Intel 9800758-02 manual Listing the Directory of a Disk, Renaming a File, Changing File Attributes

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BASIC-SO

Introduction to BASIC-SO

Listing the Directory of a Disk

To list the directory of a disk, enter DIR followed by the drive number. BASIC-80 assumes drive 0 if you don't specify:

DIR
NAME.EXT	RECS	LENGTH	ATTR
ALPHA	31	3728
ATTRIB	38	4677
BASIC	178	22571
COpy	64	7967
DCOPY	32	3961
DELETE	37	4501
DIR	46	5728
DSORT	11	1264
EDIT .MAC	5	469
INDEX .I	46	5669
NED	79	469
RENAME	21	2438

Renaming a File

The RENAME command lets you change the name of any file from an old filename to a new filename. The directory listing also changes to the new filename. In the ex- ample below, file :FI:PROG changes to :FI:MYPROG:

RENAME ":F1 :PROG" to ":F1 :MYPROG"

Changing File Attributes

With the BASIC-80 ATTRIB command, you can protect a file from overwriting, deletion, or being renamed by setting the write-protect attribute "W" . If you set the invisibility attribute, "I", the file will not appear when the directory is listed. If you set the format attribute, "F", the file will copy to a disk formatted with the IDISK or FORMAT commands. The system attribute, "S", makes the specified file copy to a disk when the disk is formatted by the FORMAT command or copied with the COPY command.

For each attribute, the format is "XO" if the attribute is disabled, "Xl" if it is enabled, where X is either W, I, S, or F. The format of ATTRIB is:

ATTRIB "filename", "XO"I"X1"

Deleting a File

If you want to get rid of a file or program, you can use the KILL command to delete it and remove its listing from the directory. Once a file or program has been killed, it cannot be recovered. The format of the KILL command is KILL followed by the filename in quotation marks. For example, to delete a file named ANLYZ on the disk in drive 1, enter:

KILL ":F1 :ANLYZ"

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Contents BASIC-SO Reference Manual A108/0979/7500 FL Preface Page Contents Illustrations Invoking BASIC-80 Chapter Introduction to BASIC-80Introduction to BASIC-80 ExamplesBasic filename MEMTOPaddress FilenameRenaming a File Listing the Directory of a DiskChanging File Attributes Deleting a FileSave LP ,A You can now run, list, or edit the programStatements CommandsBASIC-80 Statements BASIC-80 Commands ContdBASIC-80 Functions BASIC-80 Statements ContdBASIC-80 Functions Contd Functions Representing DataInteger Constants ConstantsDecimal Integer Constants Hexadecimal Integer ConstantsOctal Integer Constants Single-Precision Floating-Point ConstantsDouble-Precision Floating-Point Constants String Variables String ConstantsThis is a string constant $ = Enter next data stringYI,1 L4! = Csng l4String Arrays BASIC-SO Operators in Order of Precedence Contd Arithmetic OperatorsString Operator Logical OperatorsNumeric Expressions String ExpressionsEntering 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*37Command 3D press 3, then D results SubcommandInteger D If AB thenIf AB then 120 Else Null SET At this point, the other editing subcommands may be used Syntax of the X subcommand isInteger C character character Print Undefined SET The E subcommand is enteredMove the cursor to PRINT. Enter 2C RE L Print Undefined SET. Enter a LBASIC-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 withOpen 1,#1,F1DATES Opening a Sequential FileWriting 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 valuesValue of R$ would be Closing a Sequential FileBuffers Defining a Random 1/0 Field-FIELDField #3, 20 AS N$ Field #3, 20 AS N$, 9 AS SS$ Disk File Input/OutputReading from a Random 1/0 File Opening and Closing a Random Disk FileAny of the parameters can be variables To read the next recordInteger Writing to a Random 1/0 FileSingle-precision value Double-precision valueMKI$ Attrib Fdrive numberfilename, WO Attrib Fdrive numberfilename, W1Auto first lineJ, increment Clear expression,addressClose Commands and StatementsRules for function name are the same as for variable name DEF FNXDefsng Defdbl Defstr Defint Delete DIMDIR ErrorEdit ENDExit Error expressionField FOR-NEXT-STEPGosub GETFor variable=expression to expression Step expression GET I file number ,record numberIF-THEN-ELSE InputGoto LET KillLine Input ListLoad LSET, RsetNEW Merge9 16 NextOn ... Gosub On ... GotoOpen Option Base OUTPoke Print Using PrintString Fields If X$=SEVEN and Y$=EIGHT, the results of line 40 would be Numeric fieldsPUT PrunRead RandomizeREM Return ResumeRUN line numberlstring expression ,F SaveLine number RUN filename 60 END? 5,8,2 TRON, TroffWidth WaitATN ABSCHR$ CintFunctions CVI CVS Csng10 A# = 1.00/3.00 AO/o =EOF DskfOk· FIXHexs INPInputs INT InstrLEFT$ LOC LENLOF LOGMID$ MKI$ MKS$ MKD$OCT$ Peek expression RightsPOS integer RIGHT$ string,integerSIN SGNSpaces 10 a =1SPC integer SPCIf A$ = 2 then Print Correct Else Goto SQRexpressionSTR$ expression TAB expressionTAN expression 60 AO/o = Here is an example of how the USRn statement is usedTable A-I. BASIC-80 Error Codes Appendix a BASIC-SO Error CodesTable 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 ListBEL Table D-2. Ascii Code DefinitionAppendixe Calling Subroutines Figure B-1. Internal Representation of Numbers and Strings RESULT=USR%1VARPTRA, VARPTRB, VARPTRC» PRINTA+B+C= Result Some Real ExamplesFigure 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 ConfigurationOOOOH-OFFFH Table F-l. Sample Configuration Jumper WiringBASIC-80 Source Files Generating Boot-Loaded and PROM-Based VersionsBASIC-80 Object Files BASIC-80 Executable FilesGenerating 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 youISBC 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 ClockPublic Variables Open 0,#1, L1LlST Adding User-Written I/O Drivers to RMX/SO BASIC-SOFigure F-S. Sample User-Written 1/0 Driver Routine Burning a BASIC-80 Program Into Prom Altering BASIC-80 WorkspaceBaprom F1HEATER.BAS Page Index Ase BASIC-80 RIGHT$,7-1O Request for Readerscomments 111111