Date: Mon, 19 Jan 1998 22:48:51 +1030 From: Mike Smith <mike@smith.net.au> To: Bruce Evans <bde@zeta.org.au> Cc: gurney_j@resnet.uoregon.edu, mike@smith.net.au, emulation@FreeBSD.ORG, rhh@ct.picker.com, shmit@erols.com Subject: Re: DOSCMD: Problems w/ Quicken Message-ID: <199801191218.WAA00514@word.smith.net.au> In-Reply-To: Your message of "Mon, 19 Jan 1998 23:14:43 %2B1100." <199801191214.XAA12141@godzilla.zeta.org.au>
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> >Yeah, that's all fine, but what I *don't* understand is why it should > >be trapping as it does claiming that 'movw (%bx),%ax' is an illegal > >instruction. > > When %bx = 0xffff, it should cause exception 13 (general protection) > in real mode. IIRC, this is one of the main differences between 8086's > and later86's in real mode. A difference implies two different behaviours. A GPF is one, what is the other (presumably that taken by the 8086)? Would you guess that this might be a CPU-type detection fragment? -- \\ Sometimes you're ahead, \\ Mike Smith \\ sometimes you're behind. \\ mike@smith.net.au \\ The race is long, and in the \\ msmith@freebsd.org \\ end it's only with yourself. \\
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