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bsnes-emu / bsnes

bsnes is a Super Nintendo (SNES) emulator focused on performance, features, and ease of use.
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bsnes changelog 2010 #209

Closed Max833 closed 3 years ago

Max833 commented 3 years ago

So that we can also find results with the github search and do not have to search on another site. Source: https://gitlab.com/higan/bsnes-history-kit/-/blob/master/sources/tukuyomi/misc/bsnes_changelog.txt

2010-12-26 - bsnes_v073r01.tar.bz2 (Windows 32-bit compatibility binary included) While perhaps not perfect, pretty good is better than nothing ... I've added emulation of auto-joypad poll timing. Going off ikari_01's confirmation of what we suspected, that the strobe happens every 256 clocks, I've set up emulation as follows: Upon reset, our clock counter is reset to zero. At the start of each frame, our poll counter is reset to zero. Every 256 clocks, we call the step_auto_joypad_poll() function. If we are at V=225/240+ (based on overscan setting), we check the poll counter. At zero, we poll the actual controller and set the joypad polling flag in $4212.d0 to 1. From zero through fifteen, we read in one bit for each controller and shift it into the register. At sixteen, we turn off the joypad polling flag. The 256-clock divider allows the start point of polling for each frame to fluctuate wildly like real hardware. I count regardless of auto joypad enable, as per $4212.d0's behavior; but only poll when it's actually enabled. I do not consume any actual time from this polling. I honestly don't know if I even should, or if it manages to do it in the background. If it should consume time, then this most likely happens between opcode edges and we'll have to adjust the code a good bit. All commercial games should continue to work fine, but this will likely break some hacks/translations not tested on hardware. Without the timing emulation, reading $4218-421f before V=~228 would basically give you the valid input controller values of the previous frame. Now, like hardware, it should give you a state that is part previous frame, part current frame shifted into it. Button positions won't be reliable and will shift every 256 clocks. I've also removed the Qt GUI, and renamed ui-phoenix to just ui. This removes 400kb of source code (phoenix is a lean 130kb), and drops the archive size from 564KB to 475KB. Combined with the DSP HLE, and we've knocked off ~570KB of source cruft from the entire project. I am looking forward to not having to specify which GUI is included anymore.

2010-12-24 - bsnes_v073.tar.bz2 This release marks a major step forward, offering full low-level emulation of all four DSP coprocessors based on the NEC uPD77C25 processor core. Many people were responsible for this milestone: Dr. Decapitator for the actual decapping and extraction; Lord Nightmare for the cartridges and some special analysis tools; myself, Jonas Quinn and Cydrak for the uPD77C25 emulation; and all of the donors who raised the necessary $1,000 for the necessary hardware and equipment needed to pull this all off. To say thanks to the donors, I am releasing the uPD77C25 emulation core to the public domain, so that everyone can benefit from it. All four DSP emulations will be improved by this by way of having realistic timing; the DSP-4 will benefit further as the high-level emulation was incomplete and somewhat buggy; and the DSP-3 will benefit the most as the high-levle emulation there was not complete enough to be playable. As a result, most notably, this means bsnes v073 is the first emulator to fully be able to play SD Gundam GX (J)! As bsnes' primary goal is accuracy, the LLE DSP support renders the old HLE DSP support obsolete. Ergo, I have removed the 166KB of HLE source code, and replaced it with the uPD77C25 core, which comprises a mere 20KB of source code. As this LLE module supports save states, this also means that for the first time, DSP-3 and DSP-4 games have save state support. On the other hand, this also means that to run any DSP game, you will need the appropriate program ROM. As these are copyrighted, I cannot distribute them nor tell you where to get them. All I can do is provide you with the necessary filenames and hashes. SHA256: Code: 5f2e5ed06b362be023b978b5978813ecb9a07c76592454b45c2a1ed17a0de349 dsp1.bin 4d42db0f36faef263d6b93f508e8c1c4ae8fc2605fd35e3390ecc02905cd420c dsp1b.bin 5efbdf96ed0652790855225964f3e90e6a4d466cfa64df25b110933c6cf94ea1 dsp2.bin 2e635f72e4d4681148bc35429421c9b946e4f407590e74e31b93b8987b63ba90 dsp3.bin 63ede17322541c191ed1fdf683872554a0a57306496afc43c59de7c01a6e764a dsp4.bin MD5SUM: Code: 4865ac61cd758b0f9383fe3d4d3b8694 dsp1.bin c8bfb983703a96e1c3d4683105112bc0 dsp1b.bin e500ec7f6005e78cb935eea5289c8cc4 dsp2.bin c037185c8bbef6313226200dbe5fd07f dsp3.bin fe85065a7023551b0d84941a094435ba dsp4.bin All of these files are exactly 8KB (8,192 bytes) in size. Changelog: