OPENUP

OPENUP(string-expression)

Opens a file for input and output (reading and writing), returning an integer file handle used for READ, WRITE and CLOSE.

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Builtin Commands
- cd
- chdir
- version
Included Programs
- charmap
- cpubrand
- cpuid
- cpuvendor
- delete
- dir
- edit
- eval
- fstest
- graphicstest
- host
- init
- ip
- irc
- list
- mkdir
- proclist
- rmdir
- rocketsh
- sine
- socktest
- test
Creating BASIC programs
- Automatic line numbering
- Variable Naming
- Builtin Variables
- Variable Types
  - Integer
  - String
  - Real
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- Builtin Variables
- Parameter types
- Statements
  - BACKGROUND
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  - CHAIN
  - CHDIR
  - CIRCLE
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  - CLS
  - COLOUR/COLOR
  - CONNECT
  - CURSOR
  - DEF
  - DIM
  - ELSE
  - END
  - ENDIF
  - EVAL
  - FN
  - FOR
  - GCOL
  - GLOBAL
  - GOSUB
  - GOTO
  - IF
  - INPUT
  - LET
  - LIBRARY
  - LINE
  - LOCAL
  - NEXT
  - PLOT
  - POINT
  - POP
  - PRINT
  - PROC
  - PUSH
  - RECTANGLE
  - REDIM
  - REM
  - REPEAT
  - RETURN
  - SETVARI
  - SETVARR
  - SETVARS
  - SPRITELOAD
  - SPRITEFREE
  - SOCKCLOSE
  - SOCKREAD
  - SOCKWRITE
  - TRIANGLE
  - UNTIL
  - WRITE
  - YIELD
- Builtin Functions
  - Integer Functions
    - ABS
    - ASC
    - CHR
    - CPUID
    - CURRENTX
    - CURRENTY
    - EOF
    - EXISTSVARI
    - EXISTSVARR
    - EXISTSVARS
    - GETNAMECOUNT
    - GETPROCCOUNT
    - GETPROCCPUID
    - GETPROCID
    - GETPROCPARENT
    - GETSIZE
    - GETVARI
    - HEXVAL
    - INSTR
    - LCPUID
    - LGETLASTCPUID
    - LEN
    - MEMFREE
    - MEMORY
    - MEMUSED
    - OCTVAL
    - OPENIN
    - OPENOUT
    - OPENUP
    - RADIX
    - RGB
    - RND
    - SHL
    - SHR
    - SOCKCLOSE
    - SOCKREAD
    - SOCKSTATUS
    - TERMHEIGHT
    - TERMWIDTH
    - VAL
  - String Functions
    - BOOL$
    - CPUGETBRAND$
    - CPUGETVENDOR$
    - CSD$
    - DNS$
    - FILETYPE$
    - GETNAME$
    - GETVAR$
    - GETPROCNAME$
    - INKEY$
    - INSOCKET$
    - INTOASC$
    - LEFT$
    - LJUST$
    - LOWER$
    - LTRIM$
    - MID$
    - NETINFO$
    - RAMDISK$
    - RADIX$
    - REVERSE$
    - READ$
    - REP$
    - RIGHT$
    - RJUST$
    - RTRIM$
    - STR$
    - TOKENIZE$
    - TRIM$
    - UPPER$
  - Real Functions
    - COS
    - GETVARR
    - POW
    - REALVAL
    - SIN
    - TAN
- System Libraries
  - ansi

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OPENUP

OPENUP

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