GWBASIC User's Manual

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GW-BASIC <strong>User's</strong> Guide MOV CL, [BX] ; Gets length of B$ in CL. MOV DX, 1[BX] ; Gets address of B$ text in DX. . . . MOV SI, 10[BP] ; Gets address of A in SI. MOV DI, 6[BP] ; Gets pointer to C in DI. MOVSW ; Stores variable A in C. RET 6 ; Restores stack and returns. MOVSW copies only two bytes. This is sufficient if variables A and C are integer. Four bytes must be copied if they are single precision; eight bytes, if they are double precision. Example 3: 100 DEF SEG=&H2000 110 ACC=&H7FA 120 CALL ACC(A, B$, C) . . . Line 100 sets the segment to hex 2000. The value of variable ACC is added into the address as the low word after the DEF SEG value is shifted four bits to the left (this is a function of the microprocessor, not of GW-BASIC). Here, ACC is set to &H7FA, so that the call to ACC executes the subroutine at the location hex 2000:7FA (absolute address hex 207FA). file:///C|/Documents%20and%20Settings/Lorenzo/Desktop/GW%20Basic/CALL.html (3 of 3)28/03/2004 21.29.13
GW-BASIC <strong>User's</strong> Guide CDBL Function Purpose: To convert x to a double-precision number. Syntax: CDBL(x) Comments: x must be a numeric expression. Example: 10 A=454.67 20 PRINT A; CDBL(A) RUN 454.67 454.6700134277344 Prints a double-precision version of the single-precision value stored in the variable named A. The last 11 numbers in the double-precision number have no meaning in this example, since A was previously defined to only two-decimal place accuracy. Note See the CINT and CSNG functions for converting numbers to integer and single precision, respectively. file:///C|/Documents%20and%20Settings/Lorenzo/Desktop/GW%20Basic/CDBL.html28/03/2004 21.29.14
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GWBASIC User's Manual User's Guide
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GWBASIC User's Manual FILES Command
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GWBASIC User's Manual PSET Statemen
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GW-BASIC User's Guide Chapter 1 Wel
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GW-BASIC User's Guide The Glossary
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GW-BASIC User's Guide 2.2.2 Indirec
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GW-BASIC User's Guide CTRL-G Causes
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GW-BASIC User's Guide Appendix H Ke
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GW-BASIC User's Guide KEY(n) n is a
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GW-BASIC User's Guide KEY(n) Statem
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GW-BASIC User's Guide LOC(x) Return
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GW-BASIC User's Guide 15 KEY OFF:CL
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GW-BASIC User's Guide and check the
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GW-BASIC User's Guide until the RUN
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GW-BASIC User's Guide To save a fil
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GW-BASIC User's Guide Hexadecimal H
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GW-BASIC User's Guide The GW-BASIC
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GW-BASIC User's Guide The arithmeti
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GW-BASIC User's Guide Modulus arith
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GW-BASIC User's Guide EQV X Y X EQV
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GW-BASIC User's Guide RUN FILENAME
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GW-BASIC User's Guide OPTION BASE S
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GW-BASIC User's Guide LET Statement
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GW-BASIC User's Guide . . 400 R=1:
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GW-BASIC User's Guide ● Sequentia
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GW-BASIC User's Guide The program i
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GW-BASIC User's Guide PUT #1, CODE%
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GW-BASIC User's Guide number. Lines
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GW-BASIC User's Guide Appendix A Er
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GW-BASIC User's Guide 18 Undefined
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Page 117 and 118: GW-BASIC User's Guide ABS Function
Page 119 and 120: GW-BASIC User's Guide CHR$ Function
Page 121 and 122: GW-BASIC User's Guide AUTO Command
Page 123 and 124: GW-BASIC User's Guide BLOAD Command
Page 125 and 126: GW-BASIC User's Guide BSAVE Command
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Page 131 and 132: GW-BASIC User's Guide INT Function
Page 133 and 134: GW-BASIC User's Guide CHAIN Stateme
Page 135 and 136: GW-BASIC User's Guide MERGE Command
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Page 169 and 170: GW-BASIC User's Guide CONT Command
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GW-BASIC User's Guide DEFINT/SNG/DB
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GW-BASIC User's Guide DEF and SEG m
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GW-BASIC User's Guide POKE Statemen
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GW-BASIC User's Guide EDIT Command
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GW-BASIC User's Guide ENVIRON State
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GW-BASIC User's Guide ENVIRON$ Func
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GW-BASIC User's Guide SHELL Stateme
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GW-BASIC User's Guide EOF Function
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GW-BASIC User's Guide ERDEV and ERD
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GW-BASIC User's Guide ERROR Stateme
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GW-BASIC User's Guide EXP Function
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GW-BASIC User's Guide FIELD Stateme
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GW-BASIC User's Guide GET Statement
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GW-BASIC User's Guide FOR ... NEXT
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GW-BASIC User's Guide FRE Function
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GW-BASIC User's Guide The number of
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GW-BASIC User's Guide GOTO Statemen
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GW-BASIC User's Guide OCT$ Function
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GW-BASIC User's Guide Testing Equal
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GW-BASIC User's Guide 1070 TIMEOUT%
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GW-BASIC User's Guide INPUT Stateme
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GW-BASIC User's Guide PRINT Stateme
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GW-BASIC User's Guide STRING$ Funct
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GW-BASIC User's Guide PRINT USING S
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GW-BASIC User's Guide ** A double a
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GW-BASIC User's Guide WIDTH Stateme
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GW-BASIC User's Guide INPUT# Statem
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GW-BASIC User's Guide 100 PRINT "TY
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GW-BASIC User's Guide IOCTL Stateme
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GW-BASIC User's Guide KILL Command
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GW-BASIC User's Guide MID$ Function
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GW-BASIC User's Guide LEN FUNCTION
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GW-BASIC User's Guide LINE INPUT# S
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GW-BASIC User's Guide LLIST Command
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GW-BASIC User's Guide LOC Function
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GW-BASIC User's Guide It is expecte
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GW-BASIC User's Guide LOG Function
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GW-BASIC User's Guide MID$ Statemen
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GW-BASIC User's Guide NAME Command
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GW-BASIC User's Guide ON ERROR GOTO
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GW-BASIC User's Guide ON ... GOSUB
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GW-BASIC User's Guide RESET Command
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GW-BASIC User's Guide Examples: The
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GW-BASIC User's Guide PCOPY Command
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GW-BASIC User's Guide n = 5 Returns
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GW-BASIC User's Guide PMAP Function
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GW-BASIC User's Guide The following
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GW-BASIC User's Guide If the string
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GW-BASIC User's Guide PUT Statement
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GW-BASIC User's Guide RND Function
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GW-BASIC User's Guide RESUME Statem
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GW-BASIC User's Guide RMDIR Command
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GW-BASIC User's Guide SAVE Command
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GW-BASIC User's Guide SGN Function
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GW-BASIC User's Guide SOUND Stateme
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GW-BASIC User's Guide SPACE$ Functi
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GW-BASIC User's Guide SQR Function
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GW-BASIC User's Guide STOP Statemen
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GW-BASIC User's Guide VAL Function
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GW-BASIC User's Guide TAN Function
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GW-BASIC User's Guide VARPTR$ Funct
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GW-BASIC User's Guide WAIT Statemen
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GW-BASIC User's Guide WINDOW Statem
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GW-BASIC User's Guide WRITE Stateme
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