Path: ...!local-4.nntp.ord.giganews.com!Xl.tags.giganews.com!local-2.nntp.ord.giganews.com!nntp.earthlink.com!news.earthlink.com.POSTED!not-for-mail NNTP-Posting-Date: Sun, 09 Jun 2024 13:34:29 +0000 Date: Sun, 9 Jun 2024 08:34:29 -0500 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird From: David Schultz Subject: Re: Privilege Levels Below User Newsgroups: comp.arch References: <5h%8O.4327$wDZ.776@fx48.iad> <1316e4baa439de908666e38c39cd8c79@www.novabbs.org> Content-Language: en-US In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Message-ID: Lines: 17 X-Usenet-Provider: http://www.giganews.com NNTP-Posting-Host: 108.194.109.78 X-Trace: sv3-DB1HVeJ3gCzz0MOczzKJ3AUChoudxAzuygLitcNmAGprANTM6P1xbf04yp5R43ZcXrjt5QqntgQtK+2!pyaUy+PYehPrbUcR1MLHH9qgNOFWhEG1SOG2GAF7U8yb8SSZNG3jpZReyZJ6W+xcOPoLLDyuUX+D!5l0f+RT+RHDqxhpPtN4IWzsvDktRnSxJgZwl3/b4nw== X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint properly X-Postfilter: 1.3.40 Bytes: 1875 On 6/8/24 9:23 PM, Lawrence D'Oliveiro wrote: > The Motorola 680x0 family was I think properly virtualizable in this > sense. Or maybe the 68020 and 68030 were, but the 68040 was. I think the > Motorola engineers working on the ’040 asked if any customers were > interested in preserving the self-virtualization feature, and nobody > seemed to care. The 68010 made the move from SR instruction privileged. CP/M-68K V1.2 added support for the 68010. The exception handler would patch the code to change a move from SR into a move from CCR. -- http://davesrocketworks.com David Schultz