BBC BASIC for Windows

BBC BASIC for SDL 2.0

Reference information

Table of ASCII codes

Binary	Hex	Dec	Char
00100000	&20	32	Space
00100001	&21	33	!
00100010	&22	34	"
00100011	&23	35	#
00100100	&24	36	$
00100101	&25	37	%
00100110	&26	38	&
00100111	&27	39	'
00101000	&28	40	(
00101001	&29	41	)
00101010	&2A	42	*
00101011	&2B	43	+
00101100	&2C	44	,
00101101	&2D	45	-
00101110	&2E	46	.
00101111	&2F	47	/
00110000	&30	48	0
00110001	&31	49	1
00110010	&32	50	2
00110011	&33	51	3
00110100	&34	52	4
00110101	&35	53	5
00110110	&36	54	6
00110111	&37	55	7
00111000	&38	56	8
00111001	&39	57	9
00111010	&3A	58	:
00111011	&3B	59	;
00111100	&3C	60	<
00111101	&3D	61	=
00111110	&3E	62	>
00111111	&3F	63	?
01000000	&40	64	@
01000001	&41	65	A
01000010	&42	66	B
01000011	&43	67	C
01000100	&44	68	D
01000101	&45	69	E
01000110	&46	70	F
01000111	&47	71	G
01001000	&48	72	H
01001001	&49	73	I
01001010	&4A	74	J
01001011	&4B	75	K
01001100	&4C	76	L
01001101	&4D	77	M
01001110	&4E	78	N
01001111	&4F	79	O
01010000	&50	80	P
01010001	&51	81	Q
01010010	&52	82	R
01010011	&53	83	S
01010100	&54	84	T
01010101	&55	85	U
01010110	&56	86	V
01010111	&57	87	W
01011000	&58	88	X
01011001	&59	89	Y
01011010	&5A	90	Z
01011011	&5B	91	[
01011100	&5C	92	\
01011101	&5D	93	]
01011110	&5E	94	^
01011111	&5F	95	_
01100000	&60	96	`
01100001	&61	97	a
01100010	&62	98	b
01100011	&63	99	c
01100100	&64	100	d
01100101	&65	101	e
01100110	&66	102	f
01100111	&67	103	g
01101000	&68	104	h
01101001	&69	105	i
01101010	&6A	106	j
01101011	&6B	107	k
01101100	&6C	108	l
01101101	&6D	109	m
01101110	&6E	110	n
01101111	&6F	111	o
01110000	&70	112	p
01110001	&71	113	q
01110010	&72	114	r
01110011	&73	115	s
01110100	&74	116	t
01110101	&75	117	u
01110110	&76	118	v
01110111	&77	119	w
01111000	&78	120	x
01111001	&79	121	y
01111010	&7A	122	z
01111011	&7B	123	{
01111100	&7C	124	|
01111101	&7D	125	}
01111110	&7E	126	~
01111111	&7F	127	DEL Delete

Mathematical functions

Function	Definition(s)
SECANT
	DEF FNSEC(X)=1/COS(X)
COSECANT
	DEF FNCSC(X)=1/SIN(X)
COTANGENT
	DEF FNCOT(X)=1/TAN(X)
Inverse SECANT
	DEF FNARCSEC(X)=ACS(1/X)
Inverse COSECANT
	DEF FNARCCSC(X)=ASN(1/X)
Inverse COTANGENT
	DEF FNARCCOT(X)=ATN(1/X) DEF FNARCCOT(X)=PI/2-ATN(X)
Hyperbolic SINE
	DEF FNSINH(X)=(EXP(X)-EXP(-X))/2
Hyperbolic COSINE
	DEF FNCOSH(X)=(EXP(X)+EXP(-X))/2
Hyperbolic TANGENT
	DEF FNTANH(X)=EXP(-X)/(EXP(X)+EXP(-X))*2+1
Hyperbolic SECANT
	DEF FNSECH(X)=2/(EXP(X)+EXP(-X))
Hyperbolic COSECANT
	DEF FNCSCH(X)=2/(EXP(X)-EXP(-X))
Hyperbolic COTANGENT
	DEF FNCOTH(X)=EXP(-X)/(EXP(X)-EXP(-X))*2+1
Inverse Hyperbolic SIN
	DEF FNARCSINH(X)=LN(X+SQR(X*X+1))
Inverse Hyperbolic COSINE
	DEF FNARCCOSH(X)=LN(X+SQR(X*X-1))
Inverse Hyperbolic TANGENT
	DEF FNARCTANH(X)=LN((1+X)/(1-X))/2
Inverse Hyperbolic SECANT
	DEF FNARCSECH(X)=LN((SQR(-X*X+1)+1)/X)
Inverse Hyperbolic COSECANT
	DEF FNARCCSCH(X)=LN((SGN(X)*SQR(X*X+1)+1)/X
Inverse Hyperbolic COTANGENT
	DEF FNARCCOTH(X)=LN((X+1)/(X-1))/2
LOGn(X)
	DEF FNLOG(N,X)=LN(X)/LN(N) DEF FNLOG(N,X)=LOG(X)/LOG(N)

Keyword tokens

Token	Keyword
&80	AND
&81	DIV
&82	EOR
&83	MOD
&84	OR
&85	ERROR
&86	LINE
&87	OFF
&88	STEP
&89	SPC
&8A	TAB( 3
&8B	ELSE
&8C	THEN
&8D	line number 1
&8E	OPENIN
&8F	PTR (right) 2
&90	PAGE (right) 2
&91	TIME (right) 2
&92	LOMEM (right) 2
&93	HIMEM (right) 2
&94	ABS
&95	ACS
&96	ADVAL
&97	ASC
&98	ASN
&99	ATN
&9A	BGET
&9B	COS
&9C	COUNT
&9D	DEG
&9E	ERL
&9F	ERR
&A0	EVAL
&A1	EXP
&A2	EXT
&A3	FALSE
&A4	FN
&A5	GET
&A6	INKEY
&A7	INSTR( 3
&A8	INT
&A9	LEN
&AA	LN
&AB	LOG
&AC	NOT
&AD	OPENUP
&AE	OPENOUT
&AF	PI
&B0	POINT( 3
&B1	POS
&B2	RAD
&B3	RND
&B4	SGN
&B5	SIN
&B6	SQR
&B7	TAN
&B8	TO 4
&B9	TRUE
&BA	USR
&BB	VAL
&BC	VPOS
&BD	CHR$
&BE	GET$
&BF	INKEY$
&C0	LEFT$( 3
&C1	MID$( 3
&C2	RIGHT$( 3
&C3	STR$
&C4	STRING$( 3
&C5	EOF
&C6	SUM
&C7	WHILE
&C8	CASE
&C9	WHEN
&CA	OF
&CB	ENDCASE
&CC	OTHERWISE
&CD	ENDIF
&CE	ENDWHILE
&CF	PTR (left) 2
&D0	PAGE (left) 2
&D1	TIME (left) 2
&D2	LOMEM (left) 2
&D3	HIMEM (left) 2
&D4	SOUND
&D5	BPUT
&D6	CALL
&D7	CHAIN
&D8	CLEAR
&D9	CLOSE
&DA	CLG
&DB	CLS
&DC	DATA
&DD	DEF
&DE	DIM
&DF	DRAW
&E0	END
&E1	ENDPROC
&E2	ENVELOPE
&E3	FOR
&E4	GOSUB
&E5	GOTO
&E6	GCOL
&E7	IF
&E8	INPUT
&E9	LET
&EA	LOCAL
&EB	MODE
&EC	MOVE
&ED	NEXT
&EE	ON
&EF	VDU
&F0	PLOT
&F1	PRINT
&F2	PROC
&F3	READ
&F4	REM
&F5	REPEAT
&F6	REPORT
&F7	RESTORE
&F8	RETURN
&F9	RUN
&FA	STOP
&FB	COLOUR5
&FC	TRACE
&FD	UNTIL
&FE	WIDTH
&FF	OSCLI
&00	reserved
&01	CIRCLE
&02	ELLIPSE
&03	FILL
&04	MOUSE
&05	ORIGIN
&06	QUIT
&07	RECTANGLE
&08	SWAP
&09	SYS
&0A	TINT
&0B	WAIT
&0C	INSTALL
&0D	end of line
&0E	PRIVATE
&0F	BY
&10	EXIT
&11	spare
&12	spare
&13	spare
&14	spare
&15	spare
&16	spare
&17	spare
&18	reserved (fast FN/PROC) 6
&19	reserved (fast byte) 6
&1A	reserved (fast dword) 6
&1B	reserved (fast double) 6
&1C	reserved (fast variant) 6
&1D	reserved (fast structure) 6
&1E	reserved (fast qword) 6
&1F	reserved (fast string) 6

1. Token value &8D doesn't represent a keyword, but marks the presence of an encoded line number (e.g. following a GOTO, GOSUB or RESTORE).

2. The pseudo-variables PTR, PAGE, TIME, LOMEM and HIMEM each have two tokens, depending on whether they are being written (i.e. to the left of an equals sign) or read (to the right of an equals sign).

3. The tokens for TAB, INSTR, POINT, LEFT$, MID$, RIGHT$ and STRING$ include the opening bracket; there cannot be a space between the keyword and the bracket.

4. The keyword TOP does not have a token. It is represented by the token for TO followed by a P.

5. Both COLOUR and COLOR are accepted, but the token is always listed as COLOUR.

6. These tokens are used internally by the compiler and run-time-engine. They should not normally appear in a saved BASIC program.

CONTENTS

CONTINUE