Figure 1: EPOC Install Files

Over the last few years Psion have made it very easy to install programs to your PDA with a new type of Software Installation System (SIS) which uses special Epoc Install files with the extension .sis. When run, these automatically install the software to your PDA, and are now widely used by both commercial developers and shareware authors alike. Generally several files needed for a program to run on your PDA are installed to the correct locations on running the SIS file, although occasionally more than one SIS file may need to be installed. It is usual for the Epoc Install files to be supplied along with a plain text Readme file containing last minute instructions and information on installation. If supplied it should be read before getting started.

	Figure 2: EPOC Install Running on a PC

PsiWin is the software supplied along with your EPOC device, which allows your PC to connect to your PDA. When the Psion Series 5 was first released, SIS files were not available, and consequently versions of PsiWin earlier than 2.1 do not by default support this file type. If your version of PsiWin is earlier than 2.1 you should either get a free upgrade called setup.exe from the Psion web site, which, when run, patches PsiWin to accept SIS files, or download version 2.1 for free from the same web site. Once you have a compatible version of PsiWin on your PC you should be able to see SIS files with their own icon, as with revolog.sis and sysram1.sis (Figure 1)

To install the SIS file, first connect your PDA with the cable supplied and select the remote link to cable in the tools menu of your Psion. PsiWin, which you should have installed on your PC, will then complete the connection. Now you are ready to simply double click on the SIS file to launch the EPOC install program (Figure 2). You will first be asked, if appropriate, which drive you would like to install to. On the Psion Revo for example, there is only the internal C drive, other EPOC based devices, may have more than one drive to install to. Programs should be able to be run from any drive on your PDA, but check the programs documentation regarding this issue first.

	Figure 3: New Program RevoLog on Extras Bar

The EPOC Install program will automatically copy the applications component files to their correct location on your PDA. Remember that you may need to install more than one SIS file to your PDA for the software to work. When you have installed to your EPOC PDA using this method you should see a new icon in the extras bar on your machine (Figure3) which corresponds to the new program.

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