From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-0.3 required=5.0 tests=BAYES_00, REPLYTO_WITHOUT_TO_CC autolearn=no autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 103376,bc1361a952ec75ca X-Google-Attributes: gid103376,public X-Google-ArrivalTime: 2001-08-27 17:54:08 PST Path: archiver1.google.com!newsfeed.google.com!sn-xit-02!supernews.com!newsfeed.direct.ca!look.ca!news.he.net!news-hog.berkeley.edu!ucberkeley!enews.sgi.com!coop.net!newsfeed1.global.lmco.com!svlnews.lmms.lmco.com!not-for-mail From: William Dale Newsgroups: comp.lang.ada Subject: Re: simple CPUs, was Re: How Ada could have prevented the Red Code distributed denial of service attack. Date: Mon, 27 Aug 2001 16:33:50 -0700 Organization: LMSSO Message-ID: <3B8AD8DE.5C309B0A@lmco.com> References: <9mdjbu$qri$1@nh.pace.co.uk> <4Awi7.19571$sa.10111360@news1.rdc1.sfba.home.com> <9me5uq$3v3$1@nh.pace.co.uk> Reply-To: william.dale.jr+adanews@lmco.com NNTP-Posting-Host: 129.197.210.101 Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Mailer: Mozilla 4.61 [en] (WinNT; U) X-Accept-Language: en Xref: archiver1.google.com comp.lang.ada:12497 Date: 2001-08-27T16:33:50-07:00 List-Id: Marin David Condic wrote: > > Seems like you could define your own instruction set and then write an > emulator for it and hope one day that someone implements your instruction > set in silicon - or maybe the computer manufacturers would adopt your > emulator because it justifies why everyone needs to buy an even faster yet > CPU from them. [snip] This is what Mil-Std-1750A/B tried to do. Today people think the 1750 is a CPU but if you read the standard it is a defined instruction set to promote re-use of code. Of course that never happened ;-) They made a hardware CPU based on the assembly code instructions. And nobody reuses 1750 code! Bloody awful CPU at that! Still used on avionics systems like F-22! William Dale mailto:william.dale.jr+ada_news@lmco.com