| 1 |
$Id: TODO,v 1.127 2005/04/15 21:39:54 debug Exp $ |
$Id: TODO,v 1.298 2006/06/25 11:08:04 debug Exp $ |
| 2 |
|
|
| 3 |
Here's a short list of what I have left to do on GXemul. This file is a mess. |
Hm. This file is in random order, and not all parts of it are up-to-date. |
|
Order is random. Don't trust it to be up-to-date. |
|
| 4 |
|
|
| 5 |
|
-------------- |
| 6 |
|
|
| 7 |
Caches / memory hierarchies: (this is mostly MIPS-specific) |
x) FIX THE NON-R3000 TRANSLATION CACHE INVALIDATION BOTTLENECKS! |
| 8 |
o) MIPS coproc.c: bits in config registers should reflect |
x) Find a way to get rid of the cpu_create_or_reset_tc in the |
| 9 |
correct cache sizes for _all_ CPU types. (currently only |
R2000/R3000 cache isolation code. (NetBSD works without it, |
| 10 |
implemented for R4000, R1x000, and a few others) |
but not Ultrix and Linux yet.) |
| 11 |
o) src/memory*.c: Implement correct cache emulation for |
x) Formalize the statistics gathering stuff for dyntrans... |
| 12 |
all CPU types. (currently only R2000/R3000 is implemented) |
x) ... and use it to optimize MIPS dyntrans stuff. |
| 13 |
(per CPU, multiple levels should be possible, |
x) Clock framework? Go through all clock devices, make sure they |
| 14 |
associativity etc!) |
return correct data, and run at correct speeds! |
| 15 |
o) R2000/R3000 isn't _100%_ correct, just almost correct :) |
x) Optimizations, continuing on 64-bit issues etc with dyntrans |
| 16 |
o) Move the -S (fill mem with random) functionality into the |
x) Dyntrans with SMP... lots of work to be done here. |
| 17 |
memory.c subsystem, not machine.c or wherever it is now |
x) Dyntrans with cache emulation... lots of work here as well. |
| 18 |
o) ECC stuff, simulation of memory errors? (Machine dependant) |
x) Actually use the settings object, better debugger stuff, etc. |
| 19 |
o) More than 4GB of emulated RAM, when run on a 32-bit host? |
x) Wait for new releases of NetBSD, and test with those. |
| 20 |
(using manual swap-out of blocks to disk, ugly) |
|
| 21 |
o) A global command line option should be used to turn |
-------------- |
| 22 |
cache emulation on or off. When off, caches should be |
|
| 23 |
faked like they are right now. When on, caches and |
SMP: |
| 24 |
memory latencies should be emulated as correctly as |
o) dev_mp doesn't work well with dyntrans yet |
| 25 |
possible. |
o) In general, IPIs, CAS, LL/SC etc must be made to work with dyntrans |
| 26 |
|
|
| 27 |
Network layer: |
MIPS: |
| 28 |
o) Multiple networks per emulation, and let different |
o) Fix invalidate_asid so it works well for non-R3000 too! |
| 29 |
NICs in machines connect to different networks. |
x) [Re]add an interrupt-asserted bit for MIPS, to speed up |
| 30 |
o) Network across multiple hosts. |
interrupt handling slightly? |
| 31 |
o) Fixed MAC addresses for NICs, fixed IPv4 addresses if |
+) Print a warning on the first reserved instruction. |
| 32 |
DHCP or RARP is used. |
+) Some more work on opcodes. |
| 33 |
o) many other issues: see src/net.c |
x) MIPS64 revision 2. |
| 34 |
|
x) _MAYBE_ TX79 and R5900 actually differ in their |
| 35 |
Configure script: |
opcodes? Check this carefully! |
| 36 |
o) Only enable Alpha prefetch on pca56 etc, not on ev4, ev5. |
o) Dyntrans: Count register updates are probably not 100% correct yet. |
| 37 |
o) Use getopts? |
o) Dyntrans: SMP correctness |
| 38 |
o) X11 libs and headers via command line option? |
o) Refactor code for performance and readability/maintainability. |
| 39 |
o) Verify that the configure script, building and running |
o) Instruction combinations? Possible candidates (but profile first!): |
| 40 |
the emulator works on some platforms: |
o) multiple loads/stores in a row |
| 41 |
+) Irix, AIX, QNX |
o) strlen, memset loops etc |
| 42 |
+) MacOS X (I've not tried this personally yet) |
o) compare + branch |
| 43 |
+) Ultrix using gcc? (Inside the emulator) |
o) DROTR32 and similar MIPS64 rev 2 instructions, which have |
| 44 |
|
a rotation bit which differs from previous ISAs. |
| 45 |
CPU emulation: |
o) EI and DI instructions for MIPS64/32 rev 2. NOTE: These are |
| 46 |
o) Binary translation: |
_NOT_ the same as for R5900! |
| 47 |
+) use an Intermediate Representation! |
o) R4000 and others: |
| 48 |
+) recursive translation? |
x) watchhi/watchlo exceptions, and other exception |
| 49 |
+) basic blocks instead of one-instruction? :) |
handling details |
| 50 |
+) on Alpha: don't assume pca56-like byte load/store? |
o) R10000 and others: (R12000, R14000 ?) |
| 51 |
+) write backends for UltraSparc and MIPS |
x) memory space, exceptions, ... |
| 52 |
+) see src/bintrans.c for more info |
x) use cop0 framemask for tlb lookups |
| 53 |
o) All the non-MIPS modes need a bit of work. |
(http://techpubs.sgi.com/library/tpl/cgi-bin/getdoc.cgi/hdwr/bks/SGI_Developer/books/R10K_UM/sgi_html/t5.Ver.2.0.book_284.html) |
| 54 |
|
|
| 55 |
MIPS CPU emulation: |
Dyntrans: |
| 56 |
o) Instructions: |
x) Move the mips_init_64bit_dummy_tables() etc calls into |
| 57 |
o) Regression tests (see tests/README for more info): |
src/cpu.c, for all 64-bit cpus? |
| 58 |
o) Floating point exception handling, and |
x) 64-bit "phystranslation" lookup as in 32-bit mode? Would probably |
| 59 |
add more instructions. |
help performance a bit. |
| 60 |
o) Finish the MIPS16 translator, and test it! |
x) Common fatal_abort() function, which drops into the debugger |
| 61 |
o) MIPS ISA I, II, III, IV |
without continuing. |
| 62 |
o) MIPS V (SIMD vector stuff?) |
x) INVALIDATION should cause translations in _all_ cpus to be |
| 63 |
o) MDMX (MIPS Digital Media Extension) |
invalidated, e.g. on a write to a write-protected page |
| 64 |
o) MIPS 3D |
(containing code) |
| 65 |
o) MIPS MT (Multi-thread stuff) (What's this?) |
x) better (formally defined) instr call statistics (-s command |
| 66 |
o) Warn about mis-used bit fields (ie bits that |
line option?), multiple different types? (virtual pc, physical pc) |
| 67 |
should be all zeroes, warn about if they are not)! |
x) Call/return hints? |
| 68 |
Both for coprocessor registers and for instruction |
x) 16-bit encodings? (MIPS16, ARM Thumb, SH3, ...) |
| 69 |
opcodes. |
x) H8? |
| 70 |
o) the special2 stuff is a mess right now |
x) Lots of other stuff: see src/cpus/README_DYNTRANS |
| 71 |
o) warn and/or cause exceptions for unimplemented |
x) true recompilation backend? think carefully about this, |
| 72 |
instructions (depending on CPU type) |
experiment in a separate project (not in GXemul) |
| 73 |
o) R2000/R3000: |
x) Remove the dyntrans_alignment_check functionality; although |
| 74 |
x) R3000 "tri-byte stores". (What's this?) |
it gives slightly higher peformance sometimes, it increases |
| 75 |
o) R4000 and others: |
the complexity of the code too much! |
| 76 |
x) watchhi/watchlo exceptions, and other exception |
|
| 77 |
handling details |
Alpha: |
| 78 |
o) R10000 and others: (R12000, R14000 ?) |
o) Virtual memory (tlbs etc) |
| 79 |
x) memory space, exceptions, ... |
o) Get {NetBSD,OpenBSD,Linux}/alpha booting. :) |
| 80 |
x) use cop0 framemask for tlb lookups |
|
| 81 |
(http://techpubs.sgi.com/library/tpl/cgi-bin/getdoc.cgi/hdwr/bks/SGI_Developer/books/R10K_UM/sgi_html/t5.Ver.2.0.book_284.html) |
SPARC: |
| 82 |
o) Implement load delays? Warnings on interlocks. |
o) Add all registers (floating point, control regs etc) |
| 83 |
o) Implement all coprocessor 0 bits / functions. |
o) Save/restore register windows etc! |
| 84 |
x) coproc 0 selectors! (R4000 ?) |
o) Disassemly of some more instructions. |
| 85 |
o) R4300 (nintendo64, no mmu?), R5900 (playstation2, weird |
o) Are sll etc 32-bit sign-extending or zero-extending? |
| 86 |
TLB/cache? 128-bit GPRs, new instructions), |
o) Finish the cmp (subcc) flag computation code. |
| 87 |
4K (note: NOT R4000), 5K (note: NOT R5000), |
o) Finish the GDB register stuff. |
| 88 |
R6000 (ISA II), R8000 |
|
| 89 |
o) Multi-cpu stuff: |
Debugger: |
| 90 |
+) SGI's NUMA architecture. Study |
o) How does SMP debugging work? Does it simply use "threads"? |
| 91 |
x) Linux sources |
What if the guest OS (running on an emulated SMP machine) |
| 92 |
x) SGI's specs on NUMA address space |
has a usertask running, with userland threads? |
| 93 |
+) Ultrix? NetBSD doesn't do SMP on MIPS yet :-( |
o) Try to make the debugger more modular and, if possible, reentrant! |
| 94 |
+) Own experiments with ycx2. |
o) Remove the emul command? (But show network info if showing |
| 95 |
|
machines?) |
| 96 |
Emulation of specific machines and devices: |
o) Generalize the expression evaluator. (debugger_expr.c?) |
| 97 |
o) Clean up stuff to make it possible to emulate multiple |
settable variables ("show nr of instructions on average") |
| 98 |
(different) machines simultaneously. |
emul[x] defaults to current emul |
| 99 |
o) Use same clock for all emulations and machines. |
machine[x] defaults to current machine |
| 100 |
o) Clean up the device stuff (registering of devices etc) |
cpu[x] defaults to currently focused cpu |
| 101 |
o) Various SCSI and IDE controllers |
registers cpu arch dependent (#-prefix) |
| 102 |
o) PS/2-style keyboard controller (for several machines) |
symbols @-prefix |
| 103 |
o) Generic busses; |
numeric constants decimal, hex, and octal ($-prefix) |
| 104 |
x) PCI: i/o and interrupts |
boolean yes,no, true,false |
| 105 |
x) QBus-22 (DECsystem 5500, 5400?) |
operators (+ - * / % & | ^ !) |
| 106 |
o) DECstations (pmax): |
parentheses for grouping subexpressions |
| 107 |
x) ioasic |
NOTE: the change from % to # for register prefix! |
| 108 |
x) framebuffers: |
examples: |
| 109 |
+) better cursor support, overlays?, |
emul[0].machine[2].cpu[0].pc |
| 110 |
+) 2D/3D acceleration, PX[G] |
machine[test2].cpu[1].ra = main |
| 111 |
x) status words / control words, make this more |
settings.show_trace_tree = yes |
| 112 |
portable/cleaner |
|
| 113 |
x) scsi controller(s): sii, DMA for asc |
Settings: |
| 114 |
x) serial controllers: ssc, scc (and more work on dc?) |
o) Remove a setting. |
| 115 |
x) nvram on decstation 5000/125: when using X11, |
o) Read/write a setting given a name. (Read as |
| 116 |
set console=g or similar |
string and/or int64_t simultaneously?) |
| 117 |
x) DECstation 5840? "xbi-based SMP" |
|
| 118 |
o) SGI and ARC machines (sgimips, arc): |
Help command should have subsections! One for "expressions", |
| 119 |
x) IP32 ("O2"): (Lots of stuff) |
mirrored in the documentation, but the internal help should |
| 120 |
+) mec (ethernet) |
be the one that should be considered correct. |
| 121 |
+) pci |
o) see src/debugger.c for more |
| 122 |
+) ahc (scsi) |
|
| 123 |
+) ps2 kbd |
POWER/PowerPC: |
| 124 |
+) memory controller |
x) PPC optimizations; instr combs |
| 125 |
+) framebuffer/graphics |
x) 64-bit stuff |
| 126 |
+) caches |
x) find and fix the bug which causes NetBSD/macppc to fail after |
| 127 |
x) more ARCBIOS stuff |
an install! |
| 128 |
x) Memory/interrupt controllers |
x) macppc: adb controller; keyboard (for framebuffer mode) |
| 129 |
x) IP30 (Linux with graphics support?) |
x) make OpenBSD/macppc work (PCI controller stuff) |
| 130 |
x) SMP / NUMA? (SGI and various ARC machines) |
|
| 131 |
o) Playstation 2: |
Algor: |
| 132 |
Hardware: OHCI usb controller, keyboard, ... |
PCI and ISA and LOCAL interrupts! --> wdc could start working |
| 133 |
o) Cobalt: PCI and interrupt system, ethernet, |
Add interrupt controller in dev_algor.c. |
| 134 |
harddisk controller(s) |
|
| 135 |
o) Less interesting platforms: |
ARM: |
| 136 |
o) newsmips: |
o) try to get netbsd/evbarm 3.x running (iq80321) |
| 137 |
o) NetBSD/newsmips, get it to detect a "real" |
o) make the xscale counter registers (ccnt) work |
| 138 |
model, right now everything is 100% bogus |
o) make the ata controller usable for FreeBSD! |
| 139 |
o) mipsco? (NetBSD) |
o) zaurus for openbsd... |
| 140 |
o) wgrisc? (big endian R3000, in OpenBSD's attic) |
o) debian/cats crashes because of unimplemented coproc stuff. |
| 141 |
o) other embedded / evaluation MIPS boards |
fix this? |
| 142 |
o) Playstation 1? R3000A. Weird hardware? |
|
| 143 |
No FPU, but something as coproc 2. |
Cache simulation: |
| 144 |
o) Nintendo 64, http://www.nintendo.com/systems/n64/n64_specs.jsp |
o) Separate from the CPU concept, so that multi-core CPUs sharing |
| 145 |
(R4300, 4MB RAM, really weird memory map) |
e.g. a L2 cache can be simulated (?) |
| 146 |
o) non-MIPS |
o) Instruction cache emulation is easiest (if separate from the |
| 147 |
|
data cache); similar hack as the S;I; hack in cpu_dyntrans.c. |
| 148 |
File/disk handling: |
NOTE: if the architecture has a delay slot, then an instruction |
| 149 |
o) More than one type of disk in a machine (say, IDE + FLOPPY, |
slot can actually be executed as 2 instructions. |
| 150 |
or SCSI + IDE); how to handle this nicely? |
o) Data cache emulation = harder; each arch's load/store routines |
| 151 |
o) Read function argument count and types from binaries? (ELF?) |
must include support? running one instruction at a time and |
| 152 |
o) ELF: separate LE/BE (MIPS instruction format) from LSB/MSB |
having a cpu-dependant lookup function for each instruction |
| 153 |
(ELF structure format)? |
is another option (easier to implement, but very very slow). |
| 154 |
o) Better handling of tape files |
|
| 155 |
|
Documentation: |
| 156 |
Userland ABI emulation: |
o) machines, cpus, devices. |
| 157 |
o) see src/useremul.c |
o) Automagic documentation generation: |
| 158 |
|
x) REMEMBER that several machines/devices can be in |
| 159 |
Terminal based interactive debugger: |
the same source file! |
| 160 |
o) see src/debugger.c |
o) Try to rewrite the install instructions for those machines |
| 161 |
|
that use 3MAX into using CATS? (To remove the need to a raw |
| 162 |
GDB interface? (Maybe not necessary; the built-in debugger feels |
ffs partition using up all of the disk image.) |
| 163 |
more useful.) |
|
| 164 |
|
More generic out_of_memory error reporting, and check everywhere! |
| 165 |
GUI, interactive debugger? GTK+? (The GUI _must be optional_!) |
Causes: OpenBSD has low default limits for normal users. |
| 166 |
o) Breakpoints (complex expressions? combinations of register |
Host is 32-bit? (32-bit hosts are limited to 4 GB or less |
| 167 |
states, memory accesses and so on) |
of userspace memory.) |
| 168 |
o) Instruction trace |
You are actually low on RAM. (As trivial as this might sound, |
| 169 |
o) Disassembly of RAM (_NOT_ the same as instruction trace) |
Unix systems usually allow processes to allocate virtual |
| 170 |
o) Function call trace |
memory beyond the amount of RAM in the machine.) |
| 171 |
o) Inspection of CPU registers/state, coprocessor |
|
| 172 |
registers/state, any device registers/state/contents |
Breakpoints: 32-bit vs 64-bit sign extension for MIPS, warnings, etc. |
| 173 |
o) Framebuffers in windows / tabs. |
Use the debugger's symbolic name stuff. (which will have to be |
| 174 |
o) Contents of RAM |
extended soon to support stuff like "2*x + symbol + y" etc. cool |
| 175 |
o) "Start new emulation" should allow amount of |
stuff) |
| 176 |
RAM and nr of cpus to easily be specified. |
|
| 177 |
Multiple simultaneous machines should be possible. |
Sprite (guest OS for DECstation emulation) |
| 178 |
o) Disk images. |
x) Timing problems during bootup? |
| 179 |
|
|
| 180 |
Regression tests: |
The Device subsystem: |
| 181 |
o) see tests/ |
x) allow devices to be moved and/or changed in size (down to a |
| 182 |
|
minimum size, etc, or up to a max size) |
| 183 |
Save state of the whole emulated machine, to be able to load it back |
x) keep track of interrupts and busses? actually, allowing any device |
| 184 |
in later? (Memory, all device's states, all registers and |
to be a bus might be a nice idea. |
| 185 |
so on. Like taking a snapshot. (SimOS seems to do this, |
x) turn interrupt controllers into devices? :-) |
| 186 |
according to its website.)) |
x) refactor various clocks/nvram/cmos into one device? |
| 187 |
|
|
| 188 |
Better X-windows functionality: |
Clocks: |
| 189 |
o) CLEAN UP the ugly event code |
x) General framework for automagic clock adjustment for _all_ |
| 190 |
o) Mouse clicks can be "missed" in the current system; this is |
kinds of clocks and timers. (Which should be possible to turn |
| 191 |
not good. They should be put on a stack of some kind. |
off, of course, like the way DECstation emulation works now.) |
| 192 |
o) More 2D and 3D framebuffer acceleration. |
|
| 193 |
o) Non-resizable windows? Or choose scaledown depending |
PCI: |
| 194 |
on size (and center the image, with a black border). |
x) last write was ffffffff ==> fix this, it should be used |
| 195 |
o) Different scaledown on different windows? |
together with a mask to get the correct bits. also, not ALL |
| 196 |
o) Switch scaledown during runtime? (Ala CTRL-ALT-plus/minus) |
bits are size bits! (lowest 4 vs lowest 2?) |
| 197 |
o) Keyboard and mouse events: |
x) add support for address fixups |
| 198 |
x) Do this for more machines than just DECstation |
x) generalize the interrupt routing stuff (lines etc). this should |
| 199 |
x) more X11 cursor keycodes |
be per machine? or per bus, that's better |
| 200 |
x) Keys like CTRL, ALT, SHIFT do not get through |
x) add a "pcn" NIC (AMD PCnet32 Lance 79c970 (PCI 1022:2000)), |
| 201 |
by themselves (these are necessary for example |
could be useful for several machine modes (Malta, Algor, evbarm, |
| 202 |
to change the font of an xterm in X in the |
hp700?, macppc, etc.) |
| 203 |
emulator) |
|
| 204 |
o) Generalize the framebuffer stuff by moving _ALL_ X11 |
Network layer: |
| 205 |
specific code to src/x11.c! |
o) DHCP (for Debian and BSD installers :-) |
| 206 |
|
o) increase performance |
| 207 |
Statistics: (this could be interesting) |
o) don't rely on NetBSD-ish usage |
| 208 |
o) Save to file and show graphics. It should be possible to |
o) Multiple networks per emulation, and let different |
| 209 |
run gxemul after a simulation to just show the graphics, |
NICs in machines connect to different networks. |
| 210 |
or convert to a .ppm or .tga or similar. |
o) many other issues: see src/net.c |
| 211 |
o) memory accesses (to measure cache efficiency and |
|
| 212 |
page coloring efficiency) |
Busses: |
| 213 |
o) nr of simultaneous ASIDs in use in the TLB, for MIPS |
o) Redesign the entire "mainbus" concept! |
| 214 |
o) percentage of time spent in different "states", such as |
o) Busses should be placed in a hierarchical tree! |
| 215 |
running userland code, kernel code, or idling (for CPUs |
o) Easily configurable interrupt routing in SMP systems. |
| 216 |
that have such an instruction, or whenever the PC is |
o) Specific clock/bus speeds, cpu speeds etc. |
| 217 |
inside a specific idle-function (address range)). |
o) Synchronization over network? or at least in dyntrans within |
| 218 |
Possible additional state (for example on R3000): caches |
one emulated machine |
| 219 |
disabled. |
o) dev->bus: TurboChannel, PCMCIA, ADB? |
| 220 |
o) position of read/write on (SCSI) disks |
|
| 221 |
|
Config file parser: |
| 222 |
|
o) Rewrite it from scratch! |
| 223 |
|
o) Usage of any expression available through the debugger |
| 224 |
|
o) Support for running debugger commands (like the -c |
| 225 |
|
command line option) |
| 226 |
|
|
| 227 |
|
Floating point layer: |
| 228 |
|
o) make it common enough to be used by _all_ emulation modes |
| 229 |
|
o) implement more stuff |
| 230 |
|
o) non-IEEE modes (i.e. x86)? |
| 231 |
|
|
| 232 |
|
Userland emulation: |
| 233 |
|
x) Lots of stuff; freebsd and netbsd (and linux?) syscalls. |
| 234 |
|
x) Dynamic linking? Hm. |
| 235 |
|
|
| 236 |
|
Sound: |
| 237 |
|
x) generic sound framework |
| 238 |
|
x) add one or more sound cards as devices |
| 239 |
|
|
| 240 |
|
ASC SCSI controller: |
| 241 |
|
x) NetBSD/arc 2.0 uses the ASC controller in a way which GXemul |
| 242 |
|
cannot yet handle. (NetBSD 1.6.2 works ok.) (Possibly a problem |
| 243 |
|
in NetBSD itself, http://mail-index.netbsd.org/source-changes/ |
| 244 |
|
2005/11/06/0024.html suggests that.) |
| 245 |
|
|
| 246 |
|
Caches / memory hierarchies: (this is mostly MIPS-specific) |
| 247 |
|
o) MIPS coproc.c: bits in config registers should reflect |
| 248 |
|
correct cache sizes for _all_ CPU types. (currently only |
| 249 |
|
implemented for R4000, R1x000, and a few others) |
| 250 |
|
o) src/memory*.c: Implement correct cache emulation for |
| 251 |
|
all CPU types. (currently only R2000/R3000 is implemented) |
| 252 |
|
(per CPU, multiple levels should be possible, |
| 253 |
|
associativity etc!) |
| 254 |
|
o) R2000/R3000 isn't _100%_ correct, just almost correct :) |
| 255 |
|
o) Move the -S (fill mem with random) functionality into the |
| 256 |
|
memory.c subsystem, not machine.c or wherever it is now |
| 257 |
|
o) ECC stuff, simulation of memory errors? (Machine dependent) |
| 258 |
|
o) More than 4GB of emulated RAM, when run on a 32-bit host? |
| 259 |
|
(using manual swap-out of blocks to disk, ugly) |
| 260 |
|
o) A global command line option should be used to turn |
| 261 |
|
cache emulation on or off. When off, caches should be |
| 262 |
|
faked like they are right now. When on, caches and |
| 263 |
|
memory latencies should be emulated as correctly as |
| 264 |
|
possible. |
| 265 |
|
|
| 266 |
|
File/disk/symbol handling: |
| 267 |
|
o) Better handling of tape files |
| 268 |
|
o) Read function argument count and types from binaries? (ELF?) |
| 269 |
|
o) Better demangling of C++ names. Note: GNU's C++ differs from e.g. |
| 270 |
|
Microsoft's C++, so multiple schemes must be possible. See |
| 271 |
|
URL at top of src/symbol_demangle.c for more info. |
| 272 |
|
|
| 273 |
|
Userland ABI emulation: |
| 274 |
|
o) see src/useremul.c |
| 275 |
|
|
| 276 |
|
Terminal/console: |
| 277 |
|
o) allow emulated serial ports to be connected to the outside |
| 278 |
|
world in a more generic way, or even to other emulated |
| 279 |
|
machines(?) |
| 280 |
|
|
| 281 |
|
Save state of the whole emulated machine, to be able to load it back |
| 282 |
|
in later? (Memory, all device's states, all registers and |
| 283 |
|
so on. Like taking a snapshot. (SimOS seems to do this, |
| 284 |
|
according to its website.)) |
| 285 |
|
|
| 286 |
|
Better framebuffer and X-windows functionality: |
| 287 |
|
o) -Yx sometimes causes crashes. |
| 288 |
|
o) Simple device access to framebuffer_blockcopyfill() etc, |
| 289 |
|
and text output (using the built-in fonts), for dev_fb. |
| 290 |
|
o) CLEAN UP the ugly event code |
| 291 |
|
o) Mouse clicks can be "missed" in the current system; this is |
| 292 |
|
not good. They should be put on a stack of some kind. |
| 293 |
|
o) More 2D and 3D framebuffer acceleration. |
| 294 |
|
o) Non-resizable windows? Or choose scaledown depending |
| 295 |
|
on size (and center the image, with a black border). |
| 296 |
|
o) Different scaledown on different windows? |
| 297 |
|
o) Switch scaledown during runtime? (Ala CTRL-ALT-plus/minus) |
| 298 |
|
o) Bug reported by Elijah Rutschman on MacOS with weird |
| 299 |
|
keys (F5 = cursor down?). |
| 300 |
|
o) Keyboard and mouse events: |
| 301 |
|
x) Do this for more machines than just DECstation |
| 302 |
|
x) more X11 cursor keycodes |
| 303 |
|
x) Keys like CTRL, ALT, SHIFT do not get through |
| 304 |
|
by themselves (these are necessary for example |
| 305 |
|
to change the font of an xterm in X in the |
| 306 |
|
emulator) |
| 307 |
|
o) Generalize the framebuffer stuff by moving _ALL_ X11 |
| 308 |
|
specific code to src/x11.c! |
| 309 |
|
|
| 310 |
|
Statistics: (this could be interesting) |
| 311 |
|
o) Save to file and show graphics. It should be possible to |
| 312 |
|
run gxemul after a simulation to just show the graphics, |
| 313 |
|
or convert to a .ppm or .tga or similar. |
| 314 |
|
o) memory accesses (to measure cache efficiency and |
| 315 |
|
page coloring efficiency) |
| 316 |
|
o) nr of simultaneous ASIDs in use in the TLB, for MIPS |
| 317 |
|
o) percentage of time spent in different "states", such as |
| 318 |
|
running userland code, kernel code, or idling (for CPUs |
| 319 |
|
that have such an instruction, or whenever the PC is |
| 320 |
|
inside a specific idle-function (address range)). |
| 321 |
|
Possible additional state (for example on R3000): caches |
| 322 |
|
disabled. |
| 323 |
|
o) position of read/write on (SCSI) disks |
| 324 |
|
|
Parent Directory
| 
Revision Log
| 
Patch