Proteus is available in different versions: Ms-Dos™, Win32, Service, ISAPI, Unix™.

These are the main differences between the various versions:

DIRGET(drive)
DRIVEGET()

DIRGET()
LINK(file, link)

The functions SHORTNAME(pathname) and LONGNAME(pathname) are kept for compatibility only in the Unix™ version, where the value returned is always the value of the parameter specified.

The functions FATTRIB(pathname), CHMOD(pathname, flags), ISFILE(pathname), DIROPEN(pathname) and DIRLAST(h, field) have different flags, to take into account the differences between the operating systems.

It is important to note that:

• EOL is by default "\n" in the Unix™ version, "\r\n" in the other versions;
• OS is set to: 0 (Unix™), 1 (Ms-Dos™), 2 (Win32), 3 (ISAPI), 4 (Service);
• PID and FILE_MASK are pre-defined only in the Unix™ versions (Windows™ PID can be obtained by calling W32GETPROCESSID);
• the labels MS_DOS, WINDOWS, ISAPI, SERVICE, INTERACTIVE and UNIX are predefined or not according to the Proteus version;
• the ommand line parameter -k (which acts on the arguments of many filename-related library functions) converts any '/' to '\' under Dos/Windows™, and any '\' to '/' under Unix™.

There are no differences between the italian and english version, except for the error messages and the help.

If you want to write Proteus programs that can be run without modifications on different platforms, avoid using functions specific to a single version or adopt one of the following strategies:

• use directives to conditionally compile the source code (more efficient):

; Save current directory to CurDir (under Dos/Windows™, the current
; drive is also specified)
!ifdef UNIX
   SET CurDir = FUNC("DIRGET")
!else
   SET CurDir = FUNC("DIRGET", FUNC("DRIVEGET"))
!endif

• call the critical functions by using FUNC, after a test on OS, in this way:

; Save current directory to CurDir (under Dos/Windows™, the current
; drive is also specified)
IF OS
  SET CurDir = FUNC("DIRGET", FUNC("DRIVEGET"))
ELSE
  SET CurDir = FUNC("DIRGET")
FI

If you need to access the interpreter version, use the predefined identifier VERSION.