GWBASIC User's Manual

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GW-BASIC <strong>User's</strong> Guide INP Function Purpose: To return the byte read from machine port n. Syntax: INP(n) Comments: n represents a valid machine port number within the range of 0 to 65535. The INP function is one way in which a peripheral device may communicate with a GW-BASIC program. INP is the complementary function to the OUT statement. Examples: 100 A=INP(56) Upon execution, variable A contains the value present on port 56. The number returned will be within the range of 0 to 255, decimal. The assembly language equivalent to this statement is MOV DX,56 IN AL,DX file:///C|/Documents%20and%20Settings/Lorenzo/Desktop/GW%20Basic/INP.html28/03/2004 21.29.30
GW-BASIC <strong>User's</strong> Guide INPUT Statement Purpose: To prepare the program for input from the terminal during program execution. Syntax: INPUT[;][prompt string;] list of variables INPUT[;][prompt string,] list of variables Comments: prompt string is a request for data to be supplied during program execution. list of variables contains the variable(s) that stores the data in the prompt string. Each data item in the prompt string must be surrounded by double quotation marks, followed by a semicolon or comma and the name of the variable to which it will be assigned. If more than one variable is given, data items must be separated by commas. The data entered is assigned to the variable list. The number of data items supplied must be the same as the number of variables in the list. The variable names in the list may be numeric or string variable names (including subscripted variables). The type of each data item input must agree with the type specified by the variable name. Too many or too few data items, or the wrong type of values (for example, numeric instead of string), causes the message "?Redo from start" to be printed. No assignment of input values is made until an acceptable response is given. A comma may be used instead of a semicolon after prompt string to suppress the question mark. For example, the following line prints the prompt with no question mark: INPUT "ENTER BIRTHDATE",B$ If the prompt string is preceded by a semicolon, the RETURN key pressed by the operator is suppressed. During program execution, data on that line is displayed, and data from the next PRINT statement is added to the line. When an INPUT statement is encountered during program execution, the program halts, the prompt string is displayed, and the operator types in the requested data. Strings that input to an INPUT statement need not be surrounded by quotation marks unless they contain commas or leading or trailing blanks. When the operator presses the RETURN key, program execution continues. file:///C|/Documents%20and%20Settings/Lorenzo/Desktop/GW%20Basic/INPUT.html (1 of 2)28/03/2004 21.29.30
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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 Sample GW-BAS
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GW-BASIC User's Guide system assume
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GW-BASIC User's Guide Note Reuse of
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GW-BASIC User's Guide moves the cha
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GW-BASIC User's Guide CTRL-G Causes
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GW-BASIC User's Guide BASIC User's
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GW-BASIC User's Guide Note ↵ (arr
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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 STRIG Trappin
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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 Chapter 3 Rev
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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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GW-BASIC User's Guide 59-60Unprinta
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GW-BASIC User's Guide 75 Path/File
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GW-BASIC User's Guide Appendix C AS
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GW-BASIC User's Guide Appendix D As
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GW-BASIC User's Guide moved the cur
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GW-BASIC User's Guide that the code
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GW-BASIC User's Guide converted to
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GW-BASIC User's Guide DEF USR State
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GW-BASIC User's Guide USR Function
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GW-BASIC User's Guide E.3 Multiple
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GW-BASIC User's Guide 8 8 18 24 90
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GW-BASIC User's Guide _ Underscore.
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GW-BASIC User's Guide Data represen
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GW-BASIC User's Guide binary system
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GW-BASIC User's Guide computers or
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GW-BASIC User's Guide double-precis
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GW-BASIC User's Guide graphics A ha
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GW-BASIC User's Guide precisely ref
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GW-BASIC User's Guide An extra-bit
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GW-BASIC User's Guide single-densit
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GW-BASIC User's Guide ABS Function
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GW-BASIC User's Guide CHR$ Function
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GW-BASIC User's Guide AUTO Command
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GW-BASIC User's Guide BLOAD Command
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GW-BASIC User's Guide BSAVE Command
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GW-BASIC User's Guide Note ● Valu
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GW-BASIC User's Guide CDBL Function
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GW-BASIC User's Guide INT Function
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GW-BASIC User's Guide CHAIN Stateme
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GW-BASIC User's Guide MERGE Command
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GW-BASIC User's Guide CIRCLE Statem
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GW-BASIC User's Guide COLOR Stateme
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GW-BASIC User's Guide For more info
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GW-BASIC User's Guide EGA with Enha
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GW-BASIC User's Guide SCREEN 10 ●
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GW-BASIC User's Guide For various s
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GW-BASIC User's Guide PALETTE, PALE
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GW-BASIC User's Guide Enhanced d EG
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GW-BASIC User's Guide N Move, but r
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GW-BASIC User's Guide LINE Statemen
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GW-BASIC User's Guide LINE (0,0)-(1
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GW-BASIC User's Guide tile_length i
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GW-BASIC User's Guide PRESET and PS
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GW-BASIC User's Guide CLEAR Command
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GW-BASIC User's Guide CLOSE Stateme
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GW-BASIC User's Guide COM(n) Statem
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Page 185 and 186: GW-BASIC User's Guide POKE Statemen
Page 187 and 188: GW-BASIC User's Guide EDIT Command
Page 189 and 190: GW-BASIC User's Guide ENVIRON State
Page 191 and 192: GW-BASIC User's Guide ENVIRON$ Func
Page 193 and 194: GW-BASIC User's Guide SHELL Stateme
Page 195 and 196: GW-BASIC User's Guide EOF Function
Page 197 and 198: GW-BASIC User's Guide ERDEV and ERD
Page 199 and 200: GW-BASIC User's Guide ERROR Stateme
Page 201 and 202: GW-BASIC User's Guide EXP Function
Page 203 and 204: GW-BASIC User's Guide FIELD Stateme
Page 205 and 206: GW-BASIC User's Guide GET Statement
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Page 209 and 210: GW-BASIC User's Guide FRE Function
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Page 213 and 214: GW-BASIC User's Guide GOTO Statemen
Page 215 and 216: GW-BASIC User's Guide OCT$ Function
Page 217 and 218: GW-BASIC User's Guide Testing Equal
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Page 223 and 224: GW-BASIC User's Guide PRINT Stateme
Page 225 and 226: GW-BASIC User's Guide STRING$ Funct
Page 227 and 228: GW-BASIC User's Guide PRINT USING S
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Page 231 and 232: GW-BASIC User's Guide WIDTH Stateme
Page 233 and 234: GW-BASIC User's Guide INPUT# Statem
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Page 237 and 238: GW-BASIC User's Guide IOCTL Stateme
Page 239 and 240: GW-BASIC User's Guide KILL Command
Page 241 and 242: GW-BASIC User's Guide MID$ Function
Page 243 and 244: GW-BASIC User's Guide LEN FUNCTION
Page 245 and 246: GW-BASIC User's Guide LINE INPUT# S
Page 247 and 248: GW-BASIC User's Guide LLIST Command
Page 249 and 250: GW-BASIC User's Guide LOC Function
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Page 257 and 258: GW-BASIC User's Guide MID$ Statemen
Page 259 and 260: GW-BASIC User's Guide NAME 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 . (period) A
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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 RANDOMIZE Sta
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GW-BASIC User's Guide RND Function
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GW-BASIC User's Guide . . . 129 FOR
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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 STRIG(n) Stat
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GW-BASIC User's Guide SYSTEM Comman
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GW-BASIC User's Guide TAN Function
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GW-BASIC User's Guide 08:00:05 The
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GW-BASIC User's Guide TRON/TROFF Co
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GW-BASIC User's Guide 0 1 Mode The
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GW-BASIC User's Guide VARPTR$ Funct
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GW-BASIC User's Guide The following
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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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GWBASIC User's Manual

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