From nobody Mon Oct 16 12:49:40 2000 X-From-Line: sn@scgroup.com Mon Jul 24 16:32:59 2000 Received: from [206.100.10.38] (helo=cobalt4.source.net) by junk.nocrew.org with esmtp (Exim 3.12 #1 (Debian)) for lars@nocrew.org id 13GjHu-00035h-00; Mon, 24 Jul 2000 16:32:59 +0200 Received: from parissn (AMontsouris-101-1-1-158.abo.wanadoo.fr [193.251.38.158]) by cobalt4.source.net (8.9.3/8.9.3) with SMTP id HAA12665 for ; Mon, 24 Jul 2000 07:32:54 -0700 X-Gnus-Mail-Source: file:/var/spool/mail/lars Message-ID: <004701bff57b$e8e88bc0$0400000a@scgroup.com> From: "Stewart Nelson" To: "lars brinkhoff" References: <851z0j3hws.fsf@junk.nocrew.org> Subject: Re: Information about the SC-40 CPU Date: Mon, 24 Jul 2000 16:31:50 +0200 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4133.2400 Content-Transfer-Encoding: quoted-printable X-MIME-Autoconverted: from 8bit to quoted-printable by cobalt4.source.net id HAA12665 Lines: 50 Xref: junk.nocrew.org personal:4175 Hi Lars, In User Mode, our machines are essentially identical to the extended KL-10. There are no new instructions. There are some differences in intermediate results when instructions are interrupted, and our floating point answers are often more accurate when unnormalized operands are used. It is intended that all KL-10 user applications will run on our machines. The reverse is also true, if the needed resources are available. In Executive Mode, there are many differences, which allow for larger virtual and physical address spaces, and which provide access to new devices, e.g. SCSI. However, these enhancements are implemented by making additional operand formats available to existing I/O operations for paging, device control, etc. Again, the opcode set is identical to that of the KL-10B. If equipped with appropriate ancient DEC I/O devices, our machines can run unmodified binaries for both TOPS-10 and TOPS-20. Do you know Peter Lö6thberg (roll@stupi.se)? We gave some of our SC-25 machines to his organization. He is also a good source for PDP-10 information. I hope that the above description is sufficient for your needs. Stewart Nelson ----- Original Message ----- From: "lars brinkhoff" To: Sent: Monday, July 24, 2000 1:08 PM Subject: Information about the SC-40 CPU > Hello, > > I'm adding PDP-10 support to GNU binutils > (http://sources.redhat.com/binutils/). > > In order to support the SC-40 CPU better, I would like to know the > details of the instruction set supported by the SC-40. Is such > information available? > > Thank you. >