S P E C T R U M    

                       [  S O F T R O M  ]

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	HEXADECIMAL NOTATION FOR THE SPECTRUM WITH SOFT-ROM
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Format for use :-

The symbol '&' is placed before the hexadecimal number and 
the Spectrum will then accept it as a valid number in
circumstance where a number is expected by the syntax check.
	e.g.    PRINT &FA + &A/200
	SAVE "NAME" C0DE &EO1B,&A2C

 1      ENTRY 		ORG	#3870
 2			CP 	#C4		Test for BIN
 3			JR	NZ,NOTBIN	Jump if no
 4			JP	#2C9F		yes, do BIN
 5	NOTBIN		CP 	#26		test for "&"
 6			JP 	NZ,#2CB8	no, then do number
 7
 8			LD	DE,#0		Clear previous data
 9			LD	(#FFFE),DE	from spare location
10			LD	HL,#2CB3	Preset stack for
11			PUSH	HL		return
12
13	HEXCONV		RST	#20		Get next character
14			CALL 	TEST		Go test for valid
15			RET	NC		HEX digit. NC = error
16			LD	HL,#FFFE	Now do HEX conversion
17			RLD			going round the loop
18			LD	E,(HL)		until a non-HEX digit
19			INC	HL		is found.
20			RLD			Exit with decimal 
21			LD	D,(HL)		number in DE
22			JR	HEXCONV
23
24 	TEST		CALL	#2D1B		Test for number
25			JR	NC,NUMBER	NC = number OK
26			CALL	#2C8D		Test for letter
27			RET 	NC		NC = error
28			AND 	#DF		convert to upper case
29			CP	#47		Test for 'G' upwards
30			RET 	NC		NC = error
31			SUB	#7		Convert from ASCII to 
32	NUMBER		SUB	#30		decimal
33			SCF			Return with carry set
34			RET			to flag OK.
35 	; ROM PATCHES
36			ORG	#2C9B
37			JP	#3870		Jump to HEX routine
38			ORG	#267B		Use 'POINT' routine 
39			JR	#2C8D		to jump to number
40			ORG	#25AC		
41			DEFB	#26		Change 'point' to '&'


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