vba-developement — VBA development discussion

[vba-developement] The compilation of "GBA.cpp" lasts > 2 hours in ARM arm1136

[dsdsdds <ds...@12...>]

I am compiling VisualBoyAdvance 1.8.0 beta 3 on linux, with an ARM 11 cpu.

The compilation of "GBA.cpp" lasts for > 2 hours, and "GBA.cpp" still seems
not to be compiled.

But if I comment the lines in "GBA.cpp" from line 2207 to the end, then the
compilation will be finished in 3 minutes.


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[vba-developement] A question about ComboBox

[Xue S. <app...@gm...>]

Hi everyone,
I need a simple VB demo, but I dont know much about VB. Hope someone can
answer my question. Thanks a lot in advance!

I have a ComboBox object ComboBox1 and some string data in text portion.
What I want to do is input text in ComboBox1, if the input tex has already
existed in the text portion, display relative items, if not add the input to
the text portion.

Here is an example,
In text portion, I have:
apple
apple1
abc
bac

If the first letter I enter is 'a', then it displays a list of
apple
apple1
abc

If the 2nd letter I enter is 'p', it shows
apple
apple1

Now I've already entered 'apple',  if the last letter is 1, no new item
will be added to the text portion, if not,e.g 'apple2', then apple2 is added
to the list.

Thank you very much again!!
Best,
Shan
-- 
Love. Peace. Music.

[vba-developement] VisualBoyAdvance Zombies

[Fabian S. <fab...@gm...>]

Hello,

I do not know whether this is a gdb or a VisualBoyAdvance issue, but
after detaching from VisualBoyAdvance within gdb a
VisualBoyAdvance-zombie remains in the system.

Ciao, Fabian Scheler

[vba-developement] VBA 1.7.2 GDB-Stub

[Fabian S. <fab...@gm...>]

Hello everybody,

I'd like to use VBA for the exercise of a lecture, a small real-time
operating system should be developed with the VBA, therefore I'd also
like to use the builtin GDB-stub. Unfortunately I was not able to do
this successfully up to now.

Connecting to the emulator, loading the application to the emulator
and instruction steps works fine, but I was not able to successfully
set a breakpoint at a source line and halt there. When I try this VBA
just runs over the breakpoint and when I try to interrupt the emulator
it is not possible to e.g. view the registers any more. I'm quite sure
the particular soure line is reached, as it is also reached, whe I
step there instruction by instruction.

I'm using arm-elf-gdb version 6.4 for debugging:

GNU gdb 6.4
Copyright 2005 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "--host=i686-pc-linux-gnu --target=arm-elf".

and I invoke VBA like this:

VisualBoyAdvance -Gtcp:10465

when setting breakpoints VBA produces messages like this:

Unknown packet pf#d6
Unknown packet vCont?#49

I guess these messages indicate the problem, don't they? Has the GDB
remote protocol evolved somehow, while the VBA GDB stub has not?

Thanks in advance - any hints are appreciated!

Ciao, Fabian

[vba-developement] Build problems: VBA from CVS

[Fabian S. <fab...@gm...>]

Hello everybody,

in a different post, I described some difficulties using VBA's GDB
stub. I hoped to evade those problems by switching to a brand new
version right out of the CVS tree ... well, again, I was not
successful :-(

I tried to built VBA under linux, using sdl as well as gtk, with and
without development features and encountered problems regarding the
macro BKPT_SUPPORT, zutil.h included by memgzio.h, some unknown
undeclared stuff in expr-lex.cpp and exprNode.cpp, however, I was not
able to sort them all out.

I had a look into the CVS history and discovered that there was some
acitivy in the win32 area of VBA and the VC project stuff - did these
changes render VBA uncompilable under linux? Is the linux port of VBA
still maintained?

Thanks in advance?

Ciao, Fabian

[vba-developement] Prefetch Emulation

[Labmaster <lab...@gm...>]

This is just a general question to the developers: What's the plan of
attack regarding Prefetch Emulation? As you may or may not know, the
'Emulator Detection' routines present in the NES Classic series, are
based on self-modifying code which exploit the prefetch 'feature' in
the processor (or lack thereof, in emulators). From NEiMOD's Tutorial:

-> 06000264  e28fe008 add lr, pc, #0x8
-> 06000268  e51f0010 ldr r0, [$06000260] (=$e3a01000)
-> 0600026c  e58e0000 str r0, [lr]
-> 06000270  e3a010ff mov r1, #0xff
-> 06000274  e3a010ff mov r1, #0xff

The code changes itself to

-> 06000274  e3a01000 mov r1, #0x00 

When the emulator reaches this point, it will read the instruction as
mov r1,#0x00. However, an actual GBA will have already fetched this
instruction, prior to the str at 0600026c, and will execute the
original mov r1,#0xff. Obviously a cmp will follow this, and if it is
equal to 0 then it will realise that it isn't running on hardware.

I guess emulating it correctly would result in a slowdown which may be
significant, so it wouldn't be a priority, but if these sorts of
routines are more common it could become problematic (ending up in
directing users to the patches from the various groups out there, who
I doubt you would want to openly associate with).

Anyway, just something to think about for the time being.

-Labmaster

lab...@gm...

[vba-developement] VBA Windows Installer

[Daniel L. <da...@ra...>]

Hi,

We have created a Win32 installer for VGA that we would like to contribute
to the project.
It displays the GPL, allows you to choose installation directory, creates
Start Menu entry, Desktop Shortcut, Uninstaller, etc.

You can download it from 
http://www.bitrock.com/vbadvance/visualboyadvance-1.7.2-windows-installer.exe

Please let us know what you think and if you run into any problems (the
installer has been tested in win9x/200/XP)

Best regards

Daniel