERROR
+	JR	NZ,PPPSD_IO3		; BAIL OUT ON ERROR
 	; INCREMENT LBA
 	LD	A,PPPSD_LBA		; LBA OFFSET
 	CALL	LDHLIYA			; HL := IY + A, REG A TRASHED
@@ -570,14 +562,7 @@ PPPSD_IO1:
 	INC	(HL)			; ... 512 BYTES
 	XOR	A			; SIGNAL SUCCESS
 
-PPPSD_IO2:
-	POP	BC			; RECOVER COUNTERS
-	JR	NZ,PPPSD_IO3		; IF ERROR PENDING, BAIL OUT
-	INC	C			; BUMP COUNT OF SECTORS READ
-	DJNZ	PPPSD_IO1		; LOOP AS NEEDED
-
 PPPSD_IO3:
-	LD	E,C			; SECTOR READ COUNT TO E
 	LD	HL,(PPPSD_DSKBUF)	; CURRENT BUF ADR TO HL
 	OR	A			; SET FLAGS BASED ON RETURN CODE
 	RET	Z			; RETURN IF SUCCESS
diff --git a/Source/HBIOS/prp.asm b/Source/HBIOS/prp.asm
index db923c5a..0efe5361 100644
--- a/Source/HBIOS/prp.asm
+++ b/Source/HBIOS/prp.asm
@@ -431,32 +431,23 @@ PRPSD_WRITE:
 ;
 PRPSD_IO:
 	LD	(PRPSD_DSKBUF),HL	; SAVE DISK BUFFER ADDRESS
-	LD	A,E			; BLOCK COUNT TO A
-	OR	A			; SET FLAGS
-	RET	Z			; ZERO SECTOR I/O, RETURN W/ E=0 & A=0
-	LD	B,A			; INIT SECTOR DOWNCOUNTER
-	LD	C,0			; INIT SECTOR R/W COUNTER
 
 #IF (PRPSDTRACE == 1)
 	LD	HL,PRPSD_PRTERR		; SET UP PRPSD_PRTERR
 	PUSH	HL			; ... TO FILTER ALL EXITS
 #ENDIF
 
-	PUSH	BC			; SAVE COUNTERS
 	CALL	PRPSD_CHKCARD		; CHECK / REINIT CARD AS NEEDED
-	POP	BC			; RESTORE COUNTERS
 	JR	NZ,PRPSD_IO3		; BAIL OUT ON ERROR
 
 PRPSD_IO1:
-	PUSH	BC			; SAVE COUNTERS
-
 #IF (PRPSDTRACE >= 3)
 	CALL	PRPSD_PRTPREFIX
 #ENDIF
 
 	LD	HL,(PRPSD_IOFNADR)	; GET PENDING IO FUNCTION ADDRESS
 	CALL	JPHL			; ... AND CALL IT
-	JR	NZ,PRPSD_IO2		; BAIL OUT ON ERROR
+	JR	NZ,PRPSD_IO3		; BAIL OUT ON ERROR
 	; INCREMENT LBA
 	LD	A,PRPSD_LBA		; LBA OFFSET
 	CALL	LDHLIYA			; HL := IY + A, REG A TRASHED
@@ -467,14 +458,7 @@ PRPSD_IO1:
 	INC	(HL)			; ... 512 BYTES
 	XOR	A			; SIGNAL SUCCESS
 
-PRPSD_IO2:
-	POP	BC			; RECOVER COUNTERS
-	JR	NZ,PRPSD_IO3		; IF ERROR PENDING, BAIL OUT
-	INC	C			; BUMP COUNT OF SECTORS READ
-	DJNZ	PRPSD_IO1		; LOOP AS NEEDED
-
 PRPSD_IO3:
-	LD	E,C			; SECTOR READ COUNT TO E
 	LD	HL,(PRPSD_DSKBUF)	; CURRENT BUF ADR TO HL
 	OR	A			; SET FLAGS BASED ON RETURN CODE
 	RET	Z			; RETURN IF SUCCESS
diff --git a/Source/HBIOS/rf.asm b/Source/HBIOS/rf.asm
index 9fa5eb83..2ffa687e 100644
--- a/Source/HBIOS/rf.asm
+++ b/Source/HBIOS/rf.asm
@@ -250,17 +250,11 @@ RF_WRITE:
 ;
 RF_RW:
 	LD	(RF_DSKBUF),HL		; SAVE DISK BUFFER ADDRESS
-	LD	A,E			; BLOCK COUNT TO A
-	OR	A			; SET FLAGS
-	RET	Z			; ZERO SECTOR I/O, RETURN W/ E=0 & A=0
-	LD	B,A			; INIT SECTOR DOWNCOUNTER
-	LD	C,0			; INIT SECTOR READ/WRITE COUNT
 	CALL	RF_SETIO		; SET BASE PORT IO ADR FOR SELECTED UNIT
 RF_RW1:
-	PUSH	BC			; SAVE COUNTERS
 	LD	HL,(RF_RWFNADR)		; GET PENDING IO FUNCTION ADDRESS
 	CALL	JPHL			; ... AND CALL IT
-	JR	NZ,RF_RW2		; IF ERROR, SKIP INCREMENT
+	JR	NZ,RF_RW3		; IF ERROR, SKIP INCREMENT
 	; INCREMENT LBA
 	LD	A,MD_LBA		; OFFSET OF LBA VALUE
 	CALL	LDHLIYA			; HL := IY + A, REG A TRASHED
@@ -270,13 +264,7 @@ RF_RW1:
 	INC	(HL)			; BUMP DMA BY
 	INC	(HL)			; ... 512 BYTES
 	XOR	A			; SIGNAL SUCCESS
-RF_RW2:
-	POP	BC			; RECOVER COUNTERS
-	JR	NZ,RF_RW3		; IF ERROR, BAIL OUT
-	INC	C			; BUMP COUNT OF SECTORS READ
-	DJNZ	RF_RW1			; LOOP AS NEEDED
 RF_RW3:
-	LD	E,C			; SECTOR READ COUNT TO E
 	LD	HL,(RF_DSKBUF)		; CURRENT DMA TO HL
 	OR	A			; SET FLAGS BASED ON RETURN CODE
 	RET	Z			; RETURN SUCCESS
diff --git a/Source/HBIOS/sd.asm b/Source/HBIOS/sd.asm
index 123ab687..71812ce6 100644
--- a/Source/HBIOS/sd.asm
+++ b/Source/HBIOS/sd.asm
@@ -1005,10 +1005,6 @@ SD_WRITE:
 SD_IO:
 	LD	(SD_CMDVAL),A		; SAVE THE SD CARD COMMAND
 	LD	(SD_DSKBUF),HL		; SAVE DISK BUFFER ADDRESS
-	LD	A,E			; GET BLOCK COUNT REQUESTED
-	LD	(SD_BLKCNT),A		; ... AND SAVE IT
-	OR	A			; SET FLAGS
-	RET	Z			; ZERO SECTOR I/O, RETURN W/ E=0 & A=0
 ;
 	; SET CSIO FOR HIGH SPEED OPERATION
 	CALL	SD_SPD_FAST
@@ -1028,18 +1024,11 @@ SD_IO:
 	CP	SD_CMD_READ_SNGL_BLK	; IS THIS A READ?
 	CALL	NZ,SD_CHKWP		; CHECK FOR WRITE PROTECT IF NOT A READ
 	JP	NZ,SD_WRTPROT		; HANDLE WRITE PROTECT ERR
-	LD	A,(SD_BLKCNT)		; BLOCK COUNT TO A
-	LD	E,A			; ... AND TO E IN CASE OF ZERO ERR BELOW
-	OR	A			; SET FLAGS
-	RET	Z			; ZERO SECTOR I/O, RETURN W/ E=0 & A=0
-	LD	B,A			; INIT SECTOR DOWNCOUNTER
-	LD	C,0			; INIT SECTOR READ/WRITE COUNT
 SD_IO1:
-	PUSH	BC			; SAVE COUNTERS
 	LD	A,(SD_CMDVAL)		; SET COMMAND
 	LD	C,A			; ... AND PUT IN C
 	CALL	SD_SECTIO		; DO SECTOR I/O
-	JR	NZ,SD_IO2		; IF ERROR, SKIP INCREMENT
+	JR	NZ,SD_IO3		; IF ERROR, SKIP INCREMENT
 	; INCREMENT LBA
 	LD	A,SD_LBA		; LBA OFFSET
 	CALL	LDHLIYA			; HL := IY + A, REG A TRASHED
@@ -1049,13 +1038,7 @@ SD_IO1:
 	INC	(HL)			; BUMP DMA BY
 	INC	(HL)			; ... 512 BYTES
 	XOR	A			; SIGNAL SUCCESS
-SD_IO2:
-	POP	BC			; RECOVER COUNTERS
-	JR	NZ,SD_IO3		; IF ERROR, BAIL OUT
-	INC	C			; BUMP COUNT OF SECTORS READ
-	DJNZ	SD_IO1			; LOOP AS NEEDED
 SD_IO3:
-	LD	E,C			; SECTOR READ COUNT TO E
 	LD	HL,(SD_DSKBUF)		; CURRENT DMA TO HL
 	OR	A			; SET FLAGS BASED ON RETURN CODE
 	RET	Z			; RETURN IF SUCCESS
@@ -2656,7 +2639,6 @@ SD_STR_TYPESDXC		.TEXT	"SDXC$"
 SD_OPRVAL	.DB	0		; CURRENT OPR REG VALUE
 SD_LCNT		.DB	0		; LOOP COUNTER
 SD_CMDVAL	.DB	0		; PENDING COMMAND FOR IO FUCNTIONS
-SD_BLKCNT	.DB	0		; BLOCK COUNT REQUESTED FOR IO FUNCTIONS
 ;
 SD_BUF		.FILL	16,0		; WORK BUFFER
 ;
diff --git a/Source/ver.inc b/Source/ver.inc
index d9fcfede..50f4c8b0 100644
--- a/Source/ver.inc
+++ b/Source/ver.inc
@@ -2,7 +2,7 @@
 #DEFINE	RMN	6
 #DEFINE	RUP	0
 #DEFINE	RTP	0
-#DEFINE BIOSVER	"3.6.0-dev.38"
+#DEFINE BIOSVER	"3.6.0-dev.39"
 #define rmj	RMJ
 #define rmn	RMN
 #define rup	RUP
diff --git a/Source/ver.lib b/Source/ver.lib
index 7c14b45e..299e3563 100644
--- a/Source/ver.lib
+++ b/Source/ver.lib
@@ -3,5 +3,5 @@ rmn	equ	6
 rup	equ	0
 rtp	equ	0
 biosver	macro
-	db	"3.6.0-dev.38"
+	db	"3.6.0-dev.39"
 	endm