Update vdu.asm

Removed a hack in VDU driver that has existed for 8 years.  :-)

Source/HBIOS/vdu.asm

@@ -461,21 +461,13 @@ VDU_BLKCPY:
     	LD 	A,31		; PREP VDU FOR DATA R/W
     	OUT 	(VDU_REG),A	; DO IT
 	LD	HL,VDU_BUF	; HL POINTS TO WORK BUFFER
-;	LD	C,VDU_RAMWR	; LOAD C WITH VDU WRITE REGISTER
+	LD	C,VDU_RAMRD	; LOAD C WITH VDU READ REGISTER
 
 VDU_BLKCPY1:	; VIDEO RAM -> BUFFER COPY LOOP
 	CALL	VDU_WAITRDY	; WAIT FOR VDU
-;;;;;;;;;;;;;;;;;
-; INI IS NOT WORKING FOR ME, GARBAGE DATA READS, NO IDEA WHY
-;	INI			; READ BYTE, DEC B, INC HL
-;	IN	A,(VDU_DATA)	; BOGUS READ TO INCREMENT VDU RAM ADDRESS!!!
-;	JR	NZ,VDU_BLKCPY1	; LOOP TILL DONE
-;;;;;;;;;;;;;;;;;
-	IN	A,(VDU_RAMRD)	; READ DATA BYTE
-	LD	(HL),A		; SAVE IN BUFFER
-	INC	HL		; BUMP SOURCE ADDRESS
+	INI			; READ BYTE, DEC B, INC HL
 	IN	A,(VDU_DATA)	; BOGUS READ TO INCREMENT VDU RAM ADDRESS!!!
-	DJNZ	VDU_BLKCPY1	; LOOP TILL DONE
+	JR	NZ,VDU_BLKCPY1	; LOOP TILL DONE
 
 	; SETUP TO COPY FROM WORK BUFFER TO VDU DEST
 	POP	BC		; RECOVER THE COPY LENGTH