From mboxrd@z Thu Jan 1 00:00:00 1970 To: 9fans@cse.psu.edu From: "Douglas A. Gwyn" Message-ID: <3ED58601.8050904@null.net> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit References: , <021001c32577$e4703280$e3944251@insultant.net> Subject: Re: [9fans] memory stick Date: Thu, 29 May 2003 08:45:41 +0000 Topicbox-Message-UUID: bbb54a0c-eacb-11e9-9e20-41e7f4b1d025 boyd, rounin wrote: >>... an 11/45 > wasn't that sep i&d? there was something special about the 45 > and then there was those winchester memory/swap drives. The PDP-11/45 (and /50, which had MOS memory instead of core) was the first PDP-11 family member sporting separate I & D address spaces. It had a FastBus interconnect, but that was transparent to system software. Also I think the 11/45 was the first supporting an FP11 (fast floating-point coprocessor) option. 6th Ed. Unix came in two flavors, 11/40 and 11/45. The RK05 came in a couple of flavors, fixed vs. removable. Many of the early Unix distributions were on RK05 cartridge (removable) disks (list price of a blank RK05 disk was $105); most if not all of the others were on 9-track 1/2" magtape. There are still many PDP-11s in operation, as well as usable emulations in software on the PC and other platforms. It's kind of nice to be able to open a window and run a PDP-11 Unix in it.