Intel 9800758-02 manual ISBC 80/20-4

Page 99

BASIC-SO

RMX/SO BASIC-SO

After you modify BQOPS.ASM and verify the contents of the BOOTCM.ASM and BQBMEM.ASM modules, you are ready to generate your boot loader. To do this, you must assemble BOOTCM.ASM and BQBMEM.ASM, and LINK and LOCATE the resultant object code. The GBOOT.CSD module will do this with the SUBMIT command. Figure F-2 is a listing of the GBOOT.CSD module used with the BQOPS.ASM module in figure F-l.

The DATA location and the BOTMEM address must be the same. If your hardware configuration uses an iSBC SO/20 or iSBC S0/10, each occurrence of S30 should be changed to S20 or SID. After you have generated the boot loader, it should be burned into PROM and inserted into your CPU board. (See the Universal PROM Programming Manual for details)

The iSBC SO/10 does not have an onboard clock. If your configuration includes a clock, add the appropriate routines when linking GBOOT.CSD. (Refer to Appendix G of the RMX/80 User's Guide for further information.) If you don't have a clock in your configuration, include the dummy clockroutine CLOCK.OBJ.

ASM80

:FO:BOOTCM.ASM MACROFILE(:FO:)

NOSYMBOLS

ASM80

:FO:BQBMEM.ASM MACROFILE(:FO:)

NOSYMBOLS

LINK

:F1 :BOT830.LlB(VECRST)

 

 

:F1 :RMX830.LlB(START)

 

 

:FO:BOOTCM.OBJ,

&

 

 

:FO:BQBMEM.OBJ,

&

 

 

:F1 :BOT830. LIB,

&

 

 

:F1 :DI0830.LlB,

&

 

 

:F1 :DFSUNR.LlB,

&

 

 

:F1 :RMX830.LlB,

&

 

 

:F1 :BOTUNR.LlB,

&

 

 

:FO:PLM80.LlB

TO :F1:BQBOOT.LNK MAP PRINT(:F1:LNK.LST)

LOCATE :F1 :BQ800T.LNK TO :FO:BQBOOT MAP PUBLICS PRINT(:F1 :LOC.LST)& CODE(40H) DATA(OFD40H) STACKSIZE(O)

Figure F-2. Sample Configuration OBOOT.CSD Module

Generating a Boot-Loadable BASIC-80. Once you have determined how to generate the boot loader that fits your particular RMX/SO implementation, the bulk of your work is over. Generating BASIC-SO is relatively simple.

There are four steps to generating a boot loadable RMX/80 BASIC-80: assembling the BASCM.ASM and BQMEM.ASM modules, and linking and locating the resulting BASIC-SO into RMXSYS. The GBASIC.CSD module is a SUBMIT file that performs these steps. Figure F-3 shows a listing of the GBASIC.CSD module used with the sample configuration. If you are using an iSBC 80/10 or iSBC SO/20 based system, you need to modify the "S30" references in the module to "SI0" or "S20" with the ISIS-II Text Editor. For further information about using the Text Editor, refer to the ISIS-II User's Guide.

The CODE and START addresses should reflect the addresses at the start of system RAM. The following list shows typical starting addresses:

iSBC80/10or80/10-A

3COOH

iSBC 80/20

3800H

iSBC 80/20-4

3000H

iSBC 80/30

4000H

F-7

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Contents BASIC-SO Reference Manual A108/0979/7500 FL Preface Page Contents Illustrations Invoking BASIC-80 Chapter Introduction to BASIC-80Filename ExamplesIntroduction to BASIC-80 Basic filename MEMTOPaddressDeleting a File Listing the Directory of a DiskRenaming a File Changing File AttributesSave 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 DataHexadecimal Integer Constants ConstantsInteger Constants Decimal Integer ConstantsOctal Integer Constants Single-Precision Floating-Point ConstantsDouble-Precision Floating-Point Constants $ = Enter next data string String ConstantsString Variables This is a string constantYI,1 L4! = Csng l4String Arrays BASIC-SO Operators in Order of Precedence Contd Arithmetic OperatorsString Expressions Logical OperatorsString Operator Numeric ExpressionsEntering and Editing Programs 30 A--=8xx*522537 Control-R a = 8*37 30 A=8*5230 A=8 30 A=8*52 30 A=8*37If AB then SubcommandCommand 3D press 3, then D results Integer DIf AB then 120 Else Null SET At this point, the other editing subcommands may be used Syntax of the X subcommand isPrint Undefined SET. Enter a L Print Undefined SET The E subcommand is enteredInteger C character character Move the cursor to PRINT. Enter 2C RE LBASIC-80 Error Messages Syntax Error MessagesOverflow, Underflow, and Divide-by-Zero Error Trapping Trace Facility If line 40 is replaced with Error SimulationError Handling Restarting Program ExecutionOpen 1,#1,F1DATES Opening a Sequential FileIf executed four times, it would read all eight values Refer to for further details of Print UsingWriting to a Sequential File Reading from a Sequential FileValue 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/OutputTo read the next record Opening and Closing a Random Disk FileReading from a Random 1/0 File Any of the parameters can be variablesDouble-precision value Writing to a Random 1/0 FileInteger Single-precision valueMKI$ Clear expression,address Attrib Fdrive numberfilename, W1Attrib Fdrive numberfilename, WO Auto first lineJ, incrementClose Commands and StatementsRules for function name are the same as for variable name DEF FNXDefsng Defdbl Defstr Defint Delete DIMEND ErrorDIR EditFOR-NEXT-STEP Error expressionExit FieldGET I file number ,record number GETGosub For variable=expression to expression Step expressionIF-THEN-ELSE InputGoto List KillLET Line InputLoad 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 Resume60 END SaveRUN line numberlstring expression ,F Line number RUN filename? 5,8,2 TRON, TroffWidth WaitATN ABSCHR$ CintFunctions AO/o = CsngCVI CVS 10 A# = 1.00/3.00EOF DskfOk· FIXHexs INPInputs INT InstrLEFT$ LOG LENLOC LOFMID$ MKI$ MKS$ MKD$OCT$ RIGHT$ string,integer RightsPeek expression POS integer10 a =1 SGNSIN SpacesSQRexpression SPCSPC integer If A$ = 2 then Print Correct Else GotoSTR$ 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 To resume program execution after it is stopped by To halt program execution and return to commandLevel To tab across the linePage 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 Executable Files Generating Boot-Loaded and PROM-Based VersionsBASIC-80 Source Files BASIC-80 Object FilesGenerating a Boot-Loaded RMX/80 BASIC-80 This option enables your user-written I/O drivers if you That are not boot loadedThis option is used to allocate memory. It is 1 if the boot Setting baud rates, refer to the RMX/SO Users GuideISBC 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 ISBC SO/10 System Clock Configuring DFS on an iSBC 80/10Adding BASIC-SO to an Existing RMX/SO Configuration Configuration RequirementsPublic 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
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