Path: utzoo!utgpu!watmath!clyde!att!rutgers!mailrus!ames!oli-stl!asylum!romkey From: romkey@asylum.sf.ca.us (John Romkey) Newsgroups: comp.binaries.ibm.pc.d Subject: Re: v01i016: fract386, creates fractal display v2.1 (part 01/02) Keywords: fract386, VP/ix Message-ID: <1006@asylum.sf.ca.us> Date: 29 Nov 88 15:28:05 GMT References: <588@ctisbv.UUCP> Reply-To: romkey@asylum.UUCP (John Romkey) Organization: The Asylum; Belmont, CA Lines: 16 In article <588@ctisbv.UUCP> pim@ctisbv.UUCP (Pim Zandbergen) writes: >This is funny, fract386 runs just fine under VP/ix with SCO Xenix. >VP/ix emulates a 8086 pc. Can anybody explain this? Sure. VP/ix doesn't really emulate an 8086. It emulates a superset of an 8086. It precludes you from executing protected mode instructions and from using 32 bit segments. When you're running in VP/ix, the processor is still executing the instructions directly, so you can use the 32 bit-mode prefix on instructions and it will work. Likewise, instructions like ENTER and LEAVE, which were only added to later processors than the 8086 also work. -- - john romkey romkey@asylum.uucp romkey@xx.lcs.mit.edu romkey@asylum.sf.ca.us Find the cost of freedom, buried in the ground Mother Earth will swallow you, lay your body down.