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Q-Marine
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Titel: DSEmu v0.0.2d
 Verfasst am: 25.03.2005, 16:03 Uhr
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AEP Team Member
Anmeldungsdatum: 04. Jul 2004
Beiträge: 5.914
Status: Offline
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Wieder ein Update für den NintendoDS/Gameboy Advance-Emulator DSEmu.
Das Change-Log findet ihr im erweiterten Text.
The NintendoDS/Gameboy Advance-Emulator DSEmu has been updated again.
Friday, 25th March 2005
I said I´d keep looking at the core, and I did. I ended up finding the major error relating to the jump-to-0 bug. I suspected that it was to do with the stack getting corrupted somehow, and with some good debugging help from various sources, I tracked it down to the stack pointer getting changed. It turns out that Thumb ADDSP-imm has a reciprocal mode, SUBSP-imm, encoded by the same first byte. Fix that, and suddenly nothing jumps to 0 anymore. Mind you, it´s still the case that nothing works.
Elsewhere, I´ve noticed that when the emulator is put into animated scanline mode, the output screen starts flashing like a madman. It´s because the MMX word-flip operation to turn the colours the right way up gets applied every scanline, to the same buffer as its previous output. After adding yet another output buffer, the screen no longer flashes in a psychedelic manner.
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