Update usbfifo.asm

Cleanup

Source/HBIOS/usbfifo.asm

@@ -1,13 +1,29 @@
+;==================================================================================================
+;	ECB USB-FIFO DRIVER FOR WILL SOWERBUTTS ADAFRUIT BASED FT232H ECB-FIFO BOARD
+;	REFER https://www.retrobrewcomputers.org/doku.php?id=boards:ecb:usb-fifo:start
+;	PHIL SUMMERS (b1ackmai1er)
+;==================================================================================================
+;
+;	BASE PORT IS SET IN PLT_SBC.INC
+;	INTERRUPTS ARE NOT USED.
+;	ONLY ONE BOARD SUPPORTED.
+;
+;	HBIOS CALLS:
+;
+;	UF_PREINIT	SETUP THE DISPATCH TABLE ENTRY AND INITIALIZE HARDWARE	
+;	UF_INIT		ANNOUNCE DEVICE DESCRIPTION AND PORT
+;
 FIFO_DATA       .EQU	(FIFO_BASE+0)
 FIFO_STATUS     .EQU	(FIFO_BASE+1)
 FIFO_SEND_IMM   .EQU	(FIFO_BASE+2)
 ;
-;==================================================================================================
+; DEVICE DESCRIPTION TABLE
 ;
-UF_PREINIT:
+UF_CFG:	.DW	DEFSIOACFG		; DUMMY CONFIGURATION
 ;
-; SETUP THE DISPATCH TABLE ENTRY
+; SETUP THE DISPATCH TABLE ENTRY AND INITIALIZE HARDWARE
 ;
+UF_PREINIT:
 	LD	HL,UF_CFG		; POINT TO START OF CFG TABLE
 	PUSH	HL			; COPY CFG DATA PTR
 	PUSH	HL
@@ -30,19 +46,17 @@ UF_INITUNIT:
 	LD	DE,-1			; LEAVE CONFIG ALONE
 	JR	UF_INITDEV		; IMPLEMENT IT AND RETURN
 ;
-;
+; ANNOUNCE DEVICE DESCRIPTION AND PORT
 ;
 UF_INIT:
-	LD	HL,UF_CFG		; POINT TO START OF CFG TABLE
-	PUSH	HL			; COPY CFG DATA PTR
-	POP	IY			; ... TO IY
-;
-	LD	A,1			; SET TYPE
-	OR	A			; SET FLAGS
-	CALL	NZ,UF_PRTCFG		; PRINT IF NOT ZERO
+	CALL	NEWLINE			; PRINT DEVICE
+	PRTS("USB-FIFO: $")
+	PRTS("IO=0x$")
+	LD	A,FIFO_BASE
+	CALL	PRTHEXBYTE		; PRINT PORT
+	RET
 ;
-	XOR	A			; SIGNAL SUCCESS
-	RET				; DONE
+; INPUT A CHARACTER AND RETURN IT IN E
 ;
 UF_IN:
 	CALL	UF_IST			; CHAR WAITING?
@@ -62,7 +76,7 @@ UF_OUT:
 	XOR	A			; SIGNAL SUCCESS
 	RET
 ;
-; INPUT STATUS - CAN WE SEND A CHARACTERV
+; INPUT STATUS - CAN WE SEND A CHARACTER
 ;
 UF_IST:
 	IN	A,(FIFO_STATUS)		; IS THE QUEUE EMPTY?
@@ -81,7 +95,7 @@ UF_OST:
 ;
 ; INITIALIZATION THE SETUP PARAMETER WORD AND INITIALIZE DEVICE
 ; SAVE NEW SPW IF NOT A RE-INIT. ALWAYS INITIALIZE DEVICE.
-; SPW IS NOT VAIDATED BUT IT IS USED FOR ANYTHING.
+; SPW IS NOT VAIDATED BUT IT IS NOT USED FOR ANYTHING.
 ;
 UF_INITDEV:
 ;
@@ -91,30 +105,27 @@ UF_INITDEV:
 	INC	A			; ... SO Z SET IF -1
 	JR	NZ,UF_INITDEV1		; IF DE == -1, REINIT CURRENT CONFIG
 ;
-	; GET CURRENT PSW BECAUSE WE ALWAYS RESAVE AT END
+	; GET CURRENT PSW. WE ALWAYS RESAVE AT END
 	LD	E,(IY+0)		; LOW BYTE
 	LD	D,(IY+1)		; HIGH BYTE	
 ;
 UF_INITDEV1:
 	XOR	A			; INTERRUPTS OFF
-	OR	00110000B
 	OUT	(FIFO_STATUS),A
-
+;
 UF_FLUSH:
 	IN	A,(FIFO_STATUS)		; IS THERE ANY DATA
 	RLCA				; IN THE BUFFER ?
 	JR	C,UFBUFEMPTY		; EXIT IF EMPTY
-
+;
 	IN	A,(FIFO_DATA)		; CLEAR BUFFER BY READING
 	JR	UF_FLUSH		; ALL THE DATA
 UFBUFEMPTY:
-
 	LD	(IY + 0),E		; SAVE LOW WORD
 	LD	(IY + 1),D		; SAVE HI WORD
-
 	RET				; NZ STATUS HERE INDICATES FAIL.
 ;
-;	USB-FIFO WILL A SERIAL DEVICE AT DEFAULT SERIAL MODE
+;	USB-FIFO WILL APPEAR AS A SERIAL DEVICE AT DEFAULT SERIAL MODE
 ;
 UF_QUERY:
 	LD	E,(IY+0)		; FIRST CONFIG BYTE TO E
@@ -137,18 +148,6 @@ UF_DETECT:
 	LD	A,1			; 0 = NONE
 	RET
 ;
-; ANNOUNCE DEVICE DESCRIPTION AND PORT
-;
-UF_PRTCFG:
-	CALL	NEWLINE
-	PRTS("USB-FIFO: IO=0x$")	; PRINT DEVICE
-
-	LD	A,FIFO_BASE
-	CALL	PRTHEXBYTE		; PRINT PORT
-;
-	XOR	A
-	RET
-;
 ; DRIVER FUNCTION TABLE
 ;
 UF_FNTBL:
@@ -163,16 +162,3 @@ UF_FNTBL:
 	.ECHO	"*** INVALID SIO FUNCTION TABLE ***\n"
 #ENDIF
 ;
-; DEVICE DESCRIPTION
-;
-UF_TYPE_MAP:
-		.DW	UF_STR_NONE
-		.DW	UF_STR_UF
-
-UF_STR_NONE	.DB	"<NOT PRESENT>$"
-UF_STR_UF	.DB	"USB-FIFO$"
-;
-; DEVICE DESCRIPTION TABLE
-;
-UF_CFG:	.DW	DEFSIOACFG		; LINE CONFIGURATION
-;