Content deleted Content added
→Example computer architectures: yet more notable machines with 18-bit registers |
|||
| (2 intermediate revisions by 2 users not shown) | |||
Line 3:
{{N-bit|18|(2.25 [[Octet (computing)|octets]])}}
Eighteen binary digits have
Eighteen bits was a common [[Word (computer architecture)|word]] size for smaller computers in the 1960s, when large computers often using [[36-bit|36 bit words]] and [[Six-bit character code|6-bit character sets]], sometimes implemented as [[BCD (character encoding)|extensions of BCD]], were the norm. There were also 18-bit teletypes experimented with in the 1940s.
Line 10:
Possibly the most well-known 18-bit computer architectures are the [[PDP-1]], [[PDP-4]], [[PDP-7]], [[PDP-9]] and [[PDP-15]] [[minicomputer]]s produced by [[Digital Equipment Corporation]] from 1960 to 1975. [[Digital Equipment Corporation|Digital's]] [[PDP-10]] used [[36-bit]] words but had 18-bit addresses.
The [[UNIVAC]] division of [[Remington Rand]] produced several 18-bit computers, including the 1963 [[UNIVAC 418]] and several military systems.
The [[IBM 7700 Data Acquisition System]] was announced by [[IBM]] on December 2, 1963.
The 1964 [[CDC 6000 series]] and successors [[CDC 7600]] and [[CDC Cyber#Cyber 70 and 170 series|CDC Cyber 70 and 170 series]] used [[60-bit]] words but had 18-bit addresses.
The [[BCL Molecular|BCL Molecular 18]] was a group of systems designed and manufactured in the UK in the 1970s and 1980s.
Line 31 ⟶ 33:
==References==
{{reflist}}
== Further reading ==
* [http://research.microsoft.com/Users/gbell/Digital/timeline/18-bit.htm DIGITAL Computing Timelime: 18-bit architecture]
* [http://simh.trailing-edge.com/docs/architecture18b.pdf ''Architectural Evolution in DEC’s 18b Computers''], Bob Supnik, 2006.
| |||