1. Overview
2. Platforms
   1. EPOC16

Overview

OpoLua provides command line tools for building and unpacking Psion Software Install System (SIS) files, as well as supporting installing them within the Swift and Qt GUI apps.

References:

• SIS File Format, by Alexander Thoukydideds

  Comprehensive details SIS file binary format.

• Psion Epoc SIS Installation Files, by Eric Lindsay

  High level overview of SIS files and the PKG format. Useful if you’re starting making your own SIS files.

Platforms

EPOC16

To make it easier to distribute and install EPOC16 programs¹, OpoLua uses the previously-unassigned installer version 0x10 (16) to allow us to mark SIS files targeting EPOC16 devices.

These EPOC16-friendly SIS files can be generated by adding a special target: epoc16 comment to your package file. For example,

; target: epoc16
&EN
#{"PsiMail Internet"},(0x00000001),0,0,0
"NET\SYS$SOCK.IMG"-"!:\NET\SYS$SOCK.IMG"
"NET\SOCKDYL.DYL"-"!:\NET\SOCKDYL.DYL"
"NET\SOCKET.DYL"-"!:\NET\SOCKET.DYL"
"NET\SCRIPT.DYL"-"!:\NET\SCRIPT.DYL"
"NET\STPRPR.DYL"-"!:\NET\STPRPR.DYL"
"NET\STPRTCP.DYL"-"!:\NET\STPRTCP.DYL"

This marker is used by OpoLua to pre-configure systems at install time for EPOC16 runtimes, and by apps like Reconnect to ensure programs can only be installed on compatible devices. It also allows us to disable EPOC32-specific functionality, and customize stub file paths (used for uninstallation).