/[gxemul]/trunk/HISTORY
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
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revision 20 by dpavlin, Mon Oct 8 16:19:23 2007 UTC revision 30 by dpavlin, Mon Oct 8 16:20:40 2007 UTC
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1  $Id: HISTORY,v 1.1055 2005/11/25 22:48:36 debug Exp $  $Id: HISTORY,v 1.1325 2006/08/15 15:38:37 debug Exp $
2    
3  Changelog for GXemul:  Changelog for GXemul:
4  ---------------------  ---------------------
# Line 2469  Changelog for GXemul: Line 2469  Changelog for GXemul:
2469    
2470  ==============  RELEASE 0.3.7  ==============  ==============  RELEASE 0.3.7  ==============
2471    
2472    20051126        Cobalt and PReP now work with the 21143 NIC.
2473                    Continuing on Alpha dyntrans things.
2474                    Fixing some more left-shift-by-24 to unsigned.
2475    20051127        Working on OpenFirmware emulation; major cleanup/redesign.
2476                    Progress on MacPPC emulation: NetBSD detects two CPUs (when
2477                    running with -n 2), framebuffer output (for text) works.
2478                    Adding quick-hack Bandit PCI controller and "gc" interrupt
2479                    controller for MacPPC.
2480    20051128        Changing from a Bandit to a Uni-North controller for macppc.
2481                    Continuing on OpenFirmware and MacPPC emulation in general
2482                    (obio controller, and wdc attached to the obio seems to work).
2483    20051129        More work on MacPPC emulation (adding a dummy ADB controller).
2484                    Continuing the PCI bus cleanup (endianness and tag composition)
2485                    and rewriting all PCI controllers' access functions.
2486    20051130        Various minor PPC dyntrans optimizations.
2487                    Manually inlining some parts of the framebuffer redraw routine.
2488                    Slowly beginning the conversion of the old MIPS emulation into
2489                    dyntrans (but this will take quite some time to get right).
2490                    Generalizing quick_pc_to_pointers.
2491    20051201        Documentation update (David Muse has made available a kernel
2492                    which simplifies Debian/DECstation installation).
2493                    Continuing on the ADB bus controller.
2494    20051202        Beginning a rewrite of the Zilog serial controller (dev_zs).
2495    20051203        Continuing on the zs rewrite (now called dev_z8530); conversion
2496                    to devinit style.
2497                    Reworking some of the input-only vs output-only vs input-output
2498                    details of src/console.c, better warning messages, and adding
2499                    a debug dump.
2500                    Removing the concept of "device state"; it wasn't really used.
2501                    Changing some debug output (-vv should now be used to show all
2502                    details about devices and busses; not shown during normal
2503                    startup anymore).
2504                    Beginning on some SPARC instruction disassembly support.
2505    20051204        Minor PPC updates (WALNUT skeleton stuff).
2506                    Continuing on the MIPS dyntrans rewrite.
2507                    More progress on the ADB controller (a keyboard is "detected"
2508                    by NetBSD and OpenBSD).
2509                    Downgrading OpenBSD/arc as a guest OS from "working" to
2510                    "almost working" in the documentation.
2511                    Progress on Algor emulation ("v3" PCI controller).
2512    20051205        Minor updates.
2513    20051207        Sorting devices according to address; this reduces complexity
2514                    of device lookups from O(n) to O(log n) in memory_rw (but no
2515                    real performance increase (yet) in experiments).
2516    20051210        Beginning the work on native dyntrans backends (by making a
2517                    simple skeleton; so far only for Alpha hosts).
2518    20051211        Some very minor SPARC updates.
2519    20051215        Fixing a bug in the MIPS mul (note: not mult) instruction,
2520                    so it also works with non-64-bit emulation. (Thanks to Alec
2521                    Voropay for noticing the problem.)
2522    20051216        More work on the fake/empty/simple/skeleton/whatever backend;
2523                    performance doesn't increase, so this isn't really worth it,
2524                    but it was probably worth it to prepare for a real backend
2525                    later.
2526    20051219        More instr call statistics gathering and analysis stuff.
2527    20051220        Another fix for MIPS 'mul'. Also converting mul and {d,}cl{o,z}
2528                    to dyntrans.
2529                    memory_ppc.c syntax error fix (noticed by Peter Valchev).
2530                    Beginning to move out machines from src/machine.c into
2531                    individual files in src/machines (in a way similar to the
2532                    autodev system for devices).
2533    20051222        Updating the documentation regarding NetBSD/pmax 3.0.
2534    20051223        - " - NetBSD/cats 3.0.
2535    20051225        - " - NetBSD/hpcmips 3.0.
2536    20051226        Continuing on the machine registry redesign.
2537                    Adding support for ARM rrx (33-bit rotate).
2538                    Fixing some signed/unsigned issues (exposed by gcc -W).
2539    20051227        Fixing the bug which prevented a NetBSD/prep 3.0 install kernel
2540                    from starting (triggered when an mtmsr was the last instruction
2541                    on a page). Unfortunately not enough to get the kernel to run
2542                    as well as the 2.1 kernels did.
2543    20051230        Some dyntrans refactoring.
2544    20051231        Continuing on the machine registry redesign.
2545    20060101-10     Continuing... moving more machines. Moving MD interrupt stuff
2546                    from machine.c into a new src/machines/interrupts.c.
2547    20060114        Adding various mvmeppc machine skeletons.
2548    20060115        Continuing on mvme* stuff. NetBSD/mvmeppc prints boot messages
2549                    (for MVME1600) and reaches the root device prompt, but no
2550                    specific hardware devices are emulated yet.
2551    20060116        Minor updates to the mvme1600 emulation mode; the Eagle PCI bus
2552                    seems to work without much modification, and a 21143 can be
2553                    detected, interrupts might work (but untested so far).
2554                    Adding a fake MK48Txx (mkclock) device, for NetBSD/mvmeppc.
2555    20060121        Adding an aux control register for ARM. (A BIG thank you to
2556                    Olivier Houchard for tracking down this bug.)
2557    20060122        Adding more ARM instructions (smulXY), and dev_iq80321_7seg.
2558    20060124        Adding disassembly of more ARM instructions (mia*, mra/mar),
2559                    and some semi-bogus XScale and i80321 registers.
2560    20060201-02     Various minor updates. Moving the last machines out of
2561                    machine.c.
2562    20060204        Adding a -c command line option, for running debugger commands
2563                    before the simulation starts, but after all files have been
2564                    loaded.
2565                    Minor iq80321-related updates.
2566    20060209        Minor hacks (DEVINIT macro, etc).
2567                    Preparing for the generalization of the 64-bit dyntrans address
2568                    translation subsystem.
2569    20060216        Adding ARM ldrd (double-register load).
2570    20060217        Continuing on various ARM-related stuff.
2571    20060218        More progress on the ATA/wdc emulation for NetBSD/iq80321.
2572                    NetBSD/evbarm can now be installed :-)  Updating the docs, etc.
2573                    Continuing on Algor emulation.
2574    
2575    ==============  RELEASE 0.3.8  ==============
2576    
2577    20060219        Various minor updates. Removing the old MIPS16 skeleton code,
2578                    because it will need to be rewritten for dyntrans anyway.
2579    20060220-22     Removing the non-working dyntrans backend support.
2580                    Continuing on the 64-bit dyntrans virtual memory generalization.
2581    20060223        More work on the 64-bit vm generalization.
2582    20060225        Beginning on MIPS dyntrans load/store instructions.
2583                    Minor PPC updates (64-bit load/store, etc).
2584                    Fixes for the variable-instruction-length framework, some
2585                    minor AVR updates (a simple Hello World program works!).
2586                    Beginning on a skeleton for automatically generating documen-
2587                    tation (for devices etc.).
2588    20060226        PPC updates (adding some more 64-bit instructions, etc).
2589                    AVR updates (more instructions).
2590                    FINALLY found and fixed the zs bug, making NetBSD/macppc
2591                    accept the serial console.
2592    20060301        Adding more AVR instructions.
2593    20060304        Continuing on AVR-related stuff. Beginning on a framework for
2594                    cycle-accurate device emulation. Adding an experimental "PAL
2595                    TV" device (just a dummy so far).
2596    20060305        Adding more AVR instructions.
2597                    Adding a dummy epcom serial controller (for TS7200 emulation).
2598    20060310        Removing the emul() command from configuration files, so only
2599                    net() and machine() are supported.
2600                    Minor progress on the MIPS dyntrans rewrite.
2601    20060311        Continuing on the MIPS dyntrans rewrite (adding more
2602                    instructions, etc).
2603    20060315        Adding more instructions (sllv, srav, srlv, bgtz[l], blez[l],
2604                    beql, bnel, slti[u], various loads and stores).
2605    20060316        Removing the ALWAYS_SIGNEXTEND_32 option, since it was rarely
2606                    used.
2607                    Adding more MIPS dyntrans instructions, and fixing bugs.
2608    20060318        Implementing fast loads/stores for MIPS dyntrans (big/little
2609                    endian, 32-bit and 64-bit modes).
2610    20060320        Making MIPS dyntrans the default configure option; use
2611                    "--enable-oldmips" to use the old bintrans system.
2612                    Adding MIPS dyntrans dmult[u]; minor updates.
2613    20060322        Continuing... adding some more instructions.
2614                    Adding a simple skeleton for demangling C++ "_ZN" symbols.
2615    20060323        Moving src/debugger.c into a new directory (src/debugger/).
2616    20060324        Fixing the hack used to load PPC ELFs (useful for relocated
2617                    Linux/ppc kernels), and adding a dummy G3 machine mode.
2618    20060325-26     Beginning to experiment with GDB remote serial protocol
2619                    connections; adding a -G command line option for selecting
2620                    which TCP port to listen to.
2621    20060330        Beginning a major cleanup to replace things like "0x%016llx"
2622                    with more correct "0x%016"PRIx64, etc.
2623                    Continuing on the GDB remote serial protocol support.
2624    20060331        More cleanup, and some minor GDB remote progress.
2625    20060402        Adding a hack to the configure script, to allow compilation
2626                    on systems that lack PRIx64 etc.
2627    20060406        Removing the temporary FreeBSD/arm hack in dev_ns16550.c and
2628                    replacing it with a better fix from Olivier Houchard.
2629    20060407        A remote debugger (gdb or ddd) can now start and stop the
2630                    emulator using the GDB remote serial protocol, and registers
2631                    and memory can be read. MIPS only for now.
2632    20060408        More GDB progress: single-stepping also works, and also adding
2633                    support for ARM, PowerPC, and Alpha targets.
2634                    Continuing on the delay-slot-across-page-boundary issue.
2635    20060412        Minor update: beginning to add support for the SPARC target
2636                    to the remote GDB functionality.
2637    20060414        Various MIPS updates: adding more instructions for dyntrans
2638                    (eret, add), and making some exceptions work. Fixing a bug
2639                    in dmult[u].
2640                    Implementing the first SPARC instructions (sethi, or).
2641    20060415        Adding "magic trap" instructions so that PROM calls can be
2642                    software emulated in MIPS dyntrans.
2643                    Adding more MIPS dyntrans instructions (ddiv, dadd) and
2644                    fixing another bug in dmult.
2645    20060416        More MIPS dyntrans progress: adding [d]addi, movn, movz, dsllv,
2646                    rfi, an ugly hack for supporting R2000/R3000 style faked caches,
2647                    preliminary interrupt support, and various other updates and
2648                    bugfixes.
2649    20060417        Adding more SPARC instructions (add, sub, sll[x], sra[x],
2650                    srl[x]), and useful SPARC header definitions.
2651                    Adding the first (trivial) x86/AMD64 dyntrans instructions (nop,
2652                    cli/sti, stc/clc, std/cld, simple mov, inc ax). Various other
2653                    x86 updates related to variable instruction length stuff.
2654                    Adding unaligned loads/stores to the MIPS dyntrans mode (but
2655                    still using the pre-dyntrans (slow) imlementation).
2656    20060419        Fixing a MIPS dyntrans exception-in-delay-slot bug.
2657                    Removing the old "show opcode statistics" functionality, since
2658                    it wasn't really useful and isn't implemented for dyntrans.
2659                    Single-stepping (or running with instruction trace) now looks
2660                    ok with dyntrans with delay-slot architectures.
2661    20060420        Minor hacks (removing the -B command line option when compiled
2662                    for non-bintrans, and some other very minor updates).
2663                    Adding (slow) MIPS dyntrans load-linked/store-conditional.
2664    20060422        Applying fixes for bugs discovered by Nils Weller's nwcc
2665                    (static DEC memmap => now per machine, and adding an extern
2666                    keyword in cpu_arm_instr.c).
2667                    Finally found one of the MIPS dyntrans bugs that I've been
2668                    looking for (copy/paste spelling error BIG vs LITTLE endian in
2669                    cpu_mips_instr_loadstore.c for 16-bit fast stores).
2670                    FINALLY found the major MIPS dyntrans bug: slti vs sltiu
2671                    signed/unsigned code in cpu_mips_instr.c. :-)
2672                    Adding more MIPS dyntrans instructions (lwc1, swc1, bgezal[l],
2673                    ctc1, tlt[u], tge[u], tne, beginning on rdhwr).
2674                    NetBSD/hpcmips can now reach userland when using dyntrans :-)
2675                    Adding some more x86 dyntrans instructions.
2676                    Finally removed the old Alpha-specific virtual memory code,
2677                    and replaced it with the generic 64-bit version.
2678                    Beginning to add disassembly support for SPECIAL3 MIPS opcodes.
2679    20060423        Continuing on the delay-slot-across-page-boundary issue;
2680                    adding an end_of_page2 ic slot (like I had planned before, but
2681                    had removed for some reason).
2682                    Adding a quick-and-dirty fallback to legacy coprocessor 1
2683                    code (i.e. skipping dyntrans implementation for now).
2684                    NetBSD/hpcmips and NetBSD/pmax (when running on an emulated
2685                    R4400) can now be installed and run. :-)  (Many bugs left
2686                    to fix, though.)
2687                    Adding more MIPS dyntrans instructions: madd[u], msub[u].
2688                    Cleaning up the SPECIAL2 vs R5900/TX79/C790 "MMI" opcode
2689                    maps somewhat (disassembly and dyntrans instruction decoding).
2690    20060424        Adding an isa_revision field to mips_cpu_types.h, and making
2691                    sure that SPECIAL3 opcodes cause Reserved Instruction
2692                    exceptions on MIPS32/64 revisions lower than 2.
2693                    Adding the SPARC 'ba', 'call', 'jmpl/retl', 'and', and 'xor'
2694                    instructions.
2695    20060425        Removing the -m command line option ("run at most x
2696                    instructions") and -T ("single_step_on_bad_addr"), because
2697                    they never worked correctly with dyntrans anyway.
2698                    Freshening up the man page.
2699    20060428        Adding more MIPS dyntrans instructions: bltzal[l], idle.
2700                    Enabling MIPS dyntrans compare interrupts.
2701    20060429        FINALLY found the weird dyntrans bug, causing NetBSD etc. to
2702                    behave strangely: some floating point code (conditional
2703                    coprocessor branches) could not be reused from the old
2704                    non-dyntrans code. The "quick-and-dirty fallback" only appeared
2705                    to work. Fixing by implementing bc1* for MIPS dyntrans.
2706                    More MIPS instructions: [d]sub, sdc1, ldc1, dmtc1, dmfc1, cfc0.
2707                    Freshening up MIPS floating point disassembly appearance.
2708    20060430        Continuing on C790/R5900/TX79 disassembly; implementing 128-bit
2709                    "por" and "pextlw".
2710    20060504        Disabling -u (userland emulation) unless compiled as unstable
2711                    development version.
2712                    Beginning on freshening up the testmachine include files,
2713                    to make it easier to reuse those files (placing them in
2714                    src/include/testmachine/), and beginning on a set of "demos"
2715                    or "tutorials" for the testmachine functionality.
2716                    Minor updates to the MIPS GDB remote protocol stub.
2717                    Refreshing doc/experiments.html and gdb_remote.html.
2718                    Enabling Alpha emulation in the stable release configuration,
2719                    even though no guest OSes for Alpha can run yet.
2720    20060505        Adding a generic 'settings' object, which will contain
2721                    references to settable variables (which will later be possible
2722                    to access using the debugger).
2723    20060506        Updating dev_disk and corresponding demo/documentation (and
2724                    switching from SCSI to IDE disk types, so it actually works
2725                    with current test machines :-).
2726    20060510        Adding a -D_LARGEFILE_SOURCE hack for 64-bit Linux hosts,
2727                    so that fseeko() doesn't give a warning.
2728                    Updating the section about how dyntrans works (the "runnable
2729                    IR") in doc/intro.html.
2730                    Instruction updates (some x64=1 checks, some more R5900
2731                    dyntrans stuff: better mul/mult separation from MIPS32/64,
2732                    adding ei and di).
2733                    Updating MIPS cpuregs.h to a newer one (from NetBSD).
2734                    Adding more MIPS dyntrans instructions: deret, ehb.
2735    20060514        Adding disassembly and beginning implementation of SPARC wr
2736                    and wrpr instructions.
2737    20060515        Adding a SUN SPARC machine mode, with dummy SS20 and Ultra1
2738                    machines. Adding the 32-bit "rd psr" instruction.
2739    20060517        Disassembly support for the general SPARC rd instruction.
2740                    Partial implementation of the cmp (subcc) instruction.
2741                    Some other minor updates (making sure that R5900 processors
2742                    start up with the EIE bit enabled, otherwise Linux/playstation2
2743                    receives no interrupts).
2744    20060519        Minor MIPS updates/cleanups.
2745    20060521        Moving the MeshCube machine into evbmips; this seems to work
2746                    reasonably well with a snapshot of a NetBSD MeshCube kernel.
2747                    Cleanup/fix of MIPS config0 register initialization.
2748    20060529        Minor MIPS fixes, including a sign-extension fix to the
2749                    unaligned load/store code, which makes NetBSD/pmax on R3000
2750                    work better with dyntrans. (Ultrix and Linux/DECstation still
2751                    don't work, though.)
2752    20060530        Minor updates to the Alpha machine mode: adding an AlphaBook
2753                    mode, an LCA bus (forwarding accesses to an ISA bus), etc.
2754    20060531        Applying a bugfix for the MIPS dyntrans sc[d] instruction from
2755                    Ondrej Palkovsky. (Many thanks.)
2756    20060601        Minifix to allow ARM immediate msr instruction to not give
2757                    an error for some valid values.
2758                    More Alpha updates.
2759    20060602        Some minor Alpha updates.
2760    20060603        Adding the Alpha cmpbge instruction. NetBSD/alpha prints its
2761                    first boot messages :-) on an emulated Alphabook 1.
2762    20060612        Minor updates; adding a dev_ether.h include file for the
2763                    testmachine ether device. Continuing the hunt for the dyntrans
2764                    bug which makes Linux and Ultrix on DECstation behave
2765                    strangely... FINALLY found it! It seems to be related to
2766                    invalidation of the translation cache, on tlbw{r,i}. There
2767                    also seems to be some remaining interrupt-related problems.
2768    20060614        Correcting the implementation of ldc1/sdc1 for MIPS dyntrans
2769                    (so that it uses 16 32-bit registers if the FR bit in the
2770                    status register is not set).
2771    20060616        REMOVING BINTRANS COMPLETELY!
2772                    Removing the old MIPS interpretation mode.
2773                    Removing the MFHILO_DELAY and instruction delay stuff, because
2774                    they wouldn't work with dyntrans anyway.
2775    20060617        Some documentation updates (adding "NetBSD-archive" to some
2776                    URLs, and new Debian/DECstation installation screenshots).
2777                    Removing the "tracenull" and "enable-caches" configure options.
2778                    Improving MIPS dyntrans performance somewhat (only invalidate
2779                    translations if necessary, on writes to the entryhi register,
2780                    instead of doing it for all cop0 writes).
2781    20060618        More cleanup after the removal of the old MIPS emulation.
2782                    Trying to fix the MIPS dyntrans performance bugs/bottlenecks;
2783                    only semi-successful so far (for R3000).
2784    20060620        Minor update to allow clean compilation again on Tru64/Alpha.
2785    20060622        MIPS cleanup and fixes (removing the pc_last stuff, which
2786                    doesn't make sense with dyntrans anyway, and fixing a cross-
2787                    page-delay-slot-with-exception case in end_of_page).
2788                    Removing the old max_random_cycles_per_chunk stuff, and the
2789                    concept of cycles vs instructions for MIPS emulation.
2790                    FINALLY found and fixed the bug which caused NetBSD/pmax
2791                    clocks to behave strangely (it was a load to the zero register,
2792                    which was treated as a NOP; now it is treated as a load to a
2793                    dummy scratch register).
2794    20060623        Increasing the dyntrans chunk size back to
2795                    N_SAFE_DYNTRANS_LIMIT, instead of N_SAFE_DYNTRANS_LIMIT/2.
2796                    Preparing for a quick release, even though there are known
2797                    bugs, and performance for non-R3000 MIPS emulation is very
2798                    poor. :-/
2799                    Reverting to half the dyntrans chunk size again, because
2800                    NetBSD/cats seemed less stable with full size chunks. :(
2801                    NetBSD/sgimips 3.0 can now run :-)  (With release 0.3.8, only
2802                    NetBSD/sgimips 2.1 worked, not 3.0.)
2803    
2804    ==============  RELEASE 0.4.0  ==============
2805    
2806    20060624        Replacing the error-prone machine type initialization stuff
2807                    with something more reasonable.
2808                    Finally removing the old "cpu_run" kludge; moving around stuff
2809                    in machine.c and emul.c to better suit the dyntrans system.
2810                    Various minor dyntrans cleanups (renaming translate_address to
2811                    translate_v2p, and experimenting with template physpages).
2812    20060625        Removing the speed hack which separated the vph entries into
2813                    two halves (code vs data); things seem a lot more stable now.
2814                    Minor performance hack: R2000/R3000 cache isolation now only
2815                    clears address translations when going into isolation, not
2816                    when going out of it.
2817                    Fixing the MIPS interrupt problems by letting mtc0 immediately
2818                    cause interrupts.
2819    
2820    ==============  RELEASE 0.4.0.1  ==============
2821    
2822    20060626        Continuing on SPARC emulation (beginning on the 'save'
2823                    instruction, register windows, etc).
2824    20060629        Planning statistics gathering (new -s command line option),
2825                    and renaming speed_tricks to allow_instruction_combinations.
2826    20060630        Some minor manual page updates.
2827                    Various cleanups.
2828                    Implementing the -s command line option.
2829    20060701        FINALLY found the bug which prevented Linux and Ultrix from
2830                    running without the ugly hack in the R2000/R3000 cache isol
2831                    code; it was the phystranslation hint array which was buggy.
2832                    Removing the phystranslation hint code completely, for now.
2833    20060702        Minor dyntrans cleanups; invalidation of physpages now only
2834                    invalidate those parts of a page that have actually been
2835                    translated. (32 parts per page.)
2836                    Some MIPS non-R3000 speed fixes.
2837                    Experimenting with MIPS instruction combination for some
2838                    addiu+bne+sw loops, and sw+sw+sw.
2839                    Adding support (again) for larger-than-4KB pages in MIPS tlbw*.
2840                    Continuing on SPARC emulation: adding load/store instructions.
2841    20060704        Fixing a virtual vs physical page shift bug in the new tlbw*
2842                    implementation. Problem noticed by Jakub Jermar. (Many thanks.)
2843                    Moving rfe and eret to cpu_mips_instr.c, since that is the
2844                    only place that uses them nowadays.
2845    20060705        Removing the BSD license from the "testmachine" include files,
2846                    placing them in the public domain instead; this enables the
2847                    testmachine stuff to be used from projects which are
2848                    incompatible with the BSD license for some reason.
2849    20060707        Adding instruction combinations for the R2000/R3000 L1
2850                    I-cache invalidation code used by NetBSD/pmax 3.0, lui+addiu,
2851                    various branches followed by addiu or nop, and jr ra followed
2852                    by addiu. The time it takes to perform a full NetBSD/pmax R3000
2853                    install on the laptop has dropped from 573 seconds to 539. :-)
2854    20060708        Adding a framebuffer controller device (dev_fbctrl), which so
2855                    far can be used to change the fb resolution during runtime, but
2856                    in the future will also be useful for accelerated block fill/
2857                    copy, and possibly also simplified character output.
2858                    Adding an instruction combination for NetBSD/pmax' strlen.
2859    20060709        Minor fixes: reading raw files in src/file.c wasn't memblock
2860                    aligned, removing buggy multi_sw MIPS instruction combination,
2861                    etc.
2862    20060711        Adding a machine_qemu.c, which contains a "qemu_mips" machine.
2863                    (It mimics QEMU's MIPS machine mode, so that a test kernel
2864                    made for QEMU_MIPS also can run in GXemul... at least to some
2865                    extent.)  Adding a short section about how to run this mode to
2866                    doc/guestoses.html.
2867    20060714        Misc. minor code cleanups.
2868    20060715        Applying a patch which adds getchar() to promemul/yamon.c
2869                    (from Oleksandr Tymoshenko).
2870                    Adding yamon.h from NetBSD, and rewriting yamon.c to use it
2871                    (instead of ugly hardcoded numbers) + some cleanup.
2872    20060716        Found and fixed the bug which broke single-stepping of 64-bit
2873                    programs between 0.4.0 and 0.4.0.1 (caused by too quick
2874                    refactoring and no testing). Hopefully this fix will not
2875                    break too many other things.
2876    20060718        Continuing on the 8253 PIT; it now works with Linux/QEMU_MIPS.
2877                    Re-adding the sw+sw+sw instr comb (the problem was that I had
2878                    ignored endian issues); however, it doesn't seem to give any
2879                    big performance gain.
2880    20060720        Adding a dummy Transputer mode (T414, T800 etc) skeleton (only
2881                    the 'j' and 'ldc' instructions are implemented so far). :-}
2882    20060721        Adding gtreg.h from NetBSD, updating dev_gt.c to use it, plus
2883                    misc. other updates to get Linux 2.6 for evbmips/malta working
2884                    (thanks to Alec Voropay for the details).
2885                    FINALLY found and fixed the bug which made tlbw* for non-R3000
2886                    buggy; it was a reference count problem in the dyntrans core.
2887    20060722        Testing stuff; things seem stable enough for a new release.
2888    
2889    ==============  RELEASE 0.4.1  ==============
2890    
2891    20060723        More Transputer instructions (pfix, nfix, opr, mint, ldl, ldlp,
2892                    eqc, rev, ajw, stl, stlf, sthf, sub, ldnl, ldnlp, ldpi, move,
2893                    wcnt, add, bcnt).
2894                    Adding more SPARC instructions (andcc, addcc, bl, rdpr).
2895                    Progress on the igsfb framebuffer used by NetBSD/netwinder.
2896                    Enabling 8-bit fills in dev_fb.
2897                    NetBSD/netwinder 3.0.1 can now run from a disk image :-)
2898    20060724        Cleanup/performance fix for 64-bit virtual translation table
2899                    updates (by removing the "timestamp" stuff). A full NetBSD/pmax
2900                    3.0.1 install for R4400 has dropped from 667 seconds to 584 :)
2901                    Fixing the igsfb "almost vga" color (it is 24-bit, not 18-bit).
2902                    Adding some MIPS instruction combinations (3*lw, and 3*addu).
2903                    The 8048 keyboard now turns off interrupt enable between the
2904                    KBR_ACK and the KBR_RSTDONE, to work better with Linux 2.6.
2905                    Not causing PPC DEC interrupts if PPC_NO_DEC is set for a
2906                    specific CPU; NetBSD/bebox gets slightly further than before.
2907                    Adding some more SPARC instructions: branches, udiv.
2908    20060725        Refreshing dev_pckbc.c a little.
2909                    Cleanups for the SH emulation mode, and adding the first
2910                    "compact" (16-bit) instructions: various simple movs, nop,
2911                    shll, stc, or, ldc.
2912    20060726        Adding dummy "pcn" (AMD PCnet NIC) PCI glue.
2913    20060727        Various cleanups; removing stuff from cpu.h, such as
2914                    running_translated (not really meaningful anymore), and
2915                    page flags (breaking into the debugger clears all translations
2916                    anyway).
2917                    Minor MIPS instruction combination updates.
2918    20060807        Expanding the 3*sw and 3*lw MIPS instruction combinations to
2919                    work with 2* and 4* too, resulting in a minor performance gain.
2920                    Implementing a usleep hack for the RM52xx/MIPS32/MIPS64 "wait"
2921                    instruction (when emulating 1 cpu).
2922    20060808        Experimenting with some more MIPS instruction combinations.
2923                    Implementing support for showing a (hardcoded 12x22) text
2924                    cursor in igsfb.
2925    20060809        Simplifying the NetBSD/evbmips (Malta) install instructions
2926                    somewhat (by using a NetBSD/pmax ramdisk install kernel).
2927    20060812        Experimenting more with the MIPS 'wait' instruction.
2928                    PCI configuration register writes can now be handled, which
2929                    allow PCI IDE controllers to work with NetBSD/Malta 3.0.1 and
2930                    NetBSD/cobalt 3.0.1. (Previously only NetBSD 2.1 worked.)
2931    20060813        Updating dev_gt.c based on numbers from Alec Voropay, to enable
2932                    Linux 2.6 to use PCI on Malta.
2933                    Continuing on Algor interrupt stuff.
2934    20060814        Adding support for routing ISA interrupts to two different
2935                    interrupts, making it possible to run NetBSD/algor :-)
2936    20060814-15     Testing for the release.
2937    
2938    ==============  RELEASE 0.4.2  ==============
2939    

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