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[Bug 1898954] Re: x86 f1 opcode hangs qemu

From: Launchpad Bug Tracker
Subject: [Bug 1898954] Re: x86 f1 opcode hangs qemu
Date: Fri, 09 Jul 2021 04:17:22 -0000

[Expired for QEMU because there has been no activity for 60 days.]

** Changed in: qemu
       Status: Incomplete => Expired

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  x86 f1 opcode hangs qemu

Status in QEMU:

Bug description:
  I have qemu installed and running in linux and windows
  in linux i execute the following simple code in real mode of cpu in my vm
  90 nop
  90 nop
  90 nop
  f1         ;this should conjure up my interrupt handler from ivt int 1
  --------- end of code ----
  it works properly in vbox,qemu linux,and even in my boot loder
  on a real platform
     it doeas not work fine in windows 10 (32 bit efi) based qemu
  all of the below was retyped there may be typo
  so onwards to the flawed software 
  ********** for qemu-system-x86_64.exe **********
  info version 
  ********** for qemu-system-i386.exe **********
  info version 
  my startup code is
  "d:\programs\qemu\qemu-system-x86_64.exe" -m 16M -boot a -fda "d:\floppy.img" 
-cpu Nehalem -machine pc
  also same flaw if i change above section to

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