DSx86 v0.12 Beta - 模擬器

http://dsx86.patrickaalto.com/

DSx86 v0.12 Beta is released. DSx86 is a PC emulator for Nintendo DS. It's
purpose is to allow you to run old DOS games on your Nintendo DS game console.

DSx86 v0.12 Beta Changelog:

This version has a long list of changes, but they are mostly minor fixes and
improvements. Here is the list:

* New EGA 640x350x16 and VGA 640x480x16 graphics modes.
* The NDS shoulder buttons scroll the zoomed screen left/right (as before)
when not already at the edge, and up/down after that.
* Fixed Master of Orion SB digital audio problems.
* Changed EGA text output to use INT43 vector (fixes text problems in Space
Quest I, etc).
* Fixed EGA Read Mode 1 handling (DOUBOLO).
* Improved EGA palette handling (ZOOL).
* Fixed WC2 savegame handling, which was broken by the DUNE2 savegame
handling fix. They call the same DOS function, but expect it to behave
differently. Argh!
* Added support for INT03 (see previous blog post) and INTO (overflow
interrupt).
* Implemented Mode-X VGA offset handling (Alien Breed, Traffic Department
2192).
* Implemented diskette motor counter handling to INT8 (should fix
Civilization hang problem).
* Added about a dozen new EGA graphics opcodes.
* Added about a dozen new Mode-X graphics opcodes.
* Added support for several new DOS and Mouse interrupts.
* Added support for several new I/O ports.
* Added most of the previously missing characters to the 6x8 text mode font.
* Attempt to avoid writing duplicate entries to the debug log.
* Ignore SB Direct DAC output for now, pending proper implementation.

RyouArashi has created a small DSx86 configuration program that runs in DOS,
so you can run it inside DSx86! Makes it easy to configure the settings for
various games when you can do everything on your Nintendo DS. The link to the
Google Code page for this software is on my Download page.

I have spent a lot of time debugging some more difficult problems, especially
on Saturday, but was not able to fix most of them. It seems that DSx86 is
currently not compatible with R4 Slot-1 DS cards, for some reason. I tried to
use iDeaS emulator with DSx86 patched with the R4 DLDI driver, and I get the
same problems as some R4 users have reported. The most frustrating thing is
that I can not get neither the iDeaS or the DSx86 inbuilt debugger to work
properly, so I can not debug the problem! So, looks like this version of
DSx86 will still not work properly with R4 devices, sorry.

I also debugged various other games that have been reported misbehaving, like
Jimmy Whites Whirlwind Snooker and Moonstone. The first one has a similar
problem to the one that causes the "Packed file corrupt", message, that is,
the segment register wraps downward to 0xFDE0 or something like that, and it
will then start writing data to invalid locations in memory, corrupting some
DSx86 internal data areas as well. This would probably need a proper LOADFIX
implementation to work. I haven't yet figured out the problem in Moonstone
where it hangs the touchscreen. Usually such hanging is caused by ARM7
crashing, but it still plays audio fine after this, so I'm not sure what
happens there. I have narrowed down the situation where this happens, so a
couple of hours worth of debugging should tell me where the problem is.

There are many issues with the mouse emulation, especially with the touchpad
mouse emulation, but those I have not looked into at all yet. I hope to make
a lot of improvements to the mouse emulation in the next version. Also,
Windows 2.03 wants to use PS/2 mouse, which I don't support yet, so don't be
surprised that mouse does not work if you try running Windows 2.03 on this
version.

Thanks to all of you who sent me debug logs, this time I think I actually
managed to implement fixes from nearly all of the logs I have received. There
are still issues needing fixing from the earlier logs I have recieved, but
I'm starting to catch up so that my TODO list does not keep growing larger
and larger by each release!

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