Intel 9800758-02 manual BASIC-80 Functions Contd

Language Elements BASIC-80

Table 2-3. BASIC-80 Functions (Cont'd.)

Functions	Returns	Example
DSKF	Number of 128-byte sectors free on disk or	DSKF(X)
	drive (X)
EOF	-1 if end-of-file; 0 if not (for file X).	A = EOF(X)
ERL	Line number of last error.	ERL
ERR	Error code of last error.	ERR
EXP	e to the (X)th power.	EXP (X)
FIX	Integer value of (X).	FIX (X)
FRE	Number of bytes in memory (X) or number of	FRE (X)
	bytes in string space (X$)
HEX$	String equal to hex value of (X%)	HEX$(X%)
INP	Reads a byte from port (X)	INP(X)
INPUT$	Inputs (X) characters from file (Y)	INPUT$ (X, Y)
INSTR$	Position of (X$) within (Y$)	INSTR$ (X$, Y$)
INT	Integer value of (X)	INT(X)
LEFT$	Leftmost (X) characters of (A$)	LEFT$ (A$, X)
LEN	Character length of (X$)	LEN (X$)
LOC	Current record number in random file X.	LOC (X)
	Sectors read or written since last OPEN in se-
	quential file X.
LOF	Number of records in random file X. Number of	LOF (X)
	data sectors in sequential file X.
LOG	Natural log of (X)	LOG (X)
MID$	J characters, starting at I, of string A$	MID$ (A$, I, J)
MKD$	B-byte string equal to double-precision	MKD$ (A$)
	floating-point variable (X!)
MKI$	2-byte string equal to integer variable (X%)	MKI$ (A$)
MKS$	4-byte string equal to single-precision	MKS$(A$)
	floating-point variable (X!)
OCT$	Octal equivalent of decimal argument	OCT$(X)
PEEK	Single byte from memory location (X)	PEEK (X)
POS	Position of cursor after last PRINT.	POS (dummy argument)
RIGHT$	Rightmost (1%) characters of X$	RIGHT$ (X$, 1%)
RND	Single-precision random number between 0	RND
	and 1.
SGN	Sign of (X)	SGN (X)
SIN	Sine of (X)	SIN (X)
SPACES	String of (1%) spaces	SPACE$(I%)
SPC	String of (X%) spaces	SPC(X%)
SQR	Square root of (X)	SQR (X)
STR$	String equal to (X)	STR$ (X)
STRING$	Character X, Y% times-or the first character	STRING$ (Y%, X)
	of A$, Y% times.	STRING$ (Y%, A$)
TAB	Spaces to (X) position on terminal	TAB (X)
TAN	Tangent value of (X)	TAN (X)
USR	References user subroutine 0 to 24	AX = USR 12 (A1, A2)
VAL	Numerical value of (X$)	VAL (X$)
VARPTR	Memory address of (X)	VARPTR(X)

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