changelog.html

我师兄自己写的操作系统

<a name="v1.1">
<h2>
<a href="http://prdownloads.sourceforge.net/bochs/bochs-bugfix-20010406-beta.tar.gz">Version 1.1 bugfix1</a> (April 6, 2001)
</h2>
  <ul>
  <li>This was the first SourceForge release by Bryce Denney, with patches from many sources on the bochs-developers list.
  <li>add BX_PANIC_IS_FATAL option.  <br>WARNING: Due to a implementation bug, nonfatal panics can create problems.  If you need to use BX_PANIC_IS_FATAL=0, move the bx_atexit() after the return line.  This problem was corrected in CVS after 5/2/2001, and appears in version 1.1.2 and later.
  <li>win32:
    <ul>
    <li>CDROM drive letter is no longer hardcoded
    <li>bypass fstat when opening WIN32 raw floppy disk
    </ul>
  <li>device models:
    <ul>
      <li>support sun cdrom
      <li>mouse: fix panics on 0xd3, 0xeb commands
      <li>harddrv: implement aborts on a few SET FEATURE commands
      <li>vga: implement VGA enable register 0x3c3
      <li>pit: allow modes 0,2,3 on any timer
    </ul>
  <li>many portability fixes
    <ul>
      <li>fix compile problems in FPU related to inline keyword
      <li>configure checks if compiler allows "LL" for 64-bit constant
      <li>renamed fpu function fabs, conflicts with math library
      <li>fix pointer crashes in FPU on 64-bit machines
      <li>provide libc functions snprintf, strtoull if missing
      <li>check if compiler allows __attribute__
      <li>comment out sigcontext struct definition because it conflicted with sigcontext on host system
    </ul>
  </ul>

<br>
<h2>
<a href="http://prdownloads.sourceforge.net/bochs/bochs-2000-03-25.tar.gz">bochs-2000_0315</a>
</h2>
  <ul>
  <li>Kevin removed all references to Bochs Software Company and "this is commercial software," and replaced them with Mandrake copyrights and LGPL.
  </ul>

<br>
<h2>
<a href="ftp://bochs.com/pub/bochs-2000_0104c.tar.gz">bochs-2000_0104c</a>
</h2>
  <ul>
  <li> FPU mods:
    <ul>
    <li> Integrated new FPU emulator mods from Bill Metzenthen.
    <li> Bill ported x86 specific assembly files to C.
    <li> I helped port the FPU emulator to work on big-endian machines.
         (tested on SPARC so far)
    <li> The FPU emulator is now integrated into the main bochs
         source code (in fpu/) for ease of compilation.
    <li> Tested on x86 and SPARC.
    <li> The '--enable-fpu' option no longer needs an argument.
    </ul>
  </ul>

<br>
<h2>
<a href="ftp://bochs.com/pub/bochs-991114a.tar.gz">bochs-991114a</a>
</h2>
  <ul>
  <li> CDROM emulation works on win32. &nbsp;Mods from Nick Behnken.
  <li> Cleaned up some problems with win32 compile with VC++.
  <li> Fixed ::call_protected() for protected mode call to same level
       via call gate.
  </ul>

<br>
<h2>
<a href="ftp://bochs.com/pub/bochs-991107c.tar.gz">bochs-991107c</a>
</h2>
  <ul>
  <li> Sound Blaster 16 emulation.
    <ul>
    <li> Integrated Sound Blaster 16 emulation from Josef Drexler.
    <li> Check out <a href="sound.html">sound.html</a> for SB16 notes.
    <li> Added configure option <a href="configure.html">--enable-sb16=</a>.
    </ul>
  <li> Started work on special guest driver to host interface, which
       will ultimately be used by disk/video/network etc drivers
       to enhance performance in bochs. &nbsp;Not usable yet.
  </ul>

<br>
<h2>
<a href="ftp://bochs.com/pub/bochs-991102a.tar.gz">bochs-991102a</a>
</h2>
  <ul>
  <li> NT4.0 installs in bochs (Pentium+FPU+CDROM options).
  <li> Please wait until next release for running NT unless you really
       need it.
  <li> Created (incomplete) docs-html/guestNT.html to outline process
       of installing NT4.0 in bochs.
  <li> More fixes to ::exception().
  <li> Fixes to ::stack_return_to_v86().
  <li> Mods to configure to handle win32 config again.
  <li> Integrates mods from win32 developers.
  <li> vga.cc handles variable number of lines in text mode. &nbsp;
       Updated GUI code for all platforms, to receive number of
       lines of text in ::text_update().
  </ul>

<br>
<h2>
<a href="ftp://bochs.com/pub/bochs-991023a.tar.gz">bochs-991023a</a>
</h2>
  <ul>
  <li> Integrated diffs submitted for OpenBSD cdrom support.
  <li> Fixed up v8086 mode and exception handling.
  <li> Fixed real-mode handling of IOPL flag WRT POPF/IRET.
  <li> Fixed handling of a bunch of weird 16/32-bit transitions.
       &nbsp;In the doing, I ended up recoding the following:
    <ul>
    <li> Recoded ::exception()
    <li> Recoded ::interrupt()
    <li> Recoded ::task_switch()
    </ul>
  <li> Cleaned up most warnings.
  <li> Added docs-html/codingguidelines.html.  Please peruse it, if
       you are a code submitter, and would like to comply with
       my code tyranny. :^)
  <li> Integrated new submitted Mac build files and gui code.
  <li> Have a few more issues to take care of before playing
       in the dynamic translation sandbox again.
  </ul>

<br>
<h2>
<a href="ftp://bochs.com/pub/bochs-991014a.tar.gz">bochs-991014a</a>
</h2>
  <ul>
  <li> CDROM emulation:
    <ul>
    <li> New ./configure option '--enable-cdrom'.  So far, there is
         only support for Linux.
    <li> I created a Linux specific CDROM component.  Mostly
         just ioctl()s needed to access a few functions of the
         cdrom.
    <li> Created 'iodev/cdrom.cc' and 'iodev/cdrom.h' which contain
         the low-level code.  Essentially, all the OS specific code
         is contained in these files.
    <li> Should be fairly easy to add code for other OSes.
    <li> Use .bochsrc directive 'cdromd: dev=/dev/cdrom, status=inserted'.
    <li> Will add an icon for cdrom to the UI later.
    <li> Tested cdrom emulation running Linux in bochs.  Use something
         like 'mount -r /dev/hdb /mnt/cdrom'.  Haven't checked out
         using it in Windows yet.
    </ul>
  </ul>

<br>
<h2>
<a href="ftp://bochs.com/pub/bochs-991012a.tar.gz">bochs-991012a</a>
</h2>
  <ul>
  <li> Moved default cpu level to Pentium.
  <li> Created docs-html/configure.html to explain options to configure.
  <li> Fixes to high-level CDROM support.
  <li> Added optional x86 hardware debug support:
    <ul>
    <li> '--enable-x86-debugger' is a new option to ./configure.
    <li> This is the debug support offered by an x86 CPU,
         not the native bochs debugger.
    <li> Added instruction and data breakpoint capabilities.
    <li> Added proper RF handling with or without hw debugging.
    <li> You can configure without this option for more speed.
    </ul>
  <li> FWAIT now calls FPU emulator like it should.
  <li> Changes to LMSW.
  <li> Moved a bunch of initial stderr messages to bochs.out.
  <li> More Pentium behaviour enhancements.
  <li> Modified HLT instruction.
  <li> GRUB now works in bochs and can load programs.
  <li> Compiled a new wm-FPU-emu version for this bochs version
       (only very minor mods).
  <li> Work on further Pentium emulation continues...
  </ul>

<br>
<h2>
<a href="ftp://bochs.com/pub/bochs-991004a.tar.gz">bochs-991004a</a>
</h2>
  <ul>
  <li> Added partial Pentium emulation:
    <ul>
    <li> --enable-cpu-level=5 is now possible from ./configure.
    <li> Default level still at 4 without above option.
    <li> Win'95 boots and recognizes Pentium emulation.
    <li> Linux boots and recognizes Pentium emulation.
    </ul>
  <li> Work on further Pentium emulation continues...
  </ul>

<br>
<h2>
<a href="ftp://bochs.com/pub/bochs-990925a.tar.gz">bochs-990925a</a>
</h2>
  <ul>
  <li> Generated new BIOS (bios/BIOS-bochs-990925a).
  <li> Fix to mouse BIOS code (int15h:c2:06:00).  The use of
       local code block/variables is not handled correctly by
       the bcc compiler.  Removed braces, and moved local variable
       to top level of function.
  <li> Fix to extended mem access BIOS function (int15h:87).
       This was killing Minix.
  <li> Fix to floppy.cc, was reading one extra sector.
  <li> Fix to Makefiles etc for compiling without floating point.
  <li> Minix boots again inside bochs.  Though, the keyboard code
       is not yet right for running Minix.  For some reason, if
       you comment out the 2 keyboard ACKs at lines 947 and
       966 in iodev/keyboard.cc, it works.
  </ul>

<br>
<h2>
<a href="ftp://bochs.com/pub/bochs-990923a.tar.gz">bochs-990923a</a>
</h2>
  <ul>
  <li> Fixes to vga.cc for odd VGA graphics modes.  Even the
       Windows'95 splash screen works now! (Craig Ballantyne)
  <li> Addition of postfix expression evaluator in the debugger.
       (Hanish Menon)
  <li> Support for 1.76MB floppies. (Hanish Menon)
  <li> Bug fix for debugger. (Hanish Menon)
  </ul>

<br>
<h2>
<a href="ftp://bochs.com/pub/bochs-990920a.tar.gz">bochs-990920a</a>
</h2>
  <ul>
  <li> Fixed bug in crc command from debug prompt
  <li> Bochs now can be compiled to use wm-FPU-emu,
       the x87 FPU emulator included in the Linux kernel.  It
       was written by Bill Metzenthen.  Look in fpu.html for
       more info.  Added "--enable-fpu=" to configure.  For now,
       this will only work on x86, since wm-FPU-emu has some
       assembly components.
  <li> Coded illegal instruction exception for old XBTS and IBTS
       opcodes.
  <li> Moved default cpu level to 486.
  <li> Decoupled main web page from user documentation in "docs-html".
  </ul>

<br>
<h2><font color="#000066">bochs-990907a</font></h2>
  <ul>
  <li> Fixed bug in rombios.c, new bios is bios/BIOS-bochs-990907a
  <li> Commented out load32bitOSImage directive in .bochsrc,
       should not have been left uncommented.
  <li> <b>Working on Pentium emulation next...</b>
  </ul>

<BR>
<H2><FONT COLOR="#000066">bochs-990708a</FONT></H2>
  <UL>
  <LI> integrated submitted mods to BeOS gui stuff
  <LI> integrated ne2k emulation (only FreeBSD low-level implemented)
  <LI> integrated mega patches which allow bochs to boot
       and run NT4/SP4 (simulating a 486sx)
    <UL>
    <LI> - Magic breakpoint
    <LI> - IDE CD-ROM (needs low-level OS stuff for all OSs)
    <LI> - Current time in time0
    <LI> - Instruction based simulation clock
    <LI> - Time breakpoints
    <LI> - Bios improvements [rombios-new.c]
    <LI> - Read/write breakpoints
    <LI> - Mode switch breakpoints
    <LI> - Bugfixes in iret
    <LI> - Bugfixes in the fetch/decode tables
    <LI> - CPUID instruction implemented
    <LI> - Additional support for the AC and ID bits
    <LI> - Intel division 'emulation'
    <LI> - Floating point fixes
    <LI>  - INVLPG instruction implemented
    <LI>  - Read-modify-write fault behavior fix
    <LI>  - Paging bugfixes
    <LI>  - Minor LES fix
    <LI>  - Interrupt handling bugfix
    <LI>  - V86 mode bugfixes
    <LI>  - Debugger bugfixes
    <LI>  - Sync on cpu implemented
    <LI>  - Sync on memory implemented
    <LI>  - New debugger commands:
      <UL>
      <LI> trace-on
      <LI> trace-off
      <LI> ptime
      <LI> sb
      <LI> sba
      <LI> diff-memory
      <LI> sync-memory
      <LI> sync-cpu
      <LI> fast-forward
      <LI> info-addr
      <LI> record
      <LI> playback
      <LI> modebp
      <LI> where
      <LI> print-string
      <LI> show
      <LI> print-stack
      <LI> load-symbols
      <LI> watch
      <LI> unwatch
      <LI> phy2log
      <LI> force-check
      </UL>
    <LI> - Mouse support through PS/2 interface
    <LI> - IDE improvements and bugfixes
    <LI> - External disk simulation interface
    <LI> - Keyboard bugfixes
    <LI> - Mouse support in the X11 gui
    <LI> - Improved debug support in I/O devices
    <LI> - VGA improvements and bugfixes
    </UL>
  <LI> New .bochsrc directives: "time0", "magic_break", "ne2k", "cdromd".
  <LI> Task switch bug fixed
  <LI> Integrated Mac port enhancements
  </UL>

<BR>
<A NAME="DTTeaser"></A>
<H2><FONT COLOR="#000066">bochs-990312b</FONT></H2>
  <UL>