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- Path: sparky!uunet!elroy.jpl.nasa.gov!usc!noiro.acs.uci.edu!beckman.com!dn66!a_rubin
- Newsgroups: comp.os.msdos.programmer
- Subject: Re: Strange 80x86 OPCODE
- Message-ID: <a_rubin.712450208@dn66>
- From: a_rubin@dsg4.dse.beckman.com (Arthur Rubin)
- Date: 29 Jul 92 22:50:08 GMT
- References: <3947@cruzio.santa-cruz.ca.us>
- Keywords: 80x86 Assembler Fun
- Nntp-Posting-Host: dn66.dse.beckman.com
- Lines: 21
-
- In <3947@cruzio.santa-cruz.ca.us> aki@cruzio.santa-cruz.ca.us writes:
-
-
- >Doing my thing I hit upon a truly strange op-code:
-
- >It's 0F 3D, i.e. 286+ 2-byte opcode that has 3D as the second
- >byte. Problem is, that I can't find any reference to it anywhere.
- >It looks like it's either something very new or undocumented.
-
- >I considered the possibility of the 0F being a 8088/8086 POP CS,
- >but the surrounding code excludes this.
-
- >Anyone have any idea what that opcode does?
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- Sourcer from V Communications doesn't think it's valid in up to 486s.
-
- --
- Arthur L. Rubin: a_rubin@dsg4.dse.beckman.com (work) Beckman Instruments/Brea
- 216-5888@mcimail.com 70707.453@compuserve.com arthur@pnet01.cts.com (personal)
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