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PsiWin 2.3.3 for SIBO

If you want to connect your Psion to your PC then you will need PsiWin and an RS232 serial cable. The latest version is PsiWin 2.3.3.

You can use PsiWin 2.3.3 to connect the following PDAs

  • SIBO (Siena, Series 3, 3a, 3c, 3mx and WorkAbout) and
  • EPOC (Series 5, 5mx, 7, Revo, NetPad and Netbook)

to a PC running

  • Windows 95, 98, 98se, Me, 2000, NT4, XP or Vista.

PsiWin 1.1: If you want to connect a Psion SIBO machine to Windows 3.1x then you can also use PsiWin 1.1 which offers convertion for SIBO sound and graphics files unavailable in 2.3.3.


Uninstall problems

Some people have experienced problems installing or uninstalling PsiWin 2.x, including removing the My Psion icon from the Desktop.

This Registry Cleaner removes only the Registry entries that PsiWin makes.

I downloaded it from Mike McConnell's excellent website.

Simply unzip the contents to the Desktop and right-click the .inf file and select Install. All PsiWin 2.x-related Registry entries will be removed. Then immediately re-boot.

Download (6KB Zip)


Download PsiWin 2.3.3
from this site

You can now download PsiWin 2.3.3 from this website in various languages (English, German, Spanish, French, Italian, Dutch).

PsiWin is designed to run under Windows NT, 98, 2000 and XP.


Registry Tweak for Psion SIBO PDAs

In order to use PsiWin 2.2.x or above with a Psion SIBO machine you may need to make this simple Registry tweak:

In the key


the EC_EXTRA field should have the value 36dd not 0

More details in this text file:

MS Outlook plug-in

If you install PsiWin 2.x on a machine with MS Outlook 97 or above you will see a new toolbar button (above).

This button gives you a one-click option to sync your EPOC Agenda, Contacts and E-mail with Outlook.

You can remove this button simply. More instructions in this text file:

PsiWin Registry Tweak
Download (2 KB)
PsiWin MS Outlook toolbar plug-in
Download (2 KB)


 Using PsiWin 2.3.3

You can use PsiWin 2.3.3 with your Psion SIBO machine. This is now available as a free download on the Psion website. HOWEVER you may need to make an alteration to the registry to allow it to work properly.


To connect your Psion SIBO machine to your PC you will require a special RS232 cable (for Siena, 3c and 3mx) or a 3Link cable for the Series 3 Classic or Series 3a.

Check out the cables page for options on how to connect your Psion to your PC or laptop via serial cable, USB or InfraRed.

Connection problems?

If you are having real problems connecting to either PsiWin 1.1 or PsiWin 2.x you can test to see whether your Psion and Windows are even communicating at the most basic level by opening up the COMMS application on your Psion and HyperTerminal on your PC. More details can be found at Mike McConnell's excellent website www.mgmcc.myby.co.uk under General Info, then click on Comms-Hyper.


Series 3/3a/3c/3mx or Siena files can now be converted to PC format and vice versa. This option was previously unavailable in PsiWin 2.1.

Convertion is done via a drag-and-drop method, or via the Psion | Convert option in PsiWin. A dialog box will pop-up offering you various convertion formats and options.

Installing Files

PsiWin 2.3.3 is EXCELLENT for installing Psion applications to the Siena, Series 3/3a/3c/3mx. Simply open a Windows Explorer folder containing the Psion app files and drag and drop them onto the PsiWin explorer window.


PsiWin 2.3.3 also makes backing up files simple. I personally back-up my Psion using both PsiWin 1.1 and PsiWin 2.3.3 (as well as Psi-Sync). This way I always have another current backup should one fail.


PsiWin 2.1

PsiWin 2.1 came bundled with the earliest Series 5 machines. The software allowed you to upgrade from a SIBO to an EPOC machine.

You can also use PsiWin 2.1 with the Psion SIBO range, but with limited functionality. It will allow you to

  • backup
  • drag-and-drop installs
  • convert SIBO files to EPOC

Note: PsiWin 2.1 does not need the registry tweak required for PsiWin 2.3.2 or PsiWin 2.3.3.


PsiWin 2.3.3 Convertion Library

With PsiWin 2.3.3 you can convert SIBO files to

Word processors

  • Lotus Ami Pro 3.0 and 3.1
  • Lotus WordPro 96, 97, 98 and Millennium
  • Microsoft Word for Windows 2.0, 6.0, 95, 97 & 2000
  • Microsoft Works for Windows 3.0, 4.0, 4.5 WP
  • Rich Text Format (RTF)
  • Text (Windows ANSI and MS-DOS)
  • WordPerfect 5.1, 5.2, 6.0, 7.0, 8.0, 9.0


  • Lotus 123 WK1, WK3, WK4, 97, 98 and Millennium
  • Microsoft Excel 4.0, 5.0, 95, 97 and 2000
  • Microsoft Works for Windows 3.0SS, 4.0SS and 4.5SS
  • Quattro Pro 5.0, 6.0, 7.0 and 8.0


Personal Information Managers (PIMs)

  • EPOC Agenda
  • Lotus Organizer 2.1 and 97(GS)
  • Microsoft Schedule+ 7, 7a and 7.5
  • Microsoft Outlook 97, 98 and 2000 (so long as no IMAP mail server is being used)


  • FoxPro 2.0, 2.5, 2.6 and 3.0
  • Borland dBASE III, IV and 5.0
  • CSV (Comma Separated Values)
  • Microsoft Access


To sychronize on a SIBO machine use Psi-Sync for MS Outlook.


To convert SIBO graphics use PsiWin 1.1 or XnView.


To convert SIBO sound use PsiWin 1.1



Contact us


Quick links


My Psion