Add SmallZ80 Support to FDU

Doc/ChangeLog.txt

@@ -17,6 +17,7 @@ Version 2.9.1
 - WBW: Added preliminary support for interrupt management API
 - P?S: Improved boot messages in RAM-Floppy driver
 - P?S: Added charge setting display to RTC boot messages
+- WBW: Add SmallZ80 support to FDU
 
 Version 2.9.0
 -------------

Doc/FDU.txt

@@ -1,9 +1,9 @@
 ================================================================
-Floppy Disk Utility (FDU) v5.1 for RetroBrew Computers 
-Disk IO / Zeta / Dual-IDE / N8
+Floppy Disk Utility (FDU) v5.3 for RetroBrew Computers 
+Disk IO / Zeta / Dual-IDE / N8 / RC2014 / SmallZ80
 ================================================================
 
-Updated December 16, 2017
+Updated September 5, 2018
 by Wayne Warthen (wwarthen@gmail.com)
 
 Application to test the hardware functionality of the Floppy 
@@ -74,6 +74,9 @@ supported:
  - Zeta 2
  - N8
  - Mark IV
+ - RC2014 w/ SMC
+ - RC2014 w/ WDC
+ - SmallZ80
 
 You must be using either a RomWBW or UBA based OS version.
 
@@ -85,13 +88,15 @@ You must have one of the following floppy disk controllers:
  - Zeta SBC onboard FDC
  - Zeta 2 SBC onboard FDC
  - N8 SBC onboard FDC
+ - RC2014 Scott Baker SMC-based Floppy Module
+ - RC2014 Scott Baker WDC-based Floppy Module
  
 Finally, you will need a floppy drive connected via an 
 appropriate cable:
 
 Disk IO - no twist in cable, drive unit 0/1 must be selected by jumper on drive
-DISK IO 3, Zeta, Zeta 2 - cable with twist, unit 0 after twist, unit 1 before twist
-DIDE, N8 - cable with twist, unit 0 before twist, unit 1 after twist
+DISK IO 3, Zeta, Zeta 2, RC2014 - cable with twist, unit 0 after twist, unit 1 before twist
+DIDE, N8, Mark IV, SmallZ80 - cable with twist, unit 0 before twist, unit 1 after twist
 
 Note that FDU does not utilize your systems ROM or OS to 
 access the floppy system.  FDU interacts directly with 
@@ -138,6 +143,16 @@ P5 (bd ID): 1-2, 3-4 (for $20-$3F port range)
 There are no specific N8 jumper settings, but the default
 I/O range starting at $80 is assumed in the published code.
 
+The RC2014 Scott Baker SMC-based floppy module should be jumpered
+for I/O base address 0x50 (SV1: 11-12), JP1 (TS) shorted,
+JP2 (/FAULT) shorted, JP3 (MINI): 2-3, JP4 (/DC/RDY): 2-3.
+
+The RC2014 Scott Baker WDC-based floppy module should be jumpered
+for I/O base address 0x50 (SV1: 11-12), JP1 (/DACK): 1-2,
+JP2 (TC): 2-3.
+
+SmallZ80 does not have any relevant jumper settings.  The 
+hardwired I/O ranges are assumed in the code.
 
 Modes of Operation
 ------------------
@@ -481,3 +496,12 @@ WW 1/8/2018: v5.2
 Added support for RC2014 hardware:
   - Scott Baker SMC 9266 FDC module
   - Scott Baker WDC 37C65 FDC module
+
+WW 9/5/2018: v5.3
+  - Removed use of pulsing TC to end R/W operations after one sector and
+    instead set EOT = R (sector number) so that after desired sector is
+    read, R/W stops with end of cylinder error which is a documented
+    method for controling number of sectors R/W.  This specific termination
+    condition is no longer considered an error, but a successful end of
+    operation.
+  - Added support for SmallZ80

Source/Apps/FDU/FDU.asm

@@ -41,6 +41,9 @@
 ;   2018-01-08: V5.2	ADDED RC2014 SUPPORT FOR:
 ;			- SCOTT BAKER (SMB) SMC 9266 FDC
 ;			- SCOTT BAKER (SMB) WDC 37C65 FDC
+;   2018-09-05: v5.3	ADDED SUPPORT FOR SMALLZ80
+;			- USE EOT=R TO END R/W AFTER ONE SECTOR INSTEAD
+;			  OF USING PULSE TC
 ;			
 ;_______________________________________________________________________________
 ;
@@ -60,6 +63,11 @@
 ;_______________________________________________________________________________
 ;
 ;
+FALSE		.EQU		0
+TRUE		.EQU		~FALSE
+;
+; FDC ID
+;
 FDC_DIO		.EQU		0
 FDC_DIO3	.EQU		1
 FDC_ZETA	.EQU		2
@@ -68,18 +76,15 @@ FDC_DIDE	.EQU		4
 FDC_N8		.EQU		5
 FDC_RCSMC	.EQU		6
 FDC_RCWDC	.EQU		7
+FDC_SMZ80	.EQU		8
 ;
-_DIO		.EQU		1 << FDC_DIO
-_DIO3		.EQU		1 << FDC_DIO3
-_ZETA		.EQU		1 << FDC_ZETA
-_ZETA2		.EQU		1 << FDC_ZETA2
-_DIDE		.EQU		1 << FDC_DIDE
-_N8		.EQU		1 << FDC_N8
-_RCSMC		.EQU		1 << FDC_RCSMC
-_RCWDC		.EQU		1 << FDC_RCWDC
+; FDC MODE
 ;
-FALSE		.EQU		0
-TRUE		.EQU		~FALSE
+_DIO		.EQU		$01	; CUSTOM FOR DIO BOARD
+_DIO3		.EQU		$02	; CUSTOM FOR DIO3 BOARD
+_ZETA		.EQU		$04	; CUSTOM FOR ZETA
+_RCSMC		.EQU		$08	; CUSTOM FOR RC2014 SMB SMC MODULE
+_PCAT		.EQU		$10	; PC/AT MODE IN NEWER CONTROLLERS
 ;
 ;===============================================================================
 ; MAIN PROGRAM PROCEDURE
@@ -177,11 +182,13 @@ INIT1:
 	JR	INIT3		; AND DONE
 	
 INIT2:
-	; NO KNOWN BIOS DETECTED, BAIL OUT W/ ERROR
-	LD	DE,STR_BIOERR
-	CALL	WRITESTR
-	OR	0FFH
-	RET
+	;; NO KNOWN BIOS DETECTED, BAIL OUT W/ ERROR
+	;LD	DE,STR_BIOERR
+	;CALL	WRITESTR
+	;OR	0FFH
+	;RET
+	LD	A,20
+	LD	(CPUSPD),A
 	
 INIT3:
 	; COMPUTE CPU SCALER FOR DELAY LOOPS
@@ -204,8 +211,8 @@ INIT5:
 	XOR	A
 	RET
 		
-STR_BANNER	.DB	"Floppy Disk Utility (FDU) v5.2, 08-Jan-2018$"
-STR_BANNER2	.DB	"Copyright (C) 2017, Wayne Warthen, GNU GPL v3","$"
+STR_BANNER	.DB	"Floppy Disk Utility (FDU) v5.3, 28-Sep-2018$"
+STR_BANNER2	.DB	"Copyright (C) 2018, Wayne Warthen, GNU GPL v3","$"
 STR_HBIOS	.DB	" [HBIOS]$"
 STR_UBIOS	.DB	" [UBIOS]$"
 ;
@@ -238,20 +245,7 @@ FDCSEL1:
 FDCSEL2:
 	; SAVE SELECTED FDC IDENTIFIER
 	DEC	A			; CONVERT TO ZERO-BASED FDC ID
-	LD	(FDCID),A			; RECORD THE FDC ID
-	PUSH	AF			; SAVE IT
-;
-	; CREATE AND SAVE A BIT MAPPED VALUE
-	INC	A			; PREPARE LOOP COUNT
-	LD	B,A			; AND PUT IN B
-	XOR	A			; START WITH ALL BITS OFF
-	SCF				; ... AND CF SET
-FDCSEL3:
-	RLA				; ROTATE BIT TO NEXT POSITION
-	DJNZ	FDCSEL3			; AND CONTINUE TILL DONE
-	LD	(FDCBM),A		; SAVE BITMAP VALUE
-;
-	POP	AF			; RESTORE FDC ID
+	LD	(FDCID),A		; RECORD THE FDC ID
 	RLCA				; TIMES 4
 	RLCA				; ... FOR 4 BYTE ENTRIES
 	LD	HL,FDCTBL		; POINT TO FDC INSTANCE TABLE
@@ -266,6 +260,8 @@ FDCSEL3:
 	LD	D,(HL)			; ...
 	LD	(FDCCFG),DE		; SAVE CFG PTR
 	LD	IY,(FDCCFG)		; AND INIT A WORKING COPY
+	LD	A,(IY+CFG_MODE)		; GET MODE BITMAP BYTE
+	LD	(FDCBM),A		; SAVE IT TO ACTIVE WORKING COPY
 ;
 	LD	DE,(FDCLBL)		; GET LABEL POINTER
 	CALL	WRITESTR		; AND DISPLAY IT
@@ -285,6 +281,7 @@ FDCTBL:	;	LABEL		CONFIG DATA
 	.DW	STR_N8,		CFG_N8
 	.DW	STR_RCSMC,	CFG_RCSMC
 	.DW	STR_RCWDC,	CFG_RCWDC
+	.DW	STR_SMZ80,	CFG_SMZ80
 FDCCNT	.EQU	($-FDCTBL)/4	; FD CONTROLLER COUNT
 ;
 ; FDC LABEL STRINGS
@@ -297,6 +294,7 @@ STR_DIDE	.TEXT	"D-IDE$"
 STR_N8		.TEXT	"N8$"
 STR_RCSMC	.TEXT	"RC-SMC$"
 STR_RCWDC	.TEXT	"RC-WDC$"
+STR_SMZ80	.TEXT	"SMZ80$"
 ;
 ; FDC CONFIGURATION BLOCKS
 ;
@@ -308,9 +306,28 @@ CFG_DCR		.EQU	4
 CFG_DACK	.EQU	5
 CFG_TC		.EQU	6
 CFG_DMA		.EQU	7
+CFG_MODE	.EQU	8
 ;
 CFG_DIO:
+	.DB	036H	; FDC MAIN STATUS REGISTER
+	.DB	037H	; FDC DATA PORT
+	.DB	038H	; DATA INPUT REGISTER
+	.DB	03AH	; DIGITAL OUTPUT REGISTER (LATCH)
+	.DB	0FFH	; DCR
+	.DB	0FFH	; DACK
+	.DB	0FFH	; TERMINAL COUNT (W/ DACK)
+	.DB	03CH	; PSEUDO DMA DATA PORT
+	.DB	_DIO	; MODE=
 CFG_DIO3:
+	.DB	036H	; FDC MAIN STATUS REGISTER
+	.DB	037H	; FDC DATA PORT
+	.DB	038H	; DATA INPUT REGISTER
+	.DB	03AH	; DIGITAL OUTPUT REGISTER (LATCH)
+	.DB	0FFH	; DCR
+	.DB	0FFH	; DACK
+	.DB	0FFH	; TERMINAL COUNT (W/ DACK)
+	.DB	03CH	; PSEUDO DMA DATA PORT
+	.DB	_DIO3	; MODE=
 CFG_ZETA:
 	.DB	036H	; FDC MAIN STATUS REGISTER
 	.DB	037H	; FDC DATA PORT
@@ -320,6 +337,7 @@ CFG_ZETA:
 	.DB	0FFH	; DACK
 	.DB	0FFH	; TERMINAL COUNT (W/ DACK)
 	.DB	03CH	; PSEUDO DMA DATA PORT
+	.DB	_ZETA	; MODE=
 ;
 CFG_ZETA2:
 	.DB	030H	; FDC MAIN STATUS REGISTER
@@ -330,6 +348,7 @@ CFG_ZETA2:
 	.DB	0FFH	; DACK
 	.DB	038H	; TERMINAL COUNT (W/ DACK)
 	.DB	0FFH	; NOT USED BY ZETA SBC V2
+	.DB	_PCAT	; MODE=
 ;
 CFG_DIDE:
 	.DB	02AH	; FDC MAIN STATUS REGISTER
@@ -340,6 +359,7 @@ CFG_DIDE:
 	.DB	03CH	; DACK
 	.DB	03DH	; TERMINAL COUNT (W/ DACK)
 	.DB	0FFH	; NOT USED BY DIDE
+	.DB	_PCAT	; MODE=
 ;
 CFG_N8:
 	.DB	08CH	; FDC MAIN STATUS REGISTER
@@ -350,6 +370,7 @@ CFG_N8:
 	.DB	090H	; DACK
 	.DB	093H	; TERMINAL COUNT (W/ DACK)
 	.DB	0FFH	; NOT USED BY N8
+	.DB	_PCAT	; MODE=
 ;
 CFG_RCSMC:
 	.DB	050H	; FDC MAIN STATUS REGISTER
@@ -360,6 +381,7 @@ CFG_RCSMC:
 	.DB	0FFH	; DACK
 	.DB	0FFH	; TERMINAL COUNT (W/ DACK)
 	.DB	0FFH	; PSEUDO DMA DATA PORT
+	.DB	_RCSMC	; MODE=
 ;
 CFG_RCWDC:
 	.DB	050H	; FDC MAIN STATUS REGISTER
@@ -370,6 +392,18 @@ CFG_RCWDC:
 	.DB	0FFH	; DACK
 	.DB	058H	; TERMINAL COUNT (W/ DACK)
 	.DB	0FFH	; PSEUDO DMA DATA PORT
+	.DB	_PCAT	; MODE=
+;
+CFG_SMZ80:
+	.DB	044H	; FDC MAIN STATUS REGISTER
+	.DB	045H	; FDC DATA PORT
+	.DB	0FFH	; DATA INPUT REGISTER
+	.DB	042H	; DIGITAL OUTPUT REGISTER (LATCH)
+	.DB	047H	; DCR
+	.DB	0FFH	; DACK
+	.DB	0FFH	; TERMINAL COUNT (W/ DACK)
+	.DB	0FFH	; PSEUDO DMA DATA PORT
+	.DB	_PCAT	; MODE=
 ;
 FDCID	.DB	0			; FDC IDENTIFIER (0 INDEXED)
 FDCBM	.DB	0			; FDC ID BITMAP
@@ -388,6 +422,7 @@ FSS_MENU:
 	.TEXT	"  (6) N8 Onboard FDC\r\n"
 	.TEXT	"  (7) RC2014 SMC (SMB)\r\n"
 	.TEXT	"  (8) RC2014 WDC (SMB)\r\n"
+	.TEXT	"  (9) SmallZ80 Expansion\r\n"
 	.TEXT	"=== OPTION ===> $\r\n"
 ;	
 ;===============================================================================
@@ -1464,7 +1499,8 @@ MD_MAP:
 		.DB	%00000001	; DIDE	POLL
 		.DB	%00000001	; N8	POLL
 		.DB	%00000001	; RCSMC	POLL
-		.DB	%00000001	; RCWDC	POLL
+;		.DB	%00000001	; RCWDC	POLL
+		.DB	%00000001	; SMZ80	POLL
 ;
 ; MEDIA DESCRIPTION BLOCK
 ;
@@ -1810,7 +1846,7 @@ FM_DRAW:
 	AND	_ZETA | _DIO3
 	JR	NZ,FM_DRAW0B
 	LD	A,(HL)
-	AND	_DIDE | _N8 | _ZETA2 | _RCWDC
+	AND	_PCAT
 	JR	NZ,FM_DRAW0C
 	LD	A,(HL)
 	AND	_RCSMC
@@ -1825,7 +1861,7 @@ FM_DRAW0B:	; ZETA, DIO3
 	LD	A,(FST_DOR)
 	AND	00000010B
 	JR	FM_DRAW1
-FM_DRAW0C:	; DIDE, N8, ZETA2, RCWDC
+FM_DRAW0C:	; DIDE, N8, ZETA2, RCWDC, SMZ80
 	LD	A,(FST_DOR)
 	AND	11110000B
 	JR	FM_DRAW1
@@ -1963,7 +1999,7 @@ FM_MOTOR:
 	AND	_ZETA | _DIO3
 	JR	NZ,FM_MOTOR0B
 	LD	A,(HL)
-	AND	_DIDE | _N8 | _ZETA2 | _RCWDC
+	AND	_PCAT
 	JR	NZ,FM_MOTOR0C
 	LD	A,(HL)
 	AND	_RCSMC
@@ -1978,7 +2014,7 @@ FM_MOTOR0B:	; ZETA, DIO3
 	LD	A,(FST_DOR)
 	AND	00000010B
 	JR	FM_MOTOR1
-FM_MOTOR0C:	; DIDE, N8, ZETA2, RCWDC
+FM_MOTOR0C:	; DIDE, N8, ZETA2, RCWDC, SMZ80
 	LD	A,(FST_DOR)
 	AND	11110000B
 	JR	FM_MOTOR1
@@ -2515,7 +2551,9 @@ FC_SETUPIO:
 	LD	(DE),A
 	INC	DE
 	
-	LD	A,(FCD_EOT)
+	; V5.3, USE EOT=R TO R/W ONLY ONE SECTOR
+	;LD	A,(FCD_EOT)
+	LD	A,(FCD_R)
 	LD	(DE),A
 	INC	DE
 	
@@ -2703,7 +2741,7 @@ FC_INIT:
 	AND	_ZETA | _DIO3
 	JR	NZ,FC_INIT2
 	LD	A,(HL)
-	AND	_DIDE | _N8 | _ZETA2 | _RCWDC
+	AND	_PCAT
 	JR	NZ,FC_INIT3
 	LD	A,(HL)
 	AND	_RCSMC
@@ -2715,7 +2753,7 @@ FC_INIT1:	; DIO
 FC_INIT2:	; ZETA, DIO3
 	LD	A,(FCD_DORB)
 	JR	FC_INIT5
-FC_INIT3:	; DIDE, N8, ZETA2, RCWDC
+FC_INIT3:	; DIDE, N8, ZETA2, RCWDC, SMZ80
 	LD	A,(FCD_DORC)
 	JR	FC_INIT5
 FC_INIT4:	; WDSMC
@@ -2747,7 +2785,7 @@ FC_RESETFDC:
 	AND	_ZETA | _DIO3 | _RCSMC
 	JR	NZ,FC_RESETFDC1
 	LD	A,(HL)
-	AND	_DIDE | _N8 | _ZETA2 | _RCWDC
+	AND	_PCAT
 	JR	NZ,FC_RESETFDC2
 	RET
 FC_RESETFDC1:	; ZETA, DIO3, RCSMC
@@ -2759,7 +2797,7 @@ FC_RESETFDC1:	; ZETA, DIO3, RCSMC
 	POP	AF
 	OUT	(C),A
 	JR	FC_RESETFDC3
-FC_RESETFDC2:	; DIDE, N8, ZETA2, RCWDC
+FC_RESETFDC2:	; DIDE, N8, ZETA2, RCWDC, SMZ80
 	LD	A,0
 	OUT	(C),A
 	LD	A,(FST_DOR)
@@ -2774,22 +2812,23 @@ FC_RESETFDC3:
 ; PULSE TERMCT TO TERMINATE ANY ACTIVE EXECUTION PHASE
 ;
 FC_PULSETC:
-	LD	A,(FDCBM)
-	AND	_DIDE | _N8 | _ZETA2 | _RCWDC
-	JR	NZ,FC_PULSETC1
-	; NOT DIDE, N8, ZETA2
-	LD	C,(IY+CFG_DOR)
-	LD	A,(FST_DOR)
-	SET	0,A
-	OUT	(C),A
-	RES	0,A
-	OUT	(C),A
-	JR	FC_PULSETC2
-FC_PULSETC1:	; DIDE, N8, ZETA2, RCWDC
-	LD	C,(IY+CFG_TC)
-	IN	A,(C)
-	JR	FC_PULSETC2
-FC_PULSETC2:
+	; V5.3, USE EOT=R TO R/W ONLY ONE SECTOR
+	;LD	A,(FDCBM)
+	;AND	_PCAT
+	;JR	NZ,FC_PULSETC1
+	;; NOT DIDE, N8, ZETA2, RCSMC, SMZ80
+	;LD	C,(IY+CFG_DOR)
+	;LD	A,(FST_DOR)
+	;SET	0,A
+	;OUT	(C),A
+	;RES	0,A
+	;OUT	(C),A
+	;JR	FC_PULSETC2
+;FC_PULSETC1:	; DIDE, N8, ZETA2, RCWDC, SMZ80
+	;LD	C,(IY+CFG_TC)
+	;IN	A,(C)
+	;JR	FC_PULSETC2
+;FC_PULSETC2:
 	RET
 ;
 ; SET FST_DOR FOR MOTOR CONTROL ON
@@ -2803,7 +2842,7 @@ FC_MOTORON:
 	AND	_ZETA | _DIO3
 	JR	NZ,FC_MOTORON2
 	LD	A,(HL)
-	AND	_DIDE | _N8 | _ZETA2 | _RCWDC
+	AND	_PCAT
 	JR	NZ,FC_MOTORON3
 	LD	A,(HL)
 	AND	_RCSMC
@@ -2817,7 +2856,7 @@ FC_MOTORON2:	; ZETA, DIO3
 	LD	HL,FST_DOR		; POINT TO FDC_DOR
 	SET	1,(HL)
 	JR	FC_MOTORON5
-FC_MOTORON3:	; DIDE, N8, ZETA2, RCWDC
+FC_MOTORON3:	; DIDE, N8, ZETA2, RCWDC, SMZ80
 	LD	HL,FST_DOR		; POINT TO FDC_DOR
 	LD	A,(HL)			; START WITH CURRENT DOR
 	AND	11111100B		; GET RID OF ANY ACTIVE DS BITS
@@ -2849,7 +2888,7 @@ FC_MOTORON5:
 	CALL	FC_SETDOR		; OUTPUT TO CONTROLLER
 	CALL	LDELAY			; WAIT 1/2 SEC ON MOTOR START FOR SPIN-UP
 	LD	A,(FDCBM)
-	AND	_DIDE | _N8 | _ZETA2 | _RCWDC
+	AND	_PCAT
 	RET	Z
 	LD	A,(FCD_DCR)
 	LD	C,(IY+CFG_DCR)
@@ -2867,7 +2906,7 @@ FC_MOTOROFF:
 	AND	_ZETA | _DIO3
 	JR	NZ,FC_MOTOROFF2
 	LD	A,(HL)
-	AND	_DIDE | _N8 | _ZETA2 | _RCWDC
+	AND	_PCAT
 	JR	NZ,FC_MOTOROFF3
 	LD	A,(HL)
 	AND	_RCSMC
@@ -2881,7 +2920,7 @@ FC_MOTOROFF2:	; ZETA, DIO3
 	LD	HL,FST_DOR		; POINT TO FDC_DOR
 	RES	1,(HL)
 	JR	FC_MOTOROFF5
-FC_MOTOROFF3:	; DIDE, N8, ZETA2, RCWDC
+FC_MOTOROFF3:	; DIDE, N8, ZETA2, RCWDC, SMZ80
 	LD	HL,FST_DOR		; POINT TO FDC_DOR
 	LD	A,DORC_INIT
 	LD	(HL),A
@@ -3120,8 +3159,10 @@ FOP_EVALST1:
 	JP	FOP_EXIT
 
 FOP_ENDCYL:
-	LD	A,FRC_ENDCYL
-	JP	FOP_SETFST
+	; V5.3, USE EOT=R TO R/W ONLY ONE SECTOR
+	;LD	A,FRC_ENDCYL
+	;JP	FOP_SETFST
+	JP	FOP_EXIT
 	
 FOP_DATAERR:
 	LD	A,FRC_DATAERR
@@ -3745,7 +3786,7 @@ DORB_BR500	.EQU	10100000B	; 500KBPS
 ;
 DORB_INIT	.EQU	DORB_BR250
 ;
-; *** DIDE/N8/ZETA2/RCWDC ***
+; *** DIDE/N8/ZETA2/RCWDC/SMZ80 ***
 ;
 DORC_INIT	.EQU	00001100B	; SOFT RESET INACTIVE, DMA ENABLED
 ;

Source/Apps/FDU/FDU.txt

@@ -1,9 +1,9 @@
 ================================================================
-Floppy Disk Utility (FDU) v5.1 for RetroBrew Computers 
-Disk IO / Zeta / Dual-IDE / N8
+Floppy Disk Utility (FDU) v5.3 for RetroBrew Computers 
+Disk IO / Zeta / Dual-IDE / N8 / RC2014 / SmallZ80
 ================================================================
 
-Updated December 16, 2017
+Updated September 5, 2018
 by Wayne Warthen (wwarthen@gmail.com)
 
 Application to test the hardware functionality of the Floppy 
@@ -74,6 +74,9 @@ supported:
  - Zeta 2
  - N8
  - Mark IV
+ - RC2014 w/ SMC
+ - RC2014 w/ WDC
+ - SmallZ80
 
 You must be using either a RomWBW or UBA based OS version.
 
@@ -85,13 +88,15 @@ You must have one of the following floppy disk controllers:
  - Zeta SBC onboard FDC
  - Zeta 2 SBC onboard FDC
  - N8 SBC onboard FDC
+ - RC2014 Scott Baker SMC-based Floppy Module
+ - RC2014 Scott Baker WDC-based Floppy Module
  
 Finally, you will need a floppy drive connected via an 
 appropriate cable:
 
 Disk IO - no twist in cable, drive unit 0/1 must be selected by jumper on drive
-DISK IO 3, Zeta, Zeta 2 - cable with twist, unit 0 after twist, unit 1 before twist
-DIDE, N8 - cable with twist, unit 0 before twist, unit 1 after twist
+DISK IO 3, Zeta, Zeta 2, RC2014 - cable with twist, unit 0 after twist, unit 1 before twist
+DIDE, N8, Mark IV, SmallZ80 - cable with twist, unit 0 before twist, unit 1 after twist
 
 Note that FDU does not utilize your systems ROM or OS to 
 access the floppy system.  FDU interacts directly with 
@@ -138,6 +143,16 @@ P5 (bd ID): 1-2, 3-4 (for $20-$3F port range)
 There are no specific N8 jumper settings, but the default
 I/O range starting at $80 is assumed in the published code.
 
+The RC2014 Scott Baker SMC-based floppy module should be jumpered
+for I/O base address 0x50 (SV1: 11-12), JP1 (TS) shorted,
+JP2 (/FAULT) shorted, JP3 (MINI): 2-3, JP4 (/DC/RDY): 2-3.
+
+The RC2014 Scott Baker WDC-based floppy module should be jumpered
+for I/O base address 0x50 (SV1: 11-12), JP1 (/DACK): 1-2,
+JP2 (TC): 2-3.
+
+SmallZ80 does not have any relevant jumper settings.  The 
+hardwired I/O ranges are assumed in the code.
 
 Modes of Operation
 ------------------
@@ -481,3 +496,12 @@ WW 1/8/2018: v5.2
 Added support for RC2014 hardware:
   - Scott Baker SMC 9266 FDC module
   - Scott Baker WDC 37C65 FDC module
+
+WW 9/5/2018: v5.3
+  - Removed use of pulsing TC to end R/W operations after one sector and
+    instead set EOT = R (sector number) so that after desired sector is
+    read, R/W stops with end of cylinder error which is a documented
+    method for controling number of sectors R/W.  This specific termination
+    condition is no longer considered an error, but a successful end of
+    operation.
+  - Added support for SmallZ80