Ds Emulator Download For Mac10/13/2021
Various display position/sizing/rotation modes Nintendo DS is one of the largest selling Handheld Gaming consoles ever, and has great. )Download EmuBox - Fast NDS Emulator apk for PC/Mac/Windows 7,8,10. Nearly complete core (CPU, video, audio. Game Soundtracks (MP3) High Quality Soundtracks. GBA Emulators (19) NDS Emulators (22) PSX Emulators (33) PSP Emulators (9) PS2 Emulators (14) N64 Emulators (14) GCN Emulators (16) SNES Emulators (29) MAME Emulators (71) NES Emulators (17) View all Emulators Gamer Goodies Gaming Music.The RAM size register is mainly used to restrict the accessible main RAM to 4MB before launching a DS game. I felt like looking at another of the known DSi-mode issues: the fact that we currently don't implement the RAM size register in SCFG_EXT9. The issue was another unimplemented AES feature, and was fixed in melonDS 0.9.3.Sometimes I wish all issues were this simple. One example of a fun issue that had been reported a while ago: the DSi menu would freeze after the health/safety screen if any pictures were stored that could be displayed on the top screen. Not just in the sense of running DSi games faithfully: a good reproduction of the DSi environment is also useful to would-be homebrewers.However, the road to DSi emulation is paved with all sorts of challenges. Sometimes notYou might have noticed that one of my goals for the 1.0 release is to get DSi mode in melonDS up to par with DS mode.
Ds Emulator Code Works FineMy first tests were to see if there was any kind of secret register altering main RAM mapping somehow, but there was none. Oh and the ARM9 caches are disabled when the loader is running, so they don't come into play here.So I made a homebrew that reproduced the loader code: same ASM code, same memory regions, same everything. The RAM size gets changed instantly on both sides, and there's nothing fancy about memory mapping either. As a result, the ARM9 changes the main RAM size while the ARM7 is still clearing regions, causing it to overwrite the ARM9's code, and you guess how this goes: kaboom.Yet, the same code works fine on hardware.I had already experimented with the RAM size register, to try and find out if there's anything fancy about it, but there's nothing special at all. However, while the ARM7 has a bunch of regions in main RAM to clear, the ARM9 is given empty copy/clear lists, and all it has to do is clear its DTCM, which is quickly done. In practice, however, there is an issue that kept us from enabling that feature: when it's enabled, the DSi launcher crashes when launching a DS game, while they would otherwise run fine (albeit with the full 16MB RAM instead of the 4MB they might expect).As explained in GBAtek, nocash ran into the same issue:SCFG_EXT9.bit14-15 affect the Main RAM mapping on ARM9 and ARM7 side (that, at least AFTER games have been booted, however, there's a special case DURING boot process: For NDS games, the firmware switches to 4MB mode on ARM9 side, whilst ARM7 is still relocating memory from the 16MB area at the same time - unknown how that is working exactly, maybe ARM7 isn't affected by SCFG_EXT9 setting until ARM7 has configured/disabled its own SCFG_EXT7 register).The basic process of the loader is as follows: the ARM9 syncs with the ARM7 via IPCSYNC, then both CPUs run through lists of memory areas to copy or clear, then the ARM9 changes the main RAM size if required.We also added support for touchscreen devices (tablets etc).On the emulation side, we added support for audio interpolation, as an optional emulation improvement. A lot.15 comments (last by poudink) | Post a commentWe bring you melonDS 0.9.3, a tad late, but it comes with a good deal of improvements.First of all, we fixed touchscreen input, it should now work as expected in all screen modes. The ARM9 code is running in main RAM, and the ARM7 has a bunch of main RAM regions to copy and clear: as EXMEMCNT is set to give priority over main RAM to the ARM7, the concurrent accesses are slowing down the ARM9.![]() It is also possible to boot DSi games and homebrew directly now, although this feature is still experimental. Namely, touchscreen calibration is now automatically patched in DSi mode, eliminating the need for a recalibration. Hell, we even managed to make the DS play a song solely by regularly changing SOUNDBIAS.There have been several improvements to DSi mode too. Emulating this register means nothing for the average game, but it could be used for cool tricks in homebrew. This goes hand in hand with emulation of the SOUNDBIAS register, too. There are multiple interpolation types to choose from, so you can see which one you like best.We also added a setting to optionally degrade the audio output to 10-bit, like the actual DS, for more authentic experience. Easy peasy.However, in DSi mode, it's another story. When booting, melonDS also patches the user's firmware data with its own adequate calibration data, so that no recalibration is required and the touchscreen Just Works(tm). It uses its own conversion, basically just multiplying the touchscreen pixel coordinates by 16 to make decent 'raw' coordinates. Every touchscreen digitizer is going to have a slightly different range, which is why users have to calibrate their touchscreen.MelonDS makes up for that in a very simple fashion. Calibration data is then used to convert these readings to pixel coordinates. ![]() ![]()
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