Editing IBM System 9000 (section)

==Features==
There were three versions of the System 9000. The 9001 was the [[benchtop]] (lab) model, the 9002 was the desktop model<ref name="bg26"/> without laboratory-specific features,{{r|clune198402}} and the 9003 was a manufacturing and process control version modified to be suitable for factory environments. The System 9002 and 9003 were based on the System 9001, which was based on around an 8{{nbsp}}MHz [[Motorola 68000]], and the Motorola [[VERSAbus]] [[system bus]] (the System 9000 was one of the few that used the VERSAbus). Input/output ports included three [[RS-232C]] serial ports, an [[IEEE-488]] instrument port, and a bidirectional 8-bit [[parallel port]]. For laboratory data acquisition, analog-to-digital converters that could be attached to its I/O ports were available.<ref name="Derfler">{{Cite magazine |last= Derfler |first= Frank J. Jr. |date=20 March 1984 |title=PC's Powerful Cousin: The IBM CS9000 |magazine=[[PC Magazine]] |volume=3 |issue=5 |pages=170{{ndash}}174}}</ref> User input could be via a user-definable 10-key touch panel on the integrated CRT display, a 57-key user-definable keypad, or a 83-key [[Model F keyboard]]. The touch panel and keypad were designed for controlling experiments.<ref name=CU/>

All System 9000 members had an IBM [[real-time operating system]] called CSOS (Computer System Operating System) on 128{{nbsp}}KB of [[read-only memory]] (ROM).<ref>{{Cite web |url=http://www.old-computers.com/museum/computer.asp?c=623&st=1 |title=Old-Computers.com collection |access-date=2011-08-18 |archive-url=https://web.archive.org/web/20091124124721/http://www.old-computers.com/museum/computer.asp?st=1&c=623 |archive-date=2009-11-24 |url-status=dead }}</ref><ref>http://www.old-computers.com/museum/doc.asp?c=623&st=1 oral history</ref> This was a [[Computer multitasking|multi-tasking]] operating system that could be extended by loading components from disk. IBM also offered [[Microsoft]] [[Xenix]] on the System 9002,{{r|clune198402}} but this required at least 640{{nbsp}}KB of [[main memory]] and a VERSAbus card containing a [[memory management unit]]. The machines shipped with 128{{nbsp}}KB of main memory as standard, and up to 5{{nbsp}}MB could be added to the system using memory boards that plugged into the VERSAbus. Each board could contain up to 1{{nbsp}}MB, which were installed in 256{{nbsp}}KB increments.<ref name="bg26">BYTE Guide to the IBM PC, fall 1984, p.26</ref>