Games - RISC iX

	Games - RISC iX

RISC iX was a Unix-like operating system designed to run on the Acorn Archimedes. Heavily based on 4.3BSD, it was initially completed in 1988 - a year after Arthur but prior to RISC OS. It's relationship to ARX is unknown.

Other features included:

X11 (initially Release 2) with Ardent Window Manager, Tom's Window Manager and Ultrix Window Manager available by default
System V virtual memory extensions, compatible with the System V Interface Definition
C Compiler with ANSI C and pcc (Berkeley) compatibility
Sun Network File System version 3.2
ARM
Assembler

Later versions upgraded the X11 server to release 4, and was certified to conform to the X/Open Portability Guide 3 Base profile.

The native file system implemented a transparent file compression mechanism and the console featured a two-cursor text copying mechanism inspired by Acorn's own earlier 8-bit range including the BBC Micro.

Distribution

RISC iX was either supplied preinstalled on new computer hardware or was installed onsite from a portable tape drive by the Microcare department of Acorn, who would take the installation tape away with them. Cost of purchase was UK£1,000.

Once installed a backup of the core operating system to three floppy disks was possible, allowing future reinstallation.

Supported Hardare

Machines

M4

An unreleased machine, built internally by Acorn for the development of RISC iX. Reputedly only two were built and at least one of them has subsequently been destroyed.

A680 Technical Publishing System

Unreleased but widely prototyped, the A680 contained an ARM2 processor, 4 MB RAM and a 67 MB hard drive.

R140

Based on the A440, the R140 contained an 8 MHz ARM2 processor, 4 MB RAM and a 47 MB, later upgraded to 56 MB, ST506 hard drive. Supplied with RISC OS 2 in ROM, the machine would boot that OS then could either automatically boot RISC iX totally removing RISC OS from memory or continue running RISC OS - optionally being rebooted into RISC iX at any time.

At the time of initial release in 1989, the cost of the R140 was UK£3,500.

An ordinary A440 with at least 4 MB RAM and a suitable hard drive could run RISC iX. The R140 and A440 were hampered by the memory management system, using 32 KB pages.

R260

Based on the A560, the R260 contained a 33 MHz ARM3 processor, 4 MB RAM (upgradable to 16 MB) SCSI adapter and a 100MB SCSI hard drive. It booted in the same style as the earlier R140. The machine came with an ethernet adapter.

The system was releaed in 1990 priced UK£3,500 just as its predecessor had.

A similarly configured A560 could run RISC iX.

R225

The R225 was a discless version of the R260. It required a network file server or an R260 to boot.

Later Machines

RISC iX is not compatible with later Archimedes machines.

Peripherals

As well as industry-standard ethernet, Acorn's own Econet
was supported, including an IP over Econet transmission system.

[ Visit the complete Wikipedia entry for RISC iX ]

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