This is a copy of Acorn's development tool set from 1994/1995. it is known by a number of names.
It supports development for RISC OS in the following languages.
It also contains a debugger, makefile system, and support tools for many aspects of development.
It supports generating code for 26-bit addressing mode versions of RISC OS for the Archimedes/A7000/Risc PC machines, running RISC OS 3.1x to RISC OS 6 (excluding RISC OS 5, and RISC OS 4.42 on the A9home).
It is possible to run the compiler on similar 26-bit addressing version of RISC OS from 3.1x onwards.
It neither runs, nor generates code suitable for any 32-bit addressing mode version of RISC OS (RISC OS 5, RISC OS 4.42), or those machines which use that, Iyonix, A9home, Beagleboard, Pandaboard or Raspberry Pi. A version that supports this (suitable for host machines running RISC OS 3.5 or newer) is available for purchase here.
Released to all users via Acorn's FTP site.
Released to Acorn's Registered Developers three weeks before the Acorn closed the workstation division.
The release details are included here.