Fix, Ok· | Intel 9800758-02 guide

BASIC-SO

Functions

The following program asks for a divisor and a dividend, and uses the error- trapping routine in lines 60-90 to prevent division by zero (which has code 11) from stopping the execution:

10 ON ERROR GOTO 60

20INPUT "WHAT ARE THE NUMBERS TO DIVIDE";X,Y

30Z = X/Y

40PRINT "QUOTIENT IS";Z

50GOTO 20

60IF ERR <> 11 OR ERL <> 30 THEN 90

70PRINT "YOU CAN'THAVE A DIVISOR OF ZERO!"

80RESUME 20

90ON ERROR GOTO 0

100END

RUN

WHAT ARE THE NUMBERS TO DIVIDE? ?045,9

QUOTIENT IS 5

WHAT ARE THE NUMBERS TO DIVIDE? 11,0

? 11,0

YOU CAN'THAVE A DIVISOR OF ZERO! WHAT ARE THE NUMBERS TO DIVIDE?

?

EXP

The function EXP returns the result of raising e (2.71828) to the specified power. The specified value must be less than 88.7, or overflow occurs. The calculation is performed in single precision.

EXP(expression)

10INPUT A

20B = EXP(A)

30PRINT B

40END

RUN ?5 148.4131 OK

?

FIX

The FIX function truncates numbers with decimal fractions to their integer value.

FIX (number)

PRINT FIX (41.99999) 41

Ok·

FRE

The FRE function returns the number of bytes of memory left when the dummy argument (X) is given. If you give a string variable as a dummy argument (X$), FRE returns the number of free bytes in string storage space.

FRE (X)I(X$)

PRINT FRE(X) 22490

Ok

7-5

Image 69

Intel 9800758-02 manual Fix, Ok·

Contents

BASIC-SO Reference Manual A108/0979/7500 FL Preface Page Contents Illustrations Invoking BASIC-80 Chapter Introduction to BASIC-80 Introduction to BASIC-80 ExamplesBasic filename MEMTOPaddress Filename Renaming a File Listing the Directory of a DiskChanging File Attributes Deleting a File Save LP ,A You can now run, list, or edit the program Statements Commands BASIC-80 Statements BASIC-80 Commands Contd BASIC-80 Functions BASIC-80 Statements Contd BASIC-80 Functions Contd Functions Representing Data Integer Constants ConstantsDecimal Integer Constants Hexadecimal Integer Constants Octal Integer Constants Single-Precision Floating-Point ConstantsDouble-Precision Floating-Point Constants String Variables String ConstantsThis is a string constant $ = Enter next data string YI,1 L4! = Csng l4 String Arrays BASIC-SO Operators in Order of Precedence Contd Arithmetic Operators String Operator Logical OperatorsNumeric Expressions String Expressions Entering and Editing Programs 30 A=8 30 A=8*5230 A=8*52 30 A=8*37 30 A--=8xx*522537 Control-R a = 8*37 Command 3D press 3, then D results SubcommandInteger D If AB then If AB then 120 Else Null SET At this point, the other editing subcommands may be used Syntax of the X subcommand is Integer C character character Print Undefined SET The E subcommand is enteredMove the cursor to PRINT. Enter 2C RE L Print Undefined SET. Enter a L BASIC-80 Error Messages Syntax Error MessagesOverflow, Underflow, and Divide-by-Zero Error Trapping Trace Facility Error Handling Error SimulationRestarting Program Execution If line 40 is replaced with Open 1,#1,F1DATES Opening a Sequential File Writing to a Sequential File Refer to for further details of Print UsingReading from a Sequential File If executed four times, it would read all eight values Value of R$ would be Closing a Sequential File Buffers Defining a Random 1/0 Field-FIELDField #3, 20 AS N$ Field #3, 20 AS N$, 9 AS SS$ Disk File Input/Output Reading from a Random 1/0 File Opening and Closing a Random Disk FileAny of the parameters can be variables To read the next record Integer Writing to a Random 1/0 FileSingle-precision value Double-precision value MKI$ Attrib Fdrive numberfilename, WO Attrib Fdrive numberfilename, W1Auto first lineJ, increment Clear expression,address Close Commands and Statements Rules for function name are the same as for variable name DEF FNX Defsng Defdbl Defstr Defint Delete DIM DIR ErrorEdit END Exit Error expressionField FOR-NEXT-STEP Gosub GETFor variable=expression to expression Step expression GET I file number ,record number IF-THEN-ELSE InputGoto LET KillLine Input List Load LSET, Rset NEW Merge 9 16 Next On ... Gosub On ... GotoOpen Option Base OUTPoke Print Using PrintString Fields If X$=SEVEN and Y$=EIGHT, the results of line 40 would be Numeric fields PUT Prun Read Randomize REM Return Resume RUN line numberlstring expression ,F SaveLine number RUN filename 60 END ? 5,8,2 TRON, Troff Width Wait ATN ABS CHR$ CintFunctions CVI CVS Csng10 A# = 1.00/3.00 AO/o = EOF Dskf Ok· FIX Hexs INPInputs INT InstrLEFT$ LOC LENLOF LOG MID$ MKI$ MKS$ MKD$OCT$ Peek expression RightsPOS integer RIGHT$ string,integer SIN SGNSpaces 10 a =1 SPC integer SPCIf A$ = 2 then Print Correct Else Goto SQRexpression STR$ expression TAB expressionTAN expression 60 AO/o = Here is an example of how the USRn statement is used Table A-I. BASIC-80 Error Codes Appendix a BASIC-SO Error Codes Table A-I. BASIC-SO Error Codes Contd Appendix B BASIC-SO Reserved Words Page Level To halt program execution and return to commandTo tab across the line To resume program execution after it is stopped byPage Appendix D Ascii Codes Table D-l. Ascii Code List BEL Table D-2. Ascii Code Definition Appendixe Calling Subroutines Figure B-1. Internal Representation of Numbers and Strings RESULT=USR%1VARPTRA, VARPTRB, VARPTRC» PRINTA+B+C= Result Some Real Examples Figure E-2 /8085 Assembly Language Program Figure E-3. PL/M-80 Program Appendix F RMX/SO BASIC-SO ISIS-II BASIC-SO Initializing the Predefined RMX/SO BASIC-SO Configuration OOOOH-OFFFH Table F-l. Sample Configuration Jumper Wiring BASIC-80 Source Files Generating Boot-Loaded and PROM-Based VersionsBASIC-80 Object Files BASIC-80 Executable Files Generating a Boot-Loaded RMX/80 BASIC-80 This option is used to allocate memory. It is 1 if the boot That are not boot loadedSetting baud rates, refer to the RMX/SO Users Guide This option enables your user-written I/O drivers if you ISBC 80/20-4 Generating a PROM-Based RMX/80 BASIC-80 Prom F1 RMX820.L1BSTART, & FOBASCM.OBJ,& FORMXBAS.LlB F1 DFSDIR. L1BDIRECTORY ,RENAM E,& F1 MTI810.L1B Adding BASIC-SO to an Existing RMX/SO Configuration Configuring DFS on an iSBC 80/10Configuration Requirements ISBC SO/10 System Clock Public Variables Open 0,#1, L1LlST Adding User-Written I/O Drivers to RMX/SO BASIC-SO Figure F-S. Sample User-Written 1/0 Driver Routine Burning a BASIC-80 Program Into Prom Altering BASIC-80 Workspace Baprom F1HEATER.BAS Page Index Ase BASIC-80 RIGHT$,7-1O Request for Readerscomments 111111