Supermodel Forum

Posted: **Mon Aug 21, 2017 12:30 pm**

Thought this deserved a separate thread. I don't think I've found anything particularly interesting yet but I do now recall that some games set model references that appear to point to VROM during the first display frames but which may not be polygon data. There are a couple of spots in Legacy3D.cpp where I even explicitly test for these addresses.

Fighting Vipers 2 performs a very basic set up of culling RAM during the first frame. I will paste the viewport node and culling node it points to here. I print both the integer and float value for each word.

Code: Select all: Viewport: 000000: 00000000 0.000000 000001: 01000000 0.000000 000002: 04800500 0.000000 <-- display list at 0x500 000003: 43fb4fc7 502.623260 000004: 00000000 0.000000 000005: bf64f92e -0.894427 000006: 3ee4f92e 0.447214 000007: 3f19999a 0.600000 000008: 3fb5fdbb 1.421806 000009: 3feed9e1 1.866024 00000a: 3f000000 0.500000 00000b: 3f000000 0.500000 00000c: 3ea9db1b 0.331750 00000d: 3f718087 0.943367 00000e: 3e8483f4 0.258819 00000f: 3f7746e9 0.965926 000010: 3ea9db1b 0.331750 000011: bf718087 -0.943367 000012: 3e8483f4 0.258819 000013: bf7746e9 -0.965926 000014: 060007bf 0.000000 000015: 00000000 0.000000 000016: 00802000 0.000000 000017: 00800100 0.000000 000018: 00000000 0.000000 000019: 00000000 0.000000 00001a: 00000000 0.000000 00001b: 00000003 0.000000 00001c: 00000000 0.000000 00001d: 00200600 0.000000 00001e: 002007c0 0.000000 00001f: 00000000 0.000000 000020: 00000000 0.000000 000021: 4e6e6b28 1000000000.000000 000022: 00000000 0.000000 000023: 3727c5ac 0.000010 000024: 00004c00 0.000000 000025: 00ffffab 0.000000

Code: Select all: Display list: 000500: 02040000 0.000000 <-- culling node at 0x40000 000501: 00000000 0.000000 ... Culling node: 040000: 80000412 -0.000000 040001: 00000000 0.000000 040002: 00000000 0.000000 040003: 20000000 0.000000 040004: 00000000 0.000000 040005: 00000000 0.000000 040006: 00000000 0.000000 040007: 017fff00 0.000000 <-- VROM model at 0x7fff00 (0x1fffc00 in bytes) 040008: 01000000 0.000000 040009: eab8eab8 -111775389383496413841719296.000000

Code: Select all: Data in VROM: 01fffc00h: 9E 28 FD A3 9E 37 08 3A 18 49 94 02 04 BF 39 08 01fffc10h: 2B 8E 02 99 84 77 81 81 0A 49 FF BF F7 3A 39 6C 01fffc20h: 07 3C 13 6C B7 77 05 08 00 86 F8 78 C7 A7 11 74 01fffc30h: 00 64 0D 63 08 6E 0F D3 B6 20 E7 06 6F 5A 11 AE 01fffc40h: 83 52 92 CC 64 19 FF 08 35 F9 2A 4C 74 69 01 B1 01fffc50h: F6 21 A6 70 F6 B5 EC 7C 80 61 F8 85 6A 05 8E CF 01fffc60h: 67 20 DE 7D CF DF 59 64 64 99 E8 3A 23 4E E3 8C 01fffc70h: 4D 81 27 00 53 4F AB 50 61 75 BD A1 7E 26 80 C7 01fffc80h: 51 A8 2A E0 67 38 0A 28 54 88 90 08 8C BF 1D 28 01fffc90h: DC 28 40 C8 0B D9 89 05 A3 E9 B7 37 56 C2 D1 C4 01fffca0h: 71 C8 DC F3 FA 94 25 82 10 1A D8 04 40 5F 33 68 01fffcb0h: 8D 49 70 68 00 CD A3 6A B1 FA 9B 0C F9 29 44 9F 01fffcc0h: 43 50 AA EB E2 77 4C 41 4A F9 10 D2 2B F6 46 08 01fffcd0h: 84 38 80 A8 24 22 7F 32 15 13 7F 08 28 48 12 1D 01fffce0h: 84 37 E5 6F F3 BC 32 D8 0B 9C 26 14 00 BE 57 4C 01fffcf0h: CE 60 05 30 8C 09 A6 0A 04 84 AD 08 FB 07 58 E8

I have a hard time distinguishing polygon data visually. Does this look like a mesh to you guys?

Posted: **Mon Aug 21, 2017 12:42 pm**

Right after this, the first texture data is written to the FIFO. It's the 0x80 format and the reason Supermodel was never catching it is that for some reason, I now look at (header>>24) & 0x0F rather than all 8 bits. Maybe 0x80 in the most significant byte is just a flag of some sort. In Fighting Vipers 2, it looks like nonsense: an incrementing 8-bit value (the full 32 bits are not written).

Here, the first word encodes the length and the second normally encodes the texture format plus the size. All fields are 0 except the highest bit:

Code: Select all: 0000: 0000080c 0004: 80000000 0008: 00000000 000c: 00000004 0010: 00000008 0014: 0000000c 0018: 00000010 001c: 00000014 0020: 00000018 0024: 0000001c 0028: 00000020 002c: 00000024 0030: 00000028 0034: 0000002c 0038: 00000030 003c: 00000034 0040: 00000038 0044: 0000003c 0048: 00000040 004c: 00000044 0050: 00000048 0054: 0000004c 0058: 00000050 005c: 00000054 0060: 00000058 0064: 0000005c 0068: 00000060 006c: 00000064 0070: 00000068 0074: 0000006c 0078: 00000070 007c: 00000074 0080: 00000078 0084: 0000007c 0088: 00000080 008c: 00000084 0090: 00000088 0094: 0000008c 0098: 00000090 009c: 00000094 00a0: 00000098 00a4: 0000009c 00a8: 000000a0 00ac: 000000a4 00b0: 000000a8 00b4: 000000ac 00b8: 000000b0 00bc: 000000b4 00c0: 000000b8 00c4: 000000bc 00c8: 000000c0 00cc: 000000c4 00d0: 000000c8 00d4: 000000cc 00d8: 000000d0 00dc: 000000d4 00e0: 000000d8 00e4: 000000dc 00e8: 000000e0 00ec: 000000e4 00f0: 000000e8 00f4: 000000ec 00f8: 000000f0 00fc: 000000f4 0100: 000000f8 0104: 000000fc 0108: 00000000 010c: 00000004 0110: 00000008 0114: 0000000c 0118: 00000010 011c: 00000014 0120: 00000018 0124: 0000001c 0128: 00000020 012c: 00000024 0130: 00000028 0134: 0000002c 0138: 00000030 013c: 00000034 0140: 00000038 0144: 0000003c 0148: 00000040 014c: 00000044 0150: 00000048 0154: 0000004c 0158: 00000050 015c: 00000054 0160: 00000058 0164: 0000005c 0168: 00000060 016c: 00000064 0170: 00000068 0174: 0000006c 0178: 00000070 017c: 00000074 0180: 00000078 0184: 0000007c 0188: 00000080 018c: 00000084 0190: 00000088 0194: 0000008c 0198: 00000090 019c: 00000094 01a0: 00000098 01a4: 0000009c 01a8: 000000a0 01ac: 000000a4 01b0: 000000a8 01b4: 000000ac 01b8: 000000b0 01bc: 000000b4 01c0: 000000b8 01c4: 000000bc 01c8: 000000c0 01cc: 000000c4 01d0: 000000c8 01d4: 000000cc 01d8: 000000d0 01dc: 000000d4 01e0: 000000d8 01e4: 000000dc 01e8: 000000e0 01ec: 000000e4 01f0: 000000e8 01f4: 000000ec 01f8: 000000f0 01fc: 000000f4 0200: 000000f8 0204: 000000fc 0208: 000000fc 020c: 000000f8 0210: 000000f4 0214: 000000f0 0218: 000000ec 021c: 000000e8 0220: 000000e4 0224: 000000e0 0228: 000000dc 022c: 000000d8 0230: 000000d4 0234: 000000d0 0238: 000000cc 023c: 000000c8 0240: 000000c4 0244: 000000c0 0248: 000000bc 024c: 000000b8 0250: 000000b4 0254: 000000b0 0258: 000000ac 025c: 000000a8 0260: 000000a4 0264: 000000a0 0268: 0000009c 026c: 00000098 0270: 00000094 0274: 00000090 0278: 0000008c 027c: 00000088 0280: 00000084 0284: 00000080 0288: 0000007c 028c: 00000078 0290: 00000074 0294: 00000070 0298: 0000006c 029c: 00000068 02a0: 00000064 02a4: 00000060 02a8: 0000005c 02ac: 00000058 02b0: 00000054 02b4: 00000050 02b8: 0000004c 02bc: 00000048 02c0: 00000044 02c4: 00000040 02c8: 0000003c 02cc: 00000038 02d0: 00000034 02d4: 00000030 02d8: 0000002c 02dc: 00000028 02e0: 00000024 02e4: 00000020 02e8: 0000001c 02ec: 00000018 02f0: 00000014 02f4: 00000010 02f8: 0000000c 02fc: 00000008 0300: 00000004 0304: 00000000 0308: 000000fc 030c: 000000f8 0310: 000000f4 0314: 000000f0 0318: 000000ec 031c: 000000e8 0320: 000000e4 0324: 000000e0 0328: 000000dc 032c: 000000d8 0330: 000000d4 0334: 000000d0 0338: 000000cc 033c: 000000c8 0340: 000000c4 0344: 000000c0 0348: 000000bc 034c: 000000b8 0350: 000000b4 0354: 000000b0 0358: 000000ac 035c: 000000a8 0360: 000000a4 0364: 000000a0 0368: 0000009c 036c: 00000098 0370: 00000094 0374: 00000090 0378: 0000008c 037c: 00000088 0380: 00000084 0384: 00000080 0388: 0000007c 038c: 00000078 0390: 00000074 0394: 00000070 0398: 0000006c 039c: 00000068 03a0: 00000064 03a4: 00000060 03a8: 0000005c 03ac: 00000058 03b0: 00000054 03b4: 00000050 03b8: 0000004c 03bc: 00000048 03c0: 00000044 03c4: 00000040 03c8: 0000003c 03cc: 00000038 03d0: 00000034 03d4: 00000030 03d8: 0000002c 03dc: 00000028 03e0: 00000024 03e4: 00000020 03e8: 0000001c 03ec: 00000018 03f0: 00000014 03f4: 00000010 03f8: 0000000c 03fc: 00000008 0400: 00000004 0404: 00000000

Posted: **Mon Aug 21, 2017 12:49 pm**

LA Machineguns writes something slightly more interesting. Note that the high bit is now set for each value and that they no longer always increment by 4. Looks like a calibration curve. Might be instructive to plot it vs. offset to see how much it deviates from linearity. The data appear to be organized as 4 64-entry tables.

Code: Select all: Real3D DMA copy (PC=0000391C, LR=00003968): 0074A780 -> 94000000, 404 0000: 00000804 0004: 80000000 0008: 80000004 000c: 80000008 0010: 8000000c 0014: 80000010 0018: 80000014 001c: 80000018 0020: 8000001c 0024: 80000020 0028: 80000024 002c: 80000028 0030: 8000002c 0034: 80000030 0038: 80000034 003c: 80000038 0040: 8000003c 0044: 80000040 0048: 80000044 004c: 80000048 0050: 8000004c 0054: 80000050 0058: 80000055 005c: 80000059 0060: 8000005d 0064: 80000061 0068: 80000065 006c: 80000069 0070: 8000006d 0074: 80000071 0078: 80000075 007c: 80000079 0080: 8000007d 0084: 80000081 0088: 80000085 008c: 80000089 0090: 8000008d 0094: 80000091 0098: 80000095 009c: 80000099 00a0: 8000009d 00a4: 800000a1 00a8: 800000a5 00ac: 800000aa 00b0: 800000ae 00b4: 800000b2 00b8: 800000b6 00bc: 800000ba 00c0: 800000be 00c4: 800000c2 00c8: 800000c6 00cc: 800000ca 00d0: 800000ce 00d4: 800000d2 00d8: 800000d6 00dc: 800000da 00e0: 800000de 00e4: 800000e2 00e8: 800000e6 00ec: 800000ea 00f0: 800000ee 00f4: 800000f2 00f8: 800000f6 00fc: 800000fa 0100: 800000ff 0104: 80000000 0108: 80000004 010c: 80000008 0110: 8000000c 0114: 80000010 0118: 80000014 011c: 80000018 0120: 8000001c 0124: 80000020 0128: 80000024 012c: 80000028 0130: 8000002c 0134: 80000030 0138: 80000034 013c: 80000038 0140: 8000003c 0144: 80000040 0148: 80000044 014c: 80000048 0150: 8000004c 0154: 80000050 0158: 80000055 015c: 80000059 0160: 8000005d 0164: 80000061 0168: 80000065 016c: 80000069 0170: 8000006d 0174: 80000071 0178: 80000075 017c: 80000079 0180: 8000007d 0184: 80000081 0188: 80000085 018c: 80000089 0190: 8000008d 0194: 80000091 0198: 80000095 019c: 80000099 01a0: 8000009d 01a4: 800000a1 01a8: 800000a5 01ac: 800000aa 01b0: 800000ae 01b4: 800000b2 01b8: 800000b6 01bc: 800000ba 01c0: 800000be 01c4: 800000c2 01c8: 800000c6 01cc: 800000ca 01d0: 800000ce 01d4: 800000d2 01d8: 800000d6 01dc: 800000da 01e0: 800000de 01e4: 800000e2 01e8: 800000e6 01ec: 800000ea 01f0: 800000ee 01f4: 800000f2 01f8: 800000f6 01fc: 800000fa 0200: 800000ff 0204: 80000000 0208: 80000004 020c: 80000008 0210: 8000000c 0214: 80000010 0218: 80000014 021c: 80000018 0220: 8000001c 0224: 80000020 0228: 80000024 022c: 80000028 0230: 8000002c 0234: 80000030 0238: 80000034 023c: 80000038 0240: 8000003c 0244: 80000040 0248: 80000044 024c: 80000048 0250: 8000004c 0254: 80000050 0258: 80000055 025c: 80000059 0260: 8000005d 0264: 80000061 0268: 80000065 026c: 80000069 0270: 8000006d 0274: 80000071 0278: 80000075 027c: 80000079 0280: 8000007d 0284: 80000081 0288: 80000085 028c: 80000089 0290: 8000008d 0294: 80000091 0298: 80000095 029c: 80000099 02a0: 8000009d 02a4: 800000a1 02a8: 800000a5 02ac: 800000aa 02b0: 800000ae 02b4: 800000b2 02b8: 800000b6 02bc: 800000ba 02c0: 800000be 02c4: 800000c2 02c8: 800000c6 02cc: 800000ca 02d0: 800000ce 02d4: 800000d2 02d8: 800000d6 02dc: 800000da 02e0: 800000de 02e4: 800000e2 02e8: 800000e6 02ec: 800000ea 02f0: 800000ee 02f4: 800000f2 02f8: 800000f6 02fc: 800000fa 0300: 800000ff 0304: 80000000 0308: 80000004 030c: 80000008 0310: 8000000c 0314: 80000010 0318: 80000014 031c: 80000018 0320: 8000001c 0324: 80000020 0328: 80000024 032c: 80000028 0330: 8000002c 0334: 80000030 0338: 80000034 033c: 80000038 0340: 8000003c 0344: 80000040 0348: 80000044 034c: 80000048 0350: 8000004c 0354: 80000050 0358: 80000055 035c: 80000059 0360: 8000005d 0364: 80000061 0368: 80000065 036c: 80000069 0370: 8000006d 0374: 80000071 0378: 80000075 037c: 80000079 0380: 8000007d 0384: 80000081 0388: 80000085 038c: 80000089 0390: 8000008d 0394: 80000091 0398: 80000095 039c: 80000099 03a0: 8000009d 03a4: 800000a1 03a8: 800000a5 03ac: 800000aa 03b0: 800000ae 03b4: 800000b2 03b8: 800000b6 03bc: 800000ba 03c0: 800000be 03c4: 800000c2 03c8: 800000c6 03cc: 800000ca 03d0: 800000ce 03d4: 800000d2 03d8: 800000d6 03dc: 800000da 03e0: 800000de 03e4: 800000e2 03e8: 800000e6 03ec: 800000ea 03f0: 800000ee 03f4: 800000f2 03f8: 800000f6 03fc: 800000fa 0400: 800000ff

Posted: **Tue Aug 22, 2017 5:42 am**

Could be a gamma look up table?
I know the translator map table also writes to texture memory
It allocates a table of 256 entries

Posted: **Tue Aug 22, 2017 9:32 am**

256 entries is pretty small. It could easily be hiding under our noses as a normal texture, couldn't it?

Any chance this could be the translator map? I guess I ought to check Daytona 2, which would have a more distinctive set of values if this were really it.

Posted: **Tue Aug 22, 2017 9:40 am**

Honestly I've no clue what the translator map is even supposed to do
But as far as I can see it only effects textures anyway

Posted: **Wed Aug 23, 2017 9:59 am**

Something I didn't notice initially is that the last of these 4 tables has the values in descending order. Could this explain the color inversion in Daytona USA? Do the addresses line up in any way with the texture color indices + translator map bits? Daytona 2 uploads the exact same values as VON2 and Fighting Vipers 2.

Posted: **Wed Aug 23, 2017 2:13 pm**

Bart,
Virtua on seems to be changing the light model with different levels. I spent a few mins this evening debugging this thing and i noticed in between levels it writes to

void CReal3D::WriteTAP

Could there be data in here which configs the GPU ?

Posted: **Fri Aug 25, 2017 6:37 am**

Can't rule anything out, I suppose. I haven't really followed the lighting model discussions very well but are you guys sure the various differences and exceptions could not be explained by some sort of look-up tables internal to the Real3D being different? It seems highly unlikely that there would be config bits that switch between minor, fixed variations of a lighting model. Being able to modify some sort of internal color table makes more sense but even then, it's exceedingly bizarre that the developers at Sega would request the ability to do so given that the default lighting model already suits their purpose. The whole TAP functionality was probably never intended for anyone outside of Real3D themselves to mess with.

I'll have a look when I get some time this weekend to see what's being written. I don't know how many other games use the TAP after boot-up, so that will be worth investigating as well.

Out of curiosity, are the mis-colored elements in polygon RAM?

Posted: **Fri Aug 25, 2017 6:42 am**

No really the whole lighting model has been modified. It's only a minor change but it makes quite a profound difference to the final output colour

It's this in the shaders

// Optional clamping, value is allowed to be negative
if(sunClamp) {
sunFactor = max(sunFactor,0.0);
}

If the value is negative it literally subtracts from the ambient, making the scene darker.

Supermodel Forum

Boot-up data transferred to Real3D

Boot-up data transferred to Real3D

Re: Boot-up data transferred to Real3D

Re: Boot-up data transferred to Real3D

Re: Boot-up data transferred to Real3D

Re: Boot-up data transferred to Real3D

Re: Boot-up data transferred to Real3D

Re: Boot-up data transferred to Real3D

Re: Boot-up data transferred to Real3D

Re: Boot-up data transferred to Real3D

Re: Boot-up data transferred to Real3D