#NEO GEO SAMURAI SHODOWN II ROMS DRIVERS#
#NEO GEO SAMURAI SHODOWN II ROMS SOFTWARE#

22nd February 2005: Guru - SNK Hyper Neo Geo 64 driving-style main board just arrived. I do think I'm onto something though, because when the players move around the groundplane moves and rotates correctly - it's just a matter of figuring out the finishing touches. The implementation isn't complete yet - I'm ignoring 32 bits per coordinate and my implementation fails miserably when the camera points down.

#NEO GEO SAMURAI SHODOWN II ROMS SOFTWARE#

Anyways, hopefully as we improve the emulation further, we'll see how other software uses it. The rasterizer probably also messes up the textures pretty badly on large polys because of an assumed lack of perspective-correct texture mapping (?). To give the hardware designers credit, it may have been necessary to include this specialized 'textured plane-drawer' since the hng64 polygon rasterizer is probably very slow when drawing large triangles. Quite spiffy to be sure, but I can't figure out anything this would be used for except rendering planes. You can then rotate the sample-lines to make the floor appear as it's rotating, or scale the sample-line lengths to make it look like the floor's moving further away. If, instead, you wanted something interesting, you'd ask for lines calculated based on a perspective projection into the tilemap.

So if you wanted an orthographic projection of the tilemap, you'd ask for a line from (0, 0) to (2048, 0), then a line from (0, 1) to (2048, 1), then one from (0, 2) to (2048, 2), and so on. Basically, they load up a 2048x2048 pixel tilemap and then sample it based on lines drawn through it. The way the hng64 does this is pretty strange (but quite cool). This enables the floor in fatal fury wild ambition! Pay close attention to the recognizable features on the floor (like the stars) as they're foreshortened by perspective effects. 28th August 2005: Andrew Gardner - I've come dangerously close to implementing the 'linescroll' feature of the hng64. Disabled the drc MIPS3 core until MMU support is added there as well.

#NEO GEO SAMURAI SHODOWN II ROMS DRIVERS#

Converted the Killer Instinct, Seattle, Vegas, and Hyper Neo-Geo 64 drivers to a proper physical memory layout. 0.101u2: Aaron Giles added MMU support to the non-drc MIPS3 emulator. Work out what other unknown areas of ram are for and emulate. (why does ff have a corrupt 'easy' string in test mode?) Hook up CPU2 (v30 based?) no rom? (maybe its the 'sound driver' the game uploads?) Fix communications CPU (z80 based, we have bios rom)

Fix remaining 2d graphic glitches: Scroll (base registers?), roz (4th tilemap in fatal fury should be floor, background should zoom), find registers to control tilemap mode (4bpp/8bpp, 8x8, 16x16), fix zooming sprites (zoom registers not understood, definatley differs between games - center versus edge pivot), priorities and still some bad sprites (waterfall level 'splash' - health bar at 50% - intro top and bottom). Make ss64 boot (io return 3 then 4 not just 4) then work out where the palette is (mmu?) Figure out what 'network' Road Edge needs to boot, it should run as a standalone Work out the purpose of the interrupts and how many are needed This most likely relies on the z80-like cpu Clean up I/O implementation, currently it only 'works' with Fatal Fury WA, it has issues with the coins and causes the startup checks to fail. Determine wether or not the hardware does perspective-correct texture mapping - if not, disable it in the rasterizer.

Populate the display buffers (A&B) with the data based on Elsemi's notes below maybe there are some frame-buffer effects which will then work The effect of numerous (dozens of) 3d flags needs to be figured out by examining real hardware It's been thought the display list may be FIFO - this may tie into the BufferA and BufferB thing look into it! Complete display lists are not currently found in the dl_w memory handler (this manifests itself as 'flickering' 3d in fatfurwa and missing bodies in buriki.

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