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Article #1791Re: DECsystem-20 (sort of...)
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Date: Wed, 09 Aug 1989 19:04
Date: Wed, 09 Aug 1989 19:04
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In article <3151@blake.acs.washington.edu> mrc@Tomobiki-Cho.CAC.Washington.EDU (Mark Crispin) writes:
>As I remember, the F-1 (only one of which was ever built) was at III (is
>this right?) and was used to calculate the vector graphics used in TRON.
>On a PDP-10, TRON (Test Right half of register with immediate, set masked
>bits to Ones, and skip if any masked bits were Non-zero) is opcode 666!
Sounds like an IBM 709 clone. The corresponding 709 operation, RNT (Right
half indicators on test) was opcode 0056 (octal). LNT was 4056, RFT (Right
half indicators off test) was 0054 and LFT was 4054.
Marv Rubinstein
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!watmath!att!dptg!rutgers!cs.utexas.edu!ico!ism780c!news From: news@ism780c.isc.com (News system) Newsgroups: comp.arch Subject: Re: DECsystem-20 (sort of...) Message-ID: <31316@ism780c.isc.com> Date: 9 Aug 89 19:04:45 GMT References: <2679@phred.UUCP> <24933@tau.mips.COM> <3151@blake.acs.washington.edu> Reply-To: marv@ism780.UUCP (Marvin Rubenstein) Organization: Interactive Systems Corp., Santa Monica CA Lines: 11