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expressions. Approved by wiz.
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Summary of changes from version 0.2.4.1 to 0.3:
x) Performed a major code clean-up.
x) Support for using "configuration files" has been added, so settings
do not have to be entered on the command line anymore. (Useful for
complex emulation setups.)
x) Multiple machines can now be emulated simultaneously. (This is
still experimental, though, and probably a bit buggy.)
x) Some command line options have changed since 0.2.4.1, most notable
the options to select the machine to be emulated. -E should now be
used to select the machine type, and if necessary, -e can be used
to select a subtype.
x) Many bugfixes, too many to mention here.
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Here is a short summary of the changes from version 0.2.3 to 0.2.4:
x) Debian GNU/Linux can now be installed. However, it is VERY
unstable, and Linux Oopses when there is heavy serial console
output. A '-U' command line option reduces the risk, but doesn't
fix the problem.
x) When emulating framebuffers for machines like the DECstation
5000/200, that have a hardware mouse cursor, the host machine's
X cursor is now invisible. (This might not sound like a very
exiting change, but it "feels" a lot better than before.)
x) Improvements to the experimental dynamic binary translation
subsystem.
x) Many improvements to the single-step debugger.
x) Various other bugfixes and updates.
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X11 (enabled by default)
This closes PR pkg/28654 by pancake.
Here is a short summary of the changes from version 0.2.2 to 0.2.3:
x) An experimental dynamic binary translation subsystem has been
added, which improves speed. It should work when emulating
R3000-style CPUs. Add -b to the command line to enable bintrans.
(For R4000-style CPUs, the bintrans system is not entirely
reliable yet.) Bintrans backends have been written for the
Alpha and i386 platforms.
x) Redhat Linux 7.1 for mips has been verified to work under
DECstation 5000/200 emulation. (It could probably run with
earlier versions of the emulator, but I hadn't seen it myself.)
x) Lots of minor bug fixes.
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o) 0.2.1 -> 0.2.2:
x) Acer PICA-61 is now emulated well enough to let NetBSD/arc and
OpenBSD/arc be installed onto harddisk images.
x) Some parts of TCP/IP networking work when running Ultrix as
the guest OS. (Network support should still be considered
experimental, though, even for NetBSD, OpenBSD, and Linux.)
x) Ultrix running with more than one emulated graphics card (dual-
or tripple-headed workstation setup) works better than before;
when moving the host's mouse pointer from one framebuffer window
to another, the emulated mouse is now moved so that it should
appear on the correct emulated screen.
x) Mach (the microkernel) seems to boot and run on an emulated
DECstation. (Unfortunately, I haven't found any "mach_servers"
binaries for pmax yet, and without those the microkernel cannot
do much.)
x) Lots of minor bug fixes.
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which are the full option names used to set rpath directives for the
linker and the compiler, respectively. In places were we are invoking
the linker, use "${LINKER_RPATH_FLAG} <path>", where the space is
inserted in case the flag is a word, e.g. -rpath. The default values
of *_RPATH_FLAG are set by the compiler/*.mk files, depending on the
compiler that you use. They may be overridden on a ${OPSYS}-specific
basis by setting _OPSYS_LINKER_RPATH_FLAG and _OPSYS_COMPILER_RPATH_FLAG,
respectively. Garbage-collect _OPSYS_RPATH_NAME and _COMPILER_LD_FLAG.
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Changes:
0.1 -> 0.1.1:
x) Added support for booting directly from disk images and CDROM
images (so far only for the DECstation emulation mode).
0.1.1 -> 0.2:
x) More "guest" operating systems now run to an acceptable degree in
the emulator; apart from NetBSD/pmax and Ultrix/RISC, it is now
also possible to run OpenBSD/pmax and Sprite for DECstation.
x) Clock devices in the emulated environment should now adjust
themselves to tick at approximately the same speed as the host's
clock. (This can be overridden with a command-line option, to set
a fixed emulation speed, regardless of the host's speed.)
x) Networking support (TCP/IP) is partly implemented, enough to
perform an install of NetBSD/pmax or OpenBSD/pmax via ftp or nfs.
(This should be considered experimental.)
x) The DECstation mouse pointer is now "de-accelerated" to attempt
to follow the host's mouse pointer.
x) Some minor performance enhancements.
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20040701 The -j option now takes a name, the of the kernel as passed
on to the bootloader. ("netbsd" is the default name.)
Adding support to load bootstrap code directly from a disk
image, for DECstation. Both NetBSD/pmax and Ultrix boot
straight of a disk image now, with no need to supply a
kernel filename on the command line. (Ultrix still needs
-j vmunix, though, to boot from /vmunix instead of /netbsd.)
20040702 Minor bugfix (some new untested code for X11 keypresses was
incorrect).
20040702(later) Adding an ugly hack for CDROMs in FreeBSD; if an fread() isn't
done at a 2048-byte aligned offset, it will fail. The hack
tries to read at 2048-byte aligned offsets and move around
buffers to make it work.
Adding video off (screen blanking) support to BT459.
Making a 0.1.1 release.
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In mips64emul's current state, it is possible to emulate a DECstation well
enough to let NetBSD/pmax install itself onto a harddisk image, in a manner
very similar to how an install is performed on a real physical DECstation.
(Ultrix/RISC is also possible to install this way.)
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Changes:
27 Jun 2004:
(Early.) I found and fixed an interrupt related bug in the BT459 ramdac
device, which affected the performance of any machine using the PMAG-BA
negatively (that means DECstations), so now Ultrix 4.2 boots into graphical
login in about 25 seconds! Wow. For X11 bitdepths other than 8 or 24, a
warning message is printed at startup. Adding a BUGS file containing a
list of known bugs. I'm doing a lot of other minor fixes, optimizations,
and beautifying of the code as well. I measured the time of another full
NetBSD 1.6.2 install, on the same host and with the same compiler as on
the 24th of June:
Runtime flags: -CR4000 -D2 -q -M32 -I6000000
Total install time (NetBSD 1.6.2, silent mode): about 50 minutes
Total time until the login prompt appears: about 2 minutes
(This is with -CR4000 and without -X.)
Compiling the emulator inside itself: 1.5 hours
-fomit-frame-pointer is now enabled by default by the configure script,
if the C compiler supports it. Adding a minimal man page, doc/mips64emul.1.
25 Jun 2004:
(Later) Adding a -v (verbose) command line option. If -v is not specified,
the emulator goes into -q (quiet) mode just before it starts to execute
MIPS code.
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Changes:
23 Jun 2004:
(Early in the morning.) Performing a general code cleanup (comments,
fixing stuff that led to compiler warnings, ...).
Disabling MIPS16 support by default, and making it a configure time
option to enable it (--mips16). This gives a few percent speed increase
overall. Increasing performance by assuming that instruction loads
(reading from memory) will be at the same page as the last load.
First by assuming that a vaddr -> paddr translation for instruction
loads almost always is preserved (gaining a few percent speed), and
then that a paddr -> host memblock translation also holds if the
instruction is in normal RAM (which led to some more percents of speed
increase). :-) This is definitely a fine night for coding...
For example, the total time from starting the emulator until Ultrix 4.
2 shows it graphical login dialog is 48 seconds!
22 Jun 2004:
(Late.) Trying to track down the last SCSI tape bugs. Removing all
dynamic binary translation code (bintrans), starting from scratch again.
22 Jun 2004:
(Early in the morning.) Finally! After many many hours of trial and
error, I got the SCSI tape stuff to work; when going past the end of a
file, automagically switch to the beginning of the next.
21 Jun 2004:
Removing the Nintendo 64 emulation mode, as it is too uninteresting to
support. Adding SCSI tape device support (read-only, so far, and not
100% working). Fixing a bug which caused the cursor to be corrupted if
new data was written to the framebuffer, but the cursor wasn't moved.
20 Jun 2004:
Adding a program which converts SGI prom dumps from text capture to
binary, and some hacks to try to make such an IP22 PROM to work better
in the emulator.
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mips64emul is a MIPS machine emulator. The goals are to emulate 32-bit and
64-bit MIPS CPUs and enough surrounding hardware to fake real machines,
capable of running real (unmodified) operating systems, such as NetBSD or
Linux.
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